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5.5.2 Access to the instrument box
The following is installed in the instrument box:
the standard PCB CB-03 with connector X3.
the IF-01 PCB with connectors X4 and X5
1. Unscrew the two screws located under the front housing by a quarter
turn and remove the front housing.
2. Press the clips on the sides of the instrument box inwards slightly.
3. Tilt the instrument box forwards.
4. Press the clip on the side of the instrument box flap inwards slightly.
5. Open the instrument box flap.
The connector X3 on the CB-03 PCB is now accessible.
6. Release the 4 clips of the instrument box cover gently with a
screwdriver.
7. Lift the instrument box cover
The connectors X4 and X5 on the IF-01 PCB are now accessible.
8. Guide the relevant connection cable(s) through the round grommet(s)
on the boiler's bottom plate.
9. Guide the relevant connection cable(s) through the instrument box via
the cable ducts provided.
10. Undo the strain relief clip(s) and feed the cable(s) underneath.
11. Connect the cables to the appropriate terminals on the connector.
12. Press the strain relief clip(s) firmly into place.
13. Close the instrument box.
5.5.3 Connection options for the connection PCB - CB-03
The boiler is fitted with a connection PCB, to which various thermostats
and regulators can be connected.
R-Bus Room unit (thermostat) connector
BL Blocking input
RL Release input
Tout Outdoor sensor connector
Tdhw DHW sensor connector
Connecting a modulating room thermostat
The boiler is fitted with a R-Bus connection as standard instead of an OT-
connector. The R-Bus connector supports the following types:
Fig.17 Access to the instrument box
AD-3001411-01
3
2
2
1
90 º
Fig.18
AD-3001412-01
5
4
Fig.19
AD-3001413-01
7
6
Fig.20
AD-3001415-01
8
11
10
9
12
Fig.21 Connectors on the connection PCB
AD-3001367-01
R-Bus Tout
BL RL
Tdhw
X03
5 Installation
7684359 - v.11 - 13122021 25
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