SOW - Turnkey Replacements B3631 n B3635.pdf
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- Brand Name or Equal - WaterFurnace Model: UBH015R for B3631 & B3635 - Turnkey Replacement
- Solicitation number
- A070764SS
About this file
This is a Statement of Work (SOW) for the removal and replacement of Dedicated Outside Air System (DOAS) water-source heat pump units at Joint Base San Antonio Fort Sam Houston.
The project involves the turnkey replacement of 48 failed DOAS units serving three-story dormitory facilities (Buildings 3631 and 3635), totaling approximately 81,694 square feet. The contractor must remove existing WaterFurnace Model UBH015R ceiling-suspended units and furnish and install 48 new 1.25-ton (15,000 BTUH nominal) horizontal package water-source heat pump units with pre-heat coils that meet or exceed the as-built drawing equipment schedule WHP-2. The new units must feature right-hand return air configuration, ceiling plenum mounting, high-efficiency single-stage compressor with environmentally friendly refrigerant (R-454B, R-32, etc.), AHRI/ISO 13256-1 certified water-to-refrigerant coaxial heat exchanger, and integrated safety protection including high/low pressure switches, condensate overflow detection, and freeze protection sensors. The units operate as cooling-only with water source pre-heat coil capability, controlled by 3-way, 2-position control valves, and equipped with hot gas by-pass and/or hot gas reheat for 100% outside air operation.
The contractor shall provide all labor, tools, hardware, equipment, and lifting/rigging/safety equipment necessary for unit removal through designated access openings, condensate line installation, connection of supply/return condenser and hot water lines with isolation valves and strainers, ductwork reconnection, and complete control wiring integration and commissioning. Performance must be completed within 275 days after award at locations 3207 Chambers Pass and 3483 Chambers Pass, San Antonio, Texas 78234. This is classified as a commodity buy with incidental services.
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Other files
| File | Type | Posted |
|---|---|---|
| Sources Sought - JBSA FSH (B3631.B3635) Replacement DOAS WSHP.pdf | ||
| Atch 01 - Site Photos - DOAS.pdf |
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Text version
DEDICATED OUTSIDE AIR SYSTEM / WATER-SOURCE HEAT PUMP
TURNKEY REPLACEMENT BUILDINGS 3631 & 3635
JOINT BASE SAN ANTONIO FT SAM HOUSTON
STATEMENT OF WORK
BACKGROUND
B3631 and B3635 are three-story, approximately 81,694 SF dormitory facilities. The HVAC system consists of water-source heat pumps supported by associated cooling towers and boilers. Each dorm room is conditioned by an individual water-source heat pump. Dedicated Outside Air System (DOAS), which are equipped with preheat coils, are shared among every four dorm rooms to provide conditioned outdoor air that mixes with return air before being introduced into the rooms. The DOAS units are currently in a failed condition and need to be replaced.
SCOPE OF WORK / TECHNICAL REQUIREMENTS
The contractor shall provide all labor, tools, hardware, and equipment necessary to complete the requested work and adhere to all safety and occupational standards. Contractor shall be responsible for maintaining and securely storing all parts, materials, and equipment required for the installation at the Contractor’s facility until such items are needed at the project site. This Statement of Work defines the tasks required for the removal and replacement of 48 DOAS units. The DOAS are situated outside above the breezeway ceilings and are equipped with their own designated 2’ x 3’ access doors.
This is a commodity buy with incidental services.
Dedicated Outside Air Units (DOAS) WSHP
1. Contractor shall remove the existing WaterFurnace Model: UBH015R (or similar), ceiling-suspended units through the designated 3’-11.5” x 2’ (LxW) access openings, condensate piping and P-Trap.
2. Contractor shall furnish and install forty-eight (48) water-source heat pumps DOAS units with pre-heat coil (to meet or exceed as-built drawing equipment schedule WHP-2) in including new condensate drain lines and P-traps in strict accordance with the new equipment manufacturer’s recommendations.
The unit shall be suspended from the overhead structure above the breezeway metal ceilings which are removeable panels. The contractor shall provide all lifting, rigging, and safety equipment necessary to safely execute unit removal.
3. Contractors shall connect supply and return condenser and hot water lines to the newly installed
WSHPs, including new isolation valves, strainers, and flexible hose kits.
4. Contractors shall reconnect route supply and return ductwork to the newly installed WSHPs.
5. Contractor shall connect all control wiring to the new units. Contractors shall update control hardware, sensors, or thermostats if required to ensure full compatibility with the new units and seamless operation in accordance with manufacturer specifications.
6. Contractor shall perform all required work under this contract until the entire system is fully integrated, commissioned, operational, and functioning as designed by manufacturing specifications.
SALIENT CHARACTERISTICS
The contractor shall provide a 1.25-ton (15,000 BTUH nominal) horizontal package water source heat pump. The unit must feature a right-hand return air configuration and be designed for ceiling plenum mounting. The system must utilize a high-efficiency single-stage compressor with environmentally friendly refrigerant (R-454B, R32 etc) and an AHRI/ISO 13256-1 certified water-to-refrigerant coaxial heat exchanger. The control system must include integrated safety protection with high/low pressure switches, condensate overflow detection, and freeze protection sensors.
DEDICATED OUTSIDE AIR SYSTEM / WATER-SOURCE HEAT PUMP
TURNKEY REPLACEMENT BUILDINGS 3631 & 3635
JOINT BASE SAN ANTONIO FT SAM HOUSTON
STATEMENT OF WORK
Note 2 (restated): Ceiling Mounted, Horizontal Type, Cooling-Only unit with water source pre-heat coil
Heating Capacity below shown is for the Pre-Heat Coil. Pressure drop of 20kPA; Coil shall be controlled with a 3-way, 2 Position control valve. Unit shall be provided with hot gas by-pass and/or hot gas reheat as required by manufacturers for proper unit operation at 100% outside air.
DELIVERY/PERFORMANCE LOCATION:
The buildings for HVAC replacement are located adjacent each other within the JBSA FSH San Antonio
Military Medical Center Annex;
• B3635 – 3207 Chambers Pass, San Antonio, TX 78234
• B3631 – 3483 Chambers Pass, San Antonio, TX 78234
DELIVERY/PERIOD OF PERFORMANCE:
Performance shall be completed within 275 days after award.
END OF SOW
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