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.
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.
5.8.4
The SCB-10 expansion PCB
The SCB-10 has the following features:
Control of 2 (mixing) zones
Control of a third (mixing) zone via an optional PCB
Control of one domestic hot water (DHW) zone
Cascade layout
Expansion PCBs are automatically recognised by the control unit of the
boiler. If expansion PCBs are removed, the boiler will show an error code.
To resolve this error, an auto-detect must be carried out after removal.
AD-3001210-01
X2
X3
+TA-
TA
Tsyst
Tsyst
Tdhw
Tflow
Tflow Tflow
C
A
B
2
1
R-Bus
Tout
R-Bus
R-Bus
1
2
3
4
+
-
Status
C
A
B
0-10V
N L
B
N
N L
TS
N L
TS
A
N
23
22
18
20
19
21
5
14
13
12
11
15 16 17
4
3
2
1
10
9
8
7
6
1 Outdoor temperature sensor
2 Programmable and 0-10 V input
3 Room temperature sensor - circuit C
4 Room temperature sensor - circuit B
5 Room temperature sensor - circuit A
6 Domestic hot water tank pump
7 Mixing valve - circuit B
8 Pump and safety thermostat - circuit B
9 Mixing valve - circuit A
10 Pump and safety thermostat - circuit A
11 System sensor 1
12 System sensor 2
Fig.48
0–10 V output connector
AD-3001305-01
+
-
0-10
Fig.49
SCB-10 PCB
5 Installation
50
C 340 / C 640
7762666 - v.02 - 29092020
