Gas Valve Adjustment Procedure - Crest Audio FBN0751 Service Manual

3
Troubleshooting

Gas valve adjustment procedure

Under normal operating conditions this
CAUTION
valve should not need adjusting.
Locate the throttle adjustment screw on the gas valve (see
FIG. 3-2). Using a screwdriver, turn the screw a 1/4 turn
counterclockwise to increase CO
clockwise to decrease CO levels. After one adjustment on
2
the valve, follow the Combustion Analysis Procedure on
page 52 of this manual to measure the combustion.
If combustion is still not within the specified range,
repeat the procedure. This procedure SHOULD NOT
be performed more than four (4) times. If after four (4)
adjustments and the combustion is still not within the
specified range, revisit the possible causes in Table 3H on
page 52 or replace the gas valve.
Figure 3-2 Gas Valve Adjustment
(continued)
levels or a 1/4 turn
2
GAS VALVE 1
GAS VALVE 2
IMG01142
Service Manual
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