
When connecting any electrical part be sure to unplug the boiler at the main switch
and disconnect the power supply.
S
1
S
2
S
3
S
4
S
5
S
6
S
13
S
7
S
8
S
9
S
10
S
11
S
12
S
14
S1 - DHW sensor / hydraulic crossover sensor * -
Temperature sensor NTC 5K - PVC l=2000 (26226)
S2 - Acc. (buffer) temperature sensor upper -
Temperature sensor NTC 5K - PVC l=1000 (12041)
S3 - Acc. (buffer) temperature sensor lower -
Temperature sensor NTC 5K - PVC l=1000 (12041)
S4 - Flue gas temperature sensor - Temperature sensor
PT 1000 - Teflon l=1700 (62330)
S5 - Outdoor temperature sensor - Outdoor temperature
sensor NTC 5K (31428)
S6 - Main flow temperature sensor / hydraulic crossover
sensor *- SET temperature sensor NTC 5K -
PVC l=2000 (32685)
S7 - Return flow temperature sensor - SET temperature
sensor NTC 5K - PVC l=2000 (32685)
S8 - Not used
S9 - Room thermostat (voltage-freecontact)
S10 - Alarm output 1 (Additional equipment)
S11 - Alarm output 2 (Additional equipment)
S12 - Fuel level sensor (pellet) - CMSR 100 (26199)
S13 - Not used
S14 - Room corrector - CSK (32680)
7.0. ELECTRIC CONNECTION
All electrical works must be performed by a certified professional in accordance with valid national
and European standards.
A device for switching of all power supply poles must be installed in electrical installation in
accordance with the national regulations on electrical installations.
Electric connection
Terminal Block & Strip Connector
Automatic cleaning
of boiler flue
passagees
N L
N L
N L
P1
P2
P3
N L
L N
N L
L1
N
MD
Mix valve
actuator
Fan
RPM
counter
Red
Black White
Power
supply
230 V
N L PE
Pump P1
(Boiler
pump)
Pump
P2
Pump
P3
Motor
Screw
refill
*If the configuration contains a hydraulic crossover, a DHW sensor or main flow sensor is used for
the hydraulic crossover sensor, depending on the other elements of the configuration.
When configuration contains hydraulic crossover and DHW, then hydraulic crossover temp. sensor
must be connected to connector S6, in other cases hydraulic crossover temp. sensor must be
connected to the connector S1.
Technical instructions
BioTec Plus
46