Models 281L and 281R Limitrols Instruction Manual
Instruction manual for Barber-Colman Models 281L and 281R Limitrols, pneumatic limit switches designed for HVAC and building automation systems. This service manual documents installation, operation, and maintenance of these industrial control instruments, which saw widespread use in commercial and industrial climate control applications. A technical notice details the replacement of the original adjusting knob with an FM-approved screwdriver adjustment method, secured by an acorn nut. Published December 1966, this workshop reference equips technicians with field procedures for installation, calibration, and troubleshooting of legacy Barber-Colman equipment—essential for building maintenance crews and HVAC service professionals.
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Document Details
- Format
- Pages
- 28
- Size
- 12.7 MB
- Category
- Machine Tools