American Dryer Corp. AD-202, Operation Manual, Page: 41 / 62

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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. Make sure the main door is closed and the lint drawer is securely in place.
3. Refer to the Operating Instructions for starting your particular model dryer.
4. Check to ensure that the tumbler starts in the clockwise (CW) direction. Additionally, check the direction
of the blower motor impellor (fan) to ensure that the impellor (fan) rotates in the clockwise (CW) direction
as viewed from the front. If it is, the phasing is correct. If the phasing is incorrect, reverse two (2) of the
leads at L1, L2, or L3 of the power supply connections made to the dryer.
IMPORTANT: Dryer blower motor/pulley that drives the impellor/fan (squirrel cage) when viewed
from the back of the dryer must turn in the counterclockwise (CCW) direction,
otherwise the dryer efficiency
will be drastically reduced and premature component
failure can result.
5. Heat Circuit Operational Test
Gas Models
a. When the dryer is first started (during initial start-up), the burner has a tendency not to ignite on the first
attempt. This is because the gas supply piping is filled with air, so it may take a few minutes for this air
to be purged from the lines.
b. The dryer is equipped with a Direct Spark Ignition (DSI) system, which has internal diagnostics. If
ignition is not established after three (3) attempts, the heat circuit DSI module will LOCKOUT until it is
manually reset. To reset the DSI system, open and close the main door and restart the dryer (press the
“ENTER/START” key).
NOTE: During the purging period, check to be sure that ALL gas shutoff valves are open.
c. Once ignition is established, a gas pressure test should be taken at the gas valve pressure tap of each
dryer to ensure that the water column (W.C.) pressure is correct and consistent.
NOTE: Water column pressure requirements (measured at the gas valve pressure tap):
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.