Outdoor Sensor Connections - Riello ALUDOMUS SOLAR KV/200 20 ISC SOLAR Installation And Maintenance Manual

2 . 1 1 Outdoor sensor connections

Correct positioning of the outdoor 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 outside sensor to the wall
− Unscrew (anti-clockwise) the cover from the
sensor casing to access the sensor terminals and
fixing holes.
− Use the sensor casing as a template and mark
the points to drill 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
expansion plugs provided.
− Insert a two core cable (with cross section betwe-
2
en 0.5 and 1mm , 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.
9
Position the sensor on a smooth area of wall. Pre-
pare a smooth contact area for the sensor casing if
the wall is made from exposed brick or other rough
material.
9
Avoid junctions in the cable between the outside
sensor and the control panel. If different cable
lengths have to be joined, make sure that the jun-
ctions are sealed and adequately protected.
9
If cable ducts are used to route the sensor connec-
tion cable, keep these well clear of any power ca-
bles (230Vac).
Correspondence table
Measured temperature (°C)
Resistance of outdoor temperature sensor (Ω).
T (°C) R (Ω) T (°C)
-50 43907 -5
-45 31840 0
-40 23374 5
-35 17359 10
-30 13034 15
-25 9889 20
-20 7578 25
-15 5861 30
-10 4574 35
41
INSTALLER
R (Ω) T (°C) R (Ω)
3600 40 574,7
2857 45 482.8
2284 50 407.4
1840 55 345.3
1492 60 293.8
1218 65 250.8
1000 70 214.9
826.8 75 184.8
687.5