MFC Series Boilers User Manual
CHAPTER 6 – MFC 3000 DUAL FUEL BURNER
Page
50
of
170
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0104_94
12/29/2015
Ph.: 800-526-0288
GF-146
1. With the burner operating at MAX output, increase adjustment pressure by slowly turning
the relative dial clockwise until the burner locks out.
2. Then turn the dial anti-clockwise by 0.8” WC and repeat burner starting to ensure it is
uniform.
3. If the burner locks out again, turn the dial anti-clockwise again by 0.4” W.C.
Figure 6-25: Minimum Gas Pressure Switch
Low Oil Pressure Switch
6.14.6
The low oil pressure switch is factory set to 261 PSI (18 bar). If the oil pressure goes down this
value in the delivery piping, the pressure switch stops the burner. Burner starts again
automatically if the pressure goes above 261 PSI (18 bar) after burner start up.
High oil pressure switch
6.14.7
The high oil pressure switch is factory set to 43.5 PSI (3 bar). If the oil pressure goes above this
value in the return piping, the pressure switch stops the burner. Burner starts again
automatically if the pressure goes down under 43.5 PSI (3 bar) after burner shut down. If a loop
circuit with Px pressure feeds the burner, the pressure switch should be adjusted to Px + 43.5
PSI. Figure 6-26 shows the location of this adjustment.
