Maritime Geothermal Compressor W-120-H-P-2S-PP-01

Connect the vacuum pump to the charging manifold

Start the vacuum pump and open the charging manifold valves

Ensure vacuum gauge remains at less than 500 microns for at least 1 minute with the vacuum pump valve closed

Close the charging manifold valves

Shut off and disconnect the vacuum pump

Place a refrigerant tank with the proper refrigerant on a scale and connect it to the charging manifold

Remove the display board cable connector from the control board

Slice each of the display board standoff heads off using a sharp utility knife

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

Take a picture of the control board and connectors for reference

Remove all green terminal strips from the left side, right side, and bottom of the control board

Remove the red six pin display board connector from the left side of the control board

Remove all connectors from the top of the control board

Remove the control board from its four corner standoffs

Remove any remaining standoffs from the old control board

Carefully remove the new control board from the static bag

Place any cut off standoffs from the old board into the new board

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

Is the system a warm water open loop system?

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