13
Automatic
air vent
Fig. 13. Typical fully pumped sealed system (Honeywell ‘Y’ plan).
Expansion
Vessel
Diverting
valve
Boiler
Pump
Radiator
N.B.
A drain cock should be
installed at the lowest point of
the heating circuit
Domestic hot
water
cylinder
Pressure
gauge
Safety valve
To system filling device (see fig.14)
Fig. 14. System filling and make-up
Heating
return
Non return
valve
Non return
valve
Test cock
Temporary
hose
Hose union
Worcester combi-fill system
Stop cock
Heating
return
Non return
valve
Stop
cock
Auto air
vent
Fill point.
Heating return
30mm (12in) min.
above highest
point of the system
Make up
vessel
METHOD 1
METHOD 2