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C. CLEANING THE HEAT EXCHANGER
❑ Shut off the water supply to tank and boiler.
❑ Remove the heat exchanger.
❑ Flush inside of heat exchanger with water and rinse the outside with
water and scrub with soft bristled brush.
❑ Re-install heat exchanger as per section B.
❑ Turn on water and bleed air from the system by opening a hot water
faucet higher than the heater.
D. ANNUAL INSPECTION
❑ Lift test lever on the temperature and pressure relief valve and let
water run through valve for a period of approximately 10 seconds.
This will help flush away any sediment that might build up in water
passageways.
❑ Inspect tank fittings for leakage.
❑ Flush tank at 10 years (or earlier if needed).
E. DRAINING THE HEATER
❑ CAUTION: Shut off all power to the heater before draining water.
To drain the tank, a hot water faucet must be opened to admit air
to the tank.
❑ Attach a hose to the drain valve on the heater.
❑ Close valve on the cold-water line to the heater.
❑ Open the drain valve and direct the water to a drain.
❑ Open a hot water faucet higher than the heater.
F. LONG TERM SHUT DOWN
❑ If the water heater is to remain idle for an extended period of time,
the power and water to the heater should be turned off to conserve
energy.
❑ The water heater and piping should be drained if they might be
subjected to freezing temperatures.
❑ After a long shutdown period, qualified service personnel should
check the heater’s operations and controls.
❑ Make certain the water is filled before placing it in operation.
G. EMERGENCY
❑ Should the heater be subject to flood, fire, or other damaging
conditions, DO NOT place the water heater in operation again until it
has been thoroughly checked by qualified service personnel.
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