Burnham FREEDOM FCM120 Installation, Operating And Service Instructions page 50

7) Start the boiler using the lighting instructions on page 49. After the boiler is powered up, it should go through the following
sequence.
Sequence Display
U.125
1 or Blank
0.SWT
2
(After call for heat from heating thermostat)
A.SWT
3
5.SWT
4
1.SWT
5
2.SWT
6
3.SWT
7
8) Upon initial start-up, the gas train will be fi lled with air. Even if the gas line has been completely purged of air, it may take
several tries for ignition before a fl ame is established. If more than 5 tries for ignition are needed, it will be necessary to
press the reset button to restart the boiler. Once a fl ame has been established for the fi rst time, subsequent calls for burner
operation should result in a fl ame on the fi rst try.
9) Inspect the fl ame visible through the window. On high fi re the fl ame should be stable and mostly blue (Fig.11.1). No yellow
tipping should be present; however, intermittent fl ecks of yellow and orange in the fl ame are normal.
10) Check the inlet pressure and adjust if necessary. Verify that the inlet pressure is between the upper and lower limits shown
on the rating plate with all gas appliances on and off.
THE OUTLET PRESSURE FOR THE GAS VALVE HAS BEEN FACTORY SET
AND REQUIRES NO FIELD ADJUSTMENT. THIS SETTING IS SATISFACTORY
FOR BOTH NATURAL GAS AND PROPANE. ATTEMPTING TO ADJUST THE
OUTLET PRESSURE MAY RESULT IN DAMAGE TO THE GAS VALVE AND
CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.
50
Meaning
Checking internal software (power-up only)
SWT
Boiler in standby. = Supply Water Temp. No call for heat.
Self-Check on Start-up
Blower and circulator on. Checking for adequate air fl ow.
Prepurge
Trial for ignition
Flame established. Boiler responding to a call for heat.
Figure 11.1: Burner Flame
WARNING