Gas Conversion - Kenmore 153.336340 Owner's Manual

•
For your safety, the following procedures should be
performed by a qualified technician, as it involves
disconnection of gas piping and leak testing.
• Do not connect a natural gas water heater to an L.P. gas
supply.
Do not connect an L.P. gas water heater to a natural gas
supply.
A. REMOVE THE MANIFOLD/BURNER ASSEMBLY
1. Turn off the gas supply to the water heater at the manual gas
shut-off valve. This valve is typically located beside the water
heater. Note the position of the shut-off valve in the open/on
position then proceed to turn it off.
2. On the lower front of the water heater, locate the gas control
valve/thermostat. Before performing any maintenance, it
is important to turn the temperature dial on the gas control
valve/thermostat to its lowest setting.
3. On top of the gas control valve/thermostat, turn the gas control
knob to the "OFF" position.
4. Remove the outer door.
5. Remove the two screws securing the installed manifold door
assembly to the combustion chamber (Figure 11).
6. Disconnect the thermocoupte (right-hand thread), pilot tube,
the igniter wire from the igniter button, the two connectors
attached to the thermal switch, and manifold tube at the gas
control valve/thermostat. See Figure 11.
7. Grasp the manifold tube and push down slightly to free the
manifold, pilot tube, and thermocoupte.
8. Carefully remove the manifold/bumer assembly from the
burner compartment. NOTE: Be sure not to damage intemal
parts.
B. CONVERT THE GAS CONTROL VALVE/THERMOSTAT
2.
Remove the cap (shown in Figure 12), then remove the
conversion fitting by turning it counter-clockwise with an
adjustable wrench.
Thread the opposite end of the conversion fitting into the
opening by turning it clockwise, then tighten it hand tight.
A. If you are converting the gas control valve/thermostat to
use LP gas (propane), verify that the "LP" arrow on the
fitting is pointing toward the gas control valve/thermostat.
The red band on the fitting should touch the metal boss.
See Figure 12.
GASCONTROLVALVE/THERMOSTAT
MANIFOLD TUBE
MANIFOLD
TUBE
THERMOCOUPLE
VIEW PORT-
PIEZO
IGNITER
BUTTON
PILOT
TUBE
SWITCH
- MANIFOLD
DOOR
MANIFOLD
SCREWS (2)
\ MANIFOLD "7
COMPONENT BLOCK
FIGURE 11.
16
3.
C.
B. If you are converting the gas control valve/thermostat to
use natural gas, verify that the "NAT" arrow on the fitting
is pointing toward the gas control valve/thermostat. The
blue band on the fitting should touch the metal boss. See
Figure 12.
Replace the cap.
INSTALL THE CONVERSION MANIFOLD/BURNER
ASSEMBLY
1. Check the door gasket for damage or imbedded debris prior
to installation.
2. Inspect the view port for damage and replace as required.
3. Insert the conversion manifold/burner assembly into the
burner compartment, making sure that the tip of the manifold
tube engages the slot of the bracket inside the combustion
chamber. NOTE: For 30 gallon models, the LP manifold/
burner assembly is identified by a yellow dot (label) on the
packaging. For 40 gallon models, the LP manifold/burner
assembly is identified by a green dot on the packaging.
4. Inspect the door gasket and make sure there is no fiberglass
insulation between the gasket and the combustion chamber.
5. Replace the two screws that secure the manifold/burner
assembly door to the combustion chamber and tighten
securely. Once the manifold/burner assembly door is tightened,
visually inspect the door gasket between the manifotd/bumer
assembly door and the combustion chamber for spaces or
gaps that would prevent a seal. IMPORTANT: Do not operate
the water heater if the door gasket does not create a seal
between the manifold door and the combustion chamber.
6. During the following procedure, do not cross-thread or apply
any thread sealant to any of the fittings listed below. See
Figure 11. First, reconnect the manifold tubing to the gas
control valve/thermostat. Second, locate the provided ferrule
nut and install it in the gas control valve/thermostat at the
pilot location, hand tight only. Third, insert the pilot tube into
the ferrule nut until it bottoms out, then hold the tube in this
position. Tighten the ferrule nut with a wrench until the crimp
connection seals to the pilot tube. Continue to tighten until the
nut is tight in the gas control valve/thermostat. Finally, start
the thermocouple nut and turn it all the way in by hand. An
additional quarter turn with a 3/8" open-end wrench wilt then
be sufficient to seat the lockwasher. When you are finished,
connect the two wire leads that go to the thermal switch.
Finally, reconnect the igniter wire.
7. Turn gas supply on and refer to the Lighting Instructions.
8. With the burner tit, check the gas control valve/thermostat
supply line, manifold component block, manifold tube, and
pilot tube connections for leaks. Check for leaks by brushing
on an approved non-corrosive leak detection solution.
Bubbles forming indicate a leak. Correct any leak found.
IMPORTANT: All leaks must be fixed immediately.
9. Replace the outer door.
LP GAS:
GAS CONTROL VALVE/ "LP" ARROW POINTS TOWARD THE
THERMOSTAT GAS CONTROL VALVE/THERMOSTAT.
RED BAND TOUCHES METAL BOSS.
CAP
CONVERSION FITTING
_ ATURAL GAS: l
"NAT" ARROW POINTS TOWARD THE GAS
CONTROL VALVE/THERMOSTAT,
BLUE BAND TOUCHES METAL BOSS,
FIGURE 12,