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PILOT ADJUSTMENT
(ALL MODELS)
1. Light the pilot as outlined under Lighting Pilot
in the Installation and Operation manual for
the appropriate model.
2. Locate the pilot adjustment screw on the
supply end of pilot manifold pipe.
3. With a flat blade screwdriver, turn the pilot
adjustment screw counterclockwise to
increase or clockwise to decrease gas flow.
The flame should only be high enough to
ignite the burner in less than 4 seconds.
BURNER VENTURI AIR SHUTTER
ADJUSTMENT
[GHCB40 AND HCB2(B)]
The gas burners have a disk type air shutter. The disk
type is used on cast iron burners. All burners are
tested and the air shutters are set at the factory prior
to shipment. However, fine tuning adjustments may
be necessary.
When using natural gas, the air shutter will be
approximately 50% open. On propane (LP), the air
shutter will be approximately 90% open.
1. For GHCB40 remove the burner box cover as
outlined under Covers, Panels and Handles
in Removal and Replacement of Parts Section
of this manual.
2. For HCB2(B) remove the burner box cover as
outlined under Covers, Panels and Handles in
Removal and Replacement of Parts Section of
this manual.
3. Loosen the air shutter adjustment screw.
4. Turn the burner on . If the flame is soft, lazy or
yellow, there is not enough primary air and
the air shutter needs to be opened up. If the
flame is lifting off the burner, there is too
much primary air and the air shutter needs to
be closed down.
5. Rotate the air shutter so that a blue flame
without any yellow tipping is seen across the
burner.
6. Once the proper adjustment is made, carefully
tighten the adjustment screw without moving
the air adjuster.
7. Install front covers when complete.