Maritime Geothermal Water-to-Water Heat Pump WH-55-H

Is the heat pump problem suspected?

Are alarms reported through a BACnet system?

Check for alarms and faults on the LCD Interface or PC App

Describe any alarms or faults found

Were any alarms or faults found?

Describe the rectification actions taken

Coaxial Heat Exchanger Flushing Procedure - Open Loop

Isolate the heat exchanger by closing the valves in the IN and OUT ports to the heat exchanger.

Blow out the heat exchanger into a clean 5 gallon bucket using compressed air.

Place 2 gallons of RYDLYME or similar in the purge cart (or bucket).

Circulate the fluid through the heat exchanger for at least 2 hours (3 hours recommended).

Disconnect the purge system and dispose of the solution.

Connect fresh water and a drain to the heat exchanger ports and flush the exchanger for several minutes.

Return the plumbing to its original configuration and open the IN and OUT valves.

Pump down the unit as per the Pumpdown Procedure

Was there a compressor burn out (motor failure)?

Replace the liquid line filter-dryer

Ensure nitrogen is flowing through the system during brazing procedures

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

Inspect contactor for pitted points

Inspect contactor for burned points

Is replacement of contactor necessary?

Document the maintenance performed