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