HomeMy WebLinkAboutB14-0393 scope of work letter.pdf
222 Chapel Place Unit AC-201, Avon, CO 81620 • p. 970.949.6108 • f. 970.949.6159 VAIL
ALBUQUERQUE DENVER FORT COLLINS VAIL
www.bgce.com
Date: October 1, 2014
Mr. Eric Moberg
AMS Mountain Division
770 Lindberg Drive #501
Gypsum, CO 81637
Project: ERWSD – Vail Administration Building Boiler Replacement – RFI #1 Response
Dear Mr. Moberg,
In response to your recent questions, please see our responses to your questions below. The construction/permit
documents are hereby revised to include this information:
1.The control drawings and this paragraph INCLUDE LOGIC TO ABANDON HEATING WATER RESET
SCHEDULE AND INCREMENTALLY INCREASE SUPPLY SETPOINT (5°F EVERY 5 MINUTES) IN THE
EVENT THAT ANY INDOOR SPACE TEMPERATURE FALLS MORE THAN 5°F BELOW SETBACK
TEMPERATURE SETPOINT. RETURN TO RESET SCHEDULE WHEN ALL SPACES ARE WITHIN 2 °F OF
SETPOINT. The existing BAS does not have this capability and we do not have upgrading the BAS in our price.
Could we get this deleted from the drawings?
BGCE Response: No exception taken to removing this portion of the sequence. Modify heating water reset
schedule to read 130°F HWS @ 60°F OSA.
2. The boiler relief valve in your drawing is a 60#, our boiler will have a 30# the system rise is approximately 6’ so
we only run 15 to 20 PSI system pressure. Also this will negate a ASME bladder expansion tank.
BGCE Response: No exception taken to providing 30# boiler relief. Confirm with owners insurance that non
ASME rated tanks can be provided in this facility.
3. Air separator, we have an air scoop priced in the job not a Spirovent, considerably more cost. Will that be
acceptable?
BGCE Response: No exception taken to contractors proposed solution.
4. The 1 gallon mineral oil trap, talking with the Raypak rep all they require is a simple P trap filled. Will this be
acceptable?
BGCE Response: No exception taken to contractors proposed solution provided manufacture provides
confirmation that integral trap to boiler will not dry out during extended periods of non-condensing boiler
operation.
5. Field investigation has determined the existing boiler pumps are served via two (2) 20 A breaker and circuits
rather than the originally anticipated one (1) 20 A breaker and circuit. Per your electrical specs note s 1-3, we
were to provide a new 20A breaker and circuit. Will using the existing 20A circuit be acceptable?
BGCE Response: No exception taken to contractors proposed solution.
Sincerely,
Dan Koelliker, PE
Principal