This specific model (325-5L-1) typically requires a 12A39 vent limiter for indoor use without a vent line to the atmosphere

With a 3/4 inch NPT pipe size and a high flow coefficient of 6

Compare the readings against the Maxitrol resistance chart relative to the ambient temperature

the 67225F is compatible with the full range of 25-Series pilots

While this is a single-timing sequencer

Belimo TFRB24-SR Actuator R-410A This specific model (325-5L-1) typicallyThe Belimo TFRB24 SR is a compact spring return actuator designed for the fail safe operation of dampers and valves in HVAC systems. Providing 22 in lb torque, this proportional control actuator operates on a 24VAC DC power supply and accepts a 2 10 VDC control signal for precise modulation. Built for high reliability applications, it features brushless DC motor technology, ensuring consistent torque delivery and energy efficiency while eliminating