30 • Residen al Standard Gas Water Heater Use and Care Guide
MAINTENANCE
30 • Residen al Standard Gas Water Heater Use and Care Guide
Removing and Replacing the
Gas Control Valve/Thermostat
IMPORTANT: The gas control valve/
thermostat is a standard valve with
wire leads that connect to a thermal
switch.
Removing the Gas Control Valve/
Thermostat:
1
Turn the gas control/tem-
perature knob to the “OFF”
posi on.
Figure 48 - Gas control/valve.
2
Turn off the gas at the
manual shut-off valve on the
gas supply pipe.
Figure 50 - Gas valve in “off” position.
3
Drain the water heater. Refer
to the “Draining and Flushing
the Water Heater” sec on (see
page 28) and follow the procedure.
4
Disconnect the
A
igniter
wire from the igniter lead
wire. Use needle nose pliers
to disconnect the
B
red (+) and white
(-) thermopile wires. Disconnect
C
pilot tube (7/16” wrench) and
D
manifold tube (3/4” wrench) at the
gas control valve/thermostat. NOTE:
L.P. Gas systems use reverse (le -hand)
threads on the manifold tube.
A
C
D
B
Figure 52 - Gas valve connections.
5
Disconnect the ground joint
union in the gas piping.
Disconnect the remaining
pipe from the gas control valve/
thermostat.
Figure 54 - Ground joint union connection.
6
To remove the gas control
valve/thermostat, thread a 4”
sec on of gas pipe into the
inlet and use it to turn the FVIR Safety
System Opera onal Checklist TROU-
BLESHOOTING CHART gas control
valve/thermostat (counterclockwise.)
Do not use pipe wrench or equivalent
to grip body. Damage may result,
causing leaks. Do not insert any sharp
objects into the inlet or outlet connec-
ons. Damage to the gas control valve/
thermostat may result.
Figure 56 - Gas control/valve with threaded pipe.
Replacing Gas Control Valve/Thermostat:
To replace the gas control valve/thermo-
stat, reassemble in reverse order. When
replacing the gas control valve/
thermostat, thread a 4” sec on of gas pipe
into the inlet and use it to turn the gas
control valve/thermostat (clockwise.)
DO NOT OVER TIGHTEN, damage may
result.
• Be sure to use approved thread sealant
tape or pipe joint compound on the gas
piping connec ons and fi ng on
the back of the gas control valve that
screws into tank.
• Be sure to remove the pilot ferrule nut
from the new gas control valve/thermostat.
Figure 58 - Gas valve in “on” position.
• Turn the gas supply on and check
for leaks. Test the water heater with
the main burner on by brushing on an
approved noncorrosive
leak detec on solu on. Bubbles forming
indicate a leak. Correct any leak found.
• Be sure tank is completely fi lled with
water before ligh ng and ac va ng the
water heater. Follow the
“Ligh ng Instruc ons” on page 23.
• If addi onal informa on is required,
contact our Technical Assistance Hotline
at 1-800-722-2101.
MAINTENANCE
Содержание GSL050-40
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