ULTRA HIGH EFFICIENCY POWER VENT/POWER DIRECT VENT - SERVICE MANUAL
BURNER (CONT)
Burner/Blower Removal (cont)
1/4” Hex Machine Screws
Blower Adapter
BLOWER/BURNER REMOVAL PROCEDURE
(CONT)
9Remove 4 blower adapter 1/4” hex machine screws. Do not over tighten when reinstalling - torque should not exceed 40 inch lbs.
10Remove the blower adapter.
11Be extremely careful when handling the Sight Glass inside the Burner View Port (page 11) this can easily be dropped and lost - and the water heater must have the sight glass in place to operate safely.
12Remove the hot surface igniter - 2 Phillips head screws.
13Remove the blower adapter gasket. Gasket may be reused if not damaged or showing signs of excessive wear.
14Lift the burner up and out.
Blower Adapter Gasket
Sight Glass inside
Burner View Port
Burner |
Hot Surface Igniter
Service Notes - Blower Flange & Blower Adapter Gaskets.
Whenever the blower or burner is removed for service DO NOT overtighten the machine screws that hold the blower flange to the blower adapter (page 12) or the blower adapter to the water heater tank (above). Torque on these screws should not exceed 40 inch lbs.
If these mounting screws are overtightened the gaskets will be squeezed and deformed from their natural shape. This can partially block the flow of the fuel air mixture and cause rough starting, rough operation and ignition failure.
If these gaskets are deformed from overtightening the mounting screws it can also lead to gasket leakage. Hot flue gases leaking from these points can burn up wiring, igniters, and other components.
Technical Literature Department | 13 of 52 | Ashland City, TN © 2008 |
Servicing should only be performed by a Qualified Service Agent |
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