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Fig.69
Tout connector
Tout
Fig.70
R-Bus connector
R-Bus
Fig.71
0–10 V output connector
0-10
-
+
5.7.5
Connecting the power cable
Tab.43
Power connection
Wire cross section
solid wire: 2.5 mm² (AWG 14)
stranded wire: 2.5 mm² (AWG 14)
stranded wire with ferrule: 2.5 mm² (AWG 14)
7734324 - v.07 - 21092022
Connecting an outdoor temperature sensor
An outdoor temperature sensor can be connected to the Tout connector.
Always connect the sensor to the PCB that controls the zones. For
example: when the zones are controlled by an SCB-02 or SCB-10,
connect the sensor to that PCB.
1. Connect the two-wire cable to the Tout connector.
Set parameter AP056 to the installed outdoor temperature sensor type.
When an on/off thermostat is also connected, the boiler will control the
temperature with the set point from the internal heating curve. OpenTherm
controllers can also use the outdoor temperature sensor. In that case, the
desired heating curve must be set on the controller.
AD-4000006-03
Connecting thermostats
The R-Bus connector can be used to connect a room thermostat. The
connector supports the following types:
R-Bus thermostat (for example, the eTwist)
OpenTherm thermostat (for example, the iSense)
OpenTherm Smart Power thermostat
On/off thermostat
It does not matter which wire is connected to which cable clamp. The
software recognizes which type of thermostat is connected.
AD-3001314-02
Connecting 0–10 V output
The 0-10 contact can be used to connect a PWM system pump. The
speed of the pump is modulated based on the signal received from the
boiler. Depending on the make and type of pump, the pump can be
controlled by a 0–10 V or a PWM signal.
Connect the system pump controller to connector 0-10.
Select the type of signal that will be sent from the boiler using the
parameter EP029.
Select the type of signal that controls the pump using the parameter
EP028.
AD-3001305-01
Caution
If possible, use the pump modulation signal. This provides the
most accurate pump control.
If the automatic burner unit does not support pump modulation,
the pump will behave as an on/off pump.
The power connection is located in the rear part of the control box. The
power connection is fitted with a 10AT fuse.
Danger of electric shock
Always turn off the main power before working on the electrical
connections.
Make sure the following requirements are met when connecting the power
cable:
Stripping length
Tightening torque
7 mm
0.5 N⋅m
5 Installation
41
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