Operation/start-up, Preparation, Preoperational tests – Maytag MDG120 User Manual
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The following items should be checked before
attempting to operate the dryer:
. Read and follow
ING”, and “DIRECTION” labels attached to
2. Check incoming supply voltage to be sure
that it is-the same as indicated on the dryer
data label located in the front top console
3. GAS MODELS - check to assure that the
dryer is connected to the type of heat/gas
indicated on the dryer data label.
GAS MODELS - the sail switch damper
assembly was installed and preadjusted at
the factory prior to shipping. However, each
sail switch adjustment must be checked to
assure that this important safety control is
5. GAS MODELS - be sure that ALL gas shut
off valves are in the open position.
6. Be sure
back panels (guards) and
electric box covers have been replaced.
service doors to assure that
they are closed and secured in place.
8. Be sure lint drawer is securely in place.
NOTE: LINT DRAWER MUST BE ALL THE
WAY IN PLACE TO ACTIVATE SAFETY
SWITCH. OTHERWISE THE DRYER WILL
9. Rotate the basket (tumbler/drum) by hand
to be sure it moves freely.
10. Check bolts, nuts, screws, terminals, and
fittings for security.
. Check tumbler bearing set screws to insure
ALL dryers are thoroughly tested and inspected
before leaving the factory. However, a preopera-
performed before the
dryer is publicly used. It is possible that adjust
ments have changed in transit or due to mar
ginal location (installation) conditions.
. 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 insure that the basket (tumbler)
starts in the clockwise (CW) direction.
Additionally, check the direction of the
blower motor impellor (fan) to insure that
impeller (fan) rotates in the clockwise (CW)
direction as viewed from the front. If it is, the
. phasing is correct, if the phasing is incor
rect, reverse two (2) of the leads at LI, L2,
or L3 of the power supply connections
made to the dryer.
Dryer blower motor impellor/fan
as viewed from the front must turn in the clock
wise (CW) direction, otherwise dryer efficiency
will drastically be 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 ten
dency not to ignite on the first attempt.
This is because the gas supply piping is
filled with air, so it may take a few min
utes for this air to be purged from the
2) The dryer is equipped with a direct spark
ignition (DSI) system which has internal
diagnostics. If ignition is not established
after the first attempt, the heat circuit
DSI module will lock out until it is manu
ally reset. To reset the DSI system, open
and close main door and restart dryer
(press the “ENTER/START’ key).
During the purging period, check
to be sure that
gas shut-off valves
3) Once ignition is established, a gas
taken at the
gas valve pressure tap of each dryer to
assure that the water column pressure is
correct and consistent.
Water column pressure require
ments (measured at the gas valve
pressure t a p ) . . .
NATURAL GAS 3.5 - 4.0 INCHES W.C.
10.5-11.0 INCHES W.C.