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2) The dryer is equipped with a Hot Surface Ignition (HSI) system, which has internal diagnostics. If
ignition
is not established after the first attempt, the heat circuit HSI module will LOCKOUT until
it is manually reset. To reset the HSI system, open and close main door and restart dryer (press the
START key).
NOTE: During the purging period, check to be sure that ALL gas shutoff valves are open.
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 (W.C.) pressure is correct and consistent.
NOTE: Water column pressure requirements (measured at the gas valve pressure tap)...
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.
b. Steam Models
1) Check to insure that the steam damper is functioning properly.
a) 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 bottom illustration on
page 30 for air adjustment instructions.
6. Make a complete operational check of ALL safety-related circuits (i.e., lint drawer switch, and sail switch
on gas models).
NOTE: To check for proper sail switch operation, open the main door and while holding main door
switch plunger in, start the dryer. The dryer should start but the heat circuit should not be
activated (on). If the heat (burner) does activate, shut the dryer off and make the necessary
adjustments.
7. A reversing basket (tumbler) dryer should never be operated with less than a 79 lb (35.83 kg) load (dry
weight). The size of the load will affect the coast-down and dwell (stop) times. The basket (tumbler) must
come to a complete stop before starting in the opposite direction.
a. Microprocessor Controller (Computer) Dryer Models
1) Spin and stop are not adjustable in the Automatic Mode and have been preprogrammed into the
microprocessor controller (computer) for 150-seconds spin time in the forward direction and
120-seconds in the reverse direction with a 5-second dwell (stop) time.
2) Spin and stop times are adjustable in the Manual (timed) Mode.
b. Dual Timer Dryer Models