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February 10, 2011

Miami University

Oxford Campus

Havighurst Hall HVAC Improvements

Addendum #2

General Notes

1. Each Contractor is responsible for the removal and re-installation of ceiling tiles as required for the installation of their work.

2. In areas where the lighting is being replaced (Corridors and Main Lobby), the electrical contractor will remove the existing concealed spline ceiling and replace with lay-in ceiling tile.

3. The HVAC contractor shall provide a CPM schedule for this project. It is not necessary to obtain the services of an independent scheduling consultant if the services can be performed in-house to the satisfaction of the A/E and University.

4. Fire Protection General - There are multiple existing fire hose valves and cabinets located in the corridors on each floor of the building. The fire protection contractor shall remove the valves and cap the piping inside the cabinet. The cap shall be painted if visible from the corridor with the cabinet door closed. The existing cabinets will continue to be used as fire extinguisher cabinets.

5. Fire Protection General – The sprinkler heads in the dorm rooms shall be “residential” type heads per NFPA 13R. See “F.P. Sprinkler Note” at each floor plan.

6. The existing elevator can be used for material hoisting within the weight limitations of the elevator. The HVAC Contractor shall provide protection for the elevator cab finishes and door frames from damage throughout construction. Means and methods shall be approved by the University and A/E.

7. All new ceiling tiles and grid shall be 2’x2’ type.

8. Removal of the existing pneumatic control tubing by the Temperature Control Contractor.

Drawings

1. Drawing F-1 – Fire Protection Plans

A. Revise drawing F-1 as shown in the attached sketch F-1A.

2. Drawing P-0 – Plumbing Site Plan

B. Revise coded note #12 to read as follows: “ Route new fire service below existing tunnel. Fittings shall be limited to a maximum of 45° and provided with concrete thrust blocks with straps designed for vertical thrust per NFPA 24.

C. Bottom of existing utility tunnel is approximately 6’-0” below grade. Contractor to field verify depth of tunnel prior to installation of new fire protection piping.

3. Drawing P-1 – Mechanical Room 13 Plumbing Plans

A. Pump P-1: Hot Water Return Re-circulating Pump shall be furnished with an electrically commutated motor.

4. Drawing P-2 – Plumbing Piping Diagrams

A. The new concrete equipment pad for the water softeners shall be by the plumbing contractor.

5. Drawing H-0 – Basement HVAC Piping Plan

A. The existing concrete pad located under the existing air cooled chiller (being removed) shall be removed. Patch existing surface to match existing.

B. Revise drawing as shown in the attached sketch H-0A. Extend 2” drain piping from cooling tower drain connections to mechanical room floor drain.

6. Drawings H-2, H-3 & H-4 – First, Second & Third Floor HVAC Plans

A. Fan Coil Units FC-2 OA Intake Detail - The existing fan coil units are semi-recessed type units. The new units shall be wall mounted type. The new units are slightly wider and will therefore require slight modifications to the existing wood trim. This work shall be provided by the HVAC Contractor.

B. Coded Note 3 - Change the word “Combination” to “Condensation”.

7. Drawings H-6 – Mechanical Room 13 HVAC Plans

A. Revise drawing as shown in the attached sketch H-6A.

8. Drawing H-7 – Mechanical Room 35 HVAC New Work Plan

A. New VAV boxes are shown schematically due to the small scale of the drawings. The HVAC contractor shall stagger the box locations and provide additional separation for new duct taps as necessary to provide proper clearance for the box control panels as well as service access for all control, shutoff and balance valves. Provide additional offsets in the new low pressure supply air ductwork downstream of the boxes as necessary to connect to the existing low pressure supply duct mains.

B. Revise drawing as shown in the attached sketches H-7A & H-7B.

9. Drawings H-10 – Closed Circuit Cooling Tower Piping Diagram

A. Extend chemical treatment piping from the chemical treatment station in the mechanical room to each cooling tower. Tap the spray pump discharge piping and provide the necessary injection nozzles.

B. The spray pump discharge pipe shall also be tapped and piped through the conductivity probe furnished with the chemical treatment system. The probe shall be wired (in conduit) back to the chemical treatment controller located in the mechanical room.

C. Provide drain piping for each cooling tower spray water basin. The drain shall be provided with a normally open shutoff ball valve, strainer, solenoid valve (furnished with the chemical treatment system). The drain line shall be extended along the retaining wall to the building perimeter, then extend below grade and into the nearest floor drain in the mechanical room. Piping shall be pitched to drain. Wiring of the solenoid valve and conductivity probe shall be the responsibility of the HVAC Contractor.

10. Drawing ED-2 – First Floor Electrical Demolition Plan

A. Remove the existing ceiling and light fixtures in room 140 as shown on attached sketch ED-2A.

11. Drawing E-1, Basement Electrical New Work Plan

A. Provide 120V power to a motorized auto control relief damper at the west wall of room 35. Obtain power from LPM-28, which serves pump P-9. Refer to sketch H-7A for damper location. Provide toggle type disconnect.

B. Provide 120V power to a chemical feed pump at the south wall of room 13. Obtain power from LPM-18, which serves the temperature control panel. Refer to sketch H-6A for location. Provide toggle type disconnect.

12. Drawing E-2 – Fan Coil Cabling Detail

A. The window switch shall be recessed type, suitable for a gap distance of ¾” - GE Security Model 1125W or approved equal.

13. Drawing E-2 – First Floor Electrical New Work Plan

A. Provide a new ceiling and light fixtures in room 140 as shown on attached sketch E-2A.

Specifications

1. Specification Index

A. Section 01 11 00 - Summary of Work

1. Add the following to paragraph 1.02, P: “Alternate H-2 applies to base bid HVAC work only. The glass cloth cover for insulation work for the other HVAC alternates shall be included as part of those alternate prices.”

2. Revise paragraph 1.03, B to read as follows: “Provide labor and materials necessary for the relocation of the existing water softeners to make room for the new chiller being furnished by the HVAC Contractor. The water softener components will be located in the same location as that shown for the new water softener being furnished as part of Alternate P-1. Under the base bid, the existing water softener, valves, and header connecting the softeners shall be relocated.

3. Add the following to paragraph 1.03, F: “The glass cloth cover for insulation work under this alternate shall be included as part of the cost of this alternate.”

4. Add the following to paragraph 1.03, G: “Alternate P-2 applies to base bid plumbing work only. The glass cloth cover for alternate P-1 insulation work shall be included as part of that alternate price.”

5. Add the following to paragraph 1.05, I: “The new transformer and primary switch are scheduled to be delivered to the University by May 31, 2011. They will be stored at the East End Building. The Electrical Contractor is responsible for picking up the transformer and primary switch at the East End Building and delivery to Havighurst Hall. The transformer enclosure will need to be removed to move the transformer into the building. The Electrical Contractor shall be responsible for enclosure disassembly and reassembly” Refer to the attached manufacturer drawings for dimensions and weights of the transformer and primary switch.

B. Section 03 11 19 – Scheduling the Work

1. Revise paragraph 1.02 to read as follows:

“1.02 The existing air handling units, pumps, combination chilled/heating water system, fan coil units and domestic hot water system, including water softeners, must remain operational until May 9, 2011. All work associated with rooms 147, 147A, and 151 must be completed by July 15, 2011. All Work in dormitory rooms (including automatic cooling having chilled water available) and domestic hot water must be completed by August 1 5, 2011, and all systems including, but not limited to, air handlers, domestic hot water, and chilled water balancing & control of HVAC system must be operational by August 13, 2011. The completion/operational dates listed above are intended to be a “Completion Milestone” within the meaning of the Contract Documents governing this Project. Failure to complete the Work in the occupied areas and/or have all systems operational by this date shall entitle the University to receive/recover/retain the associated statutory delay per-diem sum set forth in the Contract Documents for each day that the Contractor fails to achieve this Milestone Date.”

2. Revise paragraph 1.07 to read as follows:

“1.07 All Fire Protection work shall be completed on student room floors including fire protection service by August 8 5, 2011. Fire Protection work in the Penthouse shall be completed by August 31, 2011. The completion/operational dates listed above are intended to be a “Completion Milestone” within the meaning of the Contract Documents governing this Project. Failure to complete the Work in the occupied areas and/or have all systems operational by this date shall entitle the University to receive/recover/retain the associated statutory delay per-diem sum set forth in the Contract Documents for each day that the Contractor fails to achieve this Milestone Date. “

C. Section 21 13 00 – Fire Protection Systems – Add paragraph 2.01,B, 6 to read as follows: “Piping down-stream of the sprinkler zone control valve assemblies only may be plenum rated ASTM/fire protection service listed SDR 13.5 CPVC pipe with socket solvent weld pressure fittings rated for 175 psig working pressure. Provide listed adapter/transition fittings for integration of threaded fire protection components.”

D. Section 22 13 00 – Water Softener. Water softener is based on a Siemens Triplex system, model # PTCFB3 (3”). See equipment notes on drawing P-1 for equipments sizes and capacities.

E. Section 23 05 23 – Valves. General - Add Griswold to the list of acceptable manufacturers.

F. Section 23 36 16 – Medium Velocity VAV Boxes. Paragraph 2.11 – Add Enviro-Tec to the list of acceptable manufacturers.

G. Section 23 70 00 – Water Cooled Heat Recovery Chiller – Add the attached specification section to the bid documents. In addition, add Carrier to the list of acceptable manufacturers.

H. Section 23 75 00 - Air Handling Units. Paragraph 2.16 - Add ClimateCraft, Racan, TMI, and Trane Air Systems to the list of acceptable manufacturers.

I. Section 23 79 00 – Heat Recovery Ventilator. Paragraph 2.01 - Add Semco to the list of acceptable manufacturers.

J. Section 23 80 00 – Fan Coil Units

1. Revise paragraph 2.02,B to read as follows: “Units shall be concealed type, and provided with a 18 ga., powder coated, framed front panel with hinged access doors. Panels shall be easily removable from frame with use of Allen key cam lock fasteners. Panels that require screw mounting to wall are not acceptable. Framed front panel must be sized to mount in existing opening. Frame and panel shall cover the existing opening such that when installed no painting and/or tile work is required.”

2. The fan coil unit manufacturer shall provide the necessary relays and controls necessary to interface with the new DDC thermostat being furnished by the HVAC Contractor and wired by the Electrical Contractor.

K. Section 23 92 00, Duct Cleaning shall be included in the base bid, not alternate #2.

L. Section 26 06 00, Acoustical Ceilings

1. Replace paragraph 2.02,B with the following:

B. Ceiling Type 1:

1. Acoustical tile shall meet the following requirements:

|a. |Size |24” x 24” x 3/4” |

|b. |Edge Detail |Shadowline Bevel |

|c. |NRC |.70 |

|d. |Ceiling Attenuation Class (CAC) |38 |

|e. |Color |White |

|f. |Grid |15/16”, Low gloss white |

2. Products

a. Frost ClimaPlus, Square Lay-in - USG Interiors, Chicago IL

b. Approved Equal by Armstrong or Celotex.

M. Section 26 43 13, Surge Protective Device

1. Add Advanced Protection Technologies, Inc. to the list of manufacturers in paragraph 1.04.A.

End of Addendum

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