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1. Major Burner Components
a. Burner Controller Module (BCM)
The BCM (burner controller module) provides effective burner flame safeguard control through adjust
able purge and trial-for-ignition timing. The BCM insures that ALL dryer safety switch circuits are
closed, delays ignition to allow the combustion chamber to vent, and insures that a healthy pilot flame is
established before opening the main gas valves. Five (5) LED’s (light emitting diodes) 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.
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.
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.
When this switch is “ON” a trial-for-ignition TFI of ten (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 #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.
Switch #4, Switch #5, Switch #6, Switch #7, Switch #8 - Purge Time
Switch #3 - Trail-for-Ignition (TFI) Time
Switch #2 - Intermittent Pilot
Switch #1 - Recycling Mode