2_WRBR_152008_-_Plumbing_and_Mechanical_Items.pdf

8-29-2106 Amendment Items for WRBR 152008

Plumbing

1. Specification Section 22 10 00:

a. Paragraph 2.08.B: Add “Watts” as an allowed manufacturer.

b. Paragraph 2.09.A: Add “Watts” as an allowed manufacturer.

c. Paragraph 2.13.B: Add “Bradley” as an allowed manufacturer.

2. Drawing Sheet P6.4: Delete the “RW” from the flush valve model number given for P-1H.

Mechanical

1. Specification Section 23 20 10 – Water Piping Systems and Hydronic Specialties

a. Add paragraph 2.05.D:

“D. Buffer Tanks: Furnish and install as shown on plans, A.S.M.E. steel bu ffer tanks of 400 gallon capacity, 36” diameter with an overall height of 98”. The tank must be designed, constructed and stamped 125 psi @ -20°F to 450°F in accordance with Section VIII, Division I of the A.S.M.E. Boiler and Pressure Vessel code and registered with the National Board of boiler and pressure vessel inspections. The bu ffer tank shall be painted with one coat of red oxide shop primer paint. A manufacturer’s data report for pressure vessels, Form U-1A as required by the provisions of the A.S.M.E. Boiler and Pressure Vessel code shall be furnished for each bu ffer tank upon request. Four main piping connections, two thermometer wells, two temperature sensor wells, one air vent connection, and one drain connection shall be provided on each tank. A 12” x 16” manway shall be provided for access to the interior. Tanks shall be provided with legs or skirt for vertical installation. Internal baffle shall not be provided. Provide customized version of Model # CBT-36-094 as manufactured by Niles Steel Tank, or approved equal by American Wheatley HVAC Products, Cemline Corporation, Hanson Tank, Taco, or equivalent.”

2. Drawing Sheet M6.1: Delete previous Sheet M6.1 and replace it with revised Sheet M6.1 dated 8-29-2016. Purge valves have been added in the mechanical room for the geothermal system. A bypass has been added in the geothermal field vault and the direction of two elbows in that vault have been corrected. Drain valves have been added to the buffer tanks.