Electric Models: If switch remains open, or pops open and closed during cycle, heating system will shut off. Cylinder and fan will continue to operate even though air flow switch is malfunctioning.

Gas Models: If switch remains open, entire unit will shut down when Push-to-start button is released. Once tumbler starts and continues to run, a loss of air flow, air flow switch jams or a bouncing air flow switch will shut entire tumbler down.

￿WARNING

To reduce the risk of fire, air flow 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 air flow switch. Always adjust air flow at installation.

Air flow switch operation is controlled by counterweight position on shaft. Moving counterweight either increases or decreases air flow switch sensitivity.

Counterweight should be adjusted so air flow will force disc away from cabinet when lint panel is opened 6 inches (15.24 cm) with a full load. Adjust air flow switch as follows:

1. Load tumbler.

NOTE: This adjustment is much faster to make with one person opening lint panel in front and another adjusting the counterweight in rear of tumbler.

2.Start tumbler. Open lint panel 6 inches (15.24 cm). Airflow disc should move away from cabinet, opening switch contacts and shutting off 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 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 proper distance, step “2”, it should be adjusted so it is LESS sensitive. Depress spring clip and move counterweight away from disc. Retest by opening lint panel and continue moving counterweight away from disc until switch operates as described in step “2”.

 

MOUNTING

 

SWITCH

 

BRACKET

 

 

 

 

ADJUSTING

 

 

REAR

SCREWS

 

 

 

AIR FLOW

 

PANEL OF

 

SWITCH

 

TUMBLER

 

 

 

 

SCREW

 

SWITCH

AIR FLOW

 

 

SWITCH

 

 

LEVER

 

 

 

 

 

DISC

VANE

SWITCH

 

LEVER

LEVER

 

 

 

 

AIR

 

COUNTERWEIGHT

 

 

SPRING

 

 

CLIP

 

 

 

 

 

DISC

 

 

 

 

COUNTERWEIGHT

 

SPRING

 

 

 

CLIP

 

T041IE3A

 

 

 

Figure 30

54

M412616