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I. 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. 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
: Dryers are equipped with a Direct Spark Ignition (DSI) system, which has internal diagnostics.
If ignition
is not
established after one (1) time, the heat circuit in the DSI module will lockout
until it is manually reset. To reset the DSI system, open and close the main door and restart
the dryer.
a. A gas pressure test
should be
taken at the gas valve pressure tap of each dryer to assure that the
water column (W.C.) pressure is correct and consistent.
NOTE
: Water column pressure requirements (measured at the pressure tap of the gas valve body):
Natural Gas ----------------- 3.5 Inches Water Column.
Liquid Propane (L.P.) Gas --- 10.5 Inches 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 Switches
b. Hi-Limit Thermostats
c. Cycling Thermostat
d. Sail Switch
NOTE
: The sail switch can be checked for proper operation by opening the lint door while heating
circuit (gas burner) is active (on). The heating unit should shut off within a few seconds. If not,
make necessary adjustments to the sail switch.
