As a critical Trane HVAC interface module

you must confirm the mounting bolt pattern

to prevent over-firing and excessive heat loss up the chimney

ideal for complex unit heater wiring

Why is external equalization necessary for this 15-ton valve

Belimo CQKB24-SR-RR Actuator R-448A As a critical Trane HVACThe Belimo CQKB24 SR RR is a direct coupled electronic fail safe actuator engineered for high performance modulation in HVAC zone control. Operating on a 24VAC DC power supply, this actuator utilizes a 2 to 10 VDC or 4 to 20 mA proportional control signal to provide precise positioning for CQ series pressure dependent zone valves. The internal supercapacitor technology ensures the valve returns to its fail safe position (Normally Closed) during power