Suburban SW10D, Service Training Manual

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OPerating inStructiOnS FOr
unitS WitH electric eleMent
Electric water heaters are designed to operate with a minimum amount of service problems; however, proper operation and
care is essential.
By far the most common trouble with electric water heaters results from energizing the water heater before it is filled with
water. Even brief operation of the electric element without water in the tank will burn-out the electric heating element.
To energize the electric heating element, turn the switch to “on”. The switch is located behind the water heater door in the
lower left corner of the control housing. The water temperature will be regulated by the thermostat.
TO TURN OFF WATER HEATER
1 . Turn switch to “OFF” position.
2. Turn off electrical power to the appliance.
3. Turn off gas supply.
4. If vehicle is to be stored or heater is going to be turned off while subject to freezing temperature, drain water heater. (See
Winterizing Instructions .)
ELECTRIC HEATING SYSTEM SEQUENCE OF OPERATION
The Sequence of Operation for the electric heating system is relatively simple. With suitable AC power (120 VAC) supplied
to the appliance turn on the electric power switch located at the lower left hand corner of the front of the water heater. This
will supply power to the thermostat/ECO assembly which when closed will supply power to the heating element. When the
thermostat is satisfied, the thermostat will open the circuit and stop supplying power to the heating element.
ELECTRIC HEATING SYSTEM TROUBLESHOOTING INFORMATION
Fault teSt PrOceDureS cOrrective actiOn
• NO HOT WATER OR WATER
NOT HOT ENOUGH
Confirm that thermostat and element
have proper voltage present (120
VAC), measure resistance through
element (10 Ohms), inspect by-
pass valve (if equipped) for proper
positioning, inspect diffuser tubes for
correct position.
Replace thermostat or element, if
found to be defective, set by-pass to
correct position, correct power supply
issues, replace diffuser tube(‘s) if found
defective.
• WATER TOO HOT Inspect that thermostat is secure to
tank and opening at proper water
temperature (130 +/- 5 degrees).
Replace or secure thermostat
• EXCESSIVE WEEPING FROM
P & T VALVE
Confirm water is within thermostat
operating range (130 +/- 5 degrees),
inspect relief valve for evidence of
contamination at the seal, install air
pocket in tank.
Replace thermostat or relief valve
if found to be defective, install
accumulator tank to plumbing system
per manufacturers installation
instructions.
• NOISE FROM ELEMENT WHEN
HEATING
Remove and inspect element for
sediment deposit buildup or cracks in
sheathing
Clean or replace element
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