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RESIDENTIAL GAS AND ELECTRIC WATER HEATER
SERVICE HANDBOOK
A.O. Smith Water Products Company Training Department
©2002 Ashland City, Tennessee
16
STANDARD RESIDENTIAL ELECTRIC WATER HEATERS
INSTALLATION
SOME MODELS MAY HAVE SIDE OR REAR CONNECTIONS
TO †FUSED
ELECTRICAL
SUPPLY
(BREAKER BOX)
COLD WATER
INLET LINE
SHUTOFF
VALVE
INSTALL THERMAL
EXPANSION TANK AFTER
SHUT OFF VALVE. PRE-
PRESSURIZED TO EQUAL
SUPPLY WATER
PRESSURE
DRAIN LINE
HOT WATER
TO FIXTURES
ELECTRICAL
JUNCTION BOX
ADJACENT
CONDUIT
ENTRANCE
RATING PLATE
WITH MODEL
AND SERIAL
NUMBER
TEMPERATURE AND
PRESSURE RELIEF VALVE
OPENING MAY BE ON SIDE
OR TOP OF HEATER. DO
NOT REUSE OLD VALVE
ACCESS PANELS – WATER
TEMPERATURE ADJUSTMENT
IS BEHIND THESE PANELS.
RECOMMENDED SETTING IS
125
°
SEE MANUAL
AND LABELS
FOR
INSTALLATION
CLEARANCES
†FUSE SHOULD BE RATED
AT AMPERAGE INDICATED
ON RATING PLATE TIMES
125%
UNION
FLOOR
DRAIN
6” AIR GAP
UNION
INSTALLATION MUST FOLLOW LOCAL CODES AND INSTRUCTION MANUAL GUIDELINES.
DRAIN VALVE
INSTALL DRAIN PAN TO PREVENT
FUTURE WATER DAMAGE