Nordic ATWC Series, Installation And Service Manual, Page: 55 / 106

PRELIMINARY: 24-Sep-2021 Page 55 002536MAN-00
The ATWC-Series Startup Record located in this manual is used in conjunction with this startup procedure to provide a detailed
record of the installation. A completed copy should be left on site, a copy kept on file by the installer, and a copy should be sent to
Maritime Geothermal Ltd.
Check the boxes or fill in the data as each step is completed. For data boxes, circle the appropriate units. Fill in the top section
of all three copies, or one copy if photocopies can be made after the startup has been completed.
Pre-Start Inspection
Outdoor Unit:
1. Ensure both circuits have been pressure tested, vacuumed to 500 microns and any extra charge required has been added.
2. Ensure all 4 access valves have been fully opened and the caps have put been back on and tightened. Check the caps for
leaks.
3. Ensure the outdoor unit is securely mounted in place.
4. Ensure the power and controls signals to the outdoor unit are properly connected, neat, and securely fastened.
5. Ensure fan outlet is clear of obstructions.
Indoor Loop (Hydronic Loop):
1. Verify that all shutoff valves are fully open and there are no restrictions in the piping from the heat pump to the indoor loop,
and that full flow is available to the heat pump.
2. Verify that the entire system has been flooded and all the air has been purged as much as possible. Further purging may
be required after the system has been operating for a while.
3. Verify that the loop contains the proper mix of antifreeze (if used) for the intended application. If applicable, record the type
of antifreeze and the mixture value on the startup sheet; circle % vol. or % weight.
4. Record the static loop pressure on the startup sheet.
Electrical:
1. Ensure the power to the unit is off.
2. Verify all high voltage connections. Ensure that there are no stray wire strands, all connections are tight, and the ground
wire is connected tightly to the ground connector.
3. Record the circuit breaker size and wire gauge for the heat pump.
4. Verify that the control connections to the unit are properly connected and all control signals are off, so that the unit will not start
up when the power is turned on.
5. Verify that the circulator pumps are connected to the proper voltage terminals in the heat pump. Record the voltages of the
circulator pumps.
6. Ensure all access panels except the one that provides access to the electrical box are in place.
Startup Procedure