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Technical Literature Department 39 of 52 Ashland City, TN © 2008
Servicing should only be performed by a Qualified Service Agent
ULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - SERVICE MANUAL
WIRING DIAGRAM
Service Notes - Polarity & Ground
This water heater is polarity and ground sensitive
. The control system will lock out and
display a fault message (“AC Reversed”) if the power supply polarity is reversed. Flame
sensing current cannot be established if the burner is not grounded which will lead to ignition
failure. See electrical requirements on page 8.
Hot
Neutral
Ground
120 VAC 1Ø
Power Supply