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Operating with a 4-inch inlet
the Honeywell 393044 Wiring Harness is the critical OEM replacement component required for the proper integration of thermal-zone systems and combustion controls
) remain consistent for wire-for-wire replacement
5" WC for stable flame characteristics and maximum heat exchanger efficiency
Viessmann 7870769 Control Console 318518-761 Operating with a 4-inch inletThe Viessmann 7870769 Control Console is a critical OEM replacement component engineered specifically for Vitodens 100 W B1HA and B1KA v5 gas fired condensing boilers. As a direct technical cross reference for the retired 7866187 module, this console provides the essential interface for advanced system monitoring, parameter configuration, and diagnostic feedback. It is designed to integrate seamlessly with Viessmann B1HA278 and B1KA 125 burner control
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