Questions Answers - 02262025.xlsx
XLSX spreadsheet 10 KB Posted
- Attached to
- EMI Chamber B HVAC Replacement
- Solicitation number
- W91ZLK-25-Q-EMI2
About this file
This is a Questions and Answers document for solicitation W91ZLK-25-Q-EMI2 regarding an HVAC replacement project for EMI Chamber B at Aberdeen Proving Ground. The Q&A addresses technical specifications, revealing the HVAC unit must provide 4,000-8,000 CFM of conditioned air, maintain 70 degrees and 50% humidity in the conditioned space, and is assumed to be a 40-ton unit. The existing unit's original submittal and as-built mechanical drawings are not available.
Key clarifications include: on-site programming is required with no VPN access allowed, MegaPress pipe fittings are acceptable for propane piping, temporary heating/cooling during installation is not required, and the government will remove and retain ownership of the existing fuel tank. The new BAS Controls touchscreen HMI can be installed on the existing panel door, which has 5.5 inches of clearance. Alternative duct protection methods and phenolic duct systems in place of sheet metal ductwork were not approved. No additional site visits or bid date extensions will be granted.
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Other files
| File | Type | Posted |
|---|---|---|
| Questions Answers - updated 02272025.xlsx | XLSX spreadsheet | |
| Questions received and responses.docx | DOCX document | |
| Questions and Answers - RFI for EMI - HVAC Replacement B456.xlsx | XLSX spreadsheet | |
| Questions received and responses.docx | DOCX document | |
| ACC SOW ChB HVAC revised 2-25-25.docx | DOCX document | |
| APG Chamber B HVAC pictures.docx | DOCX document | |
| ACC SOW ChB HVAC revised.docx | DOCX document |
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Questions
| EMI - HVAC Replacement B456 | ||
| project: W91ZLK-25-Q-EMI2 | ||
| Tag | pre-bid question(s) | comments |
| A | Does the GOV have the original submittal for the unit being replaced? We would like to know the exact design CFM and static pressure [and / or range for both] that the replacement unit is expected to achieve. | No, the original submital with static pressure data is not obtainable. The original requirement was for the HVAC unit to provide between 4~8000cfm of conditioned air. |
| B | Does the GOV have a copy of the as-built mechanical drawings for this chamber? If yes, can it be shared prior to bid date? | No, the original drawings are not obtainable. |
| C | Is there a GOV preferred or go to Schneider Electric BAS integrator at this facility that is already familiar with the existing controls for this project? | None. |
| D | For the purpose of programming and commissioning the BAS Controls on this project, will a contractor deployed, temporary remote [VPN] connection be allowed to provide access to an offsite programmer or will this all have to be accomplished at site? | No VPN. Programming to be performed on site. |
| E | Given that the facility is near an operational airport, will the Contractor be required to file an FAA Obstruction Evaluation for crane operations? | No |
| F | In lieu of the FlexClad detail noted in section 4.2.3, can other type of exterior duct protection methods be used such as assembled Tuffduct systems? Will phenolic duct systems be acceptable in lieu of sheet metal ductwork? | No |
| G | If known, what is the R value of the exterior duct's insulation? | Unknown |
| H | The temperature/humidity requirements of 70 deg and 50%- is that space temperature or supply air conditions? | Conditioned space |
| I | There isn't enough information to perform load calculations for the space- is the proposer to assume nominal 40-ton unit is appropriate for the space load? | Yes |
| J | Is it possible to have an additional site visit with a controls subcontractor? | No |
| K | Is it possible to extend the bid date? | No |
| L | Will the GOV recover the fuel left in the existing fuel tank prior to demo? Will this existing fuel tank need to be removed from the facility or will the GOV keep the tank after it's been removed from the pad? | Oil will be removed. The Gov will maintain ownership of the tank. |
| M | Once the existing heating and cooling equipment is removed, the chamber will be left without heating or cooling. Depending on ambient conditions, is there a requirement for temporary cooling or heating the chamber during the project duration? | No, depending on ambient conditions the chamber may be off line. |
| N | Will the GOV accept MegaPress pipe fittings for the new propane piping to and from the new HVAC unit and the propane tank? | Yes |
| O | Can the GOV confirm the new BAS Controls' touchscreen HMI can be installed on the existing BAS panel door, if space allows? This new item would be installed to replace the existing TAC HMI. | Ok to install new interface on existing panel door. There is 5.5 inches of clearance between the inside face of the panel door and the surface of the existing control board. |
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File details come from the government source that posted it. Updated .