It is intended to be mounted onto existing Alco XC series valve bodies using the provided capscrews

For proper characterization

Legacy Replacement: Designed as the official replacement for the CTK04AE

or if the unit gets "stuck" in defrost mode (fan remains off while the compressor runs)

this assembly performs both the ignition spark and the flame rectification (sensing) functions

Siemens Building Technology S55180-A150 Actuator 326058-755 It is intended to beThe Siemens Building Technology S55180 A150 Actuator is a specialized 24V linear actuator engineered for the Powermite MZ Series valves. As an official SSB131. 09U model, it serves as the direct SSB81U cross reference, providing a seamless field replacement for legacy building automation components. This 3 position floating control actuator delivers 45 lbs (200 N) of nominal force, specifically calibrated for valves with a 7 32 inch (5. 5 mm) stroke.