36C25218B1083-A00002001.docx

Addendum #1 Project #: 585-17-105 Project: Install Perimeter Heat in Imaging and 4 East Date: October 31, 2018

Drawings, specifications, and / or proposals are herein amended, expanded, and / or modified, and become a part of the Contract Documents with the same effect as if incorporated in the original documents. Any contrary provisions contained, or referred to, in Drawings and / or Specifications, shall remain applicable unless overridden by this Addendum. Revised provisions herein shall include all labor, materials, methods, modifications, etc. required for the completion of the Work.

Acknowledge receipt of this Addendum in the space provided on the Bid Form. Failure to do so may disqualify Bidder.

CHANGES TO SPECIFICATIONS

1. Section 01 00 00 – General Requirements – 1.6.H Phasing:

a. Change project duration to 200 days.

b. Change duration of phase 0 to 88 days from Notice to Proceed.

c. Phase VI work on heat exchangers shall be completed after the completion of Phase V.

d. WORK HOUR RESTRICTIONS Work hours by location:

Noise Restrictions for Facility: 4:30pm to 10pm Noise Restriction for 4 East Area – 4:30pm to 8pm

e. Full height 1-hour rate construction walls will not be required. Contractor is responsible for providing a temporary barrier around the work Phase area as appropriate. Double zipper entrances must be used at a minimum. Ceilings must be back in place at the end of the work shift, either using ceiling tile or fire-rated sheeting, to maintain the integrity of the fire sprinkler suppression system.

f. Negative air machines will be required in all rooms and must exhaust through an exterior window. In-corridor work must utilize negative air machine exhausting either through an exterior window or through the temporary plastic barrier.

2. Section 09 06 00 – Schedule for Finishes: Add wall tile specifications WT-1 and WT-2.

3. Section 23 05 93 – Testing, Adjusting, and Balancing for HVAC.

A. Provide Test and Balance Report for all return mains on each floor upon completion of construction. Balance mains to CFM shown on risers. Identify any discrepancies with owner.

B. Mechanical Contractor to provide modulating motorized dampers after fire dampers on 2nd and 4th Floor return mains. Motorized damper to be installed and locked open for future tie-in to BAS.

C. Existing Volume Dampers should be used to balance each floor branch return main. Provide static pressure readings at each branch return main. Coordinate any discrepancies or deficiencies with owner. Test to be completed on entire Return Fan distribution and simulate design operation of variable volume air system for a complete test and balance report. Provide test and balance of AHU-10 Relief and ERV-2 OA Supply. Perform return grille spot checks on each floor branch duct, return grille CFM provided by owner.

D. For water-side, test and balance of new equipment, only: heat exchangers, pumps, and new radiation units.

4. Section 23 00 02 – Mechanical Coordination Drawings

A. Contractor shall provide any necessary items (valve, etc.) needed for phasing of work.

5. Sheet MP-160 – General Note

A. With the revision in heat exchanger size, all associated piping, traps, and valves shall be removed and replaced with new.2.

6. Sheet EP-160 – General Note

A. Existing fan/motor assembly is belt driven. Existing fan motor is being removed and replaced. Existing Fan Schedule should indicate belt drive.

From the existing blower submittal data:

· Fans are Twin City AFPF arrangement 3, class II. Each Return fan shall rotate opposite of the other (one supply clockwise the other counterclockwise). Fan assembly is complete with TEFC high efficiency 460V/3 Ph/60Hz inverter duty motors, motor slide base, belts, drives, belt guards, canvas connections, cage enclosures, inlet screen, structural steel fan bases and spring vibration isolators. VFD’s are provided by others and installed by others. Fan bearing grease lines shall be extended to common point on fan assembly motor side.

CHANGES TO THE DRAWINGS:

Revisions have been made to the following drawings and are issued in the form of full-size plans. Edits are indicated by a revision delta and a cloud surrounding the affected portion of the drawing.

1. G001 – Cover Sheet – Sheet has been revised to reflect additional drawings.

2. A100.5 – Second Floor Plan - Part B. - Sheet has been added and contains architectural modifications/repairs necessary for installation of new hot water convectors and piping.

3. MSD-121 – Sheet has been added and contains steam convectors to be removed.

4. MP-121 – Sheet has been added and contains new hot water convectors and piping.

5. M-602 – Sheet has been revised to contain schedule of new convectors.

ATTACHMENTS

Specification 09 06 00

Index of Plan Sheets G001 A110.5

MSD-121

MP-121

M-602

END OF ADDENDUM