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American Dryer Corp.
113329 - 14
J. PREOPERATIONAL TEST
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. Installer must instruct the user on how to correctly operate the dryer
before leaving.
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.
NOTE: During the purging period, check to be sure that ALL gas shutoff valves are open.
NOTE: Gas model dryers are equipped with an ignition system, which has internal diagnostics. If
ignition is not established after one (1) time, the heat circuit in the ignition module will
attempt two (2) more ignitions (total of three [3] ignition attempts). If there is no flame after
the third ignition attempt the module will lockout until it is manually reset. To reset the
ignition system, open and close the main door and restart the dryer.
b. A gas pressure test should be taken at the gas valve pressure tap of each dryer to assure that the water
column pressure is correct and consistent.
NOTE: Water column pressure requirements (measured at the pressure tap of the gas valve body):
Natural Gas _______ 3.5 In WC (8.7 mb).
Propane Gas _______ 10.5 In WC (26.2 mb).
IMPORTANT: There is no regulator provided in a propane dryer. The water column pressure must
be regulated at the source (propane 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