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WARNING
Fire or Explosion Hazard.
Can cause severe injury, death or property
damage.
Follow these warnings exactly:
1. To avoid dangerous accumulation of fuel gas,
turn off gas supply at the appliance service
valve before starting installation and perform
the Gas Leak Test after completion of
installation.
2. Always install a sediment trap in gas supply
line to prevent contamination of ignition
system control.
3. Follow the appliance manufacturer
instructions if available; otherwise, use these
instructions as a guide.
WARNING
Scalding Hazard.
Can cause burns, severe injury or death.
Always use a direct replacement sensor
assembly when replacing a temperature sensor.
Location
The WV8860 is mounted on the outside of the water
heater tank. See Fig. 2.
Fig. 2. Mounting the WV8860 on the water heater tank.
Install Control to Water Tank
1. To install the water heater control, screw the
assembly into spud until the bracket is square. Use
a maximum torque of 31 ft.-lbs. plus one turn.
2. Follow steps in the Connect Gas Supply section.
IMPORTANT
These water heater system controls are shipped
with protection for the inlet and outlet tappings.
Do not remove the protection until you are ready
to connect the piping.
Connect Gas Supply
All piping must comply with local codes and ordinances
or with the National Fuel Gas Code (ANSI Z223.1 NFPA
No. 54), whichever applies. Tubing installation must
comply with approved standards and practices.
MOUNTING
ACCESS TO TANK
M35066A
WV8860C WATER HEATER CONTROLS
1. Use a new, properly reamed pipe free from chips. If
tubing is used, make sure the ends are square,
deburred and clean. All tubing bends must be
smooth and without deformation.
2. Ensure that gas supply is turned off.
3. Run pipe or tubing to the water heater control. If
tubing is used, obtain a tube-to-pipe coupling to
connect the tubing to the control.
4. Install a sediment trap in the supply line to the
water heater control. See Fig. 3.
PIPED
DROP
GAS
SUPPLY
HORIZONTAL
3 IN.
(76 MM)
MINIMUM
DROP
HORIZONTAL
1
RISER
3 IN.
(76 MM)
MINIMUM
WARNING
EXPLOSION HAZARD.
FAILURE TO FOLLOW PRECAUTIONS CAN
RESULT IN A GAS-FILLED WORK AREA.
SHUT OFF THE MAIN GAS SUPPLY BEFORE REMOVING END CAP.
TEST FOR GAS LEAKAGE WHEN INSTALLATION IS COMPLETE.
1
ALL BENDS IN METALLIC TUBING SHOULD BE SMOOTH.
Fig. 3. Install a sediment trap in the supply line.
WARNING
Explosion Hazard.
Can cause severe injury, death or property
damage.
Check for gas leaks with soap and water solution
any time work is done on a gas system.
5. Apply a moderate amount of good quality pipe
compound, leave two end threads bare. Do not use
pipe compound on the outlet. See Fig. 4.
6. Remove the seals over the water heater control
inlet and outlet, if necessary.
7. Connect the pipe to the water heater control inlet
and outlet. Use a wrench on the square end of the
water heater control. Maximum torque on the inlet
is 40 ft-lbs.; maximum torque on the outlet is 30 ft-
lbs.
8. Position compression fitting in pilot outlet and
engage threads. See Fig. 5 for controls and con-
nections. Turn until finger tight, then tighten one
more turn with a wrench. Do not overtighten.
3
M35064
34-00019—03
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