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M a i n t e n a n c e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T e c h n i c a l T r a i n i n g
INTERFACE
User interface
FUS
Fuse
ON / OFF
Start/stop button
X2
General sensor connector:
Cp
Heating pressure sensor
V3V
3-way valve
Db
Hot water flow rate detector
X11
Ext
Extracteur
X12
230V option card connector
X14
Pump (P)
X15
Connector for automatic filling kit
X16
Optional tank connector
X17
Control accessories connector
RT
Connection for ON/OFF room
thermostat
E-bus Connection for modulating room
thermostat (Exacontrol)
Text
Connector for a wired outside
sensor
X20
General sensor connector:
NTC2 Heating output temperature sensor
NTC5 Heating return temperature sensor
Pr
Air flow switch (fan flue boiler)
K11
Flue overflow safety device (open
flue boiler)
R1
Coding resistance
X21
Ignition and flame control electrode (AL)
X25
Gas valve :
EVR : electical feeding for the stepper motor
(=modulating valve)
EVS1 : safety valve on the gas inlet
EVS2 : safety valve on the gas stepper motor.
X30
Exalink connector
X31
Not used on these models (UK timer)
X32
Solar connector
X40
Card 24V option connector
X51
User interface connector
X90
Not used on these models (factory use)
X101
Earth connector
N.B:
Wire colours are only given for information purposes.
This facilitates reading of diagrams but they do not
correspond to the colours of wires actually used (wire
colours can change on appliances depending on
procurement sources).