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4. Check to insure that the basket (tumbler) starts in the clockwise (CW) direction. Additionally, check the
direction of the blower motor impellor/fan (squirrel cage) to insure that it is operating in the correct
direction (blower motor pulley should be turning in the counter clockwise [CCW] direction). If it is, the
phasing is correct. If the phasing is incorrect, reverse two (2) leads at L1, L2, or L3 of the power supply
connection 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
(CCW) direction, otherwise the effiency of the dryer will be drastically 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 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.
NOTE: During the purging period, check to be sure that ALL gas shut-off valves are open.
2) The dryer is equipped with a Direct Spark Ignition (DSI) system which has internal diagnostics.
If ignition is not established after an 8 seconds (+/- 1 second) spark, 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
then restart the dryer.
3) Once ignition is established, 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 gas valve pressure tap):
Natural Gas ---------- 3.5 - 4.0 Inches W.C.
L.P. Gas -------------- 10.5 - 11.0 Inches W.C.
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.
a. Steam Models
1) Check to insure that the steam damper is functioning properly.