Maintenance - Utilitech LET2 Mode D'emploi

3. Open a nearby faucet allowing water to run briefly and then close the faucet. Check pressure
gauge again and make additional screw adjustments as necessary. It may be necessary to
repeat this procedure several times before the pressure can be adjusted to 60 psi or less.
CHECKING EXPANSION TANK AIR CHARGE
1. Shut off main cold water supply valve.
2. Open a nearby faucet allowing water to run until it stops. This indicates pressure has been relieved.
3. Using a tire gauge, check the expansion tank's pre-charge pressure (25 psi). The expansion
tank air charge must be adjusted to match the incoming water pressure. If the air charge pressure
needs to be adjusted upward, use only a manual type tire pump to increase the pressure. If the
air charge needs to be reduced, depress the valve core to release pressure.
4. Open the cold water supply valve.
5. Now the water heater can be put back into operation. Follow instructions found on the water
heater and in the manual.

MAINTENANCE

WATER HEATER TEMPERATURE-PRESSURE RELIEF VALVE
The temperature-pressure relief valve on the water heater must be manually operated at least once a year.
DANGER: Burn hazard. Hot water discharge. Keep clear of relief valve discharge outlet.
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) the
water manually discharged will not cause any property damage or bodily injury. The water may
be extremely hot.
If the valve fails to completely reset and continues to release water after manual operation,
immediately close the cold water inlet to the water heater, follow draining instructions, and replace
the temperature relief valve with a new one.
WEEPING TEMPERATURE-PRESSURE RELIEF VALVE
If the temperature-pressure relief valve on the water heater weeps or discharges periodically, this
may be due to one or more of the following:
1. The temperature-pressure relief valve may have become faulty. Refer to your water heater
manual for more information.
2. The inlet water pressure may be above the recommended 60 psi. Follow the instructions in the
"Adjusting Water Pressure" section.
3. The expansion tank's air charge pressure may not be adjusted to match the incoming water
pressure. Follow the instructions in the "checking Expansion Tank Air Charge" section.
4. If all of the above have been checked, adjusted and/or replaced, turn water heater "OFF" and
contact the local utility.
TEMPERATURE-PRESSURE
RELIEF VALVE
DISCHARGE PIPE
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