Markel 56811001 Override Switch 321702-401 the ball bearing system and

the ball bearing system and all-angle thrust design allow the motor to be installed in shaft-up

this element kit typically includes the necessary replacement gasket to ensure a watertight seal during the screw-in installation process

Its ±2-1-2% ASME Grade A accuracy and clear aluminum dial provide the precision required for leak detection and vacuum systems

automatically retracting the actuator shaft upon a loss of supply air pressure to maintain a known fail-safe damper position

Markel 56811001 Override Switch 321702-401 the ball bearing system andThe Markel 56811001 Override Switch is a critical field installed component engineered specifically for Markel 5100 Series unit heaters. Designed to provide precise manual oversight, this fan override switch allows contractors to bypass standard automated cycles for summer air circulation or to purge the heater casing of residual heat post shutdown. This replacement HVAC switch is built for the rigors of industrial environments, ensuring the fan motor