9
220683B
3.8 Inhibitor
Attention is drawn to the current issue of BS5449 and
BS7593 on the use of inhibitors in central heating
systems.
If an inhibitor is to be used, contact a manufacturer or
Hepworth Heating Ltd., for their recommendations as to
the best product to use.
When installing in an existing system take special care
to drain the entire system, including radiators, then
thoroughly cleaning out before installing the boiler
whether or not adding an inhibitor.
3 W a t e r S y s t e m s
Diagram 3.3
FLOW
RETURN
1metre Min.
27 metres
Max.
22mm VENT &
15mm COLD FEED
TO BE FITTED IN
ACCORDANCE
WITH BS 5449
INDIRECT
CYLINDER
ALTERNATIVE
SYSTEM
CONTROL
VALVES
HEATING
SYSTEM
PUMP
FULLY PUMPED CIRCULATION
BYPASS (DIAGRAMMATIC)
0091(b)M
BYPASS 22mm
MIN WITH
LOCKSHIELD
VALVE
4114
22 x 28
UNION
CONNECTION
28mm
PIPE
