Electrical Installation; Terminal; Connect The Control To The Boiler With A "24V=Rt Terminal - Vaillant VRT 350 Installation Instructions Manual

9. Carefully press the control into the wall base until the
locking tabs on the control are heard to latch into the
sides of the wall base.
5

Electrical installation

When connecting the eBUS line, there is no need to pay at-
tention to the polarity. If the two connections are switched
around, communication is not affected.
If you want to use a VR 66, observe the installation instruc-
tions for the VR 66 Control Centre.
5.1 Connect the control to the boiler with a "3-4-5

Terminal"

1. Disconnect the power supply to the boiler.
2. Disconnect the boiler from the power grid by pulling
out the mains plug or removing the power supply to the
boiler using a partition with a contact gap of at least
3 mm.
3. Secure the power supply to the boiler against being
switched back on again.
4. Check that there is no voltage in the boiler.
8
1
1 Control terminal block
5. Check whether the bridge is installed between termin-
als 3 and 4 on the PCB of the electronics box and, if re-
quired, install the bridge between terminals 3 and 4.
6. Connect the eBUS line to the terminal block (1) in the
wall base of the control.
7. Connect the eBUS line to the terminal block of the
boiler (2).
5.2 Connect the control to the boiler with a
"24V=RT terminal"
1. Disconnect the power supply to the boiler.
2. Disconnect the boiler from the power grid by pulling
out the mains plug or removing the power supply to the
boiler using a partition with a contact gap of at least
3 mm.
Installation instructions 0020131957_02
2
2 Boiler terminal block