American Dryer Corp. AD-120ES - Manual (Page 35)

113386 - 14 www.amdry.com 31
K. 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. 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 basket (tumbler) starts in the clockwise direction. Additionally, check the direction
of the blower motor (impellor/fan) to ensure that the blower motor (impellor/fan) rotates in the clockwise
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 when viewed from the back
of the dryer must turn in the counterclockwise direction, otherwise the dryer efficiency will be
drastically reduced and premature component failure can result.
5. Heat Circuit Operational Test
a. Gas Models
1) 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.
2) The dryer is equipped with a 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 “START” key).
NOTE: During the purging period, check to be sure that ALL gas shutoff valves are open.
3) 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 pressure is correct and consistent.
NOTE: Water column pressure requirements (measured at the gas valve pressure tap):
Natural Gas ------------------------- 3.5 in WC (8.7 mb, 0.87 kPa).
L.P. Gas ---------------------------- 10.5 in WC (26.1 mb, 2.61 kPa).
IMPORTANT: There is no regulator provided in a 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.
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