Veterans Affairs



MICHAEL E. DEBAKEY VA MEDICAL CENTERHOUSTON, TEXASProject Number: 580-14-101Project Title: Upgrade HVAC System Animal LabContractor shall provide all labor, supervision, transportation, materials, apparatus, tools, and equipment necessary to upgrade the heating, ventilation, and air conditioning (HVAC) system serving the basement animal lab as per described in this statement of work. All work shall be done in Building 109 at the Michael E DeBakey Medical Center (MEDVAMC) located at 2002 Holcombe Boulevard, Houston, Texas 77030.General Requirements: Contractor shall perform the work while animal lab still operational. The project will be divided into phases to allow continuous operation of the animal lab. Animal specimens in the lab are very sensitive to sound and vibrations which can affect the outcome of ongoing research investigations. Contractor is required to isolate working area in each phase from the rest of the animal lab with a 1-hour fire proof wall along with soundproofing insulation to minimize sound and vibrations dispersion. In addition, contractor is required to use low noise and low vibration tools during all project phases. See attached AHU 3 Replacement Existing and New SchedulesAir Handling Unit ReplacementCurrent VA policy for air handling units (AHU) serving the animal lab requires redundancy. Animal Lab is currently serve by AHU-4 with AHU-3 as a back-up. Both units share outdoor air intake louvers. These louvers will serve as rigging access of the new AHU and equipment. Contractor shall provide a temporary screen barrier on AHU-4 during AHU-3 replacement.Contractor shall remove existing AHU-3 through the intake louvers or as directed by the Contracting Officer Representative (COR). Removal shall include all associated materials; i.e.: pipe, valves, actuators, etc. AHUs and associated material shall be discarded per VA Master Specs shall provide a new AHU and shall be manufactured by Johnson Control or equal (units shall comply with VA master specs attached). Control components shall be Direct Digital Control (DDC) and manufactured by Johnson Controls or equal (shall be compatible with existing building control infrastructure). The new AHU and control components shall interface and communicate with existing Johnson Controls Metasys building control system. All existing control points shall be transferred to the new AHU. There will be additional control points that will need to be added and programed by contractor. The AHU unit will be programmed as a constant volume unit, but the installation of new variable frequency drives will be required to allow fine adjustment of the supply air.Provide AHU with plenum fans wall as per specifications.Contractor shall clean existing intake and outlet louvers and plenums.Contractor shall prime intake plenum.Contractor shall design, fabricate, and install new ductwork transitions to fit new AHU dimensions. Ductwork shall be in accordance of VA Master Specs and SMACNA standards.Ductwork to be externally insulated in accordance with the VA Master Specs.Contractor shall modify existing housekeeping pads to accept new AHU footprint.AHU dimension shall be selected to allow rigging thru existing access on the penthouse. It is the contractor’s responsibility to properly rig AHU in place.Contractor shall demo existing electrical connections to AHU.Contractor shall provide new electrical connections to new AHU, depending on AHU selection electrical connection may need upsizing.Contractor shall replace all existing control devices with DDC Johnson Controls equipment or equal. Devices shall be integrated to existing building automation system. They shall be programmed as needed to comply with control sequence.Contractor shall remove and discard all existing pneumatic control devices and permanently cap pneumatic tubing back to source.Replace all existing volume dampers and fire dampers of the AHU’s and exhaust fans. Dampers shall be in accordance with VA Master Specs and NFPA Life Safety Code.Replace existing duct smoke detectors with new duct detectors and program them to existing Building Automation System (BAS). Provide necessary control programming to use these to shut supply and exhaust fans down as well as report alarms to the BAS. This work shall be performed by a certified fire alarm contractor.Contractor shall provide digital and analog filter pressure differential gauges and shall be connected to BAS. Provide necessary programming to report this alarm to BAS for filter replacement.Install new DDC Chilled Water and Hot Water Control Valves per VA Specs.Provide new chilled water, heating water and condensate piping to new AHU’s per VA Specs. New pipe shall be installed downstream of new cut off valves.Replace existing chilled water and hot water cut off valves per VA Specs. This may require freezing of the existing pipes.Preparation for the installation, start-up and re-commissioning of the unit can be accomplished during normal working hours.Contractor shall provide updated control sequence diagrams, drawings, specifications and operation manual for all equipment and control programming performed on the job. Shall be provided in three hard copies and one data CD.Contractor shall provide programing to modify existing graphics, control sequence, control points, control blocks and any other programming needed for the unit to comply with control sequence operation. See attached.Contractor shall provide a control point checklist and verify proper functioning of all new controls devices. This includes verifying proper functioning of all DDC control devices.Contractor shall provide new air flows stations on the supply of ductwork per VA Specs and shall be compatible with BAS.Contractor shall provide new air flows stations on the exhaust of ductwork per VA Specs and shall be compatible with BAS. This for all exhaust fans.Contractor shall provide and install new variable frequency drives for new AHU, VFD shall be ABB or equal compatible with existing BAS infrastructure. Drive shall be properly sized for the motors. Drive shall comply with VA Specifications and provide bypass capability.Contractor shall provide an air handling unit with high efficiency totally enclosed motors as per specifications.Contractor shall provide a new steam humidifier to be installed in the new AHU-3. The humidifier shall be a jacketed type designed to attain full dispersion of steam in the airstream.Location: AHU preferred location of the humidifier is between the pre-heat and cooling coils. Duct-mounted steam humidifiers are permitted, where space conditions are limited and after-filters are not required on the downstream side of the cooling coil and supply air fan. Provide drainable stainless-steel duct sections 36 in [91 cm] in length on the upstream sides of duct-mounted humidifiers and 36 in [91 cm] in length downstream sides of duct-mounted humidifiers.Humidifier Controls: Provide a modulating steam control valve to control and maintain humidity. Locate the relative humidity sensor in the exhaust air duct to control set point. This will require installation of three humidity sensors for main exhaust fans. Provide a high-limit humidity sensor in the supply air duct to disable humidification if the discharge humidity exceeds 80% (adjustable). Ensure full integration of the humidifier controls with the BAS, including remote alarm capability. Contractor shall provide new steam line piping to serve humidifiers. Contractor shall tie into existing steam main piping. This may require a steam shutdown. If so, contractor shall coordinate with the COR before piping installation and at no additional cost.Contractor is responsible for determining a proper rigging route for demolition and installation of new AHU and all its components. This will include temporary relocation of utilities, louvers, windows and doors to allow rigging new equipment. Any damages to the property shall be corrected by contractor.Exhaust Fan ReplacementContractor shall demo and properly dispose of the existing exhaust fans EF3, EF4, EF5, EF6, EF7, EF9 and EF10 serving the animal lab.Dedicated Exhaust FansExisting Exhaust Fan ScheduleFan No.LocationFunctionCFMMax TSPFan TypeArrangement, Inlet, Rotation & DischargeWheelMax RPMDriveMotorRemarksTypeMin DiaNom HPVolts/ Phase?211-EF5B109 RoofCage Wash Hood Exhaust16001.6Vent SetUp-BlastBI15"1661Belt1E480/3?211-EF6B109 RoofAutoclave Hood Exhaust4100.25CentIn-LineBI10"1140Direct1/20 E115/1?211-EF7B109 RoofBottle Wash Exhaust5000.3CentIn-LineBI10"1415Direct1/12 E115/1?211-EF9B109 RoofBiontainment Exhaust39003.1Vent SetUp-BlastAF19-1/2"1520Belt3 E480/3HEPA Filter before Exhaust?211-EF10B109 RoofNecropsy Exhaust9003.1Vent SetUp-BlastAF12"2549Belt1 E480/3HEPA Filter Before exhaustNew Exhaust Fan ScheduleFan No.LocationFunctionCFMMax TSPFan TypeArrangement, Inlet, Rotation & DischargeMax RPMDriveMotorRemarksNom HPVolts/ Phase?211-EF5B109 RoofCage Wash Hood Exhaust16002.5Strobic Mono StackUp-BlastTBDDirectTBD480/3Single Fan Arrangement?211-EF6B109 RoofAutoclave Hood Exhaust4100.5Strobic Mono StackUp-BlastTBDDirectTBD115/1Single Fan Arrangement?211-EF7B109 RoofBottle Wash Exhaust5000.3Strobic Mono StackUp-BlastTBDDirectTBD115/1Single Fan Arrangement??211-EF9B109 RoofBiontainment Exhaust39003.1Strobic Mono StackUp-BlastTBDDirectTBD480/3Single Fan Arrangement?HEPA Filter before Exhaust?211-EF10B109 RoofNecropsy Exhaust9003.1Strobic Mono StackUp-BlastTBDDirectTBD480/3Single Fan ArrangementHEPA Filter Before exhaustFor dedicated exhaust fans EF5, EF6, EF7, EF, 9 and EF10 contractor, shall replace them with new strobic air mono-stack exhaust fans or approved equal. Fans shall be sized by manufacturers based on cubic feet per minute (CFM) and external static pressure on schedule. The discharge velocity at the nozzle shall be 3,500 fpm. Fan shall be properly sized to match existing fans as per attached schedule.Contract shall modify existing ductwork per manufacturers recommendations and VA specifications to properly connect to the new fans.Contractor shall provide engineered anchoring system to all fans, that do not cause any roof damage. In case of any water leaks, contractor shall provide repairs to the roofing system. There is currently no roof warranty for Building 109.Fans and related ductwork shall be outdoor rated.Contractor shall provide outdoor rated (NEMA 4X) for all electrical equipment for dedicated fans.Contractor shall provide new outdoor rated variable frequency drives (VFD) for all new fans. VFD shall be comply with VA master specifications.Contractor shall provide new supports for all new disconnects and VFD’s.Contractor shall provide new electrical connections to all new fans. Reuse of existing conduit through building penetrations is allowed.Contractor shall upgrade existing breakers on Motor Control Center (MCC) to match new fan horsepower (HP), as necessary.Contractor shall integrate new fans into BAS system, including new programming on sequence of operations and new graphics.Main In-line exhaust fans EF-3 and EF-4Existing Exhaust Fan ScheduleFan No.LocationFunctionCFMMax TSPFan TypeArrangement, Inlet, Rotation & DischargeWheelMax RPMDriveMotorRemarks?TypeMin DiaNom HPVolts/ Phase211-EF3B109 PH109 Basement Exhaust North122800.8CentIn-LineBI30"1010Belt5E480/3?211-EF4B109 PH110 Basement Exhaust South138201.1CentIn-LineBI30"1127Belt7-1/2 E480/3?New Exhaust Fan ScheduleFan No.LocationFunctionCFMMax TSPFan TypeArrangement, Inlet, Rotation & DischargeWheelMax RPMDriveMotorRemarks?TypeMin DiaNom HPVolts/ Phase211-EF3B109 PH109 Basement Exhaust North122801.00CentIn-LineBI30"1010BeltTBD480/3?211-EF4B109 PH110 Basement Exhaust South138201.1CentIn-LineBI30"1127BeltTBD480/3?Contractor shall provide new inline centrifugal fan to match existing exhaust fan per schedule. New fans shall match existing configuration.Housing: Low carbon steel, arc welded throughout, braced and supported by structural channel or angle iron to prevent vibration or pulsation, flanged outlet, inlet fully streamlined. Provide lifting clips and casing drain. Provide manufacturer's standard access door. Provide 12.5 mm (1/2 inches) wire mesh screens for fan inlets without duct connections.Wheel: Steel plate with die formed blades welded or riveted in place, factory balanced statically and dynamically.Shaft: Designed to operate at no more than 70 percent of the first critical speed at the top of the speed range of the fans class. Bearings: Heavy duty ball or roller type sized to produce a Bl0 life of not less than 50,000 hours, and an average fatigue life of 200,000 hours. Extend filled lubrication tubes for interior bearings or ducted units to outside of housing.Belts: Oil resistant, non-sparking and non-static. Belt Drives: Factory installed with final alignment belt adjustment made after installation.Motor, adjustable motor base, drive and guard: Furnish from factory with fan. Refer to Section 23 05 11, COMMON WORK RESULTS FOR HVAC and STEAM GENERATION for specifications. Provide protective sheet metal enclosure for fans located outdoors.In line Centrifugal Fans provide minimum 18 Gauge galvanized steel housing with inlet and outlet flanges, backward inclined aluminum centrifugal fan wheel, bolted access door and supports as required. Motors shall be factory pre-wired to an external junction box. Provide factory wired disconnect switch.Contractor shall install new indoor rated VFD properly sized for fan HP.Contractor shall provide new electrical connection, start up and balancing for all new fans. Reuse of existing conduit will be allowed only thru wall/roof penetrations.Contractor shall integrate new fans in the BAS. This will include the addition of new control points, graphics and sequence of operations.Contractor shall modify existing ductwork to accept new fans. Ductwork shall comply with VA specifications.Contractor shall provide new duct mounted humidity sensors, air flow stations and pressure differential gauges (digital and analog). Integrations with BAS is required.TAB and CommissioningContractor shall provide a before and after certified Test Adjustment and Balancing (TAB) reports for each AHU’s and exhaust fans. Report shall include volumetric flow, static pressure readings along the system, electrical readings, rpm, fan details, chilled water and heating water flow and pressure losses, etc.Contractor shall provide TAB for each room in the basement. TAB will be required after each phase completion, and a final for the entire space after project completion. Contractor is required to provide reports and the reports to be approved by the COR before proceeding to the next phase.TAB for the project shall be performed by a third-party contractor, contracted by the prime contractor, and reports shall be certified by an NEBB technician.Contractor shall commission the new equipment installation to provide performance per specifications and be compliant with applicable control sequence. Contract shall take any corrective action to assure these conditions. Commissioning will be performed with the assistance of VA personnel.Animal Lab HVAC SystemExisting and New Animal Lab HVAC System SchedulesExisting HVAC ScheduleRoom No.Room DesignationDesign Supply CFMExhaust CFMSquare FootageVolume Cu FtDesign ACHDesign PressurizationTerminal Unit Size LetterTerminal Unit NumberTerminal Unit SizeExhaust Fan B1Elevator Lobby 13000121118915+F109-B110 ?Exhaust North EF-3B2Elevator Machine Room 1029031831260-N/A?0Exhaust North EF-3B3Prep Room3303309694421NE109-B29 ?Exhaust North EF-3B3APrep Room330330186182811N9 ?Exhaust North EF-3B4Operating Room11201120497468014+D109-B38 ?Exhaust North EF-3B5Operating Room11401160431405917+D109-B48 ?Exhaust North EF-3B6Scrub640460221217218+D109-B58 ?Exhaust North EF-3B7Supply & Sterilization10801080431423715+F109-B610 ?Exhaust North EF-3B8Operating Room130013005535207150E109-B79 ?Exhaust North EF-3B9Men Restroom 10370213209411-N/A??Exhaust North EF-3B10Women Restroom 10340213209410-N/A?Exhaust South EF-4B11Clean Side Sterilization940?308302819+F109-B810 ?Bottle Washer Exhaust EF-7 & Cage Washer Exhaust EF-5B12Dietary Kitchen570570138135725ND109-B98 ?Exhaust South EF-4B13Clean Cage Storage16501650750737313NH109-B1014 ?Exhaust South EF-4B13AFeed Storage7575757376NA109-B115 ?Exhaust South EF-4B13BFeed Storage4545474626N5 ?Exhaust South EF-4B14Quarantine Ward860930350344115-E109-B129 ?Exhaust South EF-4B15Quarantine Ward860930350344115-E109-B139 ?Exhaust South EF-4B16Quarantine Ward Mixed Species660960365358811-E109-B149 ?Exhaust South EF-4B16-6Quarantine Ward--------?Exhaust South EF-4B17Arf Office17017022021635NB109-B156 ?Exhaust South EF-4B17APrivate Office10010013012785NExhaust South EF-4Electrical WestElectrical Rm West Side-20363543-N/A??Exhaust South EF-4B18Former Radiation32036035835195?C109-B16??B20Elevator Lobby 2190-14113868+E109-B179 ?Exhaust South EF-4B21Elevator Machine Room 2-29026425957-N/A??Exhaust South EF-4B22Quarantine Ward860960365358814-E109-B189 ?Exhaust South EF-4B23Animal Ward750830290285116-E109-B199 ?Exhaust South EF-4B24Quarantine Ward860930350344115-E109-B209 ?Exhaust South EF-4B25Animal Ward750830290285116-E109-B219 ?Exhaust South EF-4B26Animal Ward750830290285116-E109-B229 ?Exhaust South EF-4B27Quarantine Ward860930350344115-E109-B239 ?Exhaust South EF-4B28Animal Ward750830290285116-E109-B249 ?Exhaust South EF-4B29Animal Ward750830290285116-E109-B259 ?Exhaust South EF-4B29ACage Washer Dirty Area9402100327321418--F109-B2610 ?Bottle Washer Exhaust EF-7 & Cage Washer Exhaust EF-5B30Men Restroom 2?470270265411-N/AN/A?Exhaust North EF-3B31Women Restroom 2?350216212310-N/AN/A?Exhaust South EF-4B32Necropsy6001500270265414-D109-B278 ?Exhaust North EF-3 & EF-10 Necropsy B33Animal Ward750830290285116-E109-B289 ?Biocontainment Exhaust EF-9B34Lab600600258253614ND109-B298 ?Exhaust North EF-4B35Infectious Animal Ward Hallway19009088513+D109-B308 ?Biocontainment Exhaust EF-9B35AInfectious Animal Ward2203109088515-8 ?Biocontainment Exhaust EF-9B35BInfectious Animal Ward2203109088515-8 ?Biocontainment Exhaust EF-9B36Lab600700250245815-D109-B318 ?Exhaust North EF-3B37Biocontainment Workroom10001150290285121-E109-B329 ?Biocontainment Exhaust EF-9 & Exhuast North EF-3B38Surgical Prep660650275270315+E109-B339 ?Exhaust North EF-3B39Hallway19009088513+D109-B348 ?N/AB39AAnimal Ward3103109088521N8 ?Biocontainment Exhaust EF-9B39BAnimal Ward3103109391420N8 ?Biocontainment Exhaust EF-9B40Radiology/ Procedure Room920920490481711NF109-B3510 ?Exhaust North EF-3B41Animal Ward750830288283116-E109-B369 ?Biocontainment Exhaust EF-9Electrical EastElectrical Rm East Side020363543-N/AN/A?Biocontainment Exhaust EF-9B42Sewage Ejection Room06016816512-N/AN/A?Exahust North EF-3B43Telecominication065908854-N/AN/A?Exhaust North EF-3B44House Keeping Closet050353449-N/AN/A?Exhaust North EF-3B45Storage035434235-N/AN/A?Exhaust North EF-3B46Work Room3400177174012+G109-B37?Exhaust North EF-3B46AAnimal Ward680680190186822N?Exhaust North EF-3B46BAnimal Ward340680200196610-12 ?Exhaust North EF-3CB-6Hallway North60004564482.488+F109-B110 ?N/ACB-1Hallway East-North360036035396+C109-B386 ?N/ACB-2Hallway South- East360040439715+C109-B396 ?N/ACB-3Hallway South6400394387310+D109-B408 ?N/ACB-4Hallway North-West570045444638+E109-B179 ?N/ACB-5Hallway North-East11100451443315+F109-B4110 ?N/ANew HVAC ScheduleRoom No.Room DesignationDesign ACHDesign Supply CFMExhaust CFMSquare FootageVolume Cu FtDesign PressurizationPressurization Reversal CapabilityTerminal Unit NumberExisting Terminal Unit SizeExhaust Fan NumberB1Elevator Lobby 148001211189+?109-B1N/AExhaust North EF-3B2Elevator Machine Room 1402903183126-??N/AExhaust North EF-3B3Pre Room Ante Room1524021096944+?109-B29 ?Exhaust North EF-3B3APrep Room154604001861828+?9 ?Exhaust North EF-3B4Operating Room15118010104974680+?109-B38 ?Exhaust North EF-3B5Operating Room1510208704314059+?109-B48 ?Exhaust North EF-3B6Scrub103703202212172+?109-B58 ?Exhaust North EF-3B7Supply & Sterilization42902904314237N?109-B610 ?Exhaust North EF-3B8Operating Room15131011205535207+?109-B79 ?Exhaust North EF-3B9Men Restroom 1401402132094-??N/AExhaust North EF-3B10Women Restroom 1401402132094-?N/AExhaust South EF-4B11Clean Side Sterilization157605253083028++?109-B810 ?Bottle Washer Exhaust EF-7 & Cage Washer Exhaust EF-5B12Dietary Kitchen61401701381357-?109-B98 ?Exhaust South EF-4B13Storage45005007507373N?109-B1014 ?Exhaust South EF-4B13AFeed Storage1013012075737+?109-B115 ?Exhaust South EF-4B13BFeed Storage10807047462+?5 ?Exhaust South EF-4B14Quarantine Ward158707403503441+X109-B129 ?Exhaust South EF-4B15Quarantine Ward158707403503441+X109-B139 ?Exhaust South EF-4B16Quarantine Ward Mixed Species159007703653588+?109-B149 ?Exhaust South EF-4B17Office41501502202163N?109-B156 ?Exhaust South EF-4B17APrivate Office490901301278N?Exhaust South EF-4Electrical WestElectrical Rm West Side403036354-?N/AN/AExhaust South EF-4B18Former Radiation158807503583519+?109-B166 ?0B20Elevator Lobby 2410001411386+?109-B179 ?Exhaust South EF-4B21Elevator Machine Room 2402902642595-?N/AN/AExhaust South EF-4B22Animal Ward159007703653588+?109-B189 ?Exhaust South EF-4B23Animal Ward157206202902851+X109-B199 ?Exhaust South EF-4B24Animal Ward158707403503441+X109-B209 ?Exhaust South EF-4B25Animal Ward157206202902851+X109-B219 ?Exhaust South EF-4B26Animal Ward157206202902851+X109-B229 ?Exhaust South EF-4B27Animal Ward158707403503441+X109-B239 ?Exhaust South EF-4B28Animal Ward157206202902851+X109-B249 ?Exhaust South EF-4B29Animal Ward157206202902851+X109-B259 ?Exhaust South EF-4B29ACage Washer Dirty Area1581015753273214--?109-B2610 ?Bottle Washer Exhaust EF-7 & Cage Washer Exhaust EF-5B30Men Restroom 2401802702654-?N/A?N/AExhaust North EF-3B31Women Restroom 2401502162123-?N/AN/A?Exhaust South EF-4B32Necropsy1567015002702654-?109-B278 ?Exhaust North EF-3 & EF-10 Necropsy B33Infectious Animal Ward157206202902851+X109-B289 ?Biocontainment Exhaust EF-9B34Lab156407402582536-?109-B298 ?Exhaust North EF-4B35Hallway460090885+?109-B308 ?N/AB35AInfectious Animal Ward1523020090885+X8 ?Biocontainment Exhaust EF-9B35BInfectious Animal Ward1523020090885+X8 ?Biocontainment Exhaust EF-9B36Lab156207202502458-?109-B318 ?Exhaust North EF-3B37Biocontainment Workroom104804102902851+?109-B329 ?Biocontainment Exhaust EF-9 & Exhuast North EF-3B38Pre Op156805802752703+?109-B339 ?Exhaust North EF-3B39Hallway460090885+?109-B348 ?N/AB39AInfectious Animal Ward1523020090885+X8 ?Biocontainment Exhaust EF-9B39BInfectious Animal Ward1523020093914+X8 ?Biocontainment Exhaust EF-9B40Radiology/ Procedure Room15121010304904817+?109-B3510 ?Exhaust North EF-3B41Infectious Animal Ward157106102882831+X109-B369 ?Biocontainment Exhaust EF-9Electrical EastElectrical Rm East Side403036354-?N/AN/A?Biocontainment Exhaust EF-9B42Sewage Ejection Room401201681651-?N/A?N/AExahust North EF-3B43Telecominication406090885-?N/A?N/AExhaust North EF-3B44House Keeping Closet403035344-?N/A?N/AExhaust North EF-3B45Storage403043423-?N/A?N/AExhaust North EF-3B46Work Room41201101771740+?109-B3712 ?Exhaust North EF-3B46AAnimal Ward154704001901868+?Exhaust North EF-3B46BAnimal Ward155004302001966+?Exhaust North EF-3CB-6Hallway North430004564482+?109-B110 ?N/ACB-1Hallway East-North427004043971+?109-B386 ?N/ACB-2Hallway South- East426003943873+?109-B396 ?N/ACB-3Hallway South430004544463+?109-B408 ?N/ACB-4Hallway North-West430004514433+?109-B179 ?N/ACB-5Hallway North-East427004074001+?109-B4110 ?N/ATerminal Unit ReplacementContractor shall replace all dual duct terminal unit serving animal lab in the basement of B109. Terminal unit details are in above new schedule, contract shall provide terminal unit size for the maximum CFM per schedule. Existing Air Terminal Units, Dual DuctUnit SymbolInlet Connec DiaCFM Max/MinMin SP In WGSpace NCRemarksA5 ?145/801.140?B6 ?270/1501.140?C6 ?275/3951.140?D8 ?400/6451.140?E9 ?650/8951.140?F10 ?900/11951.140?G12 ?1200/13951.140?H14 ?1400/20001.140?I 16 ?3000/44001.140?All new TU boxes shall be dual duct, low pressure loss with sound attenuators and mixing chamber. Boxes rated sound criteria shall not exceed NC 35 at require air flow. Terminal units shall have integrated flow meter.Provide new DDC actuators for each TU box, compatible with existing BAS system.Provide new Metasys graphics that show dampers position, temperature of mixed air, airflow, room set points temperature, room actual temperature, relative humidity. In addition, this graphic shall show details on exhaust air dampers on room with motorize dampers.Provide new programming for new terminal unit control sequence to ensure room meet design environmental conditions per VA HVAC design manual. The sequence shall keep temperature, humidity and pressure relationship. Provide a software tab that allows for changing room pressurization relationship.Removal of existing terminal unit will require partial ceiling demolition.During demolition phase contractor shall cover existing equipment and watering system on rooms to avoid contact with any debris. Upon completion of work, contractor shall clean all rooms.Contractor shall install new 24” x 36” access door on each room ceiling by each terminal unit on the room. Access door shall be stainless steel, gasketed and have a minimum 18 gage door and frame.Contractor shall patch and repair ceiling to a level 5 finish. Prime and paint the entire ceiling of each room with two coats Pre-Catalyzed Acrylic Epoxy Coating. Color to match existing.Contract shall provide new branch ductwork (Hot and Cold sides) for TU 109-B16 serving Room B16, since it will require significant upgrade in size.Exhaust Damper InstallationContractor shall install new motorize airfoil type control dampers with blade and edge seals. Contractor shall field verify duct sizing before installation. Contractor may install these as part of an exhaust grille/damper combination.Contractor shall install new DDC actuators on new exhaust duct dampers. This will include the installation of new wiring and required equipment to integrate them BAS.Provide new Metasys graphics for each damper, these graphics shall be shown in conjunction of TU box graphics for each room.Contractor shall install new 24” x 24” access door on each room ceiling mounted exhaust dampers for servicing. Access door shall be stainless steel, gasketed and have a minimum 18 gage door and frame.Room environmental control devicesProvide new thermostat with integrated relative humidity sensor all rooms. Thermostat shall provide a visual display of current temperature and humidity for logging purposes.Each thermostat shall be controlling the terminal unit serving each room.Contractor can reuse existing conduit to rerun new wiring for the sensors.Contractor shall install new pressure differential monitor with visual display on each room. Differential pressure monitor shall be BAcnet compatible and shall be integrated to the existing BAS system. Differential pressure monitor must be capable to read in to air flow reading from TU box. Control programmer shall include a calculation of ACH for each room and make it display on differential pressure monitor. Monitor shall be programed to display a local visual alarms and remote alarm on Metasys. Please note local sound alarm on the monitor are not allowed due to animal sensitivity to noise. Pressure differential monitor shall be TSI Pressura Pressure Monitor RPM20-CC or approved equal.Contractor shall provide and install new analog pressure differential monitors. Monitor shall be Airflow Direction Incorporated Model ADI-69-V-N or approved equal. Monitor shall provide visual confirmation of air direction from outside of each room.Contractor shall remove and dispose existing differential monitors pressure monitor on all the rooms.Contractor shall provide new graphics on the Metasys system for the basement and for each room. The main graphic for the basement floorplan shall show a bird’s eye view showing temperature, humidity, pressure differential relationship and air changes per hour.Removal of existing direct expansion fan coil unitsContractor shall properly remove and discard three direct expansion fan coil units located in rooms B35, B39 and B26. Contractor shall dispose the units, related ductwork, piping, electrical wiring, electrical conduit, refrigerant and controls back to the source. Please remove any label on electrical boxes, breaker, etc.Contractor shall patch, finish and paint all penetrations and disturbed wall, ceiling and flooring. All repairs shall match existing terminations.Air Distribution Equipment.Replace existing supply diffuser for Titus TDCA-AA lain in type or approved equal, all diffusers shall have a 35 NC level or less for the design CFM. Match existing duct neck size.Replace existing exhaust grilles by TITUS FLF1/1”filter or approved equal, all grille shall keep a NC of 35 of less. Size to match existing. Contractor may consider including a combination of exhaust grille with 1” filter plus exhaust damper if there is enough clearance for installation.Existing Air Distribution Device ScheduleTypeCFMFunctionNeck SizeFace SizeFace TypeNCRemarksD140-90SA Diffuser5 ?24" x 24"Sqr. Cones40Ceiling MountedD2100-150SA Diffuser6 ?24" x 24"Sqr. Cones40Ceiling MountedD3160-300SA Diffuser7 ?24" x 24"Sqr. Cones40Ceiling MountedD4310-400SA Diffuser8 ?24" x 24"Sqr. Cones40Ceiling MountedD5410-500SA Diffuser9 ?24" x 24"Sqr. Cones40Ceiling MountedD6510-700SA Diffuser10 ?24" x 24"Sqr. Cones40Ceiling MountedD7710-900SA Diffuser11 ?24" x 24"Sqr. Cones40Ceiling MountedE140-150Exh. Reg.8" x 8"8" x 8"1/2" x 1/2" Grid40Ceiling MountedE2160-400Exh. Reg.12" x 12"12" x 12"1/2" x 1/2" Grid40Ceiling MountedE3410-400Exh. Reg.24" x 12"24" x 12"1/2" x 1/2" Grid40Ceiling MountedE4810-1600Exh. Reg.24" x 24"24" x 24"1/2" x 1/2" Grid40Ceiling MountedE550-200Exh. Reg.12" x 4"12" x 4"Louvered40Wall MountedE650-200Exh. Reg.14" x 14"14" x 14"Louvered40Wall Mounted w/ FilterE7160-400Exh. Reg.12" x 12"12" x 12"1/2" x 1/2" Grid40Ceiling Mounted w/ FilterE8300-360Exh. Reg.30" x 6"30" x 6"Louvered40Wall MountedPhasing PlanProject will be divided into four phases to allow continuing operation of the animal lab.During each phase contractor shall provide 1-hour rated physical barrier between work area and animal lab. The barrier shall be insulated with sound attenuation material to isolate noise as much as possible.Contractor will be assigned an access route to the work site that will vary depending on the phase they are working in. This will be the only entrance/exit to the worksite.Contractor shall isolate the HVAC of the room they are working by installing temporary duct blanks or rerouting flow within working area. It must take into account that the air handling unit cannot be turned off during any phase of the project since animal lab will be operational.Contractor shall provide a TAB for each phase at room level. The report shall provide proper flow and air pressurizations for each room. In additional, there shall be a control sequence for each terminal unit to control temperature, humidity and air pressurizations.Exhaust Duct Manifold for Animal Caging ExhaustGeneralResearch department recently acquired a new caging system for animal that provide an environmental control for animals and provide direct exhaust capabilities which reduce the smell in rooms.Manifolds ManufacturingContractor shall manufacture a new manifold per attached drawings. Ductwork shall comply with VA specifications.Contractor shall install manifolds above finish ceiling with penetrations of each branch crossing into room. Contractor shall repair and patch ceiling to keep an airtight seal between ceiling and rooms.Contractor shall provide permanent removal caps on each branch nipple.Contractor shall install the duct manifold to the existing exhaust ductwork. Contractor shall provide a class A seal. For more details refer to project drawings.Contractor shall repair and patch any damage portion of ceiling disturbed during installation.HEPA Filters ReplacementContractor shall have a certified contractor to decontaminate two existing HEPA filters housing and filter cartridges located in the penthouse of B-109. These filters serve the biocontainment unit exhaust EF-9 and necropsy table EF-10.After decontamination, contractor shall remove and replace filter cartridges as per schedule. Contractor shall field verify dimensions before installing the filters.Air Filters (HEPA)Filter No.SystemCFMMax SP DropCartridgesServiceInitialFinalNo.SizeArrangementAccess211-HF1211-EF939001.002.00424" x 24 " x 24"2W x 2HSideBiocontainment Exhaust211-HF2211-EF109001.002.00124" x 24 " x 24"1W x 1HSideNecropsy Table ExhaustSubmittalsWithin 10 calendar days of the notice to proceed receipt, the Contractor shall submit to the CO and COR the following:Quality Control Plan. Contractor shall establish a quality control plan for all work, including that of his subcontractors, to assure compliance with the contract provisions. Contractor shall submit a copy of his quality control plan concurrently with the quote and schematic submission. Quality control measures shall include, but not be limited to:Obtaining payment and performance bonds, permits, licenses and insurance.Performing all required inspections and tests.Listing all subcontractors and services they will perform.Submittal approval.Inspection pliance with applicable Federal, state and local codes and regulations related to executing the contract.Correction of unsatisfactory work.Prior to construction the contractor shall submit all plans including, but not limited to:Environmental Protection PlanWaste Management PlanThe VA will verify the contractor's shop drawings, detailed drawings, schedules, descriptive literature and samples, testing labor-laboratory reports, field test data and review the color, texture and suitability of materials for conformity with the RFP Documents and construction documents. All submittals shall be in electronic format and include a VACT Submittal Cover sheet for return as annotated. Submittals may be sent via email or a VA approved SharePoint website. Please note, VA’s email size is limited to 5MB.Code Requirements:The VA will obtain the necessary local agency approvals, as required.All work performed under this contract shall be in accordance with the VA Master Specifications ().All work shall comply with all local, state, and federal rules and regulations. In the event of a code discrepancy the stricter of the ordinances shall prevail.PROPOSED SCHEDULE:Mobilization will only occur after all plans, submittals, phasing and equipment are approved by the COR. The project is intendent to be completed during normal work hours. Contractor shall plan as necessary to ensure all parts and equipment is readily available to maintain the approved schedule.When no longer needed, the temporary materials shall be removed and any disturbances to the grounds shall be restored to their prior condition.Work shall commence upon receipt of a Notice to Proceed from the CO.Parking:Parking is rigidly controlled throughout the Medical Center. Contractor parking is only allowed in authorized areas. Contractor shall abide by all VA police requirements. Parking in designated patient parking areas is strictly prohibited. Parking for equipment necessary to perform the work will be authorized in advance of starting the project and must be coordinated with the COR.Storage of equipment & materials:The contractor shall coordinate with the COR for allocation of required workspace and for the storage of equipment and material to be used for this project. Storage space is very limited. There are no exclusive areas within the campus that can be given to the contractor for their storage/dumpster/office trailer needs.Debris Removal:The Contractor is required to remove waste materials and debris daily from the campus. All waste material and debris shall be removed off site by the contractor and shall be disposed of in accordance with applicable State and Federal regulations. All recyclable materials shall be recycled and weight tickets provided to the COR.Site Utilities:The Contractor should note this scope of work does not detail all existing structures, utilities, or components that may potentially interfere with the contract work required or require modifications. The contractor shall field verify any obstruction, utility, or condition that may hinder or interfere with their work prior to award. All proposed utility relocations, reallocations, and shutdowns shall be approved by the COR prior to commencing such work. The contractor shall field verify all existing utility installations and take appropriate action prior to working around any potential utility installation.In the event a shutdown, restriction, or interruption of any utility services is required, a written request must be submitted (at least two weeks in advance) and approved by the COR. All utility shutdowns must be reviewed and approved by the VA.Project Safety:Contractor shall comply with the following and keep a copy on site at all times:OSHAInterim Life Safety Measure Assessment Infection Control Risk Assessment Hot work Permits required as neededConfined Space Permits required as neededPenetrations of fire and smoke barriers:Prior to any installation of equipment, cables, power connections, conduit, piping or other work that penetrates a smoke or fire barrier, all such work must be approved by the COR. A penetration permit must be secured prior to disturbing the integrity of the barrier. The permit must be available for inspection at the project location. After the work is complete, the penetration must be repaired (sealed) according to accepted practice and utilizing materials (including UL/FM-listed through penetration fire stopping materials) that meet the original barrier construction requirements in order to restore the designed specifications for smoke and fire compartmentalization. All penetrations and miscellaneous openings must be protected according to NFPA 101, Chapter 8. Upon completion of any penetration repair, a visual inspection for approval must be requested from, and completed by the COR.Interim life safety and infection control protection measures:Contractor shall comply with SECTION 01 35 26 SAFETY REQUIREMENTS of VA Master Specifications including following requirements of an interim life safety measures and fire protection planMaintain the construction area to minimize the potential for fire or safety hazards resulting from storage of construction material, construction waste and debris during construction operations.Install and maintain temporary construction partitions to provide smoke-tight separations between construction areas, the areas that are described in phasing requirements, and adjoining areas. Construct partitions of gypsum board or treated plywood (flame spread rating of 25 or less in accordance with ASTM E84) on both sides of fire retardant treated wood or metal steel studs. Extend the partitions through suspended ceilings to floor slab deck or roof. Seal joints and penetrations. At door openings, install Class C, ? hour fire/smoke rated doors with self-closing devices.Prevention Of False Fire Alarms:Contractor shall comply with the requirements to prevent false fire alarms. Contractor shall provide a fire watch when impairment of the fire alarm system exceeds four hours in a 24-hour period.Material & Workmanship Quality:All materials and workmanship shall comply with all codes, standards, and recommendations of all Authorities Having Jurisdiction (AHJ). All work shall be done in a first-class manner according to the best trade practices and to the satisfaction of the COR.The Contractor shall provide VA personnel with the necessary training to properly operate all provided equipment and systems. Additionally, the Contractor shall provide complete maintenance service support during the warranty period. All maintenance service shall be performed by factory trained, English speaking, technically qualified servicemen and shall be responsible for recording all work actions in the customer’s maintenance log book. Contractor’s warranty maintenance service support shall include all parts, service, labor, travel time, and expense to perform both preventive and corrective maintenance on the new turnkey installation.Security:All contractor personnel shall obtain a short-term identification badge issued by the VA. Such badge shall be worn by the individual and prominently displayed at all times while on VA property. No employee of the contractor shall enter the project site without a valid identification badge issued by the VA. In order to obtain a short-term identification badge, contractor personnel shall present to the COR two valid (non-expired) photo identification issued by a US federal, state or local government agency. Badges will be issued by the VA at no cost to the contractor.All contract personnel are subject to inspection of personal affects when entering or leaving the project site. ................
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