A04_2025-03_SOW_Heat_pump_TS_and_Repair.docx

Gateway National Recreation Area Sandy Hook Unit

Troubleshoot and Repair HVAC System at Building 65

DATED:

March 2025

NATIONAL PARK SERVICE

NORTHEAST REGION

SCOPE OF WORK

Troubleshoot and Repair HVAC System at Building 65 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 at Building 65 and make the system fully operational. The HVAC system consists of, but not limited to, two (2) x eight (8)-ton Mitsubishi Electric Outdoor VRF Heat Pumps units, two (2) BC Controllers located in Mechanical Room on the 1st Floor, ten (10) mini-split units on 1st floor, three (3) stand-up units on 2nd floor, and four (4) indoor units on 2nd Floor. One leaking valve was detected and repaired; however, the system still does not hold a charge. All work will be conducted at 65 Kearny Road located in the Sandy Hook Unit of Gateway National Recreation Area, Fort Hancock, and Monmouth County, New Jersey 07732.

2 x Mitsubishi Electric Outdoor Condensing Unit in use:

· Mitsubishi Electric – CITYMULTI

OUTDOOR VRF HEAT PUMP

· Model Number: PURY-P96TLMU-A-BS

· Serial Numbers: 86W00073 & 86W00074

· Refrigerant: 410A; 17 lbs + 10 oz each

· 2 x 8-Ton Units

The Vendor shall:

· Conduct an entire system check to determine the cause(s) of the failed system. The Contractor is responsible for the diagnosis and troubleshooting of the entire HVAC system.

· Provide all materials and labor required for troubleshoot and repair of the entire existing HVAC System. 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 3 faulty valves and/or up to 3 faulty fittings that will need to replace. If there are any other issues discovered when troubleshooting and pressure testing the system, the Contractor shall inform the COR immediately to discuss the needed course of action.

· 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 entire system with the proper refrigerant (410A) and make the system fully operational again. The total amount of refrigerant necessary is not known, however it is estimated not to exceed 50-lbs. The contractor will be required to determine and provide the total about of refrigerant needed to properly charge the system.

· Complete an entire system inspection, including pressure testing, of the newly repaired system to verify the entire system is working properly.

· All work shall be done by code. All manufactures guidelines and requirements shall be followed.

· Contractor shall be qualified to work on units and system being repairs. 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 VRF Heat Pump and BC Controllers are attached. Photos of the HVAC System is attached.

· The Primary Contractor Shall hold all required mechanic licenses to work on the HVAC replacement, and the Primary Contractor shall perform a minimum of 51% of the labor.

Information Package on Materials Provided:

· Contractor must provide all manufactures 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 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, 65 Kearney Road, Fort Hancock, NJ 07732. Vendor shall contact COR and coordinate all onsite work to be performed.

Period of Performance All HVAC troubleshooting and construction work shall commence within 2 weeks of Contract Award. Work shall be completed within 30 days after the CO issues the notice to proceed. Work shall be performed in between the hours of 7 a.m. and 5 p.m. during the work week of Monday thru Friday excluding Federal Holidays, unless prior approval is given by the COR.

image1.wmf