ACCESS COMBUSTION, LLC
WARNING:
Only authorized burner service personnel should start, adjust, or service this equipment!
Rev. 05
Page 9 of 19
B
URNER
S
EQUENCE OF
O
PERATION
Refer to a Specific Burner Management System (BMS) Manual provided with the burner for detailed information
and control sequence timing information.
1.
Burner is energized when demand is activated by heat exchanger limit switch.
2.
Burner motor starts.
3.
Air damper valve opens.
4.
A pre-ignition air purge sequence begins.
5.
Air purge time depends on the control type and is intended to provide 4 to 5 volume air exchanges before
starting the burner.
6.
Air damper valve closes.
7.
Ignition Transformer is energized.
8.
Pilot solenoid valve opens.
9.
Pilot flame is detected by the BMS.
10.
Ignition Transformer is de-energized.
11.
Main Solenoid valve opens.
12.
Pilot Solenoid valve is de-energized.
13.
Main flame is detected by the BMS.
14.
Burner is ready for modulation.
If demand is interrupted
15.
Main Solenoid valve are de-energized.
16.
Air damper valve opens.
17.
A post-ignition air purge sequence begins.
18.
Air purge time depends on the control type.
19.
Air damper valve closes.
20.
Blower is de-energized.
21.
Burner remains in standby mode.
22.
If a fault occurs during the sequence of operation an error message will be displayed on the BMS.
23.
Refer to the specific BMS manual provided with the burner for additional information.
