31
C607215 - GB
INSTRUCTIONS FOR FITTERS
27. CONNECTING THE EXTERNAL PROBE
The boiler is provided with the connection for an external probe supplied as an accessory.
For connection, see the figure below (terminals 3-4) as well as the instructions supplied with the probe itself.
Figure 16
0801_0902 / C
G_1852
TERMINAL BLOCK
M2
With the external probe connected it is possible to regulate the heating delivery temperature in two different ways.
If the climate controller has been installed in the boiler (section 18.1), the regulation of the heating delivery temperature depends on
the
K REG
curve (Chart 3) which is manually set using the keys
+/-
.
If the climate controller has been installed on the wall (section 18.2), the regulation of the heating delivery temperature is automatic.
The electronic management automatically sets the correct climate curve, depending on the external temperature and on the ambient
temperature found (see also chapter 20.1).
IMPORTANT
:
the value of the delivery temperature
TM
depends on the setting of the parameter F16 (chapter 21). The max.
settable temperature may in fact be 85 or 45 °C.
CN5
0711_1601 / C
G_1987
Connect the cable, supplied as an accessory with the external
probe, to the connector
CNn5
of the boiler electronic board as
illustrated in figure 16.1.
Remove the two-pin terminal block, connected to the cable, and
connect the terminals to the terminals
3-4
on the terminal block
M2
as illustrated in figure 16.
Figure 16.1
