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8514-311-001 REV PR
7.1.11 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-relay, in the electronic controller, calls for heat. The procedure for first-time starting of a
dryer is as follows.
1. First review and comply with the "Safety Information" found on the inside front cover of this
manual. Be sure electrical power is connected correctly. The dryer must be properly
grounded.
2. Make sure all gas supply lines are purged of air. Close the main gas shut-off valve and wait for
five minutes before turning it back on.
3. Turn on the main electrical power switch. The dryer may be started by following the "Use,
Operation, and Misuse" section found later in this manual.
4. G20, G25, G30, and G31 fired dryers 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 after a 15 second pre-purge. Sparking
will continue until a flame is detected by the sensing probe, but not longer than 4 seconds. If
the gas fails to ignite in 4 seconds, the gas valve closes and the gas system will "lock out". No
further attempts will be performed automatically. To reset the ignition control, electrical power
to the ignition control must be interrupted. This can be done by opening the dryer door
(stopping the dryer) for 15 seconds. Closing the door and pushing the "Start" button will
repeat the ignition trial cycle.
7.1.12 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 screw. 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.
7.1.13 Dryer Shutdown
To render the dryer inoperative, turn off the main gas shut off valve and disconnect the electrical supply
to the dryer.
INFORMATION
The installer must test the dryer for
operation and instruct the user before
leaving the installation.
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