Electrical Connections/Wiring Diagram - A.O. Smith High Efficiency 100 series Installation Instructions Manual

Electrical Connections
Before plugging in the water heater, always make sure:
• The Voltage and frequency correspond to that specified on the
water heater.
• The electrical outlet has the proper overload fuse or breaker
protection.
• Water heater to be located within 6 feet of 120VAC outlet.
• Unit is to connect to a 120VAC electrical supply outlet
(extension cord is not allowed).
• The water heater and the outlet are properly grounded.
• Installed in accordance with prevailing provisions of local codes,
or in the absence of such, National Electric Code, ANSI/NFPS
70 current edition.
Completely fill the tank with water and check all connections for
leaks. Open the nearest hot water faucet and let it run for three
(3) minutes to purge the water lines of air and sediment and to
ensure complete filling of the tank. The Electrical power may then
be turned on. Verify proper operation after servicing.
WARNING
You must provide all wiring of the proper size outside of the water heater. You must obey local codes and electric
utility requirements when you install this wiring. This appliance must be electrically grounded in accordance with local codes or, in the absence of local
codes, with the National Electrical Code ANSI/NFPA No 70 (current edition) and/or THE CSA C22.1 ELECTRICAL CODE.(LATEST EDITION)
Note: If any of the original wire as supplied with the appliance must be replaced, it must be replaced with 105

ELECTRICAL CONNECTIONS/WIRING DIAGRAM

Electric Shock Hazard
Disconnect power before
servicing.
Replacing all parts and
panels before operating.
Failure to do socan result in
death or electrical shock
TRANSFORMER
DAMPER
TEMPERATURE CUT-OFF
SWITCH
GAS CONTROL VALVE/
THERMOSTAT
IGNITER/FLAME
SENSOR
FV SENSOR
BN - 24VAC
V - 24VAC
GR
ON/OFF SWITCH
FIGURE 23.
22
WARNING
Electric Shock Hazard
Plug into a 3 prong outlet.
Do not remove ground prong.
Do not use an adapter.
Do not use an extension cord.
Failure to follow these
instructions can result in
death, fire, or electrical shock.
FLUE DAMPER
BK - 24VAC (HOT)
WH - 24VAC (NEUTRAL)
1 2 3
YL
END SWITCH
4 5 6
BL
RD
YL YL
TEMPERATURE
CUT-OFF SWITCH
FV SENSOR
6 5 4
4 3 2 1
3 2 1
BL
RD
GAS CONTROL VALVE\THERMOSTAT
FLAME SENSOR\IGNITER
° C wire or its equivalent.