Burnham 101008-01R1-2/07 manual Swt

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	Meaning
1	U.125 or Blank	Checking internal software (power-up only)
2	0.SWT	Boiler in standby. SWT = Supply Water Temp. No call for heat.
(After call for heat from heating thermostat)
3	A.SWT	Self-Check on Start-up
4	5.SWT	Blower and circulator on. Checking for adequate air flow.
5	1.SWT	Prepurge
6	2.SWT	Trial for ignition
7	3.SWT	Flame established. Boiler responding to a call for heat.

8)Upon initial start-up, the gas train will be filled with air. Even if the gas line has been completely purged of air, it may take several tries for ignition before a flame 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 flame has been established for the first time, subsequent calls for burner operation should result in a flame on the first try.

9)Inspect the flame visible through the window. On high fire the flame should be stable and mostly blue (Fig.11.1). No yellow tipping should be present; however, intermittent flecks of yellow and orange in the flame are normal.

Figure 11.1: Burner Flame

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.

WARNING

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.

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