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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.
5.7.4 The SCB-02 expansion PCB
Fig.62 SCB-02 PCB
AD-3001313-01
C No
Nc
Status A
C No
Nc
Status B
N L +
-
0-10
Tout
N L N+
-
0-10
Tdhw Tflow R-Bus
The SCB-02 has the following features:
Control of a (mixing) zone for heating (or cooling)
Control of one domestic hot water (DHW) zone
0–10 V output connection for a PWM system pump
Two potential-free contacts for status notifications
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.
Connecting a domestic hot water (DHW) pump
Connecting a domestic hot water (DHW) pump. The maximum power
consumption is 300 VA.
Connect the pump as follows:
Earth
NNeutral
LPhase
Connecting a mixing valve
The mixing valve connector can be used to connect a mixing valve (230
VAC) for use in a boiler group (zone).
Fig.63 DHW pump connector
AD-4000123-01
N L
5 Installation
7734324 - v.06 - 01102021 39
39


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