Important
If the boiler is fitted with the SCB-02 board, then this is
automatically recognised by the automatic control unit of the
boiler.
On removing this board, the boiler will show an error code. To
prevent this error, carry out an auto-detect immediately after
removing this board.
4.3.2
Description of the CB-09 PCB
The CB-09 PCB allows additional inputs to be connected as per the
following table:
Mar
ker
Con
nector
Description
1
R-Bus
Not used
2
BL
Boiler frost protection (active if contact open)
3
RL
Release open contact
4
Tout
Not used
5
PWM
Modulating pump control connection
6
X4
Modulating pump power connection
4.3.3
Description of the IF-01 PCB
The IF-01 PCB is factory fitted and allows additional inputs such as a
sensor or switch to be connected to the system.
This PCB controls the boiler with the 0-10V signal from an external control
system.
Connector
Description
0-10 (input)
The 0-10V signal corresponds to a temperature or power
set point, depending on the position of the jumpers
0-10 (output) Output signal indicating the boiler's operating mode
Status
Boiler fault reporting contact output
OTm
Communication link with the CU-GH-08 PCB
Fig.5
Tout
-
+
BL
RL
L
N
R-Bus
PWM
1
6
MW-2000826-01
2
3
4
5
Fig.6
AD-0000054-01
St
a
tu
s
0
-1
0
0
-1
0
N
c
N
o
C
N
c
N
o
O
T
m
0
+
0
+
C
O
T
m
0
+
0
+
X5
X4
X1
IF-01
%
1
2
4 Description of the product
7717201 - v03 - 25062019
MID _HMI T-control - Gas 120 ACE
15
