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the ICP 1003687 is the direct replacement for most Heil Quaker
Installers should note that this Viessmann replacement control unit requires specific parameter programming based on the boiler's serial number and gas type—natural gas or LPG—via the internal "SERV" menu
it is functionally identical to the 172809 model
Built on a 56Y frame
Trane WIR2957 Wire 321894-709 the ICP 1003687 is theTransitioning to integrated control systems requires precise connectivity, and the Trane WIR2957 (also identified as WIR02957) is the specified 5 pin wire harness for interfacing with ICM motor assemblies. This genuine OEM component is engineered to facilitate reliable communication between the system control board and the condenser fan motor, ensuring the high voltage signals required for varying motor speeds are delivered without impedance. Designed
