2.13.1 External Sensor - Sime Brava Slim HE 25 T Manual De Instalación Y Mantenimiento

EN
– remove the screws (3) securing the control panel (4)
– move the panel (4) upwards (a) but keeping it in the side
guides (5) to the end of travel
– bring it forwards and down (b) until it is horizontal
4
b
3
– insert the connection wires into the cable gland (6) and the
opening (7) on the control panel
6
7
– bring the control panel (4) to the original position and se-
cure it with the screws (3) which were removed previously
– connect the component wires to the terminal board (8) fol-
lowing the indications provided on the data plate (9).
4
9
8
a 5
Fig. 19
Fig. 20
3
3
Fig. 21
m
CAUTION
It is compulsory:
– to use an omnipolar cut-off switch, disconnect
switch in compliance with EN Standards
– if the power cable is to be replaced, that ONLY a
special cable is used with a factory produced re-
wired connector, ordered as a spare part and con-
nected by a professionally qualified person
– to connect the earth wire to an effective earthing
system (*)
– that before any intervention on the boiler, the
mains power is disconnected by setting the main
system switch to "OFF".
(*) The manufacturer is not responsible for any damage
caused by failure to earth the appliance or failure to ob-
serve the information provided in the wiring diagrams.
d
IT IS FORBIDDEN
To use water pipes for earthing the appliance.

2.13.1 External sensor

The boiler is prearranged for connection to an external air
temperature sensor and can operate with a sliding temper-
ature.
This means that the delivery temperature sent to the boiler
can vary on the basis of the external temperature depending
on the climatic curve selected from those shown in the dia-
phragm (default curve no. 20).
When fitting the sensor on the outside of the building, follow
the instructions provided on the packaging of the product it-
self.
Climatic curve
Delivery temperature
40 35
°C
100
90
80
70
60
50
40
30
20 10 0
m
CAUTION
The curves are calculated with an air temperature of
20°C. By acting on the knob
the user can change the delivery temperature with
which the curve will be calculated by ±5°C.
30 27,5
25 22,5
20
17,5
15
12,5
10
7,5
5
2,5
°C
-10 -20
-30
External temperature
Fig. 22
t on the control panel,
73