the Maxitrol KR6112 is sized specifically for the RV61 series gas regulators

this is a single inlet blower wheel

Solenoid coils (S4 series) must be purchased separately if your electrical testing indicates a burnout

maintaining designed system static pressure

What does the end switch provide in a zone control setup

Intermatic EP100C Timer 326070-701 the Maxitrol KR6112 is sizedThe Intermatic EP100C is a professional grade 24 hour electronic timer designed to provide precise load control for both indoor and outdoor applications. This single circuit electronic control features to the minute accuracy, making it a reliable upgrade over traditional mechanical time switches for contractors managing lighting, HVACR, or pumping systems. Operating on a versatile voltage range of 120 277 VAC at 60 Hz, the unit includes a selector