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7.2 : ILLUSTRATED WIRING DIAGRAM
FAN
AIR PRESSURE
SWITCH
GAS
VALVE
PUMP
PCB
OVERHEAT
THERMOSTAT
MAINS
TERMINAL
BLOCK
CLOCK
LINK
PRIMARY FLOW
SWITCH
CENTRAL
HEATING
THERMISTOR
DOMESTIC
HOT WATER
THERMISTOR
DOMESTIC HOT
WATER FLOW
SWITCH
•
•
•
FUSE F2
1Amp GQB
(Glass)
•
•
FUSE F1
2Amp HRC
(Ceramic)
NOISE
FILTER
•
25