Installation guide

MAINTENANCE / SERVICESECTION 6
At least twice a year, the temperature and pressure relief valve should be checked to
ensure that it is in operating condition. To check the relief valve, lift the lever at the end of
the valve several times. The valve should seat properly and operate freely.
If water does not flow, remove and inspect for obstructions or corrosion. Replace with a
new valve of the recommended size as necessary. A thorough inspection of the valve
should be performed at least every three years by removing the temperature and relief valve
from the tank. Do not attempt to repair the valve, as this could result in improper operation
and a tank explosion. In areas with poor water conditions, it may be necessary to inspect
the T&P valve more often than the recommended maintenance schedule
If the temperature and pressure relief valve on the water heater discharges periodically or
continuously, it may be due to thermal expansion of water in a closed water supply system,
or, it may be due to a faulty relief valve.
Thermal expansion is the normal response of water when it is heated. In a closed system,
thermal expansion will cause the system pressure to build until the relief valve actuation
pressure is equaled. Then, the relief valve will open, allowing some water to escape,
slightly lowering the pressure.
COMBINED
TEMPERATURE/
PRESSURE
RELIEF VALVE
Before manually operating the valve, make sure that a drain line has been attached to the valve to direct the discharge
to an open drain. Failure to take this precaution could mean contact with extremely hot water passing out the valve
during this checking operation.
CAUTION
Inspect the operation of the combustion system monthly. Use the following procedure to
inspect the combustion system.
1. Turn off the main power switch of the water heater.
2. Adjust the thermostat to the Min. setting.
3. Remove the top of the combustion surround by unlatching it.
4. While observing the ignition module, turn on the main power switch.
5. Adjust thermostat to the Max. setting.
6. Watch the LED’s light as the controller goes through the S-OP as previously
described.
7. Upon ignition, observe the main burner flame.
8. Readjust thermostat to previous setting.
9. Replace combustion surround top and latch it securely in place.
COMBUSTION
SYSTEM
INSPECTION
48