American Dryer Corp. AD-385 - Manual (Page 31)

I. PREOPERATIONAL TESTS
ALL dryers are thoroughly tested and inspected before leaving the factory. However, a preopera-
tional 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 Dryers
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 shut-off valves
_________ are open._________________________________________________
NOTE: Gas dryers are equipped with a direct spark Ignition (DSI) system which
has internal diagnostics. If ignition is not established the heat circuit in
the DSI module will lock out until it is manually reset. To reset the DSI
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 - 4.0 -Inches Water Column
L.P. Gas................ 10.5 -11.0 Inches Water Column
IMPORTANT: There is no regulator provided in an L.P. dryer. The water col­
umn pressure must be regulated at the source (L.P. tank), or an
external regulator must be added to each dryer.
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