Three-Phase Adjustment - Aquacal GBB Installation Manual

1. Turn heat pump on by adjusting the thermostat to call for heating or cooling. If more than one heat pump is on-
site, turn them all on. Allow time for all heat pump compressors to activate.
2. Measure the running site voltage.
3. Confirm transformer tap is set for the measured site voltage. If more than one voltage tap is shown, select the
voltage nearest to the running site voltage.
PLEASE NOTE -
If more than one voltage is shown on the equipment's data plate, the factory default setting is
l
usually the higher voltage on the transformer.
As an example, a "208/230" voltage will be set to "240" from the factory.
l
1.5.d Three-Phase Adjustment
DANGER
Deactivate power while routing wiring to control board.
l
Follow all National Electric Codes (NEC) and/or State and Local guidelines.
l
WARNING
The information contained in this section is intended for use by qualified technicians, familiar with electrical
l
service-industry safety standards and methods.
NOTICE
Setting a voltage other than what is listed on the heat pump's data plate can damage equipment and is not covered
l
under warranty.
If a three-phase unit fails to operate at start-up, the orientation of the line voltage "field" wiring may need to be
adjusted.
Units equipped with the ICM Digital Three-Phase Monitor will display a "Back Phase Rev" fault code on the
l
phase monitor display.
The phase monitor is located inside the electrical panel.
l
1. Deactivate power to the unit. Confirm that power is off to all three legs using an
electrical test meter set for the correct voltage.
2. Switch position of the incoming power wires at each leg as follows, re-connect power and
attempt to restart the unit. If the unit fails to start, disconnect power. Verify off and proceed to
the next leg.
Switch incoming power wires at L1 and L2 on the line side to the contactor.
l
Switch incoming power wires at L1 and L3 on the line side to the contactor.
l
Switch incoming power wires at L2 and L3 on the line side to the contactor.
l
3. When heat pump starts, disconnect power and verify off. Then confirm all line voltage
connections are securely tightened. Reconnect power.
If the heat pump does not start, contact AquaCal
l
"Contacting AquaCal AutoPilot, Inc." on page 1.
Page - 18
Failure to heed the following will result in injury or death.
Failure to heed the following may result in injury or death.
Failure to heed the following may result in damage to equipment.
®
for further assistance. See
ICM Digital
Three-Phase
Monitor