Nordic AH4P Series, Service Manual

Page: 13 / 30

5-Jul-2022 Page 13 002596MAN-01
The AHW/AH4P-Series Startup Record located in this manual is used in conjunction with this startup procedure to provide a de-
tailed 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.
Pre-Start Inspection
Ductwork:
1. Verify that all ductwork has been completed and is firmly attached to the unit. Verify that any dampers or diverters are
properly set for operation of the air handler.
2. Verify that all registers are open and clear of any objects that would restrict the airflow.
3. Verify that a new air filter is installed and the cover is secured.
4. Verify the condensate drain is connected, properly vented, and free of debris.
5. If a plenum heater has been installed, verify that it is securely fastened.
Hydronic Loop:
1. Verify that all shutoff valves are fully open and there are no restrictions in the piping from the zone headers to the unit,
and that full flow is available to the unit.
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 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. Ensure the power to the plenum heater is off if equipped.
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 for the air handler and plenum heater.
3. Record the fuse / circuit breaker size and wire gauge for the air handler. Record the fuse / circuit breaker size, wire gauge
and size of the plenum heater if installed.
4. Verify that the control connections to the thermostat and plenum heater (if installed) are properly connected and all control
signals are off, so that the unit will not start up when the power is turned on.
5. Ensure all access panels except the lower one that provides access to the electrical box are in place.
Startup Procedure