TICEL BIO PARK II
| |
|TICEL BIO PARK LTD |
| |
|VOLUME – III |
|TECHNICAL SPECIFICATION |
| |
|RE-TENDER FOR PROVIDING SUPPLY, INSTALLATION, TESTING AND COMMISSIONING OF 340TR CHILLER AND ASSOCIATED WORKS IN TICEL BIO PARK IN |
|TARAMANI, CHENNAI – 600 113. |
|DUE DATE FOR SUBMISSION: ON OR BEFORE: 17.11.2017 @ 3:00pm |
|TO BE SUBMITTED TO: M/s.TICEL BIO PARK LTD |
|Taramani Road, |
|Taramani, Chennai - 600 113. |
|Telephone No.: +91 44 22542061 / 62 |
|Fax No: 91-44-2254 2055 |
|E-Mail: md@ |
| |
|ENGINEERING CONSULTANTS: M/s.TAAMAESEK ENGINEERING CONSORTIUM |
|Architects & Engineers |
|No 5, 1 st Floor, |
|Bishop Wallers Avenue West. |
|Off TTK Road, Mylapore, |
|Chennai- 600 004 – INDIA. |
|Tel No: 044-24671139 / 57 |
|Fax No: 044-24672237 |
|E-Mail: info@ |
|TENDER SUBMITTED BY: |
| |
|M/s._________________________ |
| |
|Address_____________________ |
| |
|____________________________ |
| |
|____________________________ |
|November - 2017 |
TICEL BIO PARK LTD
PROVIDING FOR SUPPLY, INSTALLATION, TESTING AND COMMISSIONING OF 340TR CHILLER AND ASSOCIATED WORKS IN TICEL BIO PARK IN TARAMANI, CHENNAI – 600 113.
Volume – III
TECHNICAL SPECIFICATION
|CONTENTS |
|S.No |DESCRIPTION |Pages |
|1. |AIR COOLED BRINE CHILLER |3 |
|2. |CHILLED WATER PUMP SETS |24 |
|3. |PIPE WORKS AND RELATED VALVES |40 |
|4. |ELECTRICAL EQUIPEMENTS & RELATED WORKS |50 |
|5. |MODE OF MEASUREMENTS |56 |
|6. |TESTING |58 |
|7. |PERFORMANCE TESTING |59 |
|8. |TECHNICAL DATA TO BE FILLED BY CONTRACTOR |61 |
|9. |LIST OF APPROVED MAKES |62 |
1. AIR COOLED BRINE CHILLER
GENERAL: This Section specifies the requirements necessary to furnish and install complete
Air-cooled Brine chillers.
QUALITY ASSURANCE COMPONENTS:
The entire unit shall meet the requirements of the Machinery Directive.
FACTORY TESTS:
The chiller shall be tested for it performance under various load conditions in manufacturers testing facility. The performance test shall be shown at 100% load, 75% load, 50% Load & 25 % load with simulated ambient conditions of Chennai (103 DB/82WB Deg F). The manufacturer shall supply a certified test report to confirm performance as specified. The performance test shall be conducted in accordance with Euro vent / ARI and also as per site condition.
If the equipment fails to perform within allowable tolerances (± 5 % for Equipment Capacity (on Agreed Capacity) & ± 0% for Power Consumption) the manufacturer will be allowed to make necessary revisions to his equipment and retest as required. The manufacturer shall pay all expenses resulting from retesting. In the event that these revisions do not achieve submitted performance, Client reserves the right to reject the equipment or impose the following penalties:
1. Capacity Test: For each ton below 97 percent of the design capacity, INR 50,000
Fifty Thousand Only) per ton will be deducted from the contract price.
2. Power Consumption Test: INR 100,000 / KW Short fall.
3. Total Performance Penalty: The total performance penalty will be the capacity penalty
plus the power consumption penalty.
4. The Owner or his representative shall be notified 14 days in advance to witness.
5. The factory performance test: All the expenses towards Visit for witnessing performance test at manufacturers facility for 5 representatives from Clients side should be considered in the Vendors Offer.
6. A certified test report of all data shall be submitted to the Owner prior to completion of
the project. The factory-certified test report shall be signed by an officer of the
manufacturer's company. Preprinted certification will not be acceptable certification shall be in the original.
7. Manufacturer shall operate chiller for 4 hours and maintain LBT at plus or minus 0.28
degree C to tolerance. Temperature tolerance to be recorded with strip chart recorder
or data logger.
8. Declared COP figures shall be demonstrated during the chiller test.
9. Factory Balance: The chillers shall be factory balanced in accordance with the following procedure. During factory dynamic balance, equipment shall be at the design load.
Balancing shall be performed on an elastic suspension test apparatus. This test base must weigh no more than 15 percent of the equipment weight and provide a minimum of 25-mm actual spring deflection for its suspension.
Vibration measurements shall be made in three orthogonal axes at each
bearing location. Overall velocity shall be measured in the frequency range of 2 Hz to 1,000 Hz and reported to the Contractor in histogram certified and signed by an officer of the manufacturer's company. Include date from startup and surge events.
Vibration shall not exceed 2.5-mm-per-second peak in any axis.
10. Submittals: Provide the following in addition to the standard requirements with the Bid:
Complete specifications, descriptive drawings, catalog cuts, maintenance manuals, and descriptive literature which shall include make, model, dimensions, weight of equipment, electrical and control field wiring diagrams, breaker settings, electrical schematics, motor starting and motor torque curves, remote starter under voltage relay settings, part-load performance curves, and external field connections for all service.
Catalogue cuts on flow switches, temperature switches. Installation details:
Weight of compressor/motor assembly Starter requirements as per the technical
specifications. Include information on retrofitting proposed chillers to future.
11. Refrigerants General Description:
The Contractor shall ensure that the equipment offered is selected and installed to minimized noise & vibration levels. Exposed metal surfaces shall be painted with an air- dry beige direct to metal single component paint prior to shipment. Each unit shall ship with a full operating charge of refrigerant and oil. Molded neoprene isolation pads shall be supplied for placement under all support points. Start-up and operation instruction by factory trained service personnel shall be included.
CODES & STANDARDS:
The design, materials, construction, inspection, testing and performance of screw liquid Chilling package shall comply with all currently applicable statues, regulations, codes and standards in the locality where the equipment is to be installed. Nothing in this Specification shall be construed to relieve the CONTRACTOR of this responsibility.
In particular, the screw liquid chilling package shall conform to the latest edition of following
standards.
ASHRAE 15 / ASHRAE 23 : Safety Code for Mechanical Refrigeration Method of testing for rating positive
displacement refrigerant compressors and condensing units.
ASHRAE 30 : Methods of testing liquid chilling packages.
ASME SEC VIII, DIV 1 : Boiler and pressure vessel code.
ANSI B 31.5 : Code for refrigeration piping.
ARI 550 / 590 : Water Chilling packages using the
Vapour compression cycle.
ARI 575 : Standard for method of measuring machinery sound within an equipment space.
TEMA : Standards of the Tubular exchanger
Manufacturers association.
CONSTRUCTION:
The chiller package shall consist of compressor-motor units, condenser coils, condenser fans, chiller, receiver, refrigerant piping & fittings, refrigerant feeding devices, valves, strainer, liquid moisture indicator, suction line insulation, first charge of oil & gas, starter panel & Micro-processor panel etc., all the components being mounted on welded steel base frame; the base frame, structural profiles & panels made of galvanized sheet steel (GSS) shall be protected with primary coating & finished with acrylic paint. The machine shall be mounted on vibration isolators. The package shall be suitable for outdoor installation; in other words, no weather protection of any kind by way of wall or roof is contemplated.
The machine mounted Microprocessor panel & starter panel shall be suitable for outdoor application & shall confirm IP - 55 grade of protection. The panel shall incorporate main disconnect switches, fuses for individual compressor motors, contactors, over load relays, single phase preventors, under/ over voltage trip, on/off push buttons, auto manual switches to
facilitate automatic operation through DDC System or for manual operation to facility.
For remote starting & stopping of chiller packages, auxiliary contactors, etc. if any required. The disconnect switches provided shall be suitable for terminating aluminum conductor PVC cables If not all necessary arrangements for terminating Aluminum PVC conductor cable, Water flow switch/compressor Sound jacket/Fins External mesh for protection shall be carried out by ACMV Contractor / Chiller manufacturer at his cost.
The Contractor should furnish the details the microprocessor panel can handle & display the details on the panel board along with his bidding.
The chillers shall incorporate segmental baffles in the shell. The shell shall include adequate number of drain points of ample size to permit draining and cleaning of the shell side. The refrigerant heads shall incorporate liquid inlet and suction outlet connections, bypass divisions, equalizer and oil return connections.
COMPRESSOR:
The compressor motor unit shall be accessible semi-hermetic direct drive, 3000 rpm at 400V, 50 Hz, rotary screw compressor suitable for use with refrigerant R134A. It shall be complete with suction and discharge shut-off valves, relief valve, oil filter, suction filter, muffler, dual manual reset type pressure state, oil safety switch, refrigerant suction and discharge pressure gauges, crankcase heaters and relays, direct coupled motor, oil separator, oil cooler. The compressor shall incorporate automatic capacity control feature. The unit shall be provided with slide valve unloading for partial load operations. The compressors shall have reducing capacity down to 20% of full load condition. Motor shall be suction gas-cooled, hermetically sealed, two pole, squirrel cage induction type. Further, compressors should be in unloaded condition during starting.
BRINE CHILLERS:
Brine Chillers shall be of shell & tube Flooded Design type and shall be insulated with rubber or polyvinyl chloride foam. The shell shall be of MS and tubes shall be of copper in construction.
Chillers shall be suitable for use with thermostatic / electronic expansion valves as refrigerant feeding device. Provision shall be made on the chiller for fixing manually reset-type antifreeze thermostat. Evaporator shall be designed, tested and stamped in accordance with ASME Code for refrigerant side working side pressure of 200 psig and test pressure shall be 300 psig.
AIR COOLED CONDENSOR:
The condenser coil shall be made out of copper tube with Aluminium Black epoxy coated fins. The coils shall be sized so as to optimize performance with respect to air flow rate, pressure drop, condensing temperature, power consumption, etc. Thus the values furnished for the parameters of the coil in the Schedule of Equipment shall be regarded as suggested values rather than specified values.
The condenser coils shall provided with protective weld mesh to protect the fins from damage.
CASING:
The casing and structure of the machine shall be of robust construction. The panels shall be of heavy gauge, hot dip galvanized steel and they shall be assembled with folded joints. The entire assembly is painted, which is tested to withstand 500hrs minimum in salt spray tog test. Where and if ferrous materials are used, whether for supporting structure or for any other system or for components, such materials / components / sections shall be given one coat of epoxy primer and two coats of epoxy paint of approved colour.
FAN MOTOR SETS (HIGH EFFICIENCY ABOVE 95%):
The air cooled condenser shall incorporate necessary number of propeller fans of adequate size to obtain the required air flow rate under operating conditions. The fan shall be balanced both statically and dynamically. The fan motor shall be of TEFC squirrel cage construction and to IP-55 protection. Wherever condensers with discharge of hot air in the vertically upward direction are involved, special care must be taken to ensure that the fan motors are suitable for such service. The motor shall be suitable for outdoor installation and also for location in the stream of hot air leaving the condenser coil. The fan motor sets shall be complete with protecting guards.
REFRIGERANT CIRCUIT:
An electronically controlled expansion valve shall be provided to maintain proper refrigerant flow.
INTEGERAL CONTROL PANEL& CONTROLS:
The unit shall have a microprocessor-based control panel with a diagnostic display and a keypad.
The control panel shall be provided in accordance Electrical and Controls Requirements For Packaged Equipment. The unit control panel shall be equipped with the following:
1. Electronic display to indicate evaporator, condenser pressures.
2. Motor current draw limit selector switch or key pad input for determining percent of full load current allowed, adjustable between 40 and 100 percent.
3. One contact shall be provided for an all-inclusive failure alarm of the chiller. This remote alarm-annunciation contact shall be of fail-safe design (a normally open contact maintained closed in non-alarm conditions) so as to alarm upon the loss of control power or upon any other failures to the chiller. The dry contact is to be rated at 10 amps 120 Vac.
4. A chiller operating control mode selector at the chiller control panel for off, local, and remote control mode selections.
In the remote mode, the chiller controls must operate in the following manner:
a. When in the remote run position, the chiller shall accept two 24 Vdc signals,
one to
start and one to stop the chiller.
b. When the chiller is commanded to run (either locally or remotely), the
chiller will command the evaporator isolation valves to open and evaporator
pumps
to run via a dry contact closure (rated 10 amps, 120 Vac) located in the chiller
cabinet. Pump control power will be provided from the individual MCC control
circuits ( 24 Vdc).
5. Safety controls and interlocks for unloaded start, time between starts, refrigerant pressure and temperature, condenser water, and evaporator water flows, pressure switches and proof of status switches, anti-freeze protection, oil pressure and temperature, surge protection, phase unbalance, phase reversal, electrical distribution protection, high current limit, and high motor temperature. Provide ride-through capability of 6 cycles at 30 percent voltage sag. Antifreeze protections to be part of scope.
6. Temperature sensors for the chilled water inlet/outlet lines shall be furnished, installed, and pre wired with the chiller package.
7. Operating hours and number of starts shall be available in microprocessor display. This function may also be provided through the Integral Control Panel software.
8. Field interface terminal strip for all field wiring.
9. Chiller operating mode, chiller outlet brine temperature and set point, current
limit set point, and system diagnostic information displays.
The control system shall provide the following chiller control functions:
* Sequencing.
* Lead / Lag.
* Failure Recovery
* Diagnostics
* Operator Interface
* System Optimization
* Protection against single phasing and under voltage.
It shall be able to perform and program the running time for a minimum 3 months. It shall be capable of equalizing the total running hours of all the compressors housed in the unit.
All safety and cycle shutdowns shall be annunciated through the alpha-numeric display and consist of day, time, cause of shut-down and type of re-start required.
Safety shutdowns shall include:-
* High oil pressure.
* High compressor discharge pressure.
* Low evaporator refrigerant pressure.
* Motor fault
* Sensor malfunction
* Antifreeze protection
Cycle shut-downs shall include:-
* Low brine water outlet temperature.
* Low oil temperature.
* Chilled water low flow or interruption or chilled water pump failure
* Power fault.
* Internal Time lock.
* Anti-recycle.
System operating information shall include:
* Chilled brine inlet and outlet temperature.
* Evaporator and condenser temperatures.
* Oil pressure and oil filter differential pressure
* Oil temperature and oil level
* Suction and discharge temperatures
* Slide valve position.
Chiller package status like Start-up sequence status & Shut-down and operation status
* Number of compressor starts.
* Total hours of operation.
* Hours since last start.
* Fault history.
Security access shall be provided to prevent unauthorized change of set points and to allow authorized local or remote control of chilling package.
The Control panel shall include machine protection shutdown with automatic reset when the condition is corrected for:
* Momentary power loss
* Under/over voltage
* Loss of evaporator or condenser water flow
Over 100 diagnostic checks shall be made and displayed when a fault is detected. The display shall indicate the fault, the type of reset required, the fault, the time and date the diagnostic occurred, the mode in which the machine was operating at the time of the diagnostic and a help message. A diagnostic history shall display the last 20 diagnostics with the time and ate of their occurrence.
Clear language Display Panel:
Factory mounted to the door of the control panel, the operator interface shall have a 16 button keypad for operator input and a two line by 40 character display screen. A chiller report, refrigerant report, compressor report, an operator configurable custom report, operator configurable custom report, operator settings, service settings, service tests, and diagnostics may thus be accessed. All diagnostics and messages shall be displayed in “clear language.”
The data contained in the chiller report, refrigerant report, and compressor report shall include:
* All brine temperatures and set points
* Current chiller operating mode
* Diagnostic history
* Control Source (ie., local panel, external source, remote BAS)
* Current Limit set points
* Outdoor air temperature.
* Saturated refrigerant temperatures and pressures
* Compressor starts and hours running
* Line currents
* Line Voltage.
* Approach temperatures.
All necessary settings and set points shall be programmed into the microprocessor controller via keypad of the operator interface. The controller shall be capable of receiving signals from a variety of control sources (which shall not be mutually exclusive - ie.,, any combination of control sources can coexist simultaneously) and shall be capable of programmed at the keypad as to which control source has priority.
Control sources can be:
* Local operator interface (standard).
* A 4-20 mA or 2-10 VDC signal from an external source.
Control panel shall be interfaced with Third Party BMS system. Necessary Integrator required for integrating the chillers with third party BMS System should be considered in quote of Chiller Package. Chiller Manufacturer shall consider all necessary hardware & software required for integrating with Third Party BMS System. It should be possible to transfer all the parameters available on the microprocessor panel to third party BMS System and also it should be possible to view / control the system using the above integrator from third party BMS System.
“Communication link between the chillers and the BMS shall be provided to make all the status / parameters in the chillers’ microprocessor based panel available in the BMS. For this purpose, the ACMV NSC shall provide all necessary hardware and software at the chiller end to make available the data in any one of BacNet, Lon or ModBus protocols. The ACMV Contractor shall provide all engineering data such as address and data list, type of connection, baud rates, handshake, parity, etc. to the BMS Contractor. The ACMV Contractor shall also provide the looping / interlinking of the chillers’ microprocessor based panels. The BMS Contractor shall provide all necessary hardware and software at the BMS end and also the interconnecting cable between the chillers’ master panel and the BMS. In case of multiple makes / models of the chiller panels, as many links as required for each make / model shall be provided by the BMS Contractor and the ACMV Contractor shall loop each make / model’s panels. The BMS Contractor shall use the engineering data provided by the ACMV Contractor to implement the communication link. The BMS supplier shall perform all engineering including and up to generation of graphic pages, reports, alarms, etc. to display the status / parameters. The chiller’s microprocessor panel shall have multiple hierarchy password protection for managing access to various categories of O&M personnel. The entire chiller package including microprocessor panel shall be suitable for operation in ambient temperature up to 50 deg. C
UNIT MOUNTED STARTER:
A NEMA 1 type enclosure with top power wiring access and three phase solid-state overload protection. Starters shall be available in Wye-Delta closed-transition configuration. The starter shall be factory mounted and completely pre-wired to the compressor motor and the control panel. A factory installed and wired 600 VA control power transformer provides all unit control power (120 VAC secondary) as well as UCP2 module power (24 VAC) secondary. It should also have an additional feature like circuit breakers and mechanical non-fused disconnects.
ISOLATION MOUNTING:
Isolation mountings should be furnished by the manufacturer and installed by the installation contractor.
EXECUTION:
A chiller manufacturer’s service technician shall assist the subcontractors by visiting the site once at 50 percent installation and a second visit prior to startup, and provide written certification that the equipment has been completely installed as specified and in accordance with the manufacturer’s directions as approved.
FUNCTIONAL TESTING
Tests shall be in accordance with ARI 550/590-2004 / Eurovent Standards. APLV method shall be used for nonstandard conditions.
The manufacturer’s service technician shall provide initial startup of the chillers in Clients presence. Inspect all piping and electrical circuits. Provide and charge the machines with initial refrigerant and oil charges. Perform initial startup of the chillers, measure and adjust water flows through the machine components for proper operation of the system, and complete other functions normally associated with startup. Coordinate these procedures so that the cooling tower service representative can provide initial tower startup at the same time. Perform operating checks on all operating and safety controls. Calibrate all integral controls, gauges, and thermometers, as well as all field-mounted controls furnished with the chiller. Provide required programming and setup of the required hardware / software assistance to the BMS vendor for software integration.
Before starting the chiller, confirm that the remote starters have been field checked and certified in writing by an authorized factory service representative.
During initial run testing of the chillers, provide support for the starter. authorized factory service representative to reinspect the starters to ensure that the devices are operating correctly, all electrical connections are tight and secure, and that the ammeter is properly calibrated. In addition, check for proper loading and perform all calibrating procedures on the motor overload relays to match the cutout points with the requirements of the chiller motor. Verify the equipment operates as designed, and rectify all deficiencies. Perform an oil analysis after 200 hours of operation.
GAURANTEE PERFORMANCE:
The guarantee shall be valid for a period of 18 months after taking over and any parts
found defective during this period shall be replaced free of all costs by Contractor. Five
years warranty for replacement of compressors including material and labor shall be
provided for imported chilling units. The services of successful Contractor’s personnel if
requisitioned by the CLIENT’S during this defects liability period for such work shall be
made available free of any cost.
The contractor shall without any extra cost carry out for a period of 18 (Eighteen) months
after the installation is taken over, all routine and special maintenance of the plant and
attention to the defects that may arise in the operations of the plant.
The smart maintenance provided during this period shall be fully comprehensive and
shall include but nor limited to all equipment, labour, part and emergency calls providing
on site response within 24 hours.
The smart maintenance [to identify when maintenance is required and to monitor
performance and to diagnose problems more quickly and adequately than through
traditional means] shall also include a minimum of 18 monthly preventive maintenance
visits by qualified personnel of the ACMV Contractors who are thoroughly familiar with
the type of equipment and system provided for this project.
Maintenance will consist of monthly maintenance and necessary adjustment and lubrication
of the equipment by the contractor’s employee under competent direction and supervision.
In addition to the monthly maintenance, special examination between regular intervals and
emergency minor adjustment, call back services should be provided during the guarantee
period.
Parts that become necessary due to normal wear and tear during the guarantee period will
have to be replaced free of cost. The guarantee shall cover loss of refrigerant and oil also,
which in the judgement of the Engineer-in-charge arises from defective material and
workmanship.
The performance of AC Contract will be considered reached, when the initial balancing
report is accepted by the Owner’s representative and in the opinion owner’s representative,
all systems have been satisfactorily installed, operated, tested, balanced and adjusted to
meet the specified and intended performance. The performance will not depend upon rechecking after six months, however, make sure relevant repairs or modifications deemed
necessary during this re-checking as part of Guarantee of the work. The Owner’s
representative may request such additional testing in connection with this project as he
deems necessary.
During the guarantee and maintenance period, the ACMV contractor shall supply the
following consumable materials as and when required.
a) All oil and greases required for lubrication of compressor, fan bearings, motor
bearings, pivots and other moving parts.
b) All refrigerant required to replace refrigerant losses in the refrigerant system.
c) All consumable filter elements / rolls.
d) All belts required to be replaced worn-out
e) Mono-ethylene Glycol and PCM nodules, chemicals for water treatment.
The cost of these consumable materials shall not be charged for separately by ACMV
contractor, but shall be deemed included in the contract price.
In case of any defect or malfunctions of the equipment during the period maintenance,
immediate attention must be ensured without claim to any extra amount, charges or
compensation.
If the defect is not attended within reasonable time of its occupancy, the CLIENT’S may
proceed to do so at the Contractor’s risk and expenses (to be mutually agreed upon)
without prejudice to any other rights and also the guarantee period of 18 (Eighteen) months
will be extended by the duration of down time of the plant.
All the maintenance work will be performed during regular hours of regular working days.
However the works in condenser coil and cleaning of cooling coils etc., should be carried
out only during the holidays with prior permission from the CLIENT’S.
It is the obligation and responsibility of the operating/service/maintenance personnel to
work safely. Failure to comply with any of these requirements could result in serious
damage to the equipment and /or the property in which it is situated as well as severe
personal injury or death to people at site. It is expected that any one operating
/maintaining or servicing these equipment, possess the knowledge that will enable them
to perform tasks properly and safely. This individual shall also comply with all applicable
Governmental Standards and Regulations pertaining to the task in question.
During operation /maintenance or service, individuals may be exposed to certain
components or conditions including, but not limited to, refrigerants, oils and materials
under pressure, rotating components and both high and low electrical voltages. Each of
these items has the potential, if misused or handled improperly to cause bodily injury or
death. It is essential that operating /service /maintenance personal identify and recognize
these inherent hazards, protect themselves and proceed safely in completing their tasks.
Works on electronic equipment should not be undertaken unless the individual(s) have
been trained in the proper maintenance of equipment and is (are) familiar with the
potential hazards.
System components should be maintained according to the individual manufacturer
recommendations, as their operation will affect the operation of the ACMV system
One month before the end of the defects liability period, the Contractor notify the CLIENT’S
of the required inspections for all equipments and facilities including specific energy
consumption.
Just before the expiry of the warranty period of the Contract, the ACMV Contractor shall
carry out a complete system operability test on all the systems or sub-systems as called
for in the Contract. The purpose of the test is to verify that the performance of all the
systems or sub-systems in the Contract is in accordance to the Specifications. All tests
shall be carried out in the presence of the CLIENT’S or his representative. The warranty
period is deemed to be over if the CLIENT’S or his representative is completely satisfied
with the system performance during the test.
All the scheduled maintenance operation detailed in this specification shall be performed
at the specified times by suitably trained and qualified personnel. Failure to satisfy any of
these conditions will automatically void the warranty. It should noted that interval
necessary between each minor and major services can vary depending on, for
installation, application, site condition and expected operated schedule. Failure to follow
manufacturers recommendation could cause damage to ACMV system or loss of
performance and may invalidate the warranty
Provide a manufacturer’s warranty to protet the shaft seal, reservoir and float valve system against leakage of oil and refrigerant to the outside of the chiller for a period fo 5 years from initial startup, including parts and labour to replace a defective seal and any refrigerant required to trim the charge to original specifications. Inspections shall be performed on at least an annual basis.
Provide a 1 ½ year warranty for parts, labour and refrigeration from date insuance of occupancy permit. Warranty to coincide with manufacturer’s parts warranty.
MINIMUM SERVICE REQUIREMENTS:
In order to establish the minimum service requirements, a manufacturer’s representative for the equipment specified herein shall be present at the jobsite for:
Functional testing for each chiller including installation assistance, inspection,
and certification of the installation.
Operation and maintenance instruction on chiller system.
TECHNICAL REQUIREMENTS OF AIR COOLED BRINE CHILLER PACKAGE
|S.NO |DESCRIPTION |TECHNICAL DETAILS |VENDORS TO CONFIRM |
|A |GENERAL | | |
|1 |Type of the Chiller |Air-cooled Brine (Ethylene Glycol) Screw | |
| | |Chiller Package. Make – TRANE - (France) | |
|2 |Actual Capacity at specified design conditions |Normal mode 340 TR Capacity @ 4 / 9 deg C | |
| |per chiller package (Don’t Quote for Nominal |conditions.During Chargeing mode (-) 5.0 | |
| |Capacity) |deg C to 0 deg C conditions. | |
|3 |Quantity Required |1No complying to the technical | |
| | |specifications attached | |
|4 |Location |Terrace of the Utility Block / New | |
| | |Substation. | |
|5 |Refrigerant |R 134 a. | |
|6 |Chiller shall be Variable flow |Yes | |
|7 |Chiller flow - medium |Brine | |
|8 |Maximum IKW/TR at full load@40Deg C |1.4 Higher Efficiency Machine not more 1.4 | |
| | |kw/TR at design conditions should only be | |
| | |quoted. IKW/TR should be selected at actual| |
| | |design conditions & not at ARI Conditions. | |
| | |Please Attach Computer Selection Details in| |
| | |form of both hard copy & soft copy at | |
| | |various % of loads. | |
|9 |Maximum noise level at a distance of 1.5 meters|80 dB . If required additional acoustic | |
| |any where in the terrace |media should be used to reduce the noise | |
| | |level of the machine to meet requirements. | |
|10 |Integrator with necessary Hardware / Software |Yes. Integrator with necessary Hardware / | |
| |for integrating with Third Party BMS System |Software for integrating with Third party | |
| | |BMS System should be considered. All | |
| | |parameters available on the microprocessor | |
| | |panel should be transferred to third | |
| | |party System & also it should be possible| |
| | |to monitor / control from remote location. | |
|11 |Type of finish |Epoxy paint / Non-Corrosive Acrylic Paint, | |
| | |it should be compactable with Sea shore | |
|12 |Power Supply Rating |400 V 3 ph 50 HZ earthed neutral with | |
| | |variation of + / -10 %. | |
|B |COMPRESSOR | | |
|1 |Type |Accessible Hermetic Screw / Semi Hermetic | |
| | |with double | |
|2 |No of compressors |3/4 | |
|3 |Drive |Gear | |
|4 |Drive Guard |Required | |
|5 |Capacity control |Between 20 to 100 % either in for step or | |
| | |stepless. | |
|6 |Static & Dynamic balancing of screws as per ISO|Required | |
| |1940 | | |
|7 |Compressor Motor KW |Refer Technical Details | |
|8 |Compressor Motor Speed – rpm |3000 rpm | |
|C |CHILLER | | |
|1 |No. of chillers per machine |One | |
|2 |Type |Shell & tube , Flooded Type / Dx | |
|3 |Liquid to be cooled |Ethylene Glycol | |
|4 |Chilled Brine inlet temperature (during normal |9 deg C | |
| |mode) | | |
|5 |Chilled Brine outlet temperature (during normal|4 deg C | |
| |mode) | | |
|6 |Chilled Brine outlet temperature |(-) Minus 5 deg C | |
| |(during charging mode) | | |
|7 |Minimum chilled Brine flow per |1020 US GPM | |
| |package | | |
| |during normal operation) | | |
|8 |Chiller and suction line insulation |Required | |
|9 |Pressure drop across chiller |Not to exceed 16.00 ft H2O | |
|10 |Fouling Factor |0.0001 hr-sqft-deg F / Btu | |
|D |AIR COOLED CONDENSER | | |
|1 |Capacity | | |
|2 |Type of condenser |Out door Air Cooled type | |
|3 |Ambient temperature – deg C |40.0 deg C | |
|4 |Condensing temperature – deg C |55.0deg C | |
|5 |Type of fan |Propeller | |
|6 |Fan arrangement |Shaft vertical, Air delivering upwards | |
|7 |No of Fans |12 or as per manufacturers standards | |
|8 |Fan motor KW / each |1.1 KW each | |
|9 |Type of fan motor |Suitable for out door application – | |
| | |confirming to IP 55 | |
|10 |Fins concentrations fins / cm |Not less than 5.5 | |
|11 |Material of the tubes |Copper | |
|12 |Material of fins |Black epoxy Aluminium | |
|13 |Type of fins |Plate or helical fins | |
|E |BRINE PROPERTIES | | |
|1 |Type of Brine to be added |Ethylene Glycol | |
|2 |Minimum Brine Concentration |30% Solution by volume | |
|3 |Freezing Point of Brine at the |Not less than 13 deg F | |
| |above concentration | | |
|4 |Specific Gravity of the Brine at the above |Not less than 1.04 | |
| |concentration | | |
|5 |Specific Heat of the Brine at the |Not less than 0.9 Btu / lb-F | |
| |above concentration | | |
|6 |Thermal Conductivity at the |Not less than 0.3 Btu/hr-sqft-F/Ft | |
| |above concentration | | |
|F |Percentage of Load |IKW/TR at 40 Deg C |NET TR |
|1 |100% Load | | |
|2 |75% Load | | |
|3 |50% Load | | |
TECHNICAL REQUIREMENTS OF AIR COOLED BRINE SCREW CHILLER
|S.NO |DESCRIPTION |TECHNICAL DETAILS BY VENDOR |
|A |GENERAL | |
|1 |Make & Model | |
|2 |Capacity at operation conditions | |
|3 |Operating Condensing Temperature [- deg C] | |
|4 |Operating Suction temperature [- deg C] | |
|5 |Leaving water Temperature [- deg C] | |
|6 |Overall dimensions including stand [- mm x mm x mm] | |
|7 |Operating Weight [- Kg] | |
|8 |Operating Charge [- Kg] | |
|9 |Minimum clearance required from adjacent structures [-| |
| |m] | |
|10 |Minimum clearance required between two machines [- m] | |
|11 |Whether any platform or pedestal required for | |
| |installation? If so, furnish details | |
|12 |Noise level at a distance of 1 m from the machine at | |
| |intervals of 1 m along the perimeter | |
|13 |Noise level when all the machines are working [- db] | |
|B |Casing | |
|1 |Material | |
|2 |Thickness of material | |
|3 |Method and details of construction | |
|4 |Nature and joints of constriction | |
|5 |What is the finish, i.e, hot dip? galvanized, | |
| |corrosion resistant, etc., | |
|6 |Whether factory fabricated? | |
|C |COMPRESSOR MOTOR UNIT : | |
|1 |Type of Compressor | |
|2 |Manufacturer’s Name | |
|3 |Model | |
|4 |Refrigerant | |
|5 |Number of cylinders | |
|6 |Bore and stroke [- mm ] | |
|7 |Maximum speed [- rpm] | |
|8 |Displacement at maximum rpm [- cmh] | |
|9 |Capacity at maximum displacement and | |
|10 |[55.0 Deg C] condensing and [-3 deg C] suction [- TR]| |
|11 |Operating condensing and suction temperature [- deg C]| |
|12 |Speed at design operating conditions [- rpm] | |
|13 |BKW | |
|14 |Motor losses | |
|15 |KW at operating conditions | |
|16 |KW / TR at operating conditions | |
|17 |Capacity control - automatic or manual ? (Note : | |
| |Please attach descriptive literature ) | |
|18 |Full load current [- amps] | |
|19 |Starting current [- amps] | |
|20 |Number of steps of capacity control | |
|21 |Capacities and corresponding BKW | |
|22 |Noise level at a distance of 1 m [- db] (A) | |
|D |CHILLER: | |
|1 |Type of chiller (Single Circuit or Dual Circuit) | |
|2 |Shell OD [- mm] | |
|3 |Overall length [- mm] | |
|4 |Overall weight [- Kg] | |
|5 |Chiller connections | |
|6 |Inlet Dia [- mm] | |
|7 |Outlet Dia [- mm] | |
|8 |Number of tubes | |
|9 |Tube OD [- mm] | |
|10 |Nature of tubes (whether integrally finned or whether | |
| |tubes carry inserts ) | |
|11 |Length of tube between tube sheets | |
|12 |Material of tube | |
|13 |Material of shell | |
|14 |Water side surface area [- sqm] | |
|15 |Refrigerant side surface area [- sqm] | |
|16 |Minimum operating charge of refrigerant [- Kg] | |
|17 |Flow rate [- lpm] | |
|18 |Refrigerant temperature [- deg C] | |
|19 |Leaving temperature difference [- deg C] : | |
|20 |No. of passes | |
|21 |Tube velocity [- mps] | |
|22 |Pressure drop [- Kg / sqcm] | |
|23 |Pressure drop [- Kg / sqcm] | |
|F |AIR COOLED CONDENSER: | |
| |General : | |
|1 |Manufacturer’s name | |
|2 |Model | |
|3 |Heat rejection capacity at operating conditions i.e., | |
| |[40.0 Deg C] ambient air and [-3 deg C] suction | |
|4 |Condensing temperature [- deg C] | |
|5 |Overall dimension including stand [- mm x mm x mm] | |
|6 |Operating weight [- Kg.] | |
|7 |Minimum clearance required from adjacent structures [-| |
| |m] | |
|8 |Minimum clearance required between two condensers [- | |
| |m] | |
|9 |Whether any platform or pedestal required for | |
| |installation ? If so, furnish details | |
|10 |Power consumption [- KW] | |
|11 |Whether fans are satirically and dynamically balanced?| |
|12 |Material of the blades | |
|13 |Material of the hub | |
|14 |Motor rating [- KW] | |
|15 |Motor speed [- rpm] | |
|16 |Make | |
|17 |Type of motor | |
|18 |Electric supply required i.e., voltage & whether | |
| |single phase or three phase ? | |
|19 |Whether motor suitable for outdoor duty | |
|20 |Nature of motor enclosure | |
|21 |Material of shaft | |
|22 |Type of drive | |
|23 |Whether motor being mounted with shaft vertical? If | |
| |so, are bearings designed to suit this mounting | |
| |arrangement | |
|24 |Make of fan | |
|G |Condenser Coil: | |
|1 |Air flow rate [- cmh] | |
|2 |Coil face area [- sqm] | |
|3 |No. of rows | |
|4 |Fin density [- No. of fins / cm] | |
|5 |Material of tube | |
|6 |Tube OD [- mm] | |
|7 |No. of tubes | |
|8 |Length of tubes [- mm ] | |
|9 |Material of fin | |
|10 |Overall weight [- Kg] | |
|11 |Entering air db [- deg C] | |
|12 |Leaving air db [- deg C] | |
|13 |Condensing temperature [- deg C] | |
|14 |Whether any sub-cooling circuit provided and if so, | |
| |indicate the deg C of sub-cooling | |
|15 |Pressure drop across the coil [- mm wg] | |
|16 |Operating charge [- Kg] | |
|17 |Maximum charge [- Kg] | |
| |Is a receiver required ? If so, whether receiver | |
| |included. | |
|18 |Test pressure [- Kg] | |
|19 |Method of test | |
DATA TO BE FURNISHED BY THE CONTRACTOR AFTER THE AWARD OF CONTRACT:
1. Quality Assurance Plan (QAP).
2. Dimensioned general arrangement drawing showing all accessories, mounting,
details, nozzle location etc., for the air cooled screw chiller packages.
3. Overall space and head room requirement details of handling during erection,
operation and maintenance.
4. Foundation drawing with static and dynamic loading details, pocket data,
Foundation outline etc.
5. Cross sectional drawings of all items with part list and materials of construction.
6. Power wiring and control wiring diagrams.
7. Operation and maintenance manual.
2. CHILLED WATER PUMP SET
GENERAL
This section specifies the requirements necessary to furnish various type of centrifugal pump sets as shown in the Main schematic Diagram.
REGULATORY REQUIREMENTS
▪ Conform to Health/Life Safety Code for Public Schools.
▪ Conform to International Mechanical Code.
▪ Conform to BOCA National Building Code.
▪ Conform to BOCA National Fire Protection Code.
▪ Conform to State of Illinois Plumbing Code.
▪ Conform to National Electric Code NFPA 70.
▪ Conform to Illinois Accessibility Code.
▪ Conform to applicable ANSI/HI standards.
▪ Conform to applicable ANSI/HI standards.
▪ Products: Listed and classified by Underwriters Laboratories, Inc. as suitable
for the purpose specified and indicated.
SUBMITTALS WHICH NEED TO BE SUBMITTED ALONG WITH THE OFFER
▪ Submit each item in this article according to the Conditions of the Contract as
listed in Volume I and Specification Sections.
▪ Submit manufacturer’s installation instructions under provisions of General
Conditions listed under Volume I & technical specifications.
▪ Product Data including certified performance curves and rated capacities of
selected models, weights (shipping, installed, and operating), furnished specialties,
and accessories. Indicate pump’s operating point on curves.
▪ Complete Package information Product Data including:
▪ System summary sheet (where applicable.
▪ Sequence of Operation.
▪ Shop drawing indicating dimensions, required clearances and location and size of each field connection.
▪ Power and control wiring diagram.
▪ System profile analysis including pump curves, system curve, and variable speed pump curves & also Correction curves for Brine to be provided (where applicable).
▪ Pump data sheets - Rated capacities of selected models and indication of pump’s operating point on curves.
▪ Submittals on furnished specialties and accessories.
▪ Submittals must be specific to this project. Generic submittals will not be
accepted i) Hanging and support requirements should follow the
recommendations in the manufacturer’s installation instructions.
OPERATION & MAINTENANCE DATA:
▪ Submit Operation and Maintenance information.
▪ Operation and Maintenance Data: Include installation instructions, assembly views, lubrication instructions, and replacement parts lists.
▪ Under provisions of commissioning documentation; testing of pumps, as well as training of owner’s operation and maintenance personnel may be required in cooperation with the commissioning team from Project Management Team.
DELIVERY STORAGE & HANDLING:
▪ Deliver materials to the site in such a matter as to protect the materials from
shipping and handling damage. Provide materials on factory provided shipping skids and lifting lugs if required for handling. Materials damaged by the elements should be packaged in such a matter that they could withstand short-term exposure to the elements during transportation.
▪ Store materials in clean, dry place and protect from weather and construction
traffic. Handle carefully to avoid damage.
DESIGN CRITERIA:
▪ The pumps shall be long coupled, base mounted, single stage, end suction, vertical split case design, in cast iron bronze fitted construction specifically designed for quiet operation. Suitable standard operations at 225° F and 175 PSIG working pressure or optional operations at up to 250° F and 250 PSIG working pressures. Working pressures shall not be de-rated at temperatures up to 250F. The pump internals shall be capable of being services without disturbing piping connections, electrical motor connections or pump to motor alignment (Refer above paragraph for the areas as specified above) For End Suction Horizontal split case double suction pump sets, similar specs as specified above shall be used.
▪ The pumps shall be composed of three separable components a motor, bearing assembly, and pump end (wet end). The motor shaft shall be connected to the pump shaft via a replaceable flexible coupler.
▪ A bearing assembly shall support the shaft via two heavy-duty regreaseable ball bearings. Bearing assembly shall be replaceable without disturbing the system piping and shall have foot support at the coupling end. Pump bearings shall be regreaseable without removal of the bearings from the bearing assembly. Thermal expansion of the shaft toward the impeller shall be prevented via an inboard thrust bearing.
▪ The bearing assembly shall have a solid SAE1144 steel shaft. A non-ferrous shaft sleeve shall be employed to completely cover the wetted area under the seal.
▪ Pump shall be equipped with an internally flushed mechanical seal assembly installed in an enlarged tapered seal chamber. Application of an internally flushed mechanical seal shall be adequate for seal flushing without requiring external flushing lines. Seal assembly shall have a brass housing, Buna bellows and seat gasket, stainless steel spring, and be of a carbon ceramic design with the carbon face rotating against a stationary ceramic face.
▪ Bearing assembly shaft shall connect to a bronze impeller. Impeller shall be both hydraulically and dynamically balanced to ANSI/HI 1.1-1.5-1994, balance grade G6.3 and keyed to the shaft and secured by a stainless steel locking cap screw or nut.
▪ Pump should be designed to allow for true back pull-out allowing access to the pump’s working components, without disturbing motor or piping, for ease of maintenance.
▪ A center drop-out type coupling, capable of absorbing torsional vibration, shall be employed between the pump and motor. Pumps for variable speed application shall be provided with a suitable coupler sleeve. Coupler shall allow for removal of pump’s wetted end without disturbing pump volute or movement of the pump’s motor and electrical connections. On variable speed applications the coupler sleeve should be constructed of an EPDM material to maximize performance life.
▪ An ANSI and OSHA rated coupler guard shall shield the coupler during operation. Coupler guard shall be dual rated ANSI B15.1, Section 8 and OSHA 1910.219 compliant coupling guard and contain viewing windows for inspection of the coupling. No more than .25 inches of either rotating assembly shall be visible beyond the coupling guard.
▪ Pump volute shall be of a cast iron design for Cooling systems (or cast bronze for domestic water systems) with integrally cast pedestal volute support, rated for 175 PSIG with integral cast iron flanges drilled for 125# ANSI companion flanges. (Optional 250 PSIG working pressures are available and are 250# flange drilled) Volute shall include gauge ports at nozzles, and vent and drain ports.
▪ Motors shall meet scheduled horsepower, speed, voltage, and enclosure design. Pump and motors shall be factory aligned, and shall be realigned after installation by the manufacturer’s representative. Motors shall be non-overloading at any point on the pump curve and shall meet NEMA specifications and conform to the standards outlined in EPACT 92.
▪ Base plate shall be of structural steel or fabricated steel channel configuration fully enclosed at sides and ends, with securely welded cross members and fully open grouting area (for field grouting). The minimum base plate stiffness shall conform to ANSI/HI 1.3.4-1997 for Horizontal Base plate Design standards.
▪ Pump shall be of a maintainable design and for ease of maintenance should use machine fit parts and not press fit components.
▪ The pump(s) vibration limits shall conform to Hydraulic Institute ANSI/HI 1.1-1.5-1994, section 1.4.6.1.1 for recommended acceptable unfiltered field vibration limits for pumps with rolling contact bearings. Pump manufacturer shall be ISO-9001 certified.
▪ The seismic capability of the pump shall allow it to withstand a horizontal load of 0.5g, excluding piping and/or fasteners used to anchor the pump to mounting pads or to the floor, without adversely affecting pump operation.
▪ Each pump shall be factory tested and name-plated before shipment.
▪ Pump shall conform to ANSI/HI 9.6.3.1 standard for Preferred Operating Region (POR) unless otherwise approved by the engineer. The pump NPSH shall confirm to the ANSI/HI 9.6.1-1997 standards for Centrifugal and Vertical Pumps for NPSH Margin.
DESIGN REQUIREMENTS:
The power ratings of the pump motor shall be larger of the following:
The maximum power required by the pump from zero discharge to zero head.
110% of the power required at the duty point. Pumps of a particular category shall be identical and shall be suitable for parallel operation with equal load division. Components of identical pumps shall be interchangeable.
TEST & INSPECTION:
HYDROSTATIC TESTING:
Each pressure casing shall be hydrostatically tested with water at Ambient temperature. The minimum test pressure shall be 1 1/2 times the rated maximum allowable casing pressure. Cooling water jackets shall be hydrostatically tested at 115-psig minimums.
All hydrostatic tests shall be maintained for a minimum period of 30 minutes. Repair any leaks. Certification of test results is required.
PERFORMANCE:
TESTS: STANDARD RUNNING TEST:
▪ Pumps with drivers over 50 hp shall be given a performance test on
water.
▪ Test speeds shall be at the rated speed of the pump, as shown on th
individual pump data sheet.
▪ Certified test curves are required. Curves shall be drawn from the test
data obtained for the purchased pump and shall include, head, efficiency, and BHP recalculated to the proper specific gravity plotted against capacity.
▪ Each pump that is given a performance test shall be checked for
acceptable vibration limits during the factory running and performance test.
▪ Mechanical seals shall be used during the running tests but are not
required for the hydrostatic test.
NPSH Test:
▪ An NPSH test shall be provided when the NPSH available indicated on
the pump data sheet does not exceed the NPSH required by the pump by at least 1 Meter.
▪ Suppression tests shall be carried out in a closed loop as described in
the Standards of the Hydraulic Institute. Alternative methods may be acceptable when mutually agreed prior to placement of the Purchase Order.
MECHANICAL BALANCING:
In addition to static balancing, impeller and balancing drum shall be balanced dynamically at or near the operating speed.
FIELD TESTING:
After Installation, the pumps shall be subjected to testing at site also. If the field performance is found not to meet the requirements regarding vibration and noise as specified, the equipment shall be rectified or replaced by Contractor, at no extra cost to the Clients.
INSTALLATION:
▪ The pumps shall be installed on inertia bases as per the manufacturer recommendations. Competent personnel on a floating foundation shall install the pump sets with suitable vibration isolators.
▪ The bedplate levels and alignment shall be shown to the Consultant representative / Project managers before bolting and grouting the pumps to the foundation.
▪ Pressure gauges and other accessories shall be provided as per the drawings. All fitments for gauges, thermometers and similar items must extend a minimum of 25 mm beyond outside the insulation to minimize the condensation problems.
▪ A Run Test shall be conducted on one pump of each size. The following measurements shall be made during the test.
▪ Discharge Vs. Head
▪ Discharge Vs. Efficiency
▪ Discharge Vs. BHP
▪ Hydraulic test for casing at 1.5 times the design pressure.
▪ Vibration Level
▪ Noise Level
QUALITY ASSURANCE:
The pump manufacturer shall assemble the pumping package. An assembler of pumping systems not actively engaged in the design and construction of centrifugal pumps shall not be considered a pump manufacturer. The manufacturer shall assume “Unit Responsibility” for the complete pumping package. Unit responsibility shall be defined as responsibility for interface and successful operation of all systems components supplied by the pumping system manufacturer.
The local supplier of chilled water variable speed pumping system must have relevant expertise in all aspects of design, application engineering, installation, programming, interfacing, commissioning and after sales service. Supplier must have, as a minimum, commissioned 25 sets of chilled water VSPS in India.
All functions of the variable speed pump control system shall be tested at the factory prior to shipment. This test shall be conducted with motors connected to AFD output and it shall test all inputs, outputs and program execution specific to this application
The manufacturer shall be fully certified by the international standards organization per
ISO 9001. Proof of this certification shall be furnished at the time of submittal.
Bidders shall comply with all sections of this specification relating to package pumping systems. Any deviations from this specification shall be bid as a voluntary alternate clearly defined in writing. If no exceptions are noted, the supplier or contractor shall be bound by these specifications.
MOTORS (HIGH EFFICIENCY 95%):
The motor shall be as per IS: 325 and with class "F" insulation, totally enclosed fan cooled, horizontal induction foot mounted type and rated not to draw starting current more than 6 times normal running current. Fan motors shall be suitable for 415 volts, 50 cycles, 3-phase, squirrel - cage, totally enclosed fan cooled with IP-55 protection. Motor shall be selected for quite operation and the speed of the motor shall not exceed 1400 RPM. Drive to fan shall be provided through belt-drive arrangement. Belts shall of the oil-resistant type. Fan motor shall be suitable for variable speed by variable frequency drive application. . The motor shall be capable of handling the required starting torque of the pumps. Speed of motor shall be compatible with the speed of the pump. The cooling fans shall be directly driven from motor shaft. Motor situated outdoors or exposed to the weather shall be weather protected. Motors shall be enclosed type and shall have dust tight construction with suitable means of breathing and of drainage to prevent accumulation of water from condensation. Drain holes shall exclude bodies greater than 6mm diameter.
All components shall be of adequate mechanical strength and robustness and shall be constructed of metal unless otherwise approved. All motors shall be dynamically balanced.
The enclosure shall be designed to provide an effective sealing between the primary and secondary air circuits. Motor winding shall be vacuum impregnated with heat and moisture resistant varnish glass fiber insulated. Two independent earthing points shall be provided in accordance with IS:3043 on opposite sides of the motor for bolted connection. The cable boxes and termination shall be designed to enable easy disconnection and replacement of cables.
(Motor should be part of scope with manufacturer & should not be supplied separately by ACMV Contractor).
VFD ENCLOSURE PANEL:
Pump sets should be supplied with dedicated Motor isolator with enclosure Panel
The switchboard shall be metal clad, totally enclosed, rigid, floor / Wall mounting, air insulated, extensible cubicle type for use on low voltage power, 400V, 3 phase 4 wire, 50 Hz system.
The equipment shall be designed for operation in high ambient temperature and high humidity tropical atmospheric conditions. Means shall be provided to facilitate ease of inspection, cleaning and repairs for use in installations where continuity of operation is of prime importance.
TYPE AND CONSTRUCTION:
The VFD panel board shall be metal clad, totally enclosed, rigid, compartmentalized design, floor mounting, air insulated, extensible cubicle type for use on medium voltage power, 3 phase 4 wire 50Hz system.
GENERAL CONSTRUCTIONAL FEATURES:
CRCA-14 G / 2mm thick Sheet steel enclosed, indoor floor mounted free standing cubicle type & CNC fabricated.
▪ Made up of the requisite vertical sections modular type which when coupled together shall form continuous switchboards.
▪ Dust, vermin and damp proof and enclosure protection not less than IP 55.
▪ Each feeder/instrument compartment shall be provided with a hinged door interlocked with MCCB/Load Break Switch inside the compartment such that door can only be opened when MCCB is in off position.
▪ Readily extendable on either sides by the addition of vertical sections after removal of the end covers.
▪ Switchboards shall have access to the feeders, bus bars, cable termination, cable alley, etc. as required.
▪ Doors shall be of minimum 2mm thick sheet steel and covers/partitions of 1.6mm thick sheet steel, gland plate shall be 3mm thick sheet steel. All sheet steel work forming the exterior of switchboards shall be smoothly finished, levelled and free from flaws. The corners should be rounded.
METAL TREATMENT FINISH:
▪ After fabrication the panel shall under go 7 tank treatment/sand blasting for removing grease, Rust etc..
▪ The panel shall be coated with zinc chromate primer(Applicable for outdoor panels).
▪ After coating of primer, the panel shall be coated with Epoxy based paint (powder coating/spray paint). Paint shade shall be as specified by the client/consultant during drawing approval.
METERS:
All instruments and meters shall be enclosed in dust proof, moisture resistant, black finished cases and shall be suitable for tropical use. They shall be calibrated to read directly the primary quantities. They shall be accurately adjusted and calibrated at Works and shall have means of calibration, check and adjustment at site.
Indicating instruments shall be flush mounted, digital type. The size of all instruments shall be 96mm x 96 mm.
The Ammeter and Wattmeter current coils shall withstand 200% of rated current continuously and 10 times the rated current for 0.5 seconds without loss of accuracy. Voltmeter and Wattmeter potential coils shall withstand 120% of rated voltage continuously and twice the rated voltage for 0.5 sec. without loss of accuracy.
DIGITAL VOLTMETERS:
▪ Voltmeter shall be of Digital type with accuracy class of 1.
▪ All Voltmeters are 96sq.mm in size & suitable for flush mounting on panels.
DIGITAL AMMETERS:
▪ Ammeter shall be of Digital type with accuracy class of 1.
▪ Ammeter shall be CT operated (5A) with a dial marked for line currents.
▪ Ammeter are 96sq.mm in size & suitable for flush mounting on panels.
▪ Type, Sl.No., Accuracy class, Operating Current, Burden etc., shall be indicated on the meters.
INDICATING LAMPS:
All indicating lamps shall be of LED type & 22.5m dia in size. Indicating lamps shall be suitable for panel mounting with screw connections on backside.
TECHNICAL REQUIREMENTS OF CHILLED WATER PUMPSET
|S.NO |DESCRIPTION |TECHNICAL DETAILS BY VENDOR |
|1 |Application | |
|2 |Make | |
|3 |Model | |
|4 |Type of pump | |
|5 |Design Capacity | |
|6 |Head | |
|7 |Pump Efficiency | |
|8 |Motor Efficiency at duty point | |
|9 |Motor Rating | |
|10 |Rated Speed | |
|11 |Material of construction as per | |
| |specification indicate deviations | |
|12 |Impeller type-refer Boq | |
|13 |Is logic control panel compatible to hook up | |
| |to BMS System? If so necessary hard ware & | |
| |software included in scope of work? What is | |
| |the protocol considered for | |
| |Integration? Is it suitable for | |
| |Outdoor Installation | |
|14 |Is variable frequency drives | |
| |considered is as per the Models specified in| |
| |the document ie., HVAC Series | |
|15 |Inertia Blocks with Spring Isolators included | |
| |under the part of scope? | |
|16 |Pump Weight – Dynamic Weight | |
|17 |Is Suction Guide considered for the pumpsets | |
| |as per specifications? | |
|18 |Maximum Pump power required | |
|19 |NPSH | |
|20 |Noise level of Pump @ 1.5 Mtr Distance | |
|21 |Motor starter panel as per specification has | |
| |it been considered? | |
|22 |Mechanical seal | |
DATA TO BE FURNISHED BY THE CONTRACTOR AFTER AWARD OF CONTRACT
▪ Quality Assurance Plan (QAP).
▪ Dimensioned general arrangement drawing of pumps and driver.
▪ Foundation drawing of pump and driver with static and dynamic loads, details of fixing, grouting and all relevant data required for design of foundation.
▪ Cross-sectional drawings of the pump with complete part list, material of construction and relevant standards for each part.
▪ Pump performance curves flow rate Vs head, BKW, efficiency, NPSHR from zero flow to maximum flow and torque-speed curve.
▪ Scheme for pump sealing, lubrication and cooling.
▪ Driver dimensional drawing.
▪ Surface preparation and painting procedures.
▪ Catalogues, data sheets and drawings for instruments.
▪ Installation, operation and maintenance manual.
VARIABLE FREQUENCY DRIVE
|1 |Product type |Dedicated HVAC Engineered design. General purpose products are not acceptable |
|2 |Manufacturer |Shall have minimum 20 years experience in design and manufacturing VFDs. Brand |
| | |labelled drives not accepted. |
|3 |Certification |UL, CE, C tick |
|4 |VFD Design requirements: |
|4.1 |Voltage variations |380-480 V + 10% |
|4.2 |Nominal supply frequency |50 Hz + 5% |
|4.3 |True Power Factor (λ) |> 0.9 at nominal rated load |
|4.4 |Displacement P.F. (cos φ) |> 0.98 |
|4.5 |Harmonic current control |5% non-saturating dual reactors on both rails of DC bus. Swinging chokes which |
| | |do not provide full harmonic filtering throughout the entire load range are not|
| | |acceptable. VFDs with saturating (non linear) DC reactors to provide additional|
| | |3% AC chokes. |
|4.6 |EMC Compliance (for emission and immunity) |For powers ≤90 kW : Shall comply with requirements of IEC 61800-3 : 2004, |
| | |Category C1 with 50m motor cable. |
| | |For powers >90 kW : Shall comply with requirements of IEC 61800-3 :2004, |
| | |Category C2 with 50m motor cable. |
|4.7 |VFD rated continuous output current |Meet or exceed the normal rated currents of standard IEC induction motors |
|4.8 |Torque mode |Variable torque. Not programmable in constant torque mode for variable torque |
| | |fan and pump applications |
|4.9 |Torque ratings |Starting torque : Min 120% for 0.5 seconds |
| | |Overload torque : 110% for 1 minute |
|4.10 |Cable lengths |Upto 150 m for screened / armoured cable |
| | |Upto 300 m for unscreened / armoured cable |
|4.11 |Cable type |To allow for SWA (Single Wire Armour) cable & MICS (Mineral Insulated Copper |
| | |Sheath) cable in the motor circuit. |
|4.12 |V/f ratio |Dynamically varying; fixed V/f curves not acceptable. The factory default |
| | |programming for this function shall be dynamic V/f. |
|4.13 |Energy optimization function |Automatic energy optimization algorithm which continuously adjusts the applied |
| | |voltage based on load and speed as factory default programming. |
|4.14 |Output power switching |Without any interlocks and damage to VFD |
|4.15 |Motor tuning function |Automatic, without having to decouple the load and motor. |
|4.16 |Signal Isolation |Galvanic Isolation between power and control circuitry |
|4.17 |Motor noise reduction |Adjustable carrier frequency modulation. VFDs with fixed switching frequency |
| | |not acceptable |
|4.18 |Ramp time |Programmable from 1 to 3,600 seconds |
|5 |Service Conditions: |
|5.1 |Ambient temperature with full VFD rated output |a) For powers ≤90 kW : 45 0C without derating b) |
| |current: |For powers >90 kW : 40 0C without derating |
|5.2 |Relative Humidity |0 to 95%. non condensing |
|5.3 |Max. altitude above sea level |Upto 1000m without derating |
|5.4 |AC line voltage variation |+ 10% of nominal with full output |
|5.5 |VFD enclosure protection |Minimum IP 54 without any secondary or additional enclosures |
|5.6 |Aggressive environment |To offer circuit boards as per Class 3C2 |
|5.7 |Vibration |1.0 g |
|5.8 |Input disconnect switch |To be made available on the VFD enclosure itself. |
|6 |Protective features: |
|6.1 |Motor overload protection |Class 20 I2t electronic motor overload protection with automatic compensation |
| | |for changes in motor speed. |
|6.2 |Protective functions |Against input transients, loss of AC line phase, output short circuit, output |
| | |ground fault, over voltage, under voltage, VFD over temperature and motor over |
| | |temperature. |
|6.3 |Function at input phase loss |Auto derate and warning. Should cause no damage to VFD |
|6.4 |Function at over temperature |Automatically reduce carrier frequency or auto derate. |
|6.5 |Function at over load |Automatically reduce output current to a pre-programmed value |
|6.6 |Alarm log |Record last 10 alarms with description of alarm, date & time. |
|6.7 |Dry pump detection |Automatically detect and trip during a dry running situation or no flow |
| | |condition, when used in pumping application |
|6.8 |End of curve protection |Detect and display a warning or trip when encountering an end of curve |
| | |situation, when used in pumping application |
|7 |Interface Features: |
|7.1 |Customer interface |Identical interface for full range of VFDs in a project. |
|7.2 |Display type |Graphical, alphanumeric, 6 line, back lit |
|7.3 |Auto – Manual operation |Control panel to have inbuilt Hand – Off – Auto Keys |
|7.4 |Programming assistance key |Key for displaying on-line context sensitive assistance for programming and |
| | |troubleshooting. |
|7.5 |Protection against unauthorized access |2 level password protection for read & write to prevent unauthorized access. |
|7.6 |Parameter up load / down load |Control panel with program up load / down load function and also size / rating |
| | |independent parameters. |
|7.9 |Language required |English |
|7.10 |Indicating lamps |Red FAULT light, yellow WARNING light and a green POWER-ON light. |
|8 |HVAC Features : | |
|8.1 |Quick set up menu |Menu with factory preset typical HVAC parameters |
|8.2 |HVAC application menus |Fan, Pump, and Compressor menus specifically designed to facilitate start-up |
| | |of these applications. |
|8.3 |Speed control using 3 feedback signals |A three-feedback PID controller to control the speed of the VFD. |
|8.4 |3 – zone control |Sum, difference, average, compare to common set point or compare to individual|
| | |set point and select min. or max. deviating signal |
|8.5 |Square root function of feedback signal |Calculate the square root of any / all individual feedback signals so that a |
| | |pressure sensor can be used to measure air flow |
|8.6 |PI programming |Auto tuning PI controller to facilitate faster commissioning |
|8.7 |Installation of pressure sensor near to output of |Actively adjust its set point based on flow, to facilitate such installation |
| |pump. | |
|8.9 |Independent PID controllers |Three nos. additional PID controllers to control damper and valve positioners |
| | |in the system and to provide set point reset |
|8.10 |Floating point control interface |To increase/decrease speed in response to contact closures. |
|8.11 |Meter displays |5 simultaneous meter displays on LCP |
|8.12 |Display of feedback signals and set points |Display all connected feedback signals and its set points, in their own engg. |
| | |units (e.g. : bar / 0C etc.) |
|8.13 |Sleep mode |Programmable and be able to stop the VFD in the following situations: a) |
| | |Output frequency drops below set “sleep” level for a specified time, b) |
| | |External contact commands that the VFD go into Sleep Mode, or c) Detects a |
| | |no-flow situation. |
|8.14 |Run permissive circuit |Receive a “system ready” signal before starting and also be capable of |
| | |initiating an output “run request” signal to the external equipment. |
|8.15 |Loss of load detection |Monitor a broken belt / loose coupling and indicate via key pad warning, relay|
| | |output or serial communication. This function shall be based on torque and |
| | |shall have a proof timer. |
|8.16 |Real time clock |Integral feature and shall be capable of: |
| | |Display current date & time on control panel |
| | |Start / stop, change speed depending on time |
| | |Time stamp all faults |
| | |Program maintenance reminders based on time |
|8.17 |Energy log |Function to monitor energy consumption pattern over programmable hours, days &|
| | |weeks |
|8.18 |Load profile |Store a load profile to assist in analyzing system demand and energy |
| | |consumption |
|8.19 |Sequential logic controller |To perform logic functions which has logic operators, comparators and timer |
| | |functions. |
|8.20 |Cascade controller for multiple motors |To control one variable speed motor and 2 fixed speed motors. Software to have|
| | |full functionality and not just on / off. |
|8.21 |Automatic restart |To automatically restart on receiving power after a power failure. |
|8.22 |Adjustable ramp time |To avoid nuisance tripping, automatically adjust the ramp times. |
|8.23 |Catching a spinning fan |To have a flying start function to effectively control an already spinning fan|
| | |– in both forward and reverse direction |
|8.24 |Programmable current limit |Programmable for site / application requirement. Shall be able to program for |
| | |trip after an adjustable time. |
|8.25 |Start Delay |A programmable start delay shall be provided. |
|8.26 |Critical frequency lock out |Semi automatic setting of lock out range. |
| | |4 such lock out ranges to be provided |
|9 |Inputs and Outputs |
|9.1 |I/Os required |4 DI; 2 DO; |
| | |2 relay outputs - of min 240V AC, 2 A; |
| | |2 AI programmable for both 0-10V & 4-20 mA inputs; |
| | |1 AO of 4-20 mA |
|9.2 |Optional I/O modules & Special I/O requirement |In addition to 9.1, the drive shall be offered with the necessary I/Os as |
| | |required for the control strategies for various applications as mentioned in |
| | |this document. |
|9.3 |Display of analog signal |The Local Control Panel to display each analog signal in its engg. units for |
| | |trouble shooting & setup. |
|9.4 |Serial com interface for AI/DI |Capable of reading the status of all analog and digital inputs of the VFD |
| | |through serial bus communications |
|9.5 |Serial com interface for AO/DO |Capable to command all digital and analog outputs (including options) through |
| | |the serial communication bus |
|9.7 |Fire over ride mode |On receipt of a digital fire input, override all other local or remote |
| | |commands, ignore most normal safety circuits including motor overload, display|
| | |FIREMODE, select forward or reverse operation and speed source or preset |
| | |speed. |
|10 |Serial Communications | |
|10.1 |Serial Com Port |EIA-485 (RS 485) |
|10.2 |Standard serial com protocols |Modbus RTU, Johnson Controls Metasys N2 |
|10.3 |Protocol options |Bacnet MS/TP, Lonworks, Profibus, Devicenet |
|10.4 |Connection to Personal Computer |Using USB port |
|10.5 |Communication in case of power failure to VFD |Facility to provide optional 24 V DC back up power interface for keeping the |
| | |controls section powered to keep communication to BMS |
11. Harmonic distortion calculation:
The VFD supplier shall provide details of all harmonic currents up to and including the 40th when operating at full load and provide an estimation of the total harmonic voltage distortion resulting at the point(s) of common coupling due to the installation of all the VSDs on the project. Details of the loads, supply transformer, impedances, cable sizes and lengths and other relevant supply network data will be supplied to enable this calculation to be made. If this estimation concludes the total harmonic voltage distortion is expected to be above the value prescribed by the electricity distributor / international standards like IEEE 519, the VFD supplier shall propose additional passive or active advanced harmonic filters to reduce the harmonic distortion to within the value prescribed by the electricity distributor / standards. In such cases they shall include the cost of such advanced harmonic reduction as a separate section in their offer itself. A harmonic distortion report shall be submitted by the VFD manufacturer to support the calculated distortion and advanced filter offer.
|12 | Primary Chilled Water Pump Control with VFD |
|12.1 |The VFD shall be used to control the Primary Chilled Water Pump (PCHWP) as follows. |
|S.No. |DESCRIPTION |Signal Type |Control Description |
|1 |PCHWP On / Off Command from BMS |Serial communications through |VFD in auto mode gets start / stop command from BMS over |
| | |modbus RTU |standard serial com protocol |
|2 |PCHWP On / Off Command from Local control | |In Manual mode, the VFD accepts start command from its local |
| |panel | |control panel ON/OFF buttons |
|3 |PCHWP On / Off / Trip status |Serial communications through |The status of PCHWP is transferred to BMS over standard |
| | |modbus RTU |serial com |
|4 |PCHWP Auto / Manual Status |Serial communications through |The status for PCHWP is transferred to BMS over standard |
| | |modbus RTU |serial com |
|5 |PCHWP speed modulation |If system is without flow meter|The speed of the PCHWP is permanently set at the value which |
| | | |gives design flow through the chiller. |
| | |If system is with flowmeter |Connect the flowmeter signal to VFD’s AI and control the speed|
| | | |in closed loop using PID loop-1 to maintain the design flow |
| | | |set point. |
|6 |PCHWP dry pump protection |VFD inbuilt function |Program the VFD to trip by activating the dry pump protection|
| | | |in case dry running of the pump is detected. |
|7 |Flow signal to BMS |VFD inbuilt function |Transfer the dry pump signal to the BMS through serial |
| | | |communication instead of using a flow switch. |
|8 |End of curve protection |VFD inbuilt function |Trip the pump VFD in case end of curve running is detected. |
|9 |Parameters to be displayed on VFD control | |Flow in GPM, Pump speed in RPM, Power consumed in kW, Pump |
| |panel | |running time in hours and Speed set point in RPM. |
3. PIPING WORKS AND RELATED VALVES
GENERAL:
The Contractor on the Award of the work shall design the piping installation and prepare detailed working drawings, showing the cross-section longitudinal sections, detail off fittings, location of isolating drain and air valves, instruments etc., for approval of the Employer. Care shall be taken to provide expansion or contraction due to temperature changes. Work shall be started only after the drawings have been approved in writing by the Employer. Proper additional precautions shall be taken, as directed by Employer for vibration isolation of piping, passing through sensitive areas.
SCOPE OF SUPPLY AND ERECTION
The CONTRACTOR shall supply all piping materials like pipe, fittings, flanges (along with gasket, Galvanized Bolts, Galvanized nuts), pipe supports, anti corrosive treatment, paints and any other items required for the proper functioning of the system. Supports shall include all accessories like U Bolts, clamps, rods etc., and all steel structure required for proper supporting of the pipe.
CONTRACTOR shall supply all necessary drains and vents as required for the safe and effective draining / venting of piping systems. It must be noted that the flow diagram / piping layouts may not indicate all drains / vents that would be required. It shall be the responsibility of the CONTRACTOR to provide all required vents / drains for the proper operation of the systems. The drains shall be led up to the nearest floor drain.
Manual air vents shall be installed at all high sections of piping as well as in the AHU Cooling coil connection. All air vents shall have an isolating valve of equal size. The discharge from these air vents shall be piped to the nearest waste drain point. The vent size shall be as follows:-
Upto ND 150 pipe Size 15 mm size
Above ND 150 pipe size 25 mm size
The CONTRACTOR shall install primary elements for flow measurements, control valves and on-line metering equipment and any other instruments /sensors required by ACMV system or BMS System.
All piping shall be internally cleaned and flushed by CONTRACTOR before and after erection in a manner suited to the service as directed by the PURCHASER. For flushing as well as temporary blow out, all primary elements such as orifice plates, flow nozzle pipe assemblies shall be removed. Flow nozzle pipe assembly shall be replaced by suitable spool piece and orifice plates by suitable dummy plates. Both spool piece and dummy plates shall be furnished by the CONTRACTOR for on-line instruments which have no bypass shall be replaced by suitable spool pieces while flushing and / or blowout. These spool pieces shall be furnished by the CONTRACTOR. In addition if certain valves / specialties are not available during testing / commissioning stage, CONTRACTOR shall provide suitable spool pieces and replace the same with valves / specialties when they are available.
The CONTRACTOR shall hydrostatically test the entire piping system including valves
and specialties. For hydrostatic testing and water flushing, the CONTRACTOR shall furnish necessary pumps, equipment and instruments, piping etc., The PURCHASER will provide water at available points (REFER GENERAL CONDITIONS – IF NOT; GENERAL CONDITIONS SUPERCEEDS ABOVE STATEMENT) of supply to which the CONTRACTOR’s temporary piping will be connected.
MATERIAL AND OTHER SPECIFICATION
The material and other specification for piping, valves and specialties shall be as per Data Sheet listed under the end of this section.
Colour code shall be used to identify pipe material. The CONTRACTOR shall be able to identify on request all random piping prior to any field fabrication.
The VENDOR shall furnish six (6) copies of certificates for piping for:-
▪ Dimensions and Hydrostatic test
▪ Material test certificates
WELDING
The VENDOR’s scope under this includes the following:-Welding materials like welding electrodes (Advani / Esab), gas rods, oxygen, acetylene, propane and other consumable materials and backing rings etc., as required.
Jointing material as required for all screw joints. Fasteners ( bolts, nuts, stud washers etc., Should be Galvanized MS ) and gaskets is required for all flanged joints.
Services of erection superintendents, erection superiors, fitters, riggers, other skilled and unskilled labour.
Erection tools, tackles and material, including welding machines.
All fusion welding shall be done with direct current electricity using the metallic arc process with coated electrodes of a type suitable for respective kinds of material. Where the CONTRACTOR desires to use alternating current shielded metal arc welding, he shall submit his procedure to PURCHASER for approval.
WELDING PROCESS Unless otherwise noted, for all carbon steel piping systems the entire welding including root pass may be carried out by Manual metal arc welding only.
PROCEDURE QUALIFICATIONS
No production welding shall be undertaken until the procedure qualifications testes which are to be used have been established as per ASME Boiler and Pressure Vessel Code – Section IX. Test results and specimens from qualification tests of the welding process and welding operators shall be made available to the PURCHASER / ENGINEERS / INSPECTOR for approval.
For purposes of identification and to enable tracing full history of each joint, each welder employed on the work shall be given a designation. The welder’s designation and the date on which the joint was made, shall be stamped / marked on the relevant piping/ drawings so marked shall be furnished to the PURCHASER / ENGINEER for record purposes.
PREPARATION OF WELD ENDS
Surfaces to be welded shall be smooth, uniform and free from fins, tears and other defects which would adversely affect the quality of the weld. All welding faces and adjoining surfaces shall be thoroughly cleaned of rust, scale, paint, oil or grease both inside and outside upto a distance of at least 150 mm from the edge of welding groove or 12 mm from the toe of the fillet in the case of socket welded or fillet welded joints.
Unless otherwise specified, joints for carbon steel pipe, 50 mm NPS and smaller, shall be socket welding type as per ANSI B 16.11 and for pipes, 65 mm NPS and larger shall be of the butt-welding type as per ANSI B 16.25. All Butt welds shall be full penetration welds. For stainless steel piping all joints shall be butt welded. Stainless steel pipe lines shaving nominal wall thickness 3mm and less shall have ends cut square or slightly chamfered. “ Mirror Technique” shall be adopted for joining of HDPE pipelines. For PVC pipe lines either solvent method / hot welding or both shall be adopted.
WELDING OF PIPES
Gouging or back gouging of butt welds may be carried out where feasible by grinding, chipping, machining or other approved methods, but the surface of the cut must be cleaned to remove any carbon or oxidized metal before commencing the welding.
The maximum face width of any manual arc or inert gas welding run shall be20 mm
No single run horizontal-vertical position manual metallic arc weld filled shall exceed 8 mm in size. The arc shall be struck only on those parts of parent metal where weld metal is to be deposited.
No welding or welded parts shall be painted, plated, galvanized or heat until inspected and inspected and approved by the PURCHASER / ENGINEER.
After deposition, each layer of weld metal shall be cleaned with a wire brush to remove all slag, scale and defects, to prepare for the proper deposition of the next layer. In case where the weld joint on pipes 100 mm NB and larger has to be radiographer as per the requirements of this specification, it is recommended that the root run be checked by liquid penetrant or magnetic particle procedures.
Irrespective of the class of steel, root runs shall be made without interruption other than for changing the electrodes or to allow the welder to reposition himself. Root runs made in the shop may afterwards be allowed to cool by taking suitable precautions to ensure slow cooling. Welds made at site shall not be allowed to cool until the thickness of weld deposited exceeds tone third of final weld thickness or 10 mm, whichever is greater. Also no welding shall be done when the ambient temperature is less than 10 deg C. If the welding is unavoidable, then the CONTRACTOR shall meet the preheating requirement after discussion with site engineer.
ELECTRODES
The specification and size of the electrodes voltages and amperages, thickness of beads and number of passes shall be specified in the approved welding procedure or otherwise agreed in writing. In general, coated electrodes shall be used, which deposit weld will metal having the same or higher physical properties and similar chemical composition to the members being joined.
All electrodes to be used on carbon steel shall conform to ASME boiler and Pressure Vessel Codes Sec II part C or IS 814 or any other equivalent code.
INSPECTIONS
This includes inspection and testing welding at all stages of fabrications and erection.10 % of Radiography is allowed for testing, it should be attached to the measurement of piping.
HANGER AND SUPPORTS
All piping supports, guides, anchors, rod hangers, rollers, with incidental structural sub-framing shall be furnished and erected by the CONTRACTOR.
The fabrication of the hangers, anchors and materials shall conform to the requirements of MSS-SP-58 or PURCHASER’S specification unless otherwise noted. The provision of pipe support will include auxiliary steel or concrete pedestals wherever applicable. The CONTRACTOR shall be responsible for the design of hangers, supports etc., for the complete piping system. However, CONTRACTOR shall obtain ENGINEER’s / PURCHASER’s approval before fabrication and erection of these supports.
All piping shall be suspended, guided and anchored with due regard to general requirements and to avoid interference with other pipes, hangers, electrical conduits and their supports, ducts, and structural members. It is the responsibility of the piping CONTRACTOR to avoid all interference while locating hangers and supports.
Hangers rods on all pipe lines shall not be less than 12 mm (3/8”) to support pipes.
Parameter Valve
Welding Process Electric Arc welding
Type Manual
Application Chilled brine/water piping, condenser water piping
Groove Design Single ‘V’
Size of Electrode Filler 11.5 mm to 4.0mm
Type of Electrode J.B. Advani Overcord ‘S’, Philips ‘2S’
Size of Electrode filler 11.5mm - 4.0mm
Pre-heat Not required
Post weld heating Not required
Welding technique Root, filling and capping weaving
Welding progression Vertical Upward.
Pipe installation shall be carried out in a workman like manner with approved drawings, which shows the locations of equipment, valves, drains and air-vents. Pipe hangers shall be spaced as follows:- (unless otherwise stated in the drawings)
|Nominal pipe size mm - dia |Spacing (meters) |Hanger Rod size |
| 12 & 15 |1.25 |9mm |
| 20 & 25 |1.50 |9mm |
| 32, 40, 50 & 65 |2.00 |12mm |
|80, 100 & 125 |2.00 |15mm |
|150 & above |2.50 |20mm |
SURFACE PREPARATION AND PAINTING
All pipelines and piping components shall be adequately protected against corrosion during manufacture, shipment and storage by appropriate protective paint. Use of grease or oil for this purpose is prohibited. After completion of cleaning and testing operations at site, completed pipe work, hanger and support components shall be give n a coat of primer as follows:
Before the applications of paint, the CONTRACTOR shall prepare all surfaces. The surfaces shall be cleaned of all mill scale, dirt, dust, soot, grease, rust etc., and of all substances which would damage the coating or impair its adhesion. Existing coating shall be removed thoroughly for satisfactory painting. Spools which are already corrosive shall be completely derusted and repaired as necessary before the application of paint.
Immediately after the surface cleaning, the CONTRACTOR shall give two coats of red oxide zinc chromate primer (confirming to IS 2074) with minimum Dry Film Thickness (DFT) of 25 microns per coat. The Contractor shall test the coating executed by him as regards to their satisfactory adhesion. Painting operations shall generally be in line with IS 1477 part II.
In addition to above all pipes other than galvanized or insulated pipes and pipe supports shall be given two coats of finish paints using enamel paint of approve make by brushing or spraying generally as per IS 1477 to give a minimum total DFT of 100 microns (after two coats of primer and two coats of finish paint). Shades shall be as per IS 5 or as indicated by PURCHASER. Paint manufacturer’s instruction for primer or finish paint shall also be followed. Before selection of colour code, PURCHASER’S / ENGINEER’s approval shall b obtained.
SURFACE PREPARATION
Pipe surfaces to be provided with underground protection shall be cleaned by shot or sand blasting. The cleaning shall e so carried out that the piping surface is free from mill scale, rust, oil, welding scale and other foreign materials. Primer shall be applied immediately after shot or sand blasting to prevent rust forming. Superficial rust formed shall be removed by wire brushing or by the use of emery paper. If the rust formation is heavy, reblasting may be necessary. Around field joints, the pipe surfaces may be cleaned by wire brushing prior to the application of anti-corrosive protection.
BUTTERFLY VALVES (SUITABLE FOR BRINE APPLICATION)
Butterfly valves shall be of slim seal WITH EXTENDED STEM OF 125MM, short wafer type with standard finish. The valves shall be suitable for mounting between flanges drilled to ANSI 125. The valve body shall be cast iron. The disc shall consist of disc pivot and driving stem. The disc shall move in bearings on both ends with ‘O’ Ring to prevent leakage. The seat shall be moulded black nitrile rubber or nylon. The valves shall be suitable for a working pressure of 16.5 kg/scm and shall be complete with flow control lever and notches, factory machined companion flanges, bolts & nuts.
AUTOMATIC AIR VENTS -In addition to the manual air vents described above, automatic air vents of size 25 mm shall b placed at the top of the chilled water riser piping in the building. Operation of Automatic air vent: The float of the air vent keeps the venting valve closed. When air is collected inside the float chamber, the water level inside the vent valve decreases and the venting valve is opened. The collected air escapes through the venting valve and the water level inside the vent valve increases again, which in turn results in the closing of the venting valve. The process is a continuous one as long as air is collected in the vent valve. The air cushion in the upper part of each vent valve protects the venting valve against corrosion. When the pressure inside the system decreases below the ambient pressure, for instance during draining of the system, the air vent acts as a vacuum breaker, and lets air into the system. Drain pipe with isolation valve shall be installed at the lowest point of the AHU cooling coil, at the bottom of each chilled water rise pipe, and at all the other system low points. The discharge from these drain valves shall be piped to the nearest waste drain point. The drain size shall be as follows Upto ND 150 pipe size: 15mmsize Above ND 150 pipe size: 25mmsize.
BALL VALVES (SUITABLE FOR BRINE APPLICATION)
Ball valves shall have body of carbon steel. The ball and the shaft shall be of stainless steel. The seat shall be of PTFE. The valve shall be complete with socket weld ends. Pressure rating shall be 16.5 kg/sqcm
CHECK VALVES
Swing check valves shall normally be used in all water services. Life type valves may
be used in horizontal runs. All release and clean out plugs shall be provided and valves
shall be suitable for 21 Kg/sq.cm test pressure. Check valves shall be of non-slamming type to prevent water hammor either by providing springs or accumulators. Valves shall be suitable for 15 Kg/cm2 operating pressure. All check valves must be only vertical type.
STRAINERS
“Y” strainers up to 50 mm shall be of gunmetal and above 50 mm shall be of cast iron body. Strainers shall incorporate a removable bronze screen with 3mm perforations and a permanent magnet. Strainers shall be provided with flanges at both inlet and outlet of the chilled water pumpset. They shall be designed to enable blowing out the accumulated dirt and facilitate removal / replacement of screen without disconnecting the main pipe. The strainer shall be suitable for 16.5 Kg/sqcm test pressure.
FLANGES & UNIONS
Sufficient number of flanges and unions shall be provided as required to facilitate the maintenance work after the piping is installed. Mild steel ANSI 125 flanges shall be used for pipes of 65mm dia and above.
PRESSURE/TEMPERATURE GAUGES (ALL SS TYPE)
Pressure gauges shall be not less than 100 mm dia. They shall be selected for appropriate range and shall be complete with siphon and cock, etc. Temperature gauge complete with thermo well Pressure gauges shall be provided as shown in the drawings & as per price schedule.
BALANCING VALVES
Balancing valves shall be supplied and installed as shown on the drawings to ensure proper balancing of water flows in the hydraulic heating and cooling system.
Flow measurement and balancing shall be possible with an accuracy of 4 to 7% in the normal measuring range of the valves. (When valve opening position is more than 50%)
Pressure measuring nipples shall be provided for measuring differential pressure and be integral with the body and incorporate a means for shutoff when normal use.
Adjustment and presetting of flows shall be made with a digital hand wheel.
The setting shall be lockable with a mechanical stop to allow the valve to be closed but not opened further than to the present value.
For valves in size 10 to 50 mm the balancing valves shall offer a facility for draining of water with a separate hose connection and a stop valve. The optional draining facility shall be capable of being mounted on or removed from the balancing valve without interruption to the system operation.
MATERIAL AND PRESSURE RATINGS
Balancing valves with thread connections in sizes from 10 to 50 mm shall be made in a dezincification resistant copper alloy with Brinell hardness of atleast 130 and a body pressure rating of at least 20 bar (300 psi) at 150 degrees C (A - Metal).
Balancing Valves with flange connection from 20 to 300 mm shall be made in cast iron for a body pressure rating at least 16 bar – 25 bar 150 degrees C. Valves sized 65 mm – 300 mm shall to be fitted with a pressure balanced cone to reduce closing to que to allow the valve to be closed and opened easily.
Balancing valves shall be sized to operate in a normal measuring range of 50% to 100% of full opening to ensure maximum accuracy.
All balancing valves shall be manufactured in accordance IS09001.
Certificate of Origin and Certificate of Quality from factory shall be submitted for inspection when the balancing valves are delivered to site before installation.
Installation of balancing valves without the specified certificates shall not be permitted.
A computerized balancing instrument (CBI) with ISO 9000 calibration certificate shall be handed over after testing and commissioning.
To enable accurate and practical operation, measurement of flow and differential pressure shall be made with a microprocessor instrument which shall enable the operator to read the flow directly without the use of diagrams or tables.
The balancing of the system shall be verified in a written report, documenting valve position and water flow which shall be handed over to the consultant for approval and acceptance.
CBI SHALL HAVE TWO MAIN COMPONENTS
▪ An instrument which contain a micro computer, input touch pad and LCD display, and rechargeable batteries and built-in-charger.
▪ An sensor unit which contain a piezo-resistant pressure sensor, one measurement valve and connection hoses. The measurement valve shall have a safety function which protects the sensor from high differential pressures.
In addition to measuring flow rate, differential pressure and temperature, the CBI shall have a computer programme to provide following functions:-
To balance the installation of HVAC system and calculate the necessary valve
setting, based on the system measurements.
To store the result of balancing.
To log measured values from a valve (differential pressure, flow rate or temperature)
To printout saved data in computerized measurement protocol (CMP) consisting of:-
▪ Name and size of Balancing Valve (BV)
▪ Presetting position of BV
▪ Dp at BV
▪ Flow at BV
▪ Design flow
DATA SHEET FOR PIPING AND SPECIALITES PIPING MATERIAL SPECIFICATION
|ITEM |
|TYPE OF |SIZE RANGE (NB) |MATERIAL |PRESSURE RATING |TYPE OF END |REMARKS |
|VALVE | | |ANSI-kg/sqcm |CONNECTION | |
|1. |Squirrel Cage |Upto 7.5 |D.O.L |5.0 F.L |1.2 F.L |
|2. |Induction |9.0 to 30 |Star/delta |2.0 F.L |0.4 F.L |
where the load torque calls for a higher starting torque, (essentially for compressor drive and centrifugal fan drive) the contractor may provide the appropriate type of motor required to meet the load torque.
▪ Starters for Sq. cage induction motors shall conform to IS 1822 - 1961 and be the totally enclosed metal clad, dust proof, air enclosed type. The starter shall be suitable for the specified supply system and the ambient conditions.
▪ Semi hermatic compressors cooled by Refrigerant shall be started with part wind starter.
▪ Starters shall be complete with the following protection.
i. Thermal overload on all the three phases with adjustable settings.
ii. Under voltage protection.
III L & T - ES - 100 / EE Single phase preventors. (These shall be provided separately in the panel as part of Electrical Work for all Starters of centralised AC system and only for compressors in Packaged Air conditioners.
IV Sufficient extra contacts shall be provided for interlocks,
indicating lamps etc.
▪ Starters for motors of 11.0 kw and above shall be provided with ammeters with CTs wherever required
INSULATION FOR MOTORS:
▪ All motors shall be provided with two separate earth connections. Size of copper earth shall be equal to the size suitable for the supply conductor but not less than No. 8 copper.
▪ Flexible connections shall be provided to all motor wherever the motor is mounted on slide rails and belt drive is adopted. Even in the case of direct drive the connections shall be flexible enough to prevent transmission of vibration. (Adequate slack to be provided).
TESTING OF MOTORS (HIGH EFFICIENCY ABOVE 95%):
▪ Motors shall be tested in accordance with the relevant Indian Standard Specifications and test certificates furnished for routine, type and high voltage tests.
▪ Induction motor upto 37 KW shall be directly tested with 500 volts D.C meggar for one minute. If the insulation resistance is less than two meg ohms, the motor shall be dried out till a steady I.R. value of not less than two meg ohms is achieved.
ELECTRICAL WORKS:
The equipment schedule calls for electrical work under the following heads.
▪ Motors and matching starters these shall be offered under the respective heads where called for.
▪ Switch boards for Air-conditioning/ventilation system
▪ Electrical power wiring from switch board to individual motors and other equipment.
▪ Control circuit wiring from switch board to individual motors and other equipment.
▪ Earthing stations and loop earthing of the equipment.
Note: Item (b) above is detailed with a starter. It is however clearly understood that this starter and ancillaries are the same as called for in (a) above and no duplicaiton of these items, is to be made. Item (c), (d) and (e) - the electrical scope of work shall include for wiring of all controls, interlocks, cabling, earthing etc. upto obtaining electrical inspectorate approval and all similar formalities.
GENERAL:
▪ Unless otherwise specified in the tender specification the entire equipment shall be suitable for operating on 400 Volts / 230 Volts, 50 Hz, earthed neutral, 3/1 phase AC system.
Electricity quality - motors and other electric equipments shall be operatable at following electricity quality without trouble
Voltage: 400V, 3Ph, 230V, 1Ph +5%, -15% variation
Cycle: 50 Hz +1%,-7% variation
voltage dip: 5Hz voltage dip shall be allowed.
Control - if other voltage system for control system is required, necessary inbuilt transformer shall be provided.
▪ All components, accessories raw materials and finished parts used in the manufacture and assembly of switch boards, power and control circuit wiring and earthing system shall comply with the relevant Indian Standards amended upto date,
▪ The entire work shall comply with I.E.Rules. Particular care shall be taken to ensure compliance with rules 41,45,51 and 61.
▪ Site conditions :
▪ Ambient temperature 46 deg C average with 51 deg C peak
▪ Humidity 80% maximum
▪ Maximum temperature and humidity are likely to occur simultaneously
POWER WIRING:
▪ Three phase motors and other power circuits of the air-conditioning system shall be connected to the main switch board through 3, 3.5, 4 core PVC insulated sheathed cables conforming to IS 1334. The size selections of these cables shall be made taking into account of the maximum rated current of the equipment, ambient temperatures and the applicable de-rating factors.
▪ All cables shall be of approved make only. They shall be of the PVC Copper Armored and installed in tight fittings of treated brass glands and sockets. The cable sizing shall be done based on the manufacturer's data.
▪ Each individual motor feeder shall have a continuous capacity of at least 125% of the motor full load current. The minimum capacity of a cable supplying a group of motors should be at least equal to the sum of the full load current ratings of all the motors plus 25% of the full load current rating of the largest motor in the group.
▪ Cables shall be laid directly in ground or alternatively clamped in suitable metalic cable trays suspended from the ceiling or mounted on the walls. Wherever cables are laid underground, they shall be of the armoured type. The termination of cable sockets shall be of adequate dimensions. The cable conductors shall be crimped or soldered into these cable sockets. In the case of soldered joints, care should be taken to remove the oxide film through the use of appropriate type of flux.
▪ Cables shall be laid generally in accordance with Indian Standard Codes of practice.
▪ Cables shall be laid in trenches or buried or carried on walls as stated in the schedule, or approved by the Employer
▪ Were more than one cable is running, proper spacing shall be provided to minimise the loss in the current carrying capacity.
▪ The control cables shall be suitably supported with wooden cleats fixed on M.S. supports when run on walls or in a trench.
▪ The cables in trenches shall not be laid loose or haphazardly and shall be tied up so that cooling of cables can be effective.
▪ When burried they shall be covered with a layer of soft shifted earth and protected with cement concrete tiles.
▪ Special care shall be taken to ensure that no undue stress is caused on the insulation. (to a radius of not less than 20 times the overall diameter).
▪ When cables pass through pipes, wooden bushes shall be provided at the ends. When these pass through floors and walls the cable holes shall be sealed.
▪ All cables shall have identification tags and shall be supported at close intervals to avoid strain on the glands.
▪ For the cables to be directly buried in ground, the scope of Air-conditioning contractor shall include excavation of trenches, supply of sand, bricks, concrete troughs, cable markers and back filling of trenches with river sand.
ISOLATING SWITCHES:
▪ Isolating switches or lockable type on & off stations shall be provided for isolation of each motor in emergency in accordance with IS 900 - "Code of practice for installation and maintenance of induction motors".
▪ All equipments away from the main switchboard requiring isolators close to their location shall be fitted with such isolators. Isolators will be complete with sheet steel enclosures, mounted in an approved manner on free standing angle iron frames.
▪ Double door constructions conforming to IP-55 grade of protection and epoxy coated isolators shall be mounted in an approved manner for the equipments located in exposed atmosphere.
EARTHING
The Contractor shall provide earthing to ISI requirements. All the work shall be done to the satisfaction of the Electrical Inspectorate / concerned authorities.
SIZE FOR EARTHING OF ALL EQUIPMENTS AND SWITCHBOARDS
The main panel shall be connected to the main earth bus by means of two numbers 50mm X 6mm GI strips. All switches, isolators’ db's and conduits shall be connected to the earth and the sizes of the earth conductors selected for various equipments shall be as follows:
Cross sectional area of the size of earth conductor (Current carrying conductor Sqmm )
400V motor control centre 50mmX 6mm - GI strip
LT AC motor 150 to 200 kw 50mmX 6mm - GI strip
LT AC motor 110 to 132 kw 40mmX 6mm - GI strip
LT AC motor 55 to 90 kw 25mmX 6mm - GI strip
LT AC motor 15 to 45 kw 25mmX 6mm - GI strip
LT AC motor 3.75to 11 kw 16sqmm stranded GI wire
LT AC motor 0.75to 2.2 kw 6sqmm stranded GI wire
Control desk, control post 50sqmm stranded GI wire
Isolator and socket outlet 50sqmm stranded GI wire Above 16A and upto and Including 100A
Push button station, limit Switches, switch boxes 6sqmm stranded GI wire Isolators and socket outlets Upto 16A
The branch earth lines from the main panel to earth equipments shall be separated and should not criss-cross other lines. Earthing shall not be done by looping from one board. If screws slackens, all connection after that become ineffective. So it should be tied up or welded by running earth bus at convenient places and giving short and rigid lugs to the switches and glands.
The earth resistance of the earth pit shall be measured and the Contractor shall submit a record of measurement so obtained.
5. MODE OF MEASUREMENTS
Representatives from the Contractor and Department shall conduct a joint inspection of the equipments. All the discrepancies observed either incomplete works or defective work shall be clearly indicated in the joint inspection report.
An approved metallic tape shall be used at site and utmost care shall be taken to see that the same is preserved in good conditions throughout the period of execution.
The entire refrigeration unit/Chillers with all accessories, starters, controls, control panels, control wiring, vibration mounts, local control stations, discharge side plenum for direct throw units, floor mounting MS angle iron base, wall mounting MS angle brackets, protection grill for condensing unit, suspension arrangement, refrigerant piping, refrigerant charge oil, erection, commissioning and testing shall be regarded as one unit for the purposes of measurement and payment. Refrigeration piping and its insulation will also form a part of refrigeration/chillers unit and hence no measurement will be carried out for the same.
All sheet metal ducting complete with duct supports, hangers, vibration isolation pads, turning vanes, girth angles, flanges and gaskets, access panels, turning vanes, erected in position shall be measured externally and paid per unit area. All duct dampers shall be included in the duct area.
All manual control / splitter damper sections with operating linkages, locking, quadrant, sheet steel enclosure, frame, erection, supporting etc., shall be measured on the basis of damper cross sectional area and paid per unit area.
Intake louvers with bird screen, sheet steel louvers and control damper, frame, erection etc., shall be measured on the basis of cross sectional area and paid per unit area.
Side wall grilles shall be measured on the basis of the core area excluding the margin flange and the unit rate shall include necessary frames.
Ceiling diffusers also shall be measured on the basis of the core area excluding margin flanges and the unit rate shall include necessary frames and dampers.
Area of duct insulation finished as per specification shall be calculated on the basis of finished duct area before insulation and paid at unit area.
Air handling unit/Packaged unit insulation along with supply and return air plenum insulation shall form one unit.
Acoustic insulation shall be calculated on basis of external duct size and paid for per unit area. Room acoustic insulation shall be calculated on the basis of the finished area and paid for per unit area.
All painting shall form part of the cost of equipment, piping etc. No separate payment shall be admissible.
The unit rate for the cables includes the cost of cables and clamps, installation, commissioning and testing, cable marks or ceiling support.
The distribution board shall be considered as one unit and shall include:
▪ Incoming and outgoing feeders
▪ Interconnections, controls and instrument wiring
▪ Meters, relays, indicating lamps, CTS, control fuses etc.
▪ Supporting structure, sheet steel enclosure.
▪ Installation and testing.
All water pipes shall be measured net length as laid or fixed and measured linear over all fittings such as bends junction etc., and given in running meters. The length shall be taken along the centre-lines of the pipes and fittings.
Length of other fittings (valves and strainers) which are paid under appropriate item shall not be re-measured under linear measurement, but they will be measured by number and paid separately.
6. TESTING
Routine and type test for various items of equipment shall be performed at the Contractor works and test certificates shall be furnished. If required by the Client, his authorized representative shall be permitted to be present during the tests.
After notification to the Client that the installation has been completed, the Contractor shall make under the direction of Client such tests and inspections as have been specified or as the Client shall consider necessary to determine whether or not the full intent of the specifications have been fulfilled and whether further tests shall be considered necessary. The Contractor shall bear all the expenses thereof.
The contractor shall operate, test and adjust all Air-conditioning, ventilation and exhaust system units, fan motors, all air handling appliances provided in connection with the installation and shall make all necessary adjustments and corrections thereof including the adjustments of all regulating dampers. A carefully detailed record of the results of these adjustments shall be furnished to and be subject to the approval of the Client.
7. PERFORMANCE TEST
A performance test by keeping the plant running for a period of 72 hrs. shall be carried out in peak summer, peak monsoon and peak winter periods. During the tests reading shall be taken hourly. From the readings so taken, the Contractor shall also establish the plant capacity. The computed results shall tally with the specified capacities furnished with Tender.
All the test equipment, instruments, labor, operating personnel, oil and refrigerant required for these tests shall be furnished by the Contractor at his own cost.
If the tests do not show satisfactory result, the Contractor shall at his own cost, rectify/replace the defective installation or part thereof as directed by the Client within two months. The decision of the Client shall be final and binding in this respect. Only after all these tests are satisfactorily completed and the defects found during these are rectified, the plant will be finally accepted.
TEST READINGS:
The following minimum test readings will be taken to assess the performance of the plant.
SI.No. Item Test Readings.
1. Compressor Refrigerant gas, suction pressure(PSIG)
Refrigerant gas, suction temperature (DegC)
Refrigerant gas, discharge pressure (PSIG)
Refrigerant gas, discharge temperature(DegC)
BHP consumption -100% load
75% load
50% load
2. Condensers Refrigerant condensing pressure (PSIG)
Refrigerant condensing temperature (DegC)
Air flow rate - (lps)
Air temperature - Leaving/Entering(DegC)
3. Air handling units Air quantity (CMH/Static Pressure)
Coil entering condition (DB/WB)
Coil leaving aircondition (DB/WB)
Canvass temperature(DB/WB)
4. Motors Amperage
Voltage
Single phase trip time
Power factor
TESTING GAURANTEE
All equipments and space conditions shall be tested after carrying out necessary adjustments and balancing to establish the equipment ratings and indoor space conditions. At least four sets of readings shall be taken daily for each item tested and submitted in the form shown separately. Instruments required for testing shall be furnished by the Contractor.
All equipment shall be guaranteed for the specified ratings plus/minus 3% tolerance. All equipments and the entire installation shall be guaranteed against defective materials and workmanship for a period of 24 (Twenty four) months from the date, the equipment and installation are handed over.
8. TECHNICAL DATA TO BE FILLED BY CONTRACTOR
CONSIDERED MAKES, ORIGIN & ITEM SUPPLIED FROM
DETAILS TO BE FILLED BY VENDOR
|SI NO |ITEM |MAKE |ORIGIN |SUPPLIED FROM |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
| | | | | |
9. LIST OF APPROVED MAKES
|SI NO |ITEM |MAKES |TO BE SUPPLIED FROM |
|1 | |TRANE |FRANCE |
| |AIR COOLED BRINE CHILLER | | |
|2 |PUMP SETS |GRUNDFOSS |USA / EUROPE |
| | |ITT |USA / EUROPE |
|3 |VFD |DANFOSS |USA/EUROPE |
| | |SIMENS |EUROPE |
| | |ABB |FINLAND |
|4 |MS PIPE |JINDAL |INDIA |
| | |TATA |INDIA |
| | |SAIL |INDIA |
|5 |RPUF / EPS |LLOYDS |INDIA |
| | |BEARED CELL |INDIA |
| | |JL ENGINEERING |INDIA |
|6 |GROOVED COUPLING |VICTAULIC |INDIA |
| | |SEVCON ( ITT ) |INDIA |
|7 |BUTTERFLY VALVE |AUDCO |INDIA |
| | |SAUNDER |INDIA |
| | |ADVANCE |INDIA |
| | |CASTLE |INDIA |
|8 |TWO WAY MODULATING ON/OFF VALVE |JOHNSON CONTROL |EUROPE / USA /UK |
| | |BELIMO |EUROPE / USA /UK |
| | |HONEYWELL |EUROPE / USA /UK |
|9 |NON RETURN VALVE |ADVANCE |INDIA |
| | |AUDCO |INDIA |
| | |SAUNDER |INDIA |
| | |LEADER |INDIA |
| | | | |
|10 |Y STRAINER | | |
| | |ADVANCE |INDIA |
| | |HONEYWELL |INDIA |
| | | | |
| | | | |
|11 | |AMSTRONG | |
| | | |INDIA |
| | | | |
|12 |SUCTION GUIDE | | |
| | |ITT |INDIA |
| | |EMARALD |INDIA |
| | |ANERGY |INDIA |
|13 |BALL VALVES |AUDCO |INDIA |
| | |SAUNDER |INDIA |
|14 |METALLIC BELLOWS |EMARALD |INDIA |
| | |CORI |INDIA |
| | |KANWAL |INDIA |
|15 |DIAL TYPE PRESSURE GAUGE (SS TYPE) |H GURU |INDIA |
| | |WAREE |INDIA |
| | |PIONEER |INDIA |
|16 |DIAL TYPE TEMPERATURE GAUGE (SS TYPE) |AN INSTRUMENTS |INDIA |
| | |H GURU |INDIA |
| | |WAREE |INDIA |
|17 |AUTOMATIC AIR VENT |FLAMCO |INDIA |
| | |AMTROL |INDIA |
|18 |WELDING ELECTRODES |ESSAB |INDIA |
| | |ADVANI |INDIA |
|19 |ELECTRICAL CABLES |POLYCAB |INDIA |
| | |UNIVERSAL |INDIA |
|58 |MCB ISOLATOR |L&T |INDIA |
| | |SCHNEIDER |INDIA |
| | |SIEMENS |INDIA |
|20 |CABLE TRAYS |PROFAB |INDIA |
| | |SAI ENGG | |
| | | | |
|21 |MS CONDUIT ACCESSORIES |BARATH |INDIA |
| | |GUPTA |INDIA |
| | |GV |INDIA |
|22 |CABLE GLANDS |COMET |INDIA |
| | |STANDARD METAL |INDIA |
| | |PRABHAT |INDIA |
NOTE:
❖ All Equipment / Components used in execution of work will be selected from the make listed above Owner / Engineering Consultant. The Owner / Engineering Consultant reserve the right to choose any one of the make listed above. The rates quoted above shall be valid for any of the makes mentioned above.
❖ The country of origin for the materials to import shall be of USA / EUROPE / JAPAN.
❖ Imported items rate quoted should be including the port charges, port handling charges, other local duties, loading, transportation/insurance upto site, octroi charges and all other taxes and incidentals complete till delivered at site, Customs duty and countervailing duty for the above imported equipment, Receiving at site above imported equipment, unloading, storing, handling hoisting, installing in position, effecting connections, anchoring, grouting testing and commissioning above equipment including supplying & installing all necessary indigenous accessories as required to complete the installation.
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related download
Related searches
- fidelity equity income ii fund
- global ii regents dbq
- aquaforno ii collapsible stove
- aquaforno ii amazon
- type ii demand ischemia
- level ii teaching certification pa
- virtual ba ii plus calculator
- ba ii plus calculator online
- english ii persuasive essay prompts
- texas instruments ba ii plus calculator
- ba ii plus user manual
- blackrock funds ii annual report