11
DOMIcompact F 24 D
fig. 4
Gas
Hot water
Additional expansion
vessel C.H. (if required)
Filling
point C.H.
Automatic
Bypass
fig. 5
3
2
1
4
Cold water inlet
Make Up Water
Provision must be made for replacing water lost from the sealed system. Reference should be made
to BS6798, for methods of filling and making up sealed systems. There must be no direct connection
between the boiler's central heating system and the mains water supply. The use of mains water to
charge and pressurise the system directly, is conditional upon the Local Water Byelaws. Again any such
connection must be disconnected after use. The temporary filling loop (Not supplied) is shown in fig. 5.
Ensure the filling point is on the return pipe to the boiler.
Attention - is drawn to the Local Water Byelaws.
Fittings manufactured from duplex (alpha-beta) brass are not acceptable for underground use and certain
water undertakings will not accept their use above ground.
Ensure all pipework is adequately supported
NOTE: An automatic bypass capable of
passing 6 ltrs per minute must be fitted as
far as possible from the boiler if thermosta-
tic radiator valves are fitted thoughout.
As per the building regulations part ‘L’
Key
1 Filling point C.H 15mm
isolation valve.
2 Temporary flexible connection
3 Cold water supply 15mm
isolation valve
4 Double check valve
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