John Wood Power Vent 0.67 EF - Manual (Page 17)

Electrical Supply
Important: The electrical controls used inside the gas con-
trol/thermostat of this water heater are polarity sensitive.
Ensure the electrical supply is connected correctly in the
receptacle box. Failure to connect correctly will prevent the
unit from functioning properly (see Figures 19 & 20). Before
performing any electrical service work, label all wires to
avoid connection errors. If wiring has to be replaced, use
only TYPE TEW 105°C wire, (except igniter wires). If there
is a problem with igniter wires, replace igniter assembly in
its entirety. In locations where a sump pump failure, flooding
or exposure to water may be present, a ground fault recep-
tacle is recommended.
Important: Do not use an extension cord to connect the
water heater to an electrical outlet.
• Ensure that the water heater and the outlet are proper-
ly grounded. Failure to properly ground the heater can
prevent the unit from operating.
• Ensure that the water heater is installed in accordance
with prevailing provisions of local codes, or, in the
absence of such, the latest edition of "Canadian
Electrical Code (CAN/CSA C22.1), Part I" (Canada) or
"National Electrical Code" (NFPA 70) (U.S.A.).
Before applying power to the water heater, always make
sure:
• The voltage and frequency correspond to that specified
on the water heater wiring diagram.
• The electrical outlet has the proper overload fuse or
breaker protection.
• Fill the tank with water and check all connections for
leaks. Open the nearest hot-water faucet and let it run
for 3 minutes to purge the water lines of air and sedi-
ment and to ensure complete filling of the tank. The
electrical power may then be turned on. Verify proper
operation after servicing.
Note: Always reference the wiring diagram for the correct
electrical connections.
– 17 –
WARNING
When the unit is plugged in, 120VAC is pres-
ent at the electric connections of the gas
control/thermostat.
WARNING
Electrical Shock Hazard
• Disconnect power before
servicing.
• Replace all parts and panels
before operating.
• Failure to do so can result in
death or electrical shock.
Figure 19 Wiring Diagram - Robertshaw Control
Figure 20 Wiring Diagram - White-Rodgers Control