PIPING SYSTEM INSTALLATION

Heating system connections - Pipe diam 22 mm Hot water system connections - Pipe diam 15 mm The supply from the governed gas meter must beof adequate size to provide a constant inlet working pressure of 20 mbar (8 in w.g.). To avoid low gas pressure problems, it is recommended that the gas supply is connected using 22 mm pipe. Gas connection - Pipe diam 22 mm Tundish connection - Pipe diam 22 mm Safety valve discharge - Pipe diam 22 mm Water connection diagram 5 . Connectthe system pipework to the boiler observing the correct flow and return format shown in diagram5 Connect the copper tails and isolating cocks supplied, to the boiler : see . On completion, the gas installation must betested using the pressure drop method and purged in accordance with the current issue of BS6891. Safety valve discharge Gas Safety (Installation and use) Regulations WARNING. It must not discharge above an entrance or window or any type of public access area. Connect the safety valve discharge pipe to the boiler, the discharge must be extended using not less than 15 m o.d. pipe, to discharge in a visible position outside the building, facing downward preferably over a drain. The pipe must have a continuous fall and be routed to a position so that any discharge of water, possibly boiling or steam, cannot create any danger to persons, damage to property or external electrical components and wiring. Tighten all pipe connection joints. In your interests and that of gas safety, it is the law that ALL gas appliances are installed and serviced by a competent person in accordance with the above regulations.

F : Gas A : Heating return Flow restrictor, filterand non return valve D : Domestic hot water flowB : Coldwater inlet C : Heatingflow

Diagram 5 Pla 194UK 8