Dexter Laundry SWD EXPRESS - Dryer (On-Premise) - Manual (Page 10)

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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 when 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 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 will shut off for 15 seconds. The control will attempt to ignite two
more times in a similar manner. If the gas fails to ignite after three tries, 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, allowing the dryer to come to
a stop for 15 seconds, closing the door, and pushing the Start switch. The dryer will then repeat
the ignition trial cycle.
DRYER SHUTDOWN
To render the dryer inoperative, turn off the main gas shut-off valve and disconnect electrical
power to the dryer.