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1. Major Burner Components
a. Burner Controller Module (BCM)
The BCM provides effective burner flame safeguard control through adjustable purge and trial-for-
ignition timing. The BCM ensures that
ALL
dryer safety switch circuits are closed, delays ignition to
allow the combustion chamber to vent, and ensures that a healthy pilot flame is established before
opening the main gas valves. Five (5) light emitting diodes (L.E.D.s) on the cover of the BCM allow for
easy troubleshooting. Dip switches on the back of the module allow for easy programming.
1) Dip Switches Selections
a) Loosen the two (2) screws on the burner control module cover and pull the module cover off of
its base. The dip switches are on the back of the cover.
Switch #1 – Recycling Mode
With this switch in the “ON” position, the burner will recycle the ignition sequence once during
each drying cycle after a burner fan air switch or main flame failure, but only if the failure
occurs more than 35-seconds after ignition. If this switch is “OFF”, the burner will lock out at
once.
Switch #2 – Intermittent Pilot
This switch is “ON” for intermittent pilot or “OFF” for interrupted pilot.
ADC
utilizes intermittent
pilot so that the pilot flame stays lit during the entire drying cycle. With interrupted pilot, the pilot
flame would go out once the main flame is established. This is used mainly on oil burners lit by
a gas pilot.
Switch #3 – Trail-for-Ignition (TFI) Time
When this switch is “ON” a TFI of 10-seconds is set. If it is in the “OFF” position, the TFI is
5-seconds. The trial for ignition time is the length of time that the pilot is given to light. A
10-second TFI is best for the dryer.
Switch #4, Switch #5, Switch #6, Switch #7, Switch #8 – Purge Time
Switch #8 is in the “ON” position, and switch #4, switch #5, switch #6, and switch #7 are in the
“OFF” position. This gives a purge time of 0-seconds.
