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Cleaning the Combustion Chamber
and Flame-trap
1. Follow procedure outlined in "Removing the
Manifold Assembly".
2. Use a vacuum cleaner/shop vac to remove all loose
debris in the combustion chamber and flame-trap.
See Figure 26.
3. Reassemble following the procedure under
"Replacing the Manifold Assembly".
Replacing the Manifold Assembly
Explosion Hazard
Tighten both manifold door screws
securely.
Remove any fiberglass between gasket
and combustion chamber.
Replace viewport if glass is missing or
damaged.
Replace two piece wire connector if
missing or removed.
Replace door gasket if damaged.
Failure to do so can result in death,
explosion, or fire.
1. Check the door gasket for damage or imbedded
debris prior to installation.
2. Inspect the viewport for damage and replace as
required.
3. Insert the manifold assembly into the burner
compartment making sure that tab of the manifold
tube engages in the slot of the bracket inside the
combustion chamber (Figure 26). The tab is located
at the bottom of the burner for L.R models.
FI Bracket
Figure 26 _, , IIHII _" T_
Combustion Chamber u_J
4. Inspect the door gasket and make sure there is no
fiberglass insulation between the gasket and the
combustion chamber.
.
.
Replace the two (2) screws which secure the
manifold assembly door to the combustion
chamber. Tighten securely. There should be no
space between the gasket part of the manifold door
and combustion chamber. Do not operate the
water heater if the door gasket is not sealed.
Reconnect the manifold tubing, pilot tubing, and
thermocouple to the thermostat. Do not cross-
thread or apply any thread sealant to these fittings.
Note: L R gas systems use reverse (left-
hand) threads on the manifold tube.
,, The thermocouple nut should be started and
turned all the way in by hand. Note: These are
left-hand threads. An additional quarter turn
with a 7/16" open-end wrench will then be
sufficient to seat the Iockwasher.
7. Reconnect the igniter wire.
8. Turn gas supply on and refer to the "Lighting
Instructions" on page 17.
9. Check for leaks. Use a chloride-free soap and
water solution (bubbles forming indicate a leak) or
other approved method. All leaks must be fixed
immediately.
10. Replace the outer door.
23
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