Correct positioning of the outside temperature sensor is essential to proper indoor temperature control. The sensor
must be installed outside the building to be heated, about 2/3 of the way up a NORTH or NORTH-WEST facing wall, well
clear of any flues, doors, windows and out of direct sunlight.
Fixing the outdoor temperature sensor to the wall
− Unscrew the protective cover from the sensor,
turning it anti-clockwise, to access the sensor
terminals .
− Mark the position of the hole, and drill a 5x25
hole for the expansion plug.
− Fix the sensor casing to the wall using the ex-
pansion plug provided.
− Insert a two core cable (with cross section betwe-
en 0.5 and 1 mm2, not supplied) to connect the
sensor to the boiler .
− Connect the two wires of the cable to the sensor
terminals. Polarity is irrelevant.
− Connect the cable from the outdoor temperature
sensor to the boiler as instructed in the "ELECTRI-
CAL CONNECTIONS" section.
− Screw the protective cover back on the outdoor
temperature sensor.
9
Position the sensor on a smooth area of wall. Prepare a smooth contact area for the sensor casing if the wall is
made from exposed brick or other rough material.
9
Avoid joins in the cable between the outside sensor and the control panel. If different cable lengths have to be
joined, make sure that the joins are sealed and adequately protected.
9
If cable ducts are used to route the sensor connection cable, keep these well clear of any power cables (230Vac).
Correspondence table
Measured temperature (°C) – Resistance of outdoor temperature sensor (
Ω
).
2 .10
Outdoor temperature sensor
T (°C)
R (
Ω
)
T (°C)
R (
Ω
)
T (°C)
R (
Ω
)
-30
171423
5
28536
40
6640
-25
129435
10
22751
45
5513
-20
98663
15
18257
50
4600
-15
75800
20
14472
55
3856
-10
58718
25
11976
60
3247
-5
45830
30
9787
0
36036
35
8039
30
INSTALLER
