Maritime Geothermal WH-Series, Installation And Service Manual

Page: 39 / 77

1-Oct-2015 Page 39 002028MAN-01
UNIT STARTUP
The unit is now ready to be started. The steps below outline the procedure for starting the unit and verifying proper operation of
the unit. It is recommended that safety glasses be worn during the following procedures.
IMPORTANT NOTE: The unit is shipped with the Control Source set to Signals in order to prevent the unit from starting
when the power is first turned on. When ready to start the unit change the Control Source to the desired source with the PC
APP or through the LCD menus.
The LCD display will show the outdoor temperature (if available), low (suction) pressure, high (discharge) pressure, super-
heat, EEV position and water in/out temperatures.
Preparation:
1. Turn the power on to the heat pump and set the all controls to OFF. All LED’s on the control board should turn on, the LCD
display should say “ MGT GEN2 VERx.xx ” on line 1 and “ Zeroing EEV’s ” on line 2. You should be able to hear the EEV mov-
ing (a clicking sound).
2. Measure the following voltages on the compressor contactor and record them on the startup sheet: L1-L2, L2-L3, L1-L3.
3. Connect a USB cable between the USB connector on the board and a laptop.
4. Select the desired Control Source HYD via the PC APP or Configuration Menu. (NOTE: compressor will start on its own if
Setpoints is selected).
Heating Mode:
1.
Activate Stage 1. The EEV will begin to open and the compressor will start, as will the circulator pumps.
2. Check the PC APP or LCD Display. The suction and discharge pressures will vary based on the outside temperature and the
indoor loop temperature, but they should be about 90-110PSIG and 260-360PSIG respectively for a typical start-up.
3. Monitor the unit via the PC APP or LCD Display while the unit runs, record the following after 10 minutes of run time:
1. Suction pressure
2. Discharge pressure
3. Indoor Loop In (Hot In) temperature
4. Indoor Loop Out (Hot Out) temperature
5. Indoor Delta T (should be between
8-12°F, 4-6°C )
6. Indoor flow (if available)
7. Outdoor Loop In (Supply In) temperature
8. Outdoor Loop Out (Supply Out) temperature
9. Outdoor Delta T (should be between
5-8°F, 3-4°C )
10. Outdoor flow (if available)
11. Compressor L1(C) current (black wire, place meter between electrical box and compressor)
4. Adjust the control setpoints to the desired buffer tank temperature and let the unit run through a cycle. Record the setpoint
and the discharge pressure just before the unit shuts off.
Cooling Mode:
1.
Set the unit to cooling mode and adjust the cooling aquastat setpoints to activate Stage 1.
2. Monitoring the unit via the PC APP or LCD display while the unit runs, record the following after 10 minutes of run time:
1. Suction pressure
2. Discharge pressure
3. Indoor Loop In temperature
4. Indoor Loop Out temperature
5. Indoor Delta T
6. Outdoor Loop In (Supply In) temperature
7. Outdoor Loop Out (Supply Out) temperature
8. Outdoor Delta T
3. Adjust the cooling aquastat setpoints to the desired tank temperature, and allow the unit to run through a cycle. Record the
aquastat setpoint and the suction pressure when the unit shuts off.
Final Inspection:
1. Turn the power off to the unit and remove all test equipment.
2. Install the electrical box cover and the access panel on the heat pump. Install the service port caps securely to prevent
refrigerant loss.
3. Do a final check for leaks in the Indoor Loop piping and ensure the area is clean.
4. Turn the power on to the unit. Set the Setpoints Control (or aquastat) to the final settings and record the values.
Startup Record:
1. The startup personnel shall sign and date the Startup Record and have the startup witness or appropriate site personnel sign as
well. The startup personnel shall leave the Startup Record with the homeowner, retain a copy for filing and send a copy to
Maritime Geothermal Ltd. for warranty registration.