GSW SUPERFLUE POWER VENTED GAS FIRED WATER HEATER - Manual (Page 13)

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• Check that you have not just run out of hot water due to
heavy demand. If this is a routine problem, it may indicate an
under-sized water heater.
• Have your gas company check input rate and water heater
operation
• The E.C.O. may have tripped open (LED indicator on
constantly). See E.C.O. below.
Energy Cut-off Control (E.C.O.)
This water heater is equipped with a control which has a built in
E.C.O. (Energy Cut-off). The E.C.O. will shut the gas off, should
the outlet water temperature exceed 200
° F. If the E.C.O. has
tripped, the entire gas control must be replaced. For gas control
replacement, contact your local gas utility, or a qualified service
technician. The replacement control must be an identical model
to the control which has been removed.
Water Temperature is Too Hot
• Check that thermostat setting is not too high
• Water heaters used for dishwashers, space heating or
laundry facilities generally require higher temperatures than
domestic use. Install anti-scald tempering valves as
instructed in the safety warnings
• If the problem persists, contact your dealer or gas supplier
Water Heater Makes Noise
• During start up or under heavy use, condensation can drip on
the burner causing a sizzling noise as the water is
evaporated. This is normal and will stop once temperatures
rise.
• Sediment, sand or scale can accumulate resulting in
“rumbling” noises. Water heaters need to be flushed
regularly to minimize buildup. Severe accumulations (more
than 2" - 50 mm) can cause premature failure of the water
heater and will void the warranty.
• Vent piping can vibrate if it is not supported properly. Ensure
hangers and vibration isolators are properly installed.
Discolored Water
• Water rich in iron or other minerals can produce red or brown
staining. Heating water generally worsens this situation.
• Black water can be an indication of organic contaminates in
the water supply. This can be problematic in areas where the
water is obtained from surface or contaminated sources.
Organic particles can develop bacterial growth, causing
potential health hazards. Contact your water supplier for
proper filtration or water conditioning equipment. For
bacterial problems contact your local health authority. See
also “Hot Water Odor”
• A sudden appearance of rusty water can indicate the anode
rod has been depleted. The remaining steel core wire may be
corroding, releasing iron particles into the water. Inspect and
replace as necessary.
Extended Non Use
Hydrogen gas can be produced by water heaters in service but on
standby for long periods of time (generally two weeks or more).
See safety warnings in the front of the manual Hydrogen gas is
extremely flammable. Use caution in opening faucets.
Tank Flushing
Periodically (monthly) drain approximately 2 gallons (8 liters)
from the tank through the drain valve. This will minimize sediment
buildup on the tank bottom.
Caution: WATER WILL BE HOT.
If scale removal is being considered, contact your dealer for
proper procedures.
DO NOT USE HYDROCHLORIC
ACID (HCL) based cleaners. Thoroughly flush after any
chemical cleaning.
Vent Maintenance
Inspect the venting system periodically (minimum annually) to
make certain that the venting passageways, vent terminal and
blower assembly are free and unobstructed. Check that the vent
connections are free and unobstructed, Check that the vent
connections and vent joints are properly positioned and securely
attached. In areas that have a high level of airborne particles
(e.g. lint, sawdust, process smoke, etc.) Inspection and cleaning
may need to be done more frequently.
Relief Valve Check
Inspect the relief valve annually to ensure proper operation. This
involves opening the valve to check that it is flowing freely and
that there are no blockages. Provide a bucket or drainage for the
expelled water. Lift the lever and let it snap shut. The