2.6 Components A CH pump L. Air supply cap (not te be removed) B Gas valve M. Flue pipe adapter (only to be used in combination with the accompanying elbow in flue sets). C Boiler controller N. Connection block / terminal strip X4 D Sensor S1 O. Condensate drain pan E Sensor S2 P. Hot water sensor S3 F Fan Q. Condensate trap G Flow sensor R. Heat exchanger H CH pressure sensor S. Operating panel and read-out I Mains lead 230 V AC without plug (stripped) T. Ionisation / Ignition electrode J Manual air bleed U. Position of data plate K Sight glass Intergas Heating Ltd 10