Unical M 3000 S, Installation And Servicing Instructions

Page: 28 / 36

28
Instruction for the installer
3.15 - ADJUSTMENT OF THE CLIMATIC
CURVE
For an installation with two circuits, of which one working at
H.T. for radiators and one for L.T. floor heating:
- Adjust the maximum desired temperature in the H.T. circuit
through the potmeter placed in the front of the boiler panel
board.
A
B
C
A = Potmeter for the regulation of compensation curve.
B = Potmeter for the regulation of the outer non heating
temperature (WINTER/SUMMER).
C = Potmeter for theregulation of the maximum mixed flow
temperature.
With this solution it is possible to control the flow temperature
according to the variation of the outer temperature.
It is then necessary to configurate the climatic curve.
The curve is drawn by the introduction of the maximum and
minimum calculated flow temperatures: the first has to be
selected via the trimmer
''C'' , while the second is adjusted
through the parameter (2) of Regolafacile (dL = MINIMUM
HEATING TEMPERATURE).
Subsequently it is necessary, through the trimmer “
A ”, to adjust
the maximum flow temperature to the minimum outer tempe-
rature. This temperature, obviously, is different zone by zone
and depends on the climatic caracteristics of the installation
site (this corresponds to the minimum outer design tempera-
ture).
The minimum flow temperature, on the contrary, is automati-
cally assigned by the module in correspondance of an outer
temperature equal to the value adjusted on the trimmer
''B'' .
Once these parameters have been adjusted, the boiler will
select on the climatic curve a flow temperature avccording to
the temperature detected by the outer sensor.
The connection to a modulating boiler allows the climatic re-
gulation also in the high temperature circuit, by using the set-
ting of the boiler (parameter
Oc ).
If this setting is not available through the communication
(ALKON 28) the parameter
‘’Oc’’ for the high temperature is
detected by the position of the trimmer ‘’A’’.
10 °C
-20°C
-10°C 10°C 20°C Temp. Est.
Outer temperature range
controlled by the “A” potmeter
F
lo
w
te
m
p
er
a
tur
e r
a
ng
e
c
ont
ro
ll
e
d
b
y
t
h
e “C
” po
tm
et
er
Non heating temperature
range controlled by
the “B” potmeter
17°C
23°C
25 °C
35 °C
0°C
20 °C
30 °C
40 °C
50 °C
Riduzione notturna (-12°C)
Riduzione notturna (-4°C)
Setpoint
Z1
- Adjust through the trimmer ''B'' the non heating outer tem-
prature from which the user does not whish to have any
heating from the floor heating system.
- Adjust through the trimmer ''C'' the maximum temperature
desired in the low temperature circuit.