Control Connections
48
Electrical Connections (continued)
Connecting the outdoor temperature sensor
1. Remove cover of outdoor
temperature sensor.
2. Mount wall-mount base (cable entry
must point downward).
The outdoor temperature sensor should
be mounted 6.6 to 8.2 ft. / 2 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.
The outdoor temperature sensor must
not be covered by plaster. If mounting
on an unplastered wall, make
allowances for thickness of plaster or
remove sensor before plastering wall.
3. Route cable from the boiler control
board to the outdoor sensor.
Connect cable to sensor terminals
(wires are interchangeable).
Cable specifications:
2-wire cable, max. cable length
95 ft. / 35 m with a wire size of min.
AWG 16 copper.
Cable to the outdoor sensor must not
be laid near line voltage wiring
(120/240 V).
4. Connect the outdoor temperature
sensor to terminals X3.1/X3.2 on
the boiler control board (wires are
interchangeable).
5. Place cover on base and snap into
place.
5418 909 v1.6
123567 4
X3
2.
5.
1.
Fig. 43
3.
4.
3.
IMPORTANT
IMPORTANT
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