Uno - Installation Manual

Jointing should be

Jointing should be either with capillary soldered or compression fittings. Where possible pipes should have a gradient to ensure air is carried naturally to air release points and water flows naturally to drain taps. The appliance has a built-in automatic air release valve, however it should be ensured as far as possible that the appliance heat exchanger is not a natural collecting point for air. Except where providing useful heat, pipes should be insulated to prevent heat loss and avoid freezing. Particular attention should be paid to pipes passing through ventilated spaces in roofs and under floors. BY-PASS: The appliance includes an automatic by-pass valve, which protects the main heat exchanger in case of reduced or interrupted water circulation through the heating system, due to the closing of thermostatic valves or wheel head valves within the system. SYSTEM DESIGN: This boiler is suitable only for sealed systems. Drain Cocks: These must be located in accessible positions to permit the draining of the whole system. The taps must be at least 15mm nominal size and manufactured in accordance with BS 2870:1980. SAFETY VALVE DISCHARGE: The discharge should terminate facing downward on the exterior of the building in a position where discharging (possibly boiling water & steam) will not create danger or nuisance, but in an easily visible position, and not cause damage to electrical components and wiring. The discharge must not be over an entrance or a window or any other type of public access. AIR RELEASE POINTS: These must be fitted at all high points where air naturally collects and must be sited to facilitate complete filling of the system. The appliance has an integral sealed expansion vessel to accommodate the increase of water value when the system is heated. It can accept up to 7 l (1.5 gal) of expansion water. If the heating circuit has an unusually high water content, calculate the total expansion and add an additional sealed expansion vessel with adequate capacity. MAINS WATER FEED - CENTRAL HEATING: There must be no direct connection to the mains water supply even through a non-return valve, without the approval of the Local Water Authority. FILLING: A temporary method for initially filling the system and replacing lost water during servicing in accordance with Water Supply Byelaw 14 must be provided. DOMESTIC WATER The domestic water must be in accordance with the relevant recommendation of BS 5546:1990. Copper tubing to BS EN 1057:1996 is recommended for water carrying pipe work and must be used for pipe work carrying drinking water. RESIDUAL HEAD OF THE BOILER mbar 600 500 400 300 200 100 0 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 l/h 8 8

2.9 FLUE CONNECTIONS 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. 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 terminal guard must be fitted. When ordering a terminal guard, quote the appliance model number. A suitable terminal guard is available from: TOWER FLUE COMPONENTS Morley Road Tonbridge Kent TN9 1RA The minimum acceptable spacing from the terminal to obstructions and ventilation openings are specified in FIG.2.5. TERMINAL POSTION mm F D J HI BC A E L G K G F A - Directly below an open window or other opening 300 B - Below gutters, solid pipes or drain pipes 75 C - Below eaves 200 D - Below balconies or car-port roof 200 E - From vertical drain pipes and soil pipes 75 F - From internal or external corners 300 G - Above ground or below balcony level 300 H - From a surface facing a terminal 600 I - From a terminal facing a terminal 1200 J - From an opening in the car port (e.g. door, window) into dwelling 1200 K - Vertically from a terminal in the same wall 1500 L - Horizontally from a terminal in the same wall 300 FIG. 2.5 The boiler is designed to be connected to a coaxial flue discharge system. Ø 60/100 mm 135.9 FIG. 2.6 9