Description of the SCB-10 PCB
Fig.39
MW
-1001
101-2
5
17
16
15
14
13
12 11 10
9
8
7
6
18
4
3
2
1
22
19
21
23
20
X2
X3
1 R-Bus: Baxi uSense connected room thermostat,
on/off thermostat, modulating thermostat or
OpenTherm thermostat - CIRCA1 circuit
2 R-Bus: Baxi uSense connected room thermostat,
on/off thermostat, modulating thermostat or
OpenTherm thermostat - CIRCB1 circuit
3 R-Bus: Baxi uSense connected room thermostat,
on/off thermostat, modulating thermostat or
OpenTherm thermostat - CIRCC1 circuit
4 Programmable and 0-10 V input
5 Outdoor temperature sensor
6 Impressed current anode
7 Flow sensor - CIRCA1 circuit
8 Flow sensor - CIRCB1 circuit
9 Flow sensor - CIRCC1 circuit
10 Domestic hot water sensor on the DHW1 second
domestic hot water circuit
11 System sensor 2
12 System sensor 1
13 Pump and safety thermostat - CIRCA1 circuit
14 Three-way valve - CIRCA1 circuit
15 Pump and safety thermostat - CIRCB1 circuit
16 Three-way valve - CIRCB1 circuit
17 Domestic hot water tank pump when using a second
domestic hot water circuit
18 Connectors for S-BUS cables used for cascade
19 L-BUS connection
20 L-BUS connection to EHC–05 PCB
21 Tool service connector
22 ConnectorsMod-BUS
23 Coding wheel, selects the generator number in the
cascade
Description of the three-way valve and auxiliary circuit AD249
PCB
PCB AD249 is an additional board which is connected to the SCB-10 PCB
to enable it to control a third heating circuit and auxiliary functions.
6 Installation
40
7762758 - v05 - 19082020