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FIGURE NINE: BOILER WIRING DIAGRAM
NO CONNECTION
PUMP SUPPLY CABLE
0.5mm - 1mm
MAINS SUPPLY CABLE
Refer to BS7671 for cable sizing
BOILER CONTROL CABLE
0.5mm - 1mm
SUPPORT BACK
OF PCB WHEN
TIGHTENING SCREWS
ENSURE SCREWS
ARE TIGHT.
LOOSE CABLE
CONNECTIONS
CAN CAUSE BURNING
AT THE CONNECTOR
SUPPLY
CONN 5
CONN 1
FS 1 2A 240V
(5 X 20mm)
REMOVE TOP COVER ONLY TO
GAIN ACCESS TO THE
CONNECTIONS ON THE PRINTED
CIRCUIT BOARD INSIDE THE
BOILER HOUSING
LIVE
EARTH
NEUTRAL
LIVE
EARTH NEUTRAL
RUN
NEUTRAL
N
L
CONTROL
PUMP
CONTROL
PUMP
NC N R E N L
NC N R E N L
CASE EARTH
2
2
2
2