12
BY-PASS LOOP
Fig.11
PIPE FITTINGS
Materials used for installation work should be
resistant, sound and should conform to the current
editions of the following or their equivalent.
1.1 Ferrous Materials
BS 4127 Stainless steel tubes.
BS 1387 Steel tubes.
BS 1740 Steel pipe fittings.
A 15mm system by-pass must be fitted
not less than 1.5 meters (4.9ft) from the
cooker to allow correct water circulation
for the pump and to prevent condensation
forming in the boiler. This should be
balanced. A heat sink radiator must be
installed in addition to the By-Pass Loop
(See Fig.11 & 11A)
BS 6956 Jointing Materials
1.2 Non-Ferrous Materials.
EN 29453 Soft Solder Alloys .
BS 864 Compression tube fittings.
BS 2871 & BS E.N. 1057 Copper and Copper
Alloys.
AIRING CUPBOARD LAYOUT
Fig.11a
Not less than 1.5
meters (4.9 ft.)
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