American Dryer Corp. D170 - Manual (Page 19)

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Preparation for Operation/Start-Up __
The following items should be checked before attempting to
operate the dryer:
• Read all “CAUTION,” “WARNING,” and “DIRECTION”
labels attached to the dryer.
• Check incoming supply voltage to be sure that it is the
same as indicated on the dryer data label. In the case of
208 VAC or 230/240 VAC, the supply voltage must
match the electric service exactly.
• Gas Models – check to ensure 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 adjusted at the factory prior to shipping.
However, each sail switch adjustment must be checked
to ensure that this important safety control is functioning.
• Check to be sure that the drive belts between the idler
pulley and the motor pulley have been reconnected.
Note
The drive belts were disconnected at the factory
prior to dryer shipment.
• Gas Models – be sure that all gas shutoff valves are in
the open position.
• Be sure all back panels (guards) and electric box covers
have been replaced.
• Check all service doors to ensure that they are closed
and secured in place.
• Be sure the lint drawer is securely in place.
Note
Lint drawer must be all the way in place to
activate the safety switch otherwise the dryer will
not start.
• Rotate the tumbler (drum) by hand to be sure it moves
freely.
• Check bolts, nuts, screws, terminals, and fittings for
security.
• Gas Models and Steam Models – check to ensure air
supply (80 psi [5.51 bar]) is connected to the dryer.
• Steam Models – check to ensure all steam shutoff valves
are open.
• Steam Models – check steam damper operation.
• Check tumbler bearing setscrews to ensure they are all
tight.
Preoperational Test ___________________
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.
Turn on electric power to the dryer.
Make sure the main door is closed and the lint drawer is
securely in place.
Refer to the Operating Instructions for starting your particular
model dryer.
Check to ensure that the 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
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 (squirrel cage) 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.
Heat Circuit Operational Test
Gas Models
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.
The dryer is equipped with a DSI system, which has internal
diagnostics. If ignition is not established after 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.
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)
L.P. Gas _______ 10.5 in WC (26.1 mb)
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.
Steam Models
Check to ensure that the steam damper is functioning
properly.
The steam damper should not “slam” (open or closed) when
it reaches the end of (piston) travel. Additionally, the steam
damper should not bind and/or stop during travel. If either of
these conditions occur, the flow control must be adjusted.
Refer to the illustration on page 16 for air adjustment
instructions.
Make a complete operational check of all safety related
circuits (i.e., lint drawer switch and sail switch on gas models).
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