12505B22R0016_QandAs though 6_16_22.pdf

Solicitation: 12505B22R0016 Removal and Replacement of AHU1 Chilled Water Coils Questions and Answers through 6/16/22

Question Answer

As there is no mention of chemical treatment, is it not part of the Statement of Work?

Not needed. ISU's chill water will chemically treat the coils (confirmed with ISU).

What exactly is meant by the following – Replace AHU 1 chilled water coils (2) and reconfigure original supply and return plumbing to be correct at the National Laboratory for Agriculture and the Environment in Ames, IA in accordance with the attached Statement of Work and supporting documents? Are you looking for a reverse return piping configuration?

I've have been told the supply should be on the downstream side of the air flow. Presently it is on the upstream side of the air flow. The AHU next to it is downstream.

Does the existing control valve and strainer remain unchanged? yes to both

4 Are grooved pipe and fittings acceptable? yes if you mean Victaulic or similar. As long as it is rated for chilled water.

5 Do you have a specification for the insulation? 1" fiber glass or neoprene.

Is there a requirement for flex connectors? There are none in the existing piping. No requirement. Not opposed.

Do you want individual coil connections valved separately?

The existing piping is only valved at the header. Do you want the header valves replaced?

Yes to individual coil isolation valves. Yes to header valves replaced (2 supply and return).

Do you want a drain pan between the upper and lower coils or just below the bottom coil? Yes, both. Enclosed drain to from upper to lower drain pan.

Can we request for Nortek Air Solutions (Temtrol) be added as an acceptable manufacturer?

Any manufacturer(s) not listed in the SOW that are considered as equals by the contractor submitting it will be reviewed during the submittal review process

Are center connection coils acceptable for the replacement coils or is bottom supply and top return going to be required? No. Reference pictures.

Request that Aerofin be listed as an approved manufacturer of coils as long as they meet the specifications.

Any manufacturer(s) not listed in the SOW that are considered as equals by the contractor submitting it will be reviewed during the submittal review process

Questions and Answers through 6/16/22

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Questions and Answers through 6/16/22