Filter
Top Products
11
When a “HEATER FAULT” occurs after the first 25-seconds of the drying cycle, a “CLEAR/STOP” will be sent
to the Phase 5 microprocessor controller (computer), a “FILL” message will be displayed on the Phase 5
microprocessor controller’s (computer’s) display, and both the “HEATER FAULT” push-button and the “END
OF CYCLE” light will flash.
NOTE: If the “HEATER FAULT” reset push-button is pressed any time during the PLC
(Programmable Logic Controller) controlled cool down cycle, the dryer will come to a
stop since the dryer is being attended to by a qualified operator.
“HEATER FAULT” occurs during the following conditions:
Front and/or rear or both airflow switches are in the closed position at the start of a drying cycle.
IMPORTANT: At the start of a drying cycle, the tumbler (basket) will begin to turn and a few
seconds thereafter, the “FAN” signal will be asserted.
IF BOTH AIRFLOW SWITCHES ARE NOT OPEN AT THIS TIME THE
BLOWER WILL NOT START and A “HEATER FAULT” WILL OCCUR.
Both “HEATER FAULT” indicators will flash and the dryer will come to a
complete halt/stop until the “HEATER FAULT” push-button is pressed.
ONE or BOTH BURNERS DO NOT IGNITE
The model ADG-410 dryer has two (2) burner boxes. Each burner box has its own gas valve, Spark Ignitor/
Flame-Probe Assembly, and DSI (Direct Spark Ignition) module.
DSI (Direct Spark Ignition) MODULE
When the dryer calls for heat and ALL dryer safety switches are satisfied, a 24 VAC control signal is supplied to
both DSI modules. The DSI module L.E.D. (light emitting diode) indicators will light “red” for approximately
1.5-seconds of pre-purge, the L.E.D. indicators will light “green.” Each DSI module will energize its respective
gas valve and provide an 8-second spark to its Spark Ignitor/Flame-Probe Assembly. The gas in both burner
boxes should ignite. If ignition does not occur in one or both burners after 8-seconds, the flame will not be sensed
by the Spark Ignitor/Flame-Probe Assembly and the DSI module will go into the “LOCKOUT” mode lighting the
L.E.D. indicator(s) “red” continuously. THERE ARE NO IGNITION RETRIES BY THE DSI MODULE.
Stop the dryer at this point and restart another drying cycle. It may take several restarts to clear the gas supply
piping of air.
NOTE: “HEATER FAULT” will occur during the initial set up of the dryer, indicating that the
burners are not lighting due to air in the gas line.
GAS PRESSURE
The natural gas pressure supplied to the dryer must be between 6 inches (14.92 mb) and 12 inches of W.C. (water
column) - 29.9 mb - pressure. If the supply pressure is above 12 inches water column (29.9 mb) than an external
regulator must be installed to reduce the gas supply pressure to between 6 inches (14.92 mb) and 12 inches of
water column (29.9 mb).