54
PERIODIC MAINTENANCE
Should overheating occur or the gas supply fails to shut off, turn off
the manual gas control valve to the appliance.
VENTING SYSTEM INSPECTION
Breathing Hazard - Carbon Monoxide Gas
Breathing carbon monoxide can cause brain damage or
death. Always read and understand instruction manual.
•
Flue gases may escape if vent pipe is not connected.
•
Be alert for obstructed, sooted or deteriorated vent
system to avoid serious injury or death.
•
Do not store corrosive chemicals in vicinity of water
heater.
•
Chemical corrosion of flue and vent system can
cause serious injury or death.
•
Analyze the entire vent system to make sure that
condensate will not become trapped in a section of
vent pipe and therefore reduce the open cross
sectional area of the vent.
At least once a year examine the vent system. Points of inspection
are as follows:
1.
Check for obstructions and/or deterioration of the intake air and/
or vent piping and the intake air and vent terminations. Replace
immediately where needed.
NOTE:
Do not reach inside the vent termination when the heater
is in operation.
2.
Check all vent system connections for leakage and repair or
reseal as necessary.
Be sure the vent piping is properly connected to prevent escape
of dangerous flue gasses which could cause deadly asphyxiation.
Obstructions and deteriorated vent systems may present serious
health risk or asphyxiation.
Chemical vapor corrosion of the flue and vent system may occur
if air for combustion contains certain chemical vapors. Spray can
propellants, cleaning solvents, refrigerator and air conditioner
refrigerants, swimming pool chemicals, calcium and sodium chloride,
waxes, bleach and process chemicals are typical compounds which
are potentially corrosive.
If after inspection of the vent system you found sooting or
deterioration, something is wrong. Call the local gas utility to correct
the problem and clean or replace the flue and venting before
resuming operation of the water heater.
INTEGRATED FILTER PREVENTATIVE MAINTENANCE
The heater is designed to shut down if the pressure switch senses
that the air inlet vent or the exhaust vent is restricted. In this case, the
pressure switch will open and the heater will generate the “Blocked
Air Intake” fault (see Fault and Alert Messages beginning on Page
51). If the troubleshooting section of this manual indicates that there
is a blockage at the air inlet integrated filter, note the following:
•
Turn off the gas supply to the water heater at the manual gas
shut-off valve (see Figure 37 on Page 31), and disconnect
power to the water heater. See Electrical Wiring on Page 33.
•
To inspect the filter, loosen the hose clamp at the adaptor rubber
boot and slide the plastic pipe out and away from the adaptor
rubber boot (See Figure 14 in Integrated Filter Installation).
•
Remove the adaptor rubber boot containing the outer clamshell
housing by turning clockwise approximately 1/2” (30.5 cm) and
pulling off of the internal clamshell housing (See Figure 14 in
Integrated Filter Installation).
•
Using your fingers or a small flat blade screwdriver, remove the
filter media from the outer clamshell housing, handle carefully
(See Figure 16 in Integrated Filter Installation).
•
To clean filter, lightly tap the back of the filter support to dislodge
any large debris. Smaller debris may be
•
Removed by using a vacuum cleaner. the filter media may be
cleaned by dipping the filter media into a
•
Solution of warm soapy water and rinsing in clean water. Do
not scrub, allow to air dry before reinstalling.
•
Filter media may be cleaned on an average 2 to 3 times before
replacing with a new filter media is required.
•
Reinstall filter media by doing the above steps in reverse order.
•
Turn on the gas supply and reconnect power. Refer to Electrical
Wiring on Page 33, Control System Operation on Page 36,
and Start Up on Page 44. Verify proper operation of the water
heater before leaving.
The water heater must never be operated without the filter
media installed. Damages or service calls associated with
operating the heater without the filter media installed are not
covered under the limited warranty.
TEMPERATURE-PRESSURE RELIEF VALVE TEST
Burn hazard.
Hot water discharge.
Keep clear of Temperature-
Pressure Relief Valve
discharge outlet.
It is recommended that the Temperature-Pressure Relief Valve
should be checked to ensure that it is in operating condition
every 6 months.
When checking the Temperature-Pressure Relief Valve
operation, make sure that (1) no one is in front of or around the
outlet of the Temperature-Pressure Relief Valve discharge line,
and (2) that the water discharge will not cause any property
damage, as the water may be extremely hot. Use care when
operating valve as the valve may be hot.
To check the temperature-pressure relief valve, lift the lever at
the end of the valve several times. Refer to Figure 47 below.
The valve should seat properly and operate freely.
If after manually operating the valve, it fails to completely reset
and continues to release water, immediately close the cold
water inlet to the water heater and drain the water heater, see
Draining and Flushing on Page 55. Replace the Temperature-
Pressure Relief Valve with a properly rated/sized new one, see
Temperature-Pressure Relief Valve on Page 20 for instructions
on replacement.
DISCHARGE PIPE
TEMPERATURE-PRESSURE
RELIEF VALVE
Figure 47
If the Temperature-Pressure Relief Valve on the water heater weeps
or discharges periodically, this may be due to thermal expansion.
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