Viessmann Vitocontrol-S, WB2 Installation, Start-Up And Service Instructions Manual page 7

Outdoor temperature sensor
Mount outdoor temperature sensor
on the north or northwest outside
wall of the building. If the boiler is
intended to supply heat to the
south side of the building only (split
piping system), mount the sensor
on the south side.
Mount the sensor so that water
cannot infiltrate the sensor
housing.
Install sensor where it will not be
affected by heat sources such as
windows or ventilation openings.
The sensor should be installed far
enough above ground to prevent
accidental damage or tampering.
The outdoor sensor must not be
covered with mortar, stucco, paint
or any form of coating or siding. If
the outside wall is finished after the
sensor is installed, the sensor
should be removed and placed on
the finished wall.
To make the electrical connection,
use a 2-wire cable with a maximum
length of 115 ft./35 m and with a
minimum wire size of AWG 16
copper.
1.Slide protective cover from sen-
sor body.
2.Loosen the two slot-head screws
from main body and remove sen-
sor cover.
3.Fasten sensor body to wall with
single screw through middle of
body.
4.Remove cone-shaped strain relief
from sensor cover.
5.Cut wide end of cone to allow
wire/cable to be inserted into
sensor body. Size cone by
pushing wire/cable into wide end
of cone. Cut cone at the spot
where wire stops.
6.Remove wire/cable from cone
and reinsert into narrow end.
7.Push wire into body of sensor
and connect to screw terminals.
8.Secure wire in place with
supplied strain relief.
Re-attach sensor cover, tighten
screws and slide protective cover
into place.
WARNING
When extending wire, there is the
possibility of exposure to
electromagnetic interference.
Avoid running wires beside or near
high voltage 120/240 VAC
conductors. If proximity to high
voltage conductors cannot be
avoided, use stranded, twisted pair
or shield design wire. Ensure that
only one end of the shielding is
grounded.
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