ADJUSTMENT

PILOT GAS ADJUSTMENT

If the pilot flame is low and does not engulf the bulb of the mercury flame sensor, the system will not energize the main valve. If pilot gas pressure is too high, gas will sputter past the ignition electrode, and may not ignite. High pilot gas pressure may also cause the flame to lift off the burner, causing the flame sensor bulb to sense "low" heat.

To adjust the pilot gas pressure:

Remove the cover screw (see fig. 4).

To REDUCE pilot pressure, turn the pilot adjust screw (beneath the cover screw) clockwise.

To INCREASE pilot pressure, turn the pilot adjust

screw counterclockwise. Replace and tighten cover screw.

Pilot Adjust

Cover Screw

Gasket

Pilot

Adjust

Screw

Figure 4. Pilot gas adjustment

PILOT LIGHTING

Before lighting the pilot burner flame, remove one of pilot generator leads from the valve. This will prevent main gas valve from opening during the pilot lighting procedure, even if thermostat should be calling for heat.

If you need further information about this product, please write to

White-Rodgers Division, Emerson Electric Co.

9797 Reavis Road

St. Louis, MO 63123-5398

Attention: Technical Service Department

Page 4
Image 4
White Rodgers 36C21 specifications Adjustment Pilot GAS Adjustment, Pilot Lighting