and 851-S series

Double-Throw) internal switch allows for terminal wiring that can either break the circuit on temperature rise (heating) or make the circuit on temperature rise (cooling/ventilation)

error codes for "pressure switch stuck open

Integrated Diagnostics: Simplifies troubleshooting with a centralized wiring point for the thermostat

providing a seamless retrofit for legacy Barber Colman and Robertshaw installations without requiring extensive reconfiguration

Schneider Electric (Barber Colman) M220A01 Actuator R-134A and 851-S seriesThe Schneider Electric M220A01 Actuator, formerly part of the Barber Colman DuraDrive series, is a high performance 24V ball valve actuator specifically engineered for HVACR applications requiring on off 2nd position control. Designed for direct mounting to SpaceLogic VBB and VBS series ball valves, this unit features a normally closed spring return action to ensure positive shut off during power loss. With a 50 second stroke timing for driven