MFC Series Boilers User Manual
CHAPTER 9 – MFC 4000/6000 GAS ONLY BURNER
P
OMM-0104_94
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
99
of
170
GF-146
Ph.: 800-526-0288
12/29/2015
CAUTION! Check Motor Rotation
As the burner is not fitted with a device to check the sequence of the phases, the motor rotation
may be incorrect. As soon as the burner starts up, go in front of the cooling fan of the fan motor
and check it is rotating anticlockwise. See Figure 9-10.
If this is not the case:
7. Place the On/Off switch in the
“OFF”
position and wait for the control box to carry out
the switch-off phase;
8. Disconnect the electrical supply from the burner;
9. Invert the phases on the three-phase power supply.
Combustion Air Adjustment
9.4.1
Fuel/combustion air must be synchronized with the relevant servo-motors (air and gas) by
storing a setting curve by means of the electronic cam.
To reduce pressure loss and to have a wider adjustment range, it is best to set the servomotor
to the maximum output used, as near to maximum opening (90°) as possible.
On the gas butterfly valve, the fuel’s partial setting adjustment based on required output, with
the servomotor fully open, is made by using the pressure stabilizer on the gas train.
With O2 control via the relative kit, follow the instructions about commissioning in the specific
handbook for the LMV36.5.
Gas/Air Delivery Adjustment
9.4.2
Adjusting Gas/Air Delivery
1. Slowly open butterfly gas valve to maximum open position.
2. Adjust the required maximum output with the gas pressure stabilizer.
3. Adjust the combustion parameters with the air servomotor and store the maximum
combustion point.
4. Complete the procedure by synchronizing the combustion with the two servomotors and
storing the different setting points.
