Attachment 7 - Questions and Answers for Chillers.docx

Remove and Install Trane Chillers for B266 and B1231 Questions and Answers

1. Controls - Will the LRAFB be responsible to unhook the HVAC controls on the existing chillers? SOW states to run EMCS conduit and tie to unit and wrap / tape wires

2. Freon - Does the contractor have to remove the freon from the (2) removed chillers?

3. Does the existing chilled water systems contain glycol? If so how much?

4. Will the new systems require glycol? If so what will the required percentage be? Will testing be required?

5. Will all work be required on weekends?

6. Who will remove and replace the chain link fencing covering the chiller at B-1231?

7. Will we need to include controls connection and test out in our proposal or will Trane be taking care of that directly with the AFB?

8. Will we need to include any time for start-up?

9. Will the existing wiring, conduit and breakers be used to serve the new chillers?

10. Should we assume that all butterfly valves are in good working condition and be re-used?

11. The specs call for the chilled water valves to be replaced. Does this include the supply and return valves on the permanent chiller and temporary chiller connections? 4 valves per chiller?

12. If this is the case, the system will have to be drained and the temporary chiller will not be able to be used. What is the glycol percentage and will contractors be responsible for the loop chemical and glycol?

13. It was mentioned during the walk through that there was data center type of equipment in building 1231. How long will we be able to shut down this system without causing a problem? 1231? 266?