Service Manual
3Troubleshooting
Model 501
Locate the throttle adjustment screw on top of the gas valve, see FIG.
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 36 or replace the gas valve.
Figure 3-4 Gas Valve Adjustment: Model 501
Models 601 - 801
Locate the throttle adjustment screw on top of the gas valve, see FIG.
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 36 or replace the gas valve.
Figure 3-5 Gas Valve Adjustment: Models 601 - 801
THROTTLE
ADJUSTMENT
SCREW
(REMOVE BLUE CAP)
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