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NOTE: All HD dryers manufactured by are equipped with the DSI (Direct Spark
Ignition) modules. These are designed to increase dryer efficiency and
to reduce dryer operating costs. The main burner is directly ignited from
a spark electrode. A burning flame provides an electrical path for a small
amount of sensing current to allow gas valve operation. If the main
burner flame extinguishes for amy reason (aside from the thermostatic
control) sensing current will shut down the gas valve and the spark
ignition circuit.
1.
Once flame is established, the spark shuts off, and the main burner flame is
then electronically monitored by means of a sensing spark probe which is
located over the burner. The gas valve remains energized (open).
2.
If no flame is detected within the first 11 seconds the DSI will
go into a safety “lock-out”. The gas valve is energized.
3.
If recovery from a safety lockout requires one of the following:
A. Opening the main door thus interrupting power to the DSI
module and allowing dryer diagnostic trouble shooting.
B. Disconnecting the entire dryer from a power source using a
circuit breaker of a switch.
4.
By closing the main door the ignition circuit will be restored for
another trial of the ignition circuit.
5.
Once the thermostatic control has been satisfied by reaching a
pre-set temperature or the drying timer has been timed out, the
ignition circuit will be de-energized thus extinguishing the flames.
6.
The dryer will continue to run in a cool-down mode without heat. This
process will cool the load to the touch and help to eliminate wrinkling.
7.
The cool - down time is pre-set on some models and manually set
on other dryer models. The cool-down cycle prevents fabric
wrinkles by allowing clothes to reach room ambient temperature
while still in a continuous levitation state until clothes are ready
to be folded or pressed.
Direct-Spark Ignition Operation
DIRECT SPARK
IGNITION
OPERATION
Содержание HD75ST
Страница 11: ...Page 11 75 lb STACK DRYER Outline Dimensions...
Страница 20: ...Page 20 Exhaust Installation Multiple Manifold Duct Illustration...
Страница 38: ...Page 38 Illustration Front View of Dryer...
Страница 40: ...Page 40 Illustration Rear View of Dryer...