Bosch WORCESTER DANESMOOR UTILITY 12/14 Installation And Servicing Instructions page 15

Fig. 13. Typical fully pumped sealed system (Honeywell 'Y' plan).
Boiler
Fig. 14. System filling and make-up
METHOD 1
Automatic
air vent
Domestic hot
water
cylinder
Pressure
Safety valve
gauge
Expansion
Vessel
To system filling device (see Fig.14)
Automatic bypass valve to be fitted
where thermostatic radiator valves
are fitted on all radiators
Temporary
hose
Diverting
valve
Pump
Auto air
vent
Heating
return
15
N.B. A drain cock should be
installed at the lowest point of
the heating circuit
Radiator
Make up
vessel
Non return
valve
30mm (12in) min.
above highest
point of the system
Stop
cock
Fill point.
Heating return
METHOD 2