Saunier Duval Xeon 50ff Instructions For Use Installation And Servicing page 10

OPEN VENTED FULLY PUMPED WATER SYSTEM
RECOMMENDED RELATIONSHIP BETWEEN
PUMP COLD FEED AND VENT
450mm
MIN.
HEIGHT
FEED AND
EXPANSION
CISTERN
1150mm
MIN.
There must always
be a cold water path
to the return
connection
of the boiler.
BOILER
1m MIN.
27m Max.
28mm
VIEWED
FROM
FRONT
221658B
3 Water Systems
22mm VENT
(MIN.)
15mm (MINIMUM)
COLD FEED
PUMP
FLOW
150mm
MAX.
RET.
IF REQUIRED
15mm (MINIMUM)
BY-PASS WITH
LOCKSHIELD VALVE
Diagram 3.2
22mm VENT
15mm COLD FEED
INDIRECT
CYLINDER
(Shown with
recommended
thermostat and valve).
HEATING
SYSTEM
PUMP
REFER TO BS 5546
Diagram 3.3
RETURN
22mm VENT & 15mm COLD FEED
TO BE FITTED IN ACCORDANCE
WITH BS 5449
IF REQUIRED
1metre Min.
BYPASS 15mm
27 metres
MIN WITH
Max.
LOCKSHIELD
VALVE
FULLY PUMPED CIRCULATION
SYSTEM (DIAGRAMMATIC)
22mm FOR COMBINED FEED & VENT
TO BE FITTED IN ACCORDANCE
WITH BS 5449
IF REQUIRED
1metre Min.
BYPASS 15mm
27 metres
MIN WITH
Max.
LOCKSHIELD
VALVE
FULLY PUMPED CIRCULATION
BYPASS (DIAGRAMMATIC)
10
FLOW
22mm
PIPE
INDIRECT
CYLINDER
ALTERNATIVE
SYSTEM
CONTROL
VALVES
HEATING
SYSTEM
PUMP
INDIRECT
CYLINDER
HEATING
SYSTEM
PUMP
ALTERNATIVE
SYSTEM
CONTROL
VALVES
Diagram 3.4