SAM #30252PR260000011

USCG Station Washington HVAC System Replacement (Small Business Set-Aside)

The U.S. Coast Guard is soliciting small business contractors for the replacement of HVAC systems at Station Washington, located on Joint Base Anacostia-Bolling in Washington, DC. - Government Buyer: - U.S. Coast Guard, Base National Capital Region (NCR), Procurement & Contracting Office - Contracting Officer and QAE: MKC James Tooker - Scope of Work: - Complete removal and replacement of existing HVAC units on the second deck of building 91 and building 92 - Perform heat load calculations using the existing ducting system and provide written documentation - Install new indoor and outdoor HVAC units (heat pump system) with EPA-approved A2L refrigerant (preferably R-454B, or R-32) - Provide and install new line-sets (suction and liquid lines), liquid line driers, and solenoid valves for each circuit - Replace all thermostat control wiring (indoor and outdoor) with UV-rated wire and install a new thermostat matching system function - Replace or install new fused disconnects, wiring, and conduit as needed - Remove and dispose of old HVAC units and any corroded or damaged wiring/conduit - Perform nitrogen brazing, pressure and vacuum testing, system charging, and Test and Balance (TAB) - Site visits for field verification are strongly encouraged prior to bidding - Products/Services Requested: - HVAC heat pump system (EPA-approved, A2L refrigerant, preferably R-454B) - Indoor air handler with electric heater pack - New line-sets, liquid line driers, solenoid valves, thermostat, and control wiring - Associated labor, materials, and equipment for installation and testing - Unique/Notable Requirements: - Use of EPA-approved A2L refrigerant (preferably R-454B) - All new thermostat control wiring must be UV-rated - Written documentation of heat load calculations required - System must be tested and balanced after installation - 100% small business set-aside under NAICS 238220 - No specific OEMs or part numbers are specified; open to any manufacturer meeting the technical requirements.

Description

HVAC replacemet in accordance with the Attached SOW, to include:

a. Determine heat load calculations for the HVAC system using installed ducting system.  Use heat load calculations to determine an appropriate size/capacity for indoor and outdoor units utilizing installed ducting. Provide owner with a written copy of load calculations. If it is determined that any duct work needs to be modified, changed or resized in any way due to the heat load calculations, contractor shall provide and install. New unit shall be EPA approved A2L based refrigerant either R-454B or R-32, preferably R-454B. Contractor shall pull and entire new line-set to include new suction lines and liquid lines that run from heat pump to air handler. Contractor shall install a new liquid line drier for each circuit and locate the new liquid line drier indoors near the air handler to prevent unnecessary corrosion from outside elements.

b. Remove and dispose of the current outdoor and indoor units.  Unit will not have refrigerant in it.

c. Replace wiring and conduit from existing service disconnects to new pieces of equipment.  Replace any corroded or damaged conduit or wiring found during the demo of existing equipment. If disconnects are not fused, then contractor shall replace any and all associated disconnects with new fused ones.

d. Replace all thermostat control wiring inside and outside with new UV rated wire.  Provide and replace existing thermostat to match the system function.   

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