State PR6 40 NHDST2 - Manual (Page 27)

Periodic Maintenance (cont’d)
Service
If a condition persists or you are uncertain about the oper-
ation of the water heater, let a qualified person check it
out. Call the local utility and/or plumbing contractor.
WASHER
HANDLE AND
CAP ASSEMBLY
Draining
The water heater should be drained if being shut down
during freezing temperatures. Also periodic draining and
cleaning of sediment from the tank may be necessary.
1. Turn the gas control knob to the “OFF” position.
2. CLOSE the cold water inlet valve to the water heater.
3. OPEN a nearby hot water faucet and leave open to
allow for draining.
4. Connect a hose to the drain valve and terminate to an
adequate drain.
5. OPEN the water heater drain valve to allow for tank
draining.
NOTE: If the water heater is going to be shut down
and drained for an extended period, the drain valve
should be left open with hose connected allowing
water to terminate to an adequate drain.
6. Close the drain valve.
7. Follow instructions in the “Filling The Water Heater”
section.
8. Follow the Lighting instructions in the “Lighting” sec-
tion to restart the water heater.
Drain Valve Washer
Replacement
NOTE: For replacement, use a 17 ⁄
32
″″ x
13 ⁄
64
″″ x
1 ⁄
8
″″ thick wash-
er available at your nearest hardware store.
1. Turn “OFF” gas supply to water heater.
2. Follow “Draining” instructions.
3. Turning counter clockwise, remove the hex cap below
the screw handle.
4. Remove the washer and put the new one in place.
5. Screw the handle and cap assembly back into the
drain valve and retighten using a wrench. DO NOT
OVER TIGHTEN.
6. Follow instructions in the “Filling The Water Heater”
section.
7. Check for leaks.
8. Follow the lighting instructions in the “Lighting” sec-
tion to restart the water heater.
Failure to install and maintain a new properly listed tem-
perature-pressure relief valve will release the manufac-
turer from any claim which might result from excessive
temperature or pressure.
TEMPERATURE-PRESSURE
RELIEF VALVE
DISCHARGE PIPE
Temperature-Pressure Relief
Valve Operation
The temperature-pressure relief valve must be manually
operated at least once a year.
27
WARNING
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 manually dis-
charged will not cause any property damage because the
water may be extremely hot.
If after manually operating the valve, it fails to complete-
ly reset and continues to release water, immediately
close the cold water inlet to the water heater, follow the
draining instructions, and replace the temperature-pres-
sure relief valve with a new one.
WARNING
If the temperature-pressure relief valve on the appliance
weeps or discharges periodically, this may be due to
thermal expansion. Your water heater may have a check
valve installed in the water line or a water meter with a
check valve. Consult the water supplier and/or plumbing
contractor for further information. Do not plug the tem-
perature-pressure relief valve.