Armstrong World Industries 242, 243, 302, 122 Main High Limit Switch *52, Camstat Main Limit Switch

Service Reference Manual UNIT COMPONENTS

5-19

Main (High) Limit Switch (*52)

A Normally Closed control that opens if abnormally high circulating air temperatures occur. It is an automatic reset control.

Note: Several different main limit switches are used. Refer to the parts list for the correct limit switch.

" 7

Common Terminal

Camstat Model L59-7B-220-30

Armstrong P/N: 01150A008

Setting: 220°F

N.C. (Normally Closed)

Terminal

N.O. (Normally Open)

Terminal

FIGURE 5-15 Camstat Main Limit Switch

3.05" (+/–.05")

Manufacturer P/N: INT17L-2107

Armstrong P/N: 40154B007

Open Setting: 190°F

Closed Setting: 160°F

FIGURE 5-16 Main Limit Switch

SRM-HW/HWC 2/99