MFC Series Boilers User Manual
CHAPTER 11 – MFC 8000/10000 GAS ONLY BURNER
Page
126
of
170
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0104_94
12/29/2015
Ph.: 800-526-0288
GF-146
11.2 Combustion Head Adjustment
WARNING!
Before starting the burner, ensure that the tank return line is not clogged.
The setting of the combustion head depends on the maximum output of the burner.
Adjusting the Combustion Head
In addition to varying air flow depending on the output requested, the air gate valve servomotor
(4) in Figure 11-1 by means of a lifting assembly varies the setting of the combustion head.
This system allows an optimal setting even at a minimum firing rate.
For the same servomotor rotation, combustion head opening can be varied by moving the tie
rod onto holes 1-2-3 in Figure 11-2.
Figure 11-2: Adjusting the Combustion Head
The choice of the hole (1-2-3) to be used is decided on the basis of the diagram in Figure 11-3
against the required maximum output.
Setting is pre-arranged in the plant for the maximum run (hole 3) in Figure 11-2.
When dealing with boilers featuring a strong back pressure, if air delivery is insufficient even
with the damper fully open, you can do this by using a different setting to the one illustrated in
the diagram in Figure 11-3 by moving the tie rod onto the next highest hole numerically
speaking, thus increasing the combustion head’s opening and hence air delivery.
Max burner output
Figure 11-3: Maximum Burner Output
MFC 8000
MFC 10000
