Bradford White UCG100H199 Installation & Operation Manual page 38

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.
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.
Contact your water supplier or local plumbing inspector on how to control this situation.
Above all, do not plug the temperature and pressure relief valve. This is not a solution and can create a hazardous
situation.
VENT AND AIR INTAKE SYSTEM
Examine the vent and air intake system every 3 months. Points of inspection are as follows:
1. Check for obstructions and/or deterioration of vent piping and vent terminal. Replace immediately where needed.
2. Vent pipe and vent terminal screen should be cleaned of any foreign material. The screen is located inside the vent
terminal outlet and is accessible from the outside of the vent terminal elbow. Do not reach inside the vent terminal
when the water heater is in operation.
3. Check all venting system connections for leakage and reseal as required.
COMBUSTION SYSTEM INSPECTION
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 ignition display as the controller goes through the sequence of operation 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.
Do not run out of propane gas. Damage to the water heater may occur.
CAUTION
WARNING
WARNING
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