30
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.
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 dryers are equipped with a Direct Spark Ignition (DSI) system, which has internal
diagnostics. If ignition
is
not
established within three (3) times, 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.
b. 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 (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.
4. Make a complete operational check of
ALL
safety related circuits:
a. Door Switch(es)
b. Hi-Limit Thermostats
c. Cycling Thermostat
d.
GAS MODELS ONLY
- Sail Switch
Summary of Contents for MDG75V
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