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J. PREOPERATIONAL TESTS
ALL dryers are thoroughly tested and inspected before leaving the factory. However, a preoperational test
should be performed before the dryer is publicly used. It is possible that adjustments have changed in transit or
due to marginal location (installation) conditions.
1. Turn on electric power to the dryer.
2. Refer to the Operating Instructions for starting your particular model dryer.
3. GAS MODELS ONLY
a. When a gas dryer is first started (during initial start-up), it has a tendency not to ignite on the first ignition
attempt. This is because the gas supply piping is filled with air, so it may take a few minutes for the air
to be purged from the lines.
b. If the dryer is equipped with a Direct Spark Ignition (DSI) system, the DSI control module has internal
diagnostics. If ignition is not established within three (3) attempts, the heat circuit in the DSI control
module will “LOCKOUT” until manually reset. To reset the DSI system, open and close the main door
and restart the dryer.
c. If the dryer is equipped with a Hot Surface Ignition (HSI) system, the HSI control module has internal
diagnostics. If ignition is not established after the first attempt, the heat circuit in the HSI control
module will “LOCKOUT” until manually reset. To reset the HSI system, open and close the main door
and restart the dryer.
NOTE: Water column pressure requirements (measured at the pressure tap of the gas valve body):
Natural Gas------------------- 3.5 Inches (8.7 mb) Water Column.
Liquid Propane (L.P.) Gas ---- 10.5 Inches (26.1 mb) Water Column.
IMPORTANT: There is no regulator provided in an L.P. dryer. The water column pressure must be
regulated at the source (L.P. tank), or an external regulator must be added to each
dryer.
4. Make a complete operational check of ALL safety related circuits:
a. Door Switch(es)
b. Hi-Limit Thermostats
c. Cycling Thermostat
d. GAS AND ELECTRIC MODELS ONLY - Sail Switch
NOTE: The sail switch can be checked for proper operation by opening the lint drawer. While pushing
the lint drawer switch in, start a drying cycle. The heating unit should not activate (wait
30-seconds). If heat does activate, make the necessary adjustments to the sail switch.