Airflow Switch

Gas and Electric Tumblers

WARNING

To reduce the risk of fire due to inadequate airflow, the airflow switch must be adjusted to operate per the instructions in this manual.

W674

The airflow switch (located on the rear of tumbler, Figure 26) is set at the factory for proper operation. However, if there is a problem with the switch, it should be adjusted as follows:

●Confirm exhaust duct and make-up air vents are properly sized and not obstructed. Refer to Make-Up Air and Venting sections.

●Confirm lint screen is clean and access panels are in place.

●Check operation of airflow switch and adjust as follows:

NOTE: Steam models do not have an airflow switch.

Adjustments

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.Temporarily tape down the lint panel safety switch located behind the upper right corner of the lint panel.

3.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.

4.If switch is not opening as described in step 3, 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 3.

5.If switch opens BEFORE lint panel is opened the proper distance, step 3, 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 3.

IMPORTANT: Remove tape from lint panel switch.

M414905

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