Lochinvar 50-210 Gas valve adjustment procedure, Troubleshooting continued, Service Manual

3Troubleshooting (continued)

Gas valve adjustment procedure

If adjustment of the gas valve is deemed necessary, use the following procedures:

Locate the throttle adjustment screw on the side of the venturi valve (FIG. 3-2). Using a screwdriver, turn the screw a 1/4 turn clockwise to increase CO2 levels or a 1/4 turn counterclockwise to decrease CO2 levels. After performing one adjustment on the valve, follow the Combustion Analysis Procedure on page 40 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 3G on page 40 or replace the gas valve.

Figure 3-2Gas Valve Adjustment

Service Manual

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