GF - D 3
Gas Valves
Step 7
Replace and tighten the LO adjustment cover screw.
Step 8
Adjust 2nd stage gas heat by removing the high (HI)
adjustment regulator cover screw (Figure 5).
Step 6
Adjust regulator (Figure 4) until pressure shown on
manometer matches the pressure specified in Table
1. To increase outlet pressure, turn the regulator
adjustment screw clockwise. To decrease outlet
pressure, turn the regulator adjustment screw
counterclockwise. The input should be more than the
nameplate rating and no less than 93% of the
nameplate rating, unless the unit is being de-rated for
high altitude.
Figure 4
Table 1
Figure 5
Figure 6
Step 9
Adjust regulator (Figure 6) until pressure shown on
manometer matches the pressure specified in Table
1. To increase outlet pressure, turn the regulator
adjustment screw clockwise. To decrease outlet
pressure, turn the regulator adjustment screw
counterclockwise. The input should be more than
the nameplate rating and no less than 93% of the
nameplate rating, unless the unit is being de-rated for
high altitude.
Step 10
Replace and tighten the HI adjustment cover screw.
Step 11
Cycle the valve several times to verify regulator setting.
Repeat the steps 5-10 if needed.
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