MFC Series Boilers User Manual
CHAPTER 8 – MFC 4000/6000 DUAL FUEL BURNER
Page
88
of
170
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0104_94
12/29/2015
Ph.: 800-526-0288
GF-146
Figure 8-24: Air Pressure Switch Connection
Maximum Gas Pressure Switch Adjustment
8.15.5
Adjust the maximum gas pressure switch shown in Figure 8-25 after having performed all other
burner adjustments with the maximum gas pressure switch set to the end of the scale.
Adjusting Maximum Gas Pressure Switch
1. With the burner operating at MAX output, reduce the adjustment pressure by slowly turning
the adjustment dial anticlockwise until the burner locks out.
2. Then turn the dial clockwise by 0.8” WC and repeat burner firing.
3. If the burner locks out again, turn the dial again clockwise by 0.4” W.C.
Figure 8-25: Maximum Gas Pressure Switch
Minimum Gas Pressure Switch Adjustment
8.15.6
Adjust the minimum gas pressure switch shown in Figure 8-26 after having performed all the
other burner adjustments with the pressure switch set at the start of the scale.
Adjusting the Minimum Gas Pressure Switch
