Baxi 430 Combi 2 - Maintenance; General maintenance; Maintenance instructions

3 Technical specifications
18 Combi 2
Electrical diagram
Fig.5 Boiler electrical wiring diagram
Tab.15 Electrical connections
X1
Power supply: L: Live
230V – 50 Hz N:
Neutral
: Earthing connector
X9
CAN connection
X2
Fan supply (FAN)
X10
Service interface
X3
Gas valve (GV)
X17
Open Therm room unit (OT)
X4
Pump power supply
X17
Outside sensor (T/OUT)
X5
3-way valve motor power supply
X17
External tank sensor - accessory (T/DHW)
X6
Earth connections
X15
Boiler stoppage (with open contact)
X7
Sensors:
Limit thermostat (ST) Installation
return temperature (SRT) Installation
flow temperature (SFL) Flue gas
temperature (FS)
RT
Room thermostat contact (230 V)
X8
Sensors:
DHW flowmeter (HS) Heating circuit
pressure switch (SP) Pump PWM
signal (PWM PUMP)
Tab.16 Cable colour key
BK
Black
GY
Grey
BN
Brown
RD
Red
BU
Blue (and light blue)
WH
White
GNYE
Green/Yellow
YE
Yellow
3.4