Speed Queen Drying Tumblers none - Manual (Page 49)

Adjustments
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Airflow Switch
Gas and Electric Tumblers
The airflow switch (located on the rear of tumbler,
Figure 19
) is set at the factory for proper operation.
However, if there is a problem with the switch, it
should be adjusted as follows:
NOTE: Steam models do not have an airflow switch.
NOTE: Control panel must be in place and access
door closed before attempting to adjust airflow switch.
IMPORTANT: Airflow switch disc must remain
closed during operation. If it opens and closes
during the drying cycle, this indicates insufficient
airflow through the tumbler. If switch remains
open, or pops open and closed during the cycle, the
heating system will shut off. The cylinder and fan
will continue to operate even though the airflow
switch is opened.
The airflow switch operation is controlled by the
counterweight position in the shaft. Moving the
counterweight either increases or decreases airflow
switch sensitivity. The counterweight should be
adjusted so the disc moves away from the cabinet
when the lint panel is opened 1.5 inches (38.1 mm) with
a full load. Adjust the airflow switch as follows:
1. Load the tumbler. This adjustment is much faster
to make with one person opening lint panel in
front and another adjusting the counterweight in
the rear of tumbler.
2. Start the tumbler. Open the lint panel 1.5 inches
(38.1 mm). The airflow disc should move away
from the cabinet, opening the switch contacts and
shutting off the heat system. This indicates
proper operation and proper adjustment.
3. If switch is not opening as described in step 2, it
should be adjusted so it is MORE sensitive.
Depress the spring clip and move counterweight
toward disc. Retest by opening lint panel and
continue moving counterweight toward disc until
switch operates as described in step 2.
4. If switch opens BEFORE lint panel is opened the
proper distance, step 2, it should be adjusted so it
is LESS sensitive. Depress the spring clip and
move counterweight away from the disc. Retest
by opening lint panel and continue moving
counterweight away from disc until switch
operates as described in step 2.
WARNING
To reduce the risk of fire, airflow switch
operation may be affected by a clogged
lint screen, lack of make-up air,
obstructions in the vertical recirculation
stack or in the customer installed main or
collector ducts. These conditions must be
checked and necessary corrections
made before adjusting airflow switch.
Always adjust airflow at installation.
W073