John Wood Envirosense Power Direct Vent (prior to May 2010) - Manual (Page 28)

28
cautIon
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND
DANGEROUS OPERATION. VERIFY PROPER OPERATION AFTER SERVICING.
power vent wIrInG scheMatIc - fIGure 34.
THIS WATER HEATER
IS POLARITY SENSITVE.
BEFORE APPLYING
ELECTRICITY TO THIS
HEATER BE CERTAIN
THAT SUPPLY NEUTRAL
WIRE TO GROUND
CHECK INDICATES ZERO
VOLTAGE.