Outdoor Temperature Sensor Installation - Viessmann VITOTRONIC 100 Installation, Start-Up And Service Instructions Manual

Electrical Connections

Outdoor Temperature Sensor Installation

16
Vitotronic 100, KW10B Installation, Start-up and Service
To mount outdoor temperature sensor, experience has
shown that the north or north-west outside wall of the
building is the best location. If, however, the boiler is
intended to supply heat to the south side of the building
only (split piping system), the sensor must be mounted
on the south side.
The sensor must be mounted so that water cannot
infiltrate the sensor housing.
Care must be taken to install the sensor where it will
not be affected by heat sources such as windows or
ventilation openings. The sensor should be installed far
enough above the ground to prevent accidental damage
or tampering. Operating temperature range is -60° F to
160° F (-50° C to 70° C). Total cable length from boiler
to sensor should not exceed 95 ft. (35 m) if AWG 18 gage
wire is used. This sensor cable should not be placed in
direct contact with line voltage.
1. Remove cover of outdoor temperature sensor.
2. Mount wall-mount base (cable entry must point
downward).
IMPORTANT
The outdoor temperature sensor should be mounted 6.6 ft.
to 8.2 ft. (2 m to 2.5 m) above ground level on the north
or northwest wall of the building. In case of a multi-storey
building, mount outdoor temperature sensor in the upper
half of the second floor.
Ensure that sensor is not located above windows, doors and
air vents, or immediately underneath a balcony or gutter.
In addition, 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.
3. Connect the outdoor temperature sensor to connector
X6, terminals 1.1 and 1.2 (as shown) on the boiler
control board (wires are non-polarized).
Cable specifications: 2-wire cable, max. cable length
95 ft. (35 m) with a wire size of min. AWG 18 copper.
IMPORTANT
Cable to the outdoor sensor must NOT be laid near line
voltage wiring (120/240 V).
4. Route cable from the boiler control board to the
outdoor sensor. Connect cable to sensor terminals
(wires are non-polarized).
5. Place cover on base and snap into place.