34
– use the tabs (3) to release the control panel (4)
– bring the panel forwards and downwards until it is horizontal
4
3
3
Fig. 49
– unscrew the screws (5) and remove the panel cover (6) care-
fully
– insert the connecting wires in the cable gland (7) and connect
the component wires to the terminal board (8) following the
indications provided on the terminal board.
5
6
TA1
CR
ME
TA2
SE
S2 AUX
S1 AUX
0/10V GND
ID1
ID2
3
2
1
4 5 6
9
8
7
10 11 12 13 14 15 16 17 18
S1
(PT1000)
7
8
Fig. 50
– bring the control panel (4) back to its original position and en-
sure that the tabs correcting lock it in place.
m
CAUTION
It is compulsory:
– to use an omnipolar cut-off switch, disconnect
switch, in compliance with EN standards (contact
opening of at least 3 mm)
– if the power cable is to be replaced, that ONLY a spe-
cial cable is used with a factory produced re-wired
connector, ordered as a spare part and connected 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.
6.14.1 External sensor
The boiler is prearranged for connection to an external air tem-
perature sensor and can operate with a sliding temperature.
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 diagram (Fig.
When fitting the sensor on the outside of the building, follow
the instructions provided on the packaging of the product itself.
Climatic curve
Delivery temperature
20
15
10
5
0
-10
-15
-5
-20
80
90
70
60
50
40
30
20
°C
°C
K=9
K=7
K=8
K=5
K=6
K=3
K=4
K=2
K=1
External temperature
Fig. 51