Burnham K2WT Residential, Installation, Operating And Service Instructions

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Figure 11.1: Location of Manual Air Vent
XI. Start-Up and Checkout
(continued)
FLAME ROD
ATTACH 1/4" ID CLEAR
TUBING TO HOSE BARB
AND ROUTE TO SAFE PLACE
AWAY FROM CONTROLS
BEFORE OPENING VENT.
MANUAL AIR VENT
12. The boiler should attempt to fire approximately 30 seconds after a call for heat appears. With the
upper front cover removed from the boiler, this try for ignition will appear as an audible spark
(lasting approximately 4 seconds) and an audible click from the gas valve. 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 the boiler does not light after six tries
for ignition, it will enter a “soft lockout” and will wait for one hour before attempting another
ignition sequence. This soft lockout can be reset by interrupting power to the boiler for a few
seconds. Once a flame has been established for the first time, subsequent calls for burner operation
should result in a flame on the first try.
13. If there is a problem that appears before the first try for ignition, or if the boiler fails to light after six
tries for ignition, the blinking “HELP” button is highlighted on the Home screen (Figure 11.2c).
Touching this “HELP” button will take the user to the Diagnostics menu where the cause of the
problem can usually be found by pressing the flashing button on each successive screen.
14. Inspect the flame visible through the window. On high fire the flame should be stable and mostly
blue (Figure 11.3). No yellow tipping should be present; however, intermittent flecks of yellow and
orange in the flame are normal.
15. Check the inlet gas pressure. Verify that the inlet gas pressure is between the upper and lower limits
shown on the rating plate with all gas appliances on and off.