Q A_FA2523-15-R-0001.pdf

Q & A

FA2523‐15‐R‐0001 – Replace HVAC at BMEWS, PhA, B & C

1. Q: Drawing E‐34B, The power supply on the drawing is specified as 227/480V. Is this correct?

A: The correct power supply is 480/277V. All heater units of type MultiMAXX HN 54, shall be supplied by 480V, 60Hz.

2. Q: Drawing M165, Change of Chillers units.Can one of the Chiller units be out of operation during replacement of the unit or shall the contractor include installation of temporary cooling capacity?

A: No spare chiller capacity shall be supplied when replacing the existing chillers, if replacement is done during winter.

3. Q: Drawing M‐175 / M‐178. Cooler fan units. Will there be possible during replacement to take one Cooler Fan unit out of operation without installation of other Cooling capacity?

A: No extra fan cooler shall be supplied when replacing the existing fan coolers, as they can be replaced one at a time.

4. Q: Drawing 130 ‐133. Ventilation system. On the drawings are marked Cooling coils in the duct system:

a. Are the Cooling coils existing and shall they be reused?

b. What controlling this Cooling coils?

c. Shall the new BMS system control the cooling coils? Please specify.

A: Notice that drawing 130 and 131 are for information only and nort included in this project.

The cooling coils are existing and shall be reused.The cooling coils for Fan room no. 1 and Fan room no.2 shall be controlled by the new BMS system according to drawing M‐140 “BMS – Functional description” item

12.5 and 13.5.

5. Q:Drawing M‐225. Heating Boiler room plant.

Where the 2 Ea. of Heating exchanger are indicated to be installed on the above drawing there are build a new room and where there are indicated Water treatment plant there are large size pipes. Please see enclosed picture.

a. Please advice what to be don in this regard. We expect the pipes can be cut back, but in the room there look like some sprinkler pipes has been installed.

A: a. existing condensate pipes must be cut back, acc. to the project.

New Sprinkler piping is not a part of this scope. If the change in the “old Boiler room” has impact on this project it should be handled between contractor and USAF. Contractor must estimate the extra work due to this change.

6.Q:Drawing M ‐ 206, Schedule, Components. Under the Components there is specified supply of "New Electrical Pots as Brønnum 50 l and 100 l".

a. We can not fine where this shall be installed and any product specification. Shall this be included in the project?

If yes, please provide product data or product no. and where this shall be installed! We need also information where the electrical supply to the Pots shall be feed from.

A: As far as we are aware , it is the replacement of existing steam pots . Brønnum providing such . But there are others. To include group switches and 75 m cable .

7: Q: Drawing M‐207. Component schedule specifies active carbon filter, softener, water meter and filter manufactured by Silhorko. No drawings and specification have been enclosed in the tender documents for water treatment. Shall the contractor include water treatment installation?

Please specify.

A: Water treatment installation shall be included. Manufactured by Silhorko. Contractor must verified water data from TAB.

8.Q: Drawing M‐170, sheet 1‐4. There is a conflict between design data from Cooling Product Inc. and specification section 23.82.16.00.40 page 4, 5, 6 and 7, section 01.33.00.00.18 page 2, item SD‐04 samples and specification 00.80.00.00.18 page 7 and 8. Please provide clarification and comments to questions as specified in the enclosure.

A: Cooling Products as shown in drawing M‐170 are the correct glycol coolers as make and type. Where sections in the specifications are in conflict with the above mentioned delivery, the specification is not relevant.