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2.9Water Connections
A/23 MFFI - A/27 MFFI
A
B
C
D
E
I
Fig. 2.4
Legend
A = Central Heating Flow
B = Domestic Hot Water Outlet
C = Gas Inlet
D = Domestic Cold Water Inlet
E = Central Heating Return
I = Safety Valve
Central Heating
Detailed recommendations are given in BS 6798:1987 and BS
Pipe Work:
Copper tubing to BS EN 1057:1996 is recommended for water pipes. 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
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
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 downwards 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
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