Amendment0002.pdf

PDF 175 KB Posted Jun 30, 2023

Attached to: Replace AHU6-10 and Hydronic Piping at the Memphis ARTCC located at 3229 Democrat Road, Memphis, TN
Solicitation number: 697DCK-23-R-00484
Issued by: Department of Transportation Federal Aviation Administration New England Region

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Written by GovTribe AI · Dec 21, 2023

This amendment modifies a federal solicitation to replace air handling units and hydronic piping at a Federal Aviation Administration facility in Memphis, Tennessee. The solicitation seeks bids to replace ten air handling units numbered 6 through 10 and associated hydronic piping at the Memphis Air Route Traffic Control Center located at 3229 Democrat Road in Memphis. Bids are due by June 30, 2023 in response to solicitation number 697DCK-23-R-00484 issued by the Department of Transportation Federal Aviation Administration New England Region. The amendment provides additional specifications for the air handling units and piping materials.

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Other files

File	Type	Posted
Amendment0009 697DCK-23-R-00484.pdf	PDF	Jul 26, 2023
amendment0008.pdf	PDF	Jul 25, 2023
amendment7attachment.pdf	PDF	Jul 24, 2023
Amendment 0007697DCK-23-R-00484.pdf	PDF	Jul 24, 2023
Amendment00006 Memphis.pdf	PDF	Jul 18, 2023
Amendment0005Memphis.pdf	PDF	Jul 17, 2023
amendment0004Memphis.pdf	PDF	Jul 10, 2023
030130 - Maintenance of Cast-In-Place Concrete.pdf	PDF	Jun 30, 2023
zme-d-artcc-d104.pdf	PDF	Jun 30, 2023
amendment 0003 697DCK-23-R-00484 (6).pdf	PDF	Jun 30, 2023
amendment 0001 697DCK-23-R-00484.pdf	PDF	Jun 27, 2023
wagerates.pdf	PDF	Jun 21, 2023
ZME 1800750 Specification Final.pdf	PDF	Jun 21, 2023
RFO697DCK23R00484.pdf	PDF	Jun 21, 2023
ZME-1800750-DRAWING-FINAL.pdf	PDF	Jun 21, 2023

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RF0 697DCK-23-R-00484

Amendment 0002

Questions and Answers:

1. Sheet M501, detail 2, depicts domestic cold water going to the humidifier. Is the domestic cold water system to be replaced in its entirety or just a disconnect & reconnect?

Answer: Disconnect and reconnect. Install new ball valve for each unit.

2. Sheet M501, detail 2, depicts condensate drain for the humidifier. Is the condensate system for the humidifier to be replaced in its entirety or just a disconnect & reconnect?

Answer: All condensate/ drain piping in the trench will be replaced in its entirety. Drawing will be provided to show extent. Humidifier and AHU have common drain.

3. Is the condensate drain system for the AHUs to be replaced in its entirety or just a disconnect & reconnect?

Note: If these systems are to be totally replaced please provide a drawing that shows routing & sizes

Answer: All condensate/ drain piping in the trench will be replaced in its entirety. Drawing will be provided to show extent. Humidifier and AHU have common drain.

4. What product are we to use to seal the concrete trench? Please clarify Answer: See attached spec for concrete sealer.

5. Will the 2” chilled water back feed be sufficient in size to supply AHUs 9, 8, 7, & 6 once we are at that stage in the project, while the piping is being replaced? Or can the facility operate on less that four AHUs?

Answer: The secondary piping will be connected to AHU’s 7, 8, and 9. Those three AHU’s provide cooling while the piping to the main connection is replaced.

6. Sheet M501, detail 1, references EF-205 & plan sheet M401. But I do not see this information in the bid packet. Please clarify Answer: Disregard the reference to EF 205. Exhaust should be routed to exterior wall in Rm 12A.

7. Per the local Liebert rep, the Liebert AHUs have EC fans included and would not require a supply air scoop in this situation. Can the supply air scoop be removed from the project scope of work, if Liebert is used?

Answer: Provide scoop and damper

8. The Liebert rep also stated that the 12x4x48 damper would not be required, because the Liebert AHU controller has a back draft damper feature already. Can the 12x4x48 damper be removed from the project scope of work, if Liebert is used?

Answer: Provide scoop and damper

697DCK-23-R-00484amendment2

Amendment0002.doc

File details come from the government source that posted it. Updated Jun 30, 2023.