BOILER CONNECTIONS

Gas Safety (Installation and Use) Regulations From left to right the fixing jig comprises : D- 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. Domestic hot water outlet. A- Heating return with isolating valve ( m ). E- Electrical connection box. B- Cold water inlet with isolating valve ( p ). F- Gas supply. C- Heating flow with isolating valve ( q ), drainscrew ( r ) and safety valve ( s ). Gas connection
Diagram 5 •The supply from the governed gas meter must be of adequate size to provide a constant inlet working pressure of 20 mbar (8 in w.g.). To avoid low gas pressure problems, it is recom- mended that the gas supply is connected using 22 mm pipe. •On completion, the gas installation must be tested using the pressure drop method and purged in accordance with the current issue of BS6891.
Filters and washers:1 -Fibre washer 2 -Metal filter 5555 3 -Plastic filter

23113

4, 5 and 6 -Black graphite

34

57,557,5

25 33

m 123456 p r A q B s C D FE

Pla 041

PIPING SYSTEM INSTALLATION

•Heating system connections - Pipe diam 22 mm•Hot water system connections - Pipe diam 15 mm•Gas connection - Pipe diam 22 mm •Safety valve discharge - Pipe diam 15 mm Water connection diagram 5 . Connect thesystem pipework to the boiler observing the cor- rect flow and return format as shown in diagram 5.Safety valve discharge Connect the copper tails and isolating cocks sup- plied, to the boiler, see WARNING. It must not discharge above an en- trance 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 con- tinuous fall and be routed to a position so that any discharge of water, possibly boiling or steam, can- not create any danger to persons, damage to property or external electrical components and wiring. Tighten all pipe connection joints. Connect the safety valve discharge pipe to theboiler, 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 con- tinuous fall and be routed to a position so that any discharge of water, possibly boiling or steam, can- not create any danger to persons, damage to property or external electrical components and wiring. Tighten all pipe connection joints. 7