Electrical Installation, Set-Up; Selecting The Lines; Connecting A System Control To The Ventilation Unit - Vaillant sensoCOMFORT VRC 720 Manual De Uso E Instalación

3

-- Electrical installation, set-up

Only qualified electricians may carry out the electrical install-
ation.
The heating installation must be decommissioned before
work is carried out on it.
3.1

Selecting the lines

▶
Do not use flexible lines for power supply cables.
▶
Use sheathed cables for power supply cables (e.g. NYM
3 x 1.5).
Line cross-section
eBUS line (extra-low
voltage)
Sensor line (extra low
voltage)
Line length
Sensor lines
Bus lines
3.2 Connecting a system control to the
ventilation unit
1. Connect the system control to the ventilation unit as de-
scribed in the installation instructions for the ventilation
unit.
Condition: Ventilation unit connected to the eBUS without VR 32, Ventila-
tion unit without eBUS heat generator
▶
Connect the eBUS line to the eBUS terminals in the sys-
tem control's wall base.
▶
Connect the eBUS line to the eBUS terminals on the
ventilation unit.
Condition: Ventilation unit connected to the eBUS with VR 32, Ventilation
unit with up to two eBUS heat generators
▶
Connect the eBUS line to the eBUS terminals in the sys-
tem control's wall base.
▶
Connect the eBUS line to the eBUS of the heat gener-
ator.
▶
Set the address switch for the VR 32 in the ventilation
unit to position 3.
Condition: Ventilation unit connected to the eBUS with VR 32, Ventilation
unit with more than two eBUS heat generators
▶
Connect the eBUS line to the eBUS terminals in the sys-
tem control's wall base.
▶
Connect the eBUS line to the common eBUS on the
heat generator.
▶
Determine the highest possible position on the address
switches of the VR 32 for the connected heat generator.
▶
Set the address switch of the VR 32 in the ventilation
unit to the second highest position.
0020287900_00 sensoCOMFORT Operating and installation instructions
≥ 0.75 mm²
≥ 0.75 mm²
≤ 50 m
≤ 125 m
-- Electrical installation, set-up 3
15