Bosch Worcester 14/19CBI Installation And Servicing Instructions page 12

Fig.11 . System wiring diagram
System
wiring centre
230V 50Hz
(5A Fuse)
E
N
L
Should be located
adjacent to the
boiler
OUTSIDE OF BOILER
INSIDE OF BOILER
Earth post
System components wired into terminal strip
Terminal strip
Common isolator
for wiring centre
and boiler
Cable clamp
in accordance with component manufacturers instructions
Boiler/pump
demand from
L switched
system wiring
centre
Pump L
Pump N
Permanent N
Permanent L
Switched L
(Boiler Demand)
12
Pump not to be
connected to
system wiring
centre
Pump
(supplied from
boiler only)
Control Board
X1