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Service Reference Manual UNIT COMPONENTS
5-19
SRM-HW/HWC 2/99
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.
N.O. (Normally Open)
Terminal
N.C. (Normally Closed)
Terminal
Common Terminal
7"
FIGURE 5-15 Camstat Main Limit Switch
Camstat Model L59-7B-220-30
Armstrong P/N: 01150A008
Setting: 220°F
FIGURE 5-16 Main Limit Switch
3.05 (+/ .05 )""
Manufacturer P/N: INT17L-2107
Armstrong P/N: 40154B007
Open Setting: 190°F
Closed Setting: 160°F