Common Questions Is the 902987 compatible with my existing 2-wire thermostat

It's a direct replacement for common Honeywell M84

This kit is designed for 208/230V single-phase (1Ø) 60Hz power supplies

Always verify your unit's data label before installation

5HP pump relay kit engineered for precise load management in commercial and residential hydronic systems

Siemens Building Technology 331-916 Mounting Bracket 319825-402 Common Questions Is the 902987For field technicians and mechanical contractors tasked with retrofitting or mounting pneumatic controls, the Siemens 331 916 (AP331) is the standard issue side mounting bracket designed specifically for No. 3 and No. 4 pneumatic damper actuators. Built for rigid, stable installations, this fixed mounting bracket ensures proper alignment of the actuator to the damper shaft, preventing side loading that can prematurely wear out actuator seals or cause