16
Correct positioning of the outside temperature sensor is essential to proper indoor climate 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 cover from the sensor casing to access
the sensor terminals and fixing holes.
- Use the sensor casing as a template to mark the drilling
points on the wall.
- Remove the sensor casing and drill 5x25 holes for the
expansion plugs.
- Fix the sensor casing to the wall using the two expan-
sion plugs provided.
- Route a two-core cable from the sensor to the boiler.
- Fit the cover on the sensor casing.
- Open the control panel and connect the sensor up
as instructed in the “Electrical connections” section.
Polarity is irrelevant.
- Once you have made all the necessary connections,
close the control panel, reversing the steps followed to
open it.
b
Position the outdoor temperature 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.
b
Avoid joins in the cable between the outdoor temperature sensor and the control panel. If different cable lengths
have to be joined, make sure that the joins are sealed and adequately protected.
b
If cable ducts are used to route the sensor connection cable, keep these well clear of any power cables (230Vac).
Maximum permitted sensor cable lengths (copper)
Cable size
0,25 0,50 0,75
1,0
1,5
mm
2
Max. length
20
40
60
80
120
m
CONNECTING THE OUTDOOR TEMPERATURE SENSOR