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Example of chiller
transformer
(Varies between models)
1. Turn chiller on by adjusting the thermostat to call for cooling. If more than
one chiller is on site, turn them all on. Allow time for all chiller 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 -
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If more than one voltage is shown on the equipment’s data plate, the factory default setting is
usually the higher voltage on the transformer.
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As an example, a "208/230" voltage will be set to "240" from the factory.
1.5.e Three-Phase Adjustment
WARNING
Failure to heed the following may result in injury or death.
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The information contained in this section is intended for use by qualified technicians, familiar with electrical
service-industry safety standards and methods.
If a three-phase unit fails to operate at start up, the orientation of the line voltage "field" wiring may need to be
adjusted.
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The phase monitor is located inside the electrical panel.
Three-Phase
Monitor
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
next leg.
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Switch incoming power wires at L1 and L2 on the line side to the contactor.
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Switch incoming power wires at L1 and L3 on the line side to the contactor.
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Switch incoming power wires at L2 and L3 on the line side to the contactor.
3. When chiller starts, disconnect power and verify off. Then confirm all line voltage connections
are securely tightened. Reconnect power.
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If chiller does not start, contact AquaCal
®
for further assistance.
