the Johnson Controls DMPR-RS311 is a critical fire safety component engineered specifically for FD-1300 Series dynamic multi-blade fire dampers

If the orifice is corroded or the opening is enlarged from improper cleaning

making it a staple for any service truck or mechanical install

It also fits various configurations within the VP525

This part is widely used in Weil McLain CGi and CGa series residential gas boilers

MARS 12710 Run Capacitor the Johnson Controls DMPR-RS311 isThe MARS 12710 is a high performance 15 MFD 370V round run capacitor designed for continuous duty in residential and light commercial HVACR systems. As a veteran grade motor run capacitor, this unit provides the necessary phase shift to support PSC (Permanent Split Capacitor) motors, ensuring efficient operation of blower motors and condenser fans. Built to JARD specifications, the 12710 features a non PCB, oil filled design that effectively