Bosch Worcester 14/19CBI Installation And Servicing Instructions page 9

Fig. 6. System layout if using Honeywell 'S' plan
Feed and
Vent Cistern
Heating vent
(22mm min.)
Boiler
Fig. 7. Fully pumped sealed system.
Note:
A drain cock
should be fitted
RV
at the lowest
point of the
heating circuit
and beneath
the appliance
RV
Radiator Valve - Flow RV
Lockshield Valve - Return LV
Fig. 8. Sealed system filling and make-up.
Heating return
Non return
valve
Primary
S.H.
cold feed
(15mm min.)
150mm max
LV
RV
LV
RV
Non return
valve
Hose union
Stop cock
Test cock
Temporary hose
Domestic hot
water cylinder
Diverting
valves
Pump
Bypass or
uncontrolled
radiator
LV
LV
Pressure
Gauge
Expansion
Vessel
Relief
Valve
Stop Valve Fixed Cylinder Type or sealed systems - Approved connection
Heating return
9
For system wiring please refer to
Fig. 10. and the controls
manufacturers details.
S.H. – Minimum static head 1.2m
measured from the highest point in the
heating system (top surface of the appliance
S.H.
or highest point in the heating system) to the
water level in the feed and expansion tank
N.B. A drain cock should be
installed at the lowest point of
the heating circuit
Radiator
INDIRECT
CYLINDER
APPLIANCE
Bypass
balancing valve or
bathroom
radiatior with two
lockshield valves
Mains Cold Water
BS
Make up
vessel
Auto
air vent
Non return
valve
Stop
1200mm (48 in)
cock
above the highest
point of the system.
Fill point
For system
wiring
please refer to
Fig. 10. and the
controls
manufacturers
details.