this unit includes a 6-pin Zone Bus access port

The orifice size is strictly calibrated to the furnace's BTU rating and blower capacity

Common Questions and Troubleshooting What causes a furnace limit switch to trip repeatedly

this kit typically functions as a two-stage electric heat system

Armstrong Fluid Technology 182202-647 Pump THPU32HP7Y this unit includes a 6-pinThe Armstrong Fluid Technology 182202 647 Pump (Model E9. 2) is a premier 1 6HP high efficiency circulator pump specifically engineered for hydronic systems requiring reliable performance and high speed operation. This 240Vac single phase pump serves as the direct, updated replacement for the discontinued 180200 647 model, providing enhanced durability through its cast iron construction. Designed for versatility, this maintenance free circulator