Electrical Installation, Set-Up; Checking The Scope Of Delivery; Selecting The Lines; Polarity - Vaillant sensoCOMFORT VRC 720f Manual De Uso

3

-- Electrical installation, set-up

Obstacles weaken the reception strength between the radio
receiver unit and the system control or outdoor temperature
sensor.
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

Checking the scope of delivery

Quantity Contents
1 System control
1 Radio receiver unit
1 VR 20 outdoor temperature sensor or VR 21 out-
door temperature sensor
1 Fixing material (2 screws and 2 wall plugs)
4 Batteries, LR06
1 Documentation
▶
Check that the scope of delivery is complete.
3.2

Selecting the lines

▶
Use standard commercial lines for the wiring.
▶
Do not use flexible ducts 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
3.3

Polarity

When connecting the eBUS line, there is no need to pay at-
tention to the polarity. If the connection cables are switched
over, communication will not be adversely affected.
3.4

Installing the radio receiver unit

The radio receiver unit can be installed on a heat generator
or on a ventilation unit with connected heat generators.
When installing the radio receiver unit on a heat generator,
the radio receiver unit can also be wall-mounted outside of
wet environments in order to improve the reception strength
and it can be connected using an extension cable.
0020288151_00 sensoCOMFORT Operating and installation instructions
≥ 0.75 mm²
≥ 0.75 mm²
≤ 50 m
≤ 125 m
-- Electrical installation, set-up 3
3.4.1 Installing the radio receiver unit and
connecting to the heat generator
Condition: The heat generator has an option to connect it directly and is not
installed in the wet environment.
A
▶
Install the radio receiver unit below the heat generator.
▶
Connect the radio receiver unit to the direct connection
below the heat generator.
Condition: The heat generator does not have an option to connect it directly
and/or is installed in the wet environment.
▶
Remove the flap on the radio receiver unit in accordance
with the figure.
▶
Remove the existing cable for the direct connection.
▶
Connect the eBUS cable, which is to be provided on-
site, in accordance with the figure.
▶
Seal the flap on the radio receiver unit.
B
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