Amendment 0002_QandA.pdf

AMENDMENT 0002 to N00173-24-Q-JD01

QUESTIONS & ANSWERS

# QUESTIONS RESPONSES

1.

Glycol Percentage: The scope references glycol in the system for these units. We need to know the designed percentage of glycol. Typically, it’s around 30 – 40 percent mixture. Glycol derates unit capacity so we need to know the proper designed percentage to factor that in and design the correct capacity unit.

Please refer to the Requirements outlined in solicitation and the revised Statement of Work (Att 01 – SOW_Rev1) under Section 3, paragraph 6. Additionally, the Contractor shall propose a solution that meets the minimum requirements outlined in the Statement of Work.

2.

Struxure Ware Infrastructure Management Tool: The scope requires communication between the new units and the Navy’s Struxure Ware system. We need to know the communication language or communication protocol that the existing Stuxure Ware system utilizes in order to make sure they can communicate properly.

Please refer to the Requirements outlined in the solicitation and the revised Statement of Work (Att 01 – SOW_Rev1) under Section 3, paragraph 2. (Both units should be equipped with network interface cards that are compatible with SNMP and both units should be configured in an N+1 setup and lead/lag config to ensure redundancy).

3.

RFQ Page 4, viii, Facility Requirement Sheet

– Would NRL please provide the Facility Work Requirement sheet that is to be included in the technical proposal?

The Facility Requirement Sheet is a vendor-created document where the vendor details what they require of NRL facilities to keep a building safe by periodical planning, checkups, and maintenance activities…i.e., there may be certain electrical requirements, rooms may need a heads up of specifics and NRL will need to know what before award.

4. Please clarify whether existing drawings/as-builts will be provided. Drawings provided at Site Visit.

5.

Please confirm that the existing primary chilled water header serving the existing CRAC units and two new CDUs is sufficiently sized.

There is an 8-inch main that comes into the building and the 4-inch primary header that feeds the existing units are fed from the 8-inch main.

6.

Please provide the expected cooling capacity for the future extension into A49/108C and Future Extension Into A49/110A, respectively.

At some point we expect to install additional APC in-row coolers in each location. Between the two locations, we anticipate the cooling capacity to be about the same as a 4th Pod.

7.

The statement of work indicates that a flow rate of 324 gpm is desired in a 4” header. Note that the maximum flow allowed in a 4” pipe under ASHRAE 90.1 is 320 gpm for variable flow systems and 210 gpm for constant flow systems. Please confirm desired header size and flow rate.

The Contractor shall propose a solution that meets the minimum requirements outlined in the solicitation and Statement of Work. Please refer to the minimum requirements outlined in the solicitation and revised Statement of Work under Section 3, paragraph 3

8.

Will all existing equipment located in the server room be removed for us to perform the work?

No (some racks may already be powered off and are able to be removed, but most equipment is operational). If this is

AMENDMENT 0002 to N00173-24-Q-JD01

QUESTIONS & ANSWERS

an issue and equipment needs to be removed, we can discuss/plan post award.

9. What are the preferred working hours? Normal business hours (7am-4pm is preferred)

10. For the bypass strainers is a dual basket strainer setup preferred?

The Contractor shall propose a solution that meets the minimum requirements outlined in the solicitation and Statement of Work.

11.

Valved and capped connections for future expansion were mentioned at the site visit.

Can you please clarify what is intended here? These are not the future connections mentioned in the SOW for the IRC’s.

At minimum, we would like the piping to be valved/capped to allow for a potential future expansion of the loop into additional rooms. This requirement is outlined in the solicitation and revised Statement of Work (Att 01 – SOW_Rev1) under Section 3, paragraph 3. (The Contractor shall propose a solution that meets these minimum requirements outlined in this section

12.

Is there an existing temperature control system, such as Siemens, Johnson Controls, Honeywell or other proprietary systems that this newly installed system needs to be connected to for this building? If so, who is the manufacturer?

Please refer to the Requirements outlined in the solicitation and the revised Statement of Work (Att 01 - SOW_Rev1) under Section 3, paragraph 2 and Section 4, line 7. (Both units should be equipped with network interface cards that are compatible with SNMP to integrate with NRLs StruxureWare DCIM tool)