- 60 -
INST
ALLA
TION
COMMISSIONING
7.10 Setting the K coefficient of the
external temperature probe
The boiler is set with a K coefficient equal to
zero for boiler functioning without the probe
connected.
If the boiler is
NOT EQUIPPED
with the re-
mote control (optional) refer to Fig. 7.15.
Fig. 7.15
External temperature °C
20
20
15
10
5
0
-5
-10 -15 -20 -25
30
40
50
60
70
80
C.h. flow temperature °C
K=6 K=4 K=3
K=2
K=1,5
K=1
K=0,5
If the boiler is
EQUIPED
with the remote con-
trol (optional) refer to Fig. 7.16.
In this case K setting must be done from the
remote control.
Fig. 7.16
External temperature °C
20
20
15
10
5
0
-5
-10 -15 -20 -25
30
40
50
60
70
80
C.h. flow temperature °C
K=6 K=4
K=3
K=2
K=1,5
K=1
K=0,5
The K coefficients is a parameter that increas-
es or reduces the boiler flow temperature
when the outside temperature changes.
When installing the external probe it is neces-
sary to set this parameter based on the effi-
ciency of the heating plant in order to optimise
the flow temperature (Fig. 7.16).
E.g. In order to have a flow temperature at the
heating plant of 60°C with an external tem-
perature of -5°C, set a K at 1.5 (sectioned line
in Fig. 7.16).
Sequence for setting the K coefficient
• Enter in "programming mode" by pressing
keys 12 - 15 - 16 (Fig. 7.17) for 10 seconds
at the same time until the letters
P01
are
displayed on the LCD display, indicating
that "parameter 01, has been activated (Fig.
7.18).
Fig. 7.17
9
10
11
12 13
14
15
16
17
Fig. 7.18
• Scroll the various parameters using keys 15
or 16 until the letters
P15
are displayed on
the LCD display, indicating that "parameter
15" (Fig. 7.19) has been activated.
Summary of Contents for Activ A 25S
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