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Connecting the system pump
1. Connect a system pump to the Pump terminals of the connector.
Important
The maximum power consumption is 300 VA.
The function of the system pump can be changed using parameters
PP015, PP016 and PP018.
Connecting a PWM system pump
A PWM system pump can be connected to the boiler and can be
controlled in a modulating way from the boiler
1. Connect the PWM pump to the PWM terminals of the connector.
Important
Contact us for more information.
Analogue input
This input has two modes: control based on temperature or based on heat
output. If this input is used, the OT communication from the boiler is
ignored.
1. Connect the input signal to terminals 0–10 of the connector.
Change the mode of the analogue input using the parameter EP014.
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-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.
Room thermostat connector (On/off - OT)
The On/off - OT connector can be used to connect a room thermostat. The
connector supports the following types:
OpenTherm thermostat
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.
Blocking input
Caution
Only suitable for potential-free contacts (dry contact).
Important
First remove the bridge if this input is used.
Fig.39
System pump
AD-3001306-01
N
L
Fig.40
PWM system pump
AD-3001307-01
+
-
PWM
Fig.41
Analogue input
AD-3001304-01
+
-
0-10
Fig.42
Tout connector
AD-4000006-02
Tout
Fig.43
On/off - OT connector
AD-3001599-02
OT
On/off
5 Installation
48
C 340 / C 640
7762666 - v.02 - 29092020