Maritime Geothermal Compressor WH-235-H-B-5S-PP-01

Place the unit in SERVICE mode via the PC App or LCD interface

Ensure electrical power is not turned off at the breaker panel

Connect the refrigerant recovery unit to the heat pump’s internal service ports via a refrigeration charging manifold and to a recovery tank

Plan to dispose of refrigerant if there was a compressor burnout

Ensure refrigerant to water heat exchangers have full flow or are completely drained of fluid

Start circulation pumps via building control system if necessary

Ensure all hose connections are properly purged of air

Start the refrigerant recovery as per the instructions in the recovery unit manual

Ensure nitrogen is flowing through the system at the lowest flow rate during brazing procedures

Replace the liquid line filter-dryer if the refrigeration system has been exposed to the atmosphere

Place a wet rag around any valves being installed to protect non-metallic seats or seals from excessive heat

Aim the torch flame away from the valve body

Solder only one joint at a time and cool joints down in between

Enter the nitrogen pressure at 10 psig

Enter the nitrogen pressure at 25 psig

Remove the display board cable connector from the control board

Slice each of the display board standoff heads off

Pull the display board from the unit

Remove the display board cable connector from the back of the display board

Place a new display board standoff into each of the four holes in the cabinet

Remove the new display board from the static bag it was shipped in

Connect one end of the display board cable to the back of the display board

Place the display board in position and align the four standoffs into the four holes of the board

Was there a compressor burnout?

Dispose of refrigerant according to local codes

Disconnect piping and remove crankcase heater

Replace the compressor and liquid line filter-dryer

Ensure nitrogen is flowing during brazing procedures

Charge the unit with new refrigerant and operate for 2 hours

Is there a performance degradation not explained by a refrigeration circuit problem or low loop flow rate?

Loop Disconnection and Flushing

Flush heat exchanger with a lime removing solution

Performance Check for Warm Water Open Loop Systems

Is the system performance reduced for warm water open loop systems?