A.O. Smith Gdhe 50 Instruction Manual page 34

LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND
DANGEROUS OPERATION. VERIFY PROPER OPERATION AFTER SERVICING.
cautIon
power vent wIrInG scheMatIc - fIGure 34.
34
THIS WATER HEATER
IS POLARITY SENSITVE.
B EFO R E A PPLYI N G
ELECTRICITY TO THIS
HEATER BE CERTAIN
THAT SUPPLY NEUTRAL
WIRE TO GROUND
CHECk INDICATES ZERO
VOLTAGE.