27 m³/h Kv value and 3

this is a horizontal-specific drain pan

A DPDT (Double Pole Double Throw) relay like the S1-024-23972-000 acts like two separate SPDT relays controlled by one coil

the sequencer provides reliable mechanical switching independent of complex electronic boards

90" WC vacuum with a manometer is the first step

Fenwal 35-605606-223 Control Els PW 17895 27 m³/h Kv value andThe Fenwal 35 605606 223 Control is a microprocessor based Direct Spark Ignition (DSI) module engineered for precise timing and safety in gas fired heating systems. Designed for 24VAC 50 60Hz applications, this DSI ignition board monitors burner operation using advanced remote flame sensing technology to ensure stable performance and rapid response to flame failure. This specific model features a 30 second pre purge cycle to clear the combustion