installation Before the
installation Before the boiler is used for the first time, the trap must be filled with water. To do this, add approximately 1/4 litre of water via the flue outlet before fitting the flue system, or unscrew the cap on the trap positioned underneath the boiler, fill it with water and refit it Warning! Insufficient water in the trap can temporarily cause the flue gas to be expelled into the surrounding ambient air. Water circuit diagram A B 1 2 3 4 8 7 6 5 C 1. C.H. flow temperature probe . C.H. return temperature probe 3. Burner 4. Detection electrode 5. Condensate trap 6. Modulating fan 7. Ignition electrodes 8. Thermal fuse 20
Connecting the Flue Flue System The provision for satisfactory flue termination must be made as described in BS 5440-1. The appliance must be installed so that the flue terminal is exposed to outdoor air. The terminal must not discharge into another room or space such as an outhouse or lean-to. It is important that the position of the terminal allows a free passage of air across it at all times. The terminal should be located with due regard for the damage or discolouration that might occur on buildings in the vicinity, it must also be located in a place not likely to cause nuisance. In cold or humid weather water vapour may condense on leaving the flue terminal. The effect of such “steaming” must be considered. If the terminal is less than 2 metres above a balcony, above ground or above a flat roof to which people have access, then a suitable stainless steel terminal guard must be fitted. The minimum acceptable spacing from the terminal to obstructions and ventilation openings are specified in Fig. 1. 4See table on page 27 & 28 installation Fig. 1 - A Directly above or below an opening, window, etc 300 mm - B Horizontally to an opening, window, etc 300 mm - C Below gutters, soils pipes or drain pipes 75 mm - D Below eaves 00 mm - E From vertical drain pipe or soil pipe 75 mm - F From internal or external corner 300 mm - G Above ground, roof or balcony level 300 mm - H From a surface facing the terminal 500 mm - I From a terminal facing a terminal 500 mm - J Vertically from a terminal on the same wall 1500 mm - K Horizontally from an terminal on the same wall 300 mm - L Fixed by vertical flue terminal See table 122 118 mm 118 mm Fig. 2 21
X