A04_REVISED-02-27_SOW_Heat_pump_TS_and_Repair_1_0003.pdf

Gateway National Recreation Area Sandy Hook Unit

REVISED

Troubleshoot and Repair HVAC System at Building 26

DATED:

February 2026

NATIONAL PARK SERVICE

NORTHEAST REGION

SCOPE OF WORK

Troubleshoot and Repair HVAC System at Building 26 Gateway National Recreation Area - Sandy Hook Unit

Intent The intent of this contract is for a complete Troubleshooting and Repair of the entire existing HVAC system for Building 26 and make the systems fully operational.

The HVAC system for Building 26 consists of one (1) x Twelve (12)-ton Daikin VRV-IV Heat Pump condensing unit for the first floor of the building, and one (1) x fourteen (14)-ton Daikin VRV-IV Heat Pump condensing unit for the second floor on the building. The inside HVAC system consists of, but not limited to five (5) stand-up units, and one (1) air handler unit on the first floor, and four (4) air handler units on the second floor.

The HVAC system for the first floor has a suspected leak and low refrigerant. The HVAC system for the second floor had one leaking elbow and two leaking couplings detected and repaired; however, the system still does not hold a charge.

All work will be conducted at 26 Hudson Road located in the Sandy Hook Unit of Gateway National Recreation Area, Fort Hancock, and Monmouth County, New Jersey 07732.

Daikin Outdoor Condensing Unit-1st Floor:

Daikin VRV-IV Heat Pump Unit Model Number: RXYQ144XATJA Serial Number: 2107501409 Refrigerant: R410A; 18.1 lbs.

12-Ton VRV-IV Heat Pump Unit - 230V

Daikin Air Units on the 1st Floor:

Daikin Industries 5 x stand-up units 1 x Fan Coil Unit (Model Number: FXTQ24PAVJU)

Daikin Outdoor Condensing Unit-2nd Floor:

Daikin VRV-IV Heat Pump Unit Model Number: RXYQ168TTJU Serial Number: 1505303009 Refrigerant: R410A; 17.2 lbs 14-Ton VRV-IV Heat Pump Unit - 230V

Daikin Air Handler Units on the 2nd Floor:

Daikin Industries 3 x Model Number: FXMQ48PAVJU 1 x Model Number: FXMQ36PAVJU

The Contractor shall:

Conduct an entire system check of both the first and second floor HVAC systems to determine the cause(s) of the failed system. The Contractor is responsible for the diagnosis and troubleshooting of the entire buildings HVAC systems.

Provide all materials and labor required for troubleshoot, testing, and repair of the entire existing building’s HVAC system. This includes but not limited to the entire line sets of the first and second floor, all reachable fittings, and all equipment. The contractor shall provide the detailed findings of the troubleshooting to the Park.

The Park assumes that the problem that is causing the leak(s) can be up to 6 faulty valves or fittings that will need to be replaced. If there are any other issues discovered when troubleshooting and pressure testing the systems, the Contractor shall inform the COR immediately to discuss the needed course of action.

The Contractor shall communicate with the COR when any material is needed to be moved in the basement for the complete inspection and repair of the line sets. The Park will move any necessary items.

No compression/Crimped fittings shall be used. All fittings and refrigerant lines shall be brazed.

Provide all material and labor for the recharging of the building’s entire HVAC systems with the proper refrigerant (R410A) and make the systems fully operational again. The total amount of refrigerant necessary is not known, however it is estimated not to exceed 75-lbs. The contractor will be required to determine and provide the total amount of refrigerant needed to properly charge the systems. If the total refrigerant is greater than the estimated amount the Contractor shall inform the COR immediately to discuss the needed course of action.

Complete an entire HVAC system inspection (for both 1st and 2nd floor), including but not limited to pressure and vacuum testing, of the newly repaired systems to verify the entire system is working properly.

All piping insulation that has been removed to test the fittings and lines shall be reinstalled. If the existing insulation is not reuseable, the Contractor shall install new properly sized insulation, ensuring all piping and fittings are insulated. There are approximately 4 feet of uninsulated piping located where the Park made two repairs, this area shall also be insulated with new properly sized insulation.

All work shall be done by code. All manufacturers’ guidelines and requirements shall be followed.

The Contractor shall be qualified to work on the units and systems being repaired. All parts/materials shall be from or approved by the manufacture of the units being repaired.

A copy of the Construction Drawings of the HVAC system, along with the cut sheets of the

Daikin Heat Pumps are attached. Photos of the HVAC Systems are attached.

The Primary Contractor Shall hold all required mechanic licenses to work on the HVAC system.

Information Package on Materials Provided:

Contractor must provide all manufacturers specs, manuals, and information on all materials they are providing.

Contractor must supply warranty information on all applicable materials.

Site Visit All potential contractors are strongly encouraged to visit the site prior to bidding on the work. If a contractor does not complete a site visit, it does not relieve them of the accuracy of their pricing. The set days of the site visit will be specified, and the hours of the site visit will be between 9 am and 2 pm. The visit needs to be scheduled through the park POC.

Work Location The location of the work to be performed is at the Sandy Hook Unit of Gateway National Recreation Area, 26 Hudson Road, Fort Hancock, NJ 07732. The Contractor shall contact COR and coordinate all onsite work to be performed.

Period of Performance All HVAC troubleshooting and construction fieldwork activities shall commence within 2 weeks of Contract Award. Work shall be completed within 21 days after the CO issues the notice to proceed.

Work shall be performed between the hours of 7 a.m. and 5 p.m. during the work week Monday through Friday excluding Federal Holidays, unless prior approval is given by the COR.