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7. DRYER IGNITION (SOLID STATE IGNITION). The solid state ignition system lights the main burner gas by
spark. The gas is ignited and burns only hen the gas-valve relay (in the electronic controller) calls for heat. The
procedure for first-time starting of a dryer is as follows.
A. First, review and comply with the "Warnings About Use and Operation" found on the inside front cover of this
manual. Be sure the electrical power supply is connected correctly. The white wire is to be connected to the
white wire (common) in the junction box and the black wire to the black wire (power leg). The dryer MUST be
properly grounded.
B. Make sure all gas supply lines are purged of air. Close the main gas shut-off valve and wait for five minutes
before turning the valve back on.
C. Turn on the main electrical power switch. The dryer may be started by following the "Operating Instructions"
found later in this manual.
D. Natural gas and liquefied petroleum gas fired dryers both operate in the same manner. When the gas-valve
relay contacts are closed (indicating a demand for heat), the solid state ignition control will automatically supply
energy to the redundant gas valve. Spark will continue until a flame is detected by the sensing probe, but not
longer than 10 seconds. If the gas fails to ignite within 10 seconds, the gas valve closes and the system will "lock
out". No further attempts at ignition will be performed automatically. It is then necessary to interrupt electrical
power to the ignition system before making another attempt at igniting the burners. This can be done by opening
the dryer door and allowing the dryer to come to a stop for 15 seconds, then closing the door and pushing the
"Start" button. The dryer will then repeat the ignition trial cycle.
8. MAIN BURNER ADJUSTMENT. The primary air shutter of each main burner must be properly adjusted for the
correct air-gas ratio. Loosen the shutter locking screws. Adjust the shutter by closing it sufficiently to give a blue flame
with a yellow tip. Next open the shutter until the yellow tips are at a minimum. After adjustment, securely lock each
shutter in position by tightening the shutter locking screws.
To render the dryer inoperative, turn off the main gas shut-off valve and disconnect electrical power to the dryer.
Both drums are controlled by the electronic controller at the left midpoint of the dryer. With the exception of
acknowledging deposited coins the controller is two-in-one with the upper display and lights dedicated to the upper
drum and the lower display and lights dedicated to the lower drum.
The green light to the left of the displays flashes to acknowledge money deposited.
Each individual display shows vend price when its drum (upper or lower) is idle. Purchased time is shown after a
drum (upper or lower) is selected.
These displays flash at the end of cycle when time has expired, until the door is opened.
At the top and bottom are red lights indicating the drying program selected by the user.
The drying temperature will be displayed when a drum is in use if two switches are pressed at the same time, the
start switch and the switch for the temperature which has been selected.
All programmed data is protected from power interruptions of any length and the customer's individual cycle is
protected up to 3 seconds. This is done without batteries.
8
DRYER SHUTDOWN
DESCRIPTION OF CONTROLS
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