Ariston NIMBUS COMPACT S NET Manual page 84

To set the temperature adjustment parameters, simultaneously
press and hold back " " and "OK" buttons until "Enter code"
appears on the display. Turn the knob to enter the technical
code (234) then press OK; the display will show Technical area.
Turn the knob and select
- Complete Menu.
Press the OK button..
4 Zone 1 Parameters
Press the OK button.
Turn the knob and select:
4.5 Cooling
Press the OK button.
Turn the knob and select:
4.5.0 T set cool Z1
Press the OK button. Turn the knob and set the delivery tempe-
rature setpoint, for thermoregulation off or fixed point.
Press the OK button. Turn the knob and select:
4.5.1 Zone 1 Cooling Temp Range
Press the OK button.
Turn the knob and select the temperature range:
- Fan Coil
- Underfloor
Press the OK button.
Turn the knob and select:
4.5.2 Thermoregulation
Press the OK button. Turn the knob and set the type of tempe-
rature adjustment installed:
- 0 ON/OFF
- 1 Fix Flow T
- 2 Outdoor T Only
4.5.3 Slope
Press the OK button. Turn the knob and set the curve in relation
to the type of cooling system, then press the OK button.
- Fan Coil (curves from 18 to 33)
- Underfloor (curves from 0 to 30)
The checking process for the suitability of the curve requires a
long period of time during which several adjustments may be
necessary.
Graph A (Fan Coil)
°C 12
11
18
10
9
8
7
6
0 5 10 15
outdoor temperature
84 / GB
33
25
20 25 30 35 40
When the outdoor temperature rises (summer), three condi-
tions may arise:
1. The temperature of the room may rise, indicating that a gen-
tler curve should be set;
2. The temperature of the room may fall, indicating that a stee-
per curve should be set;
3. The temperature of the room remains constant, indicating
that the set curve is exactly right.
Once you have found the curve which maintains the room
temperature at a constant level, check the actual temperature
value.
IMPORTANT:
If the room temperature is higher than the desired value, the
curve must be shifted downwards decreasing the pameters
4.5.3. If the room temperature is too low, the curve should be
shifted upwards increasing the pameters 4.5.3. If the tempera-
ture of the room corresponds to the desired value, the curve
is correct.
In the graph below, the curves have been divided into two
groups:
- fan coil systems (graph A)
- under-floor systems (graph B)
Press the OK button. Turn the knob and select:
4.5.4 Offset
Press the OK button. Turn the knob and set the most suitable
value. Press the OK button to confirm.
Turn the knob and select:
4.5.6 Max T
Press the OK button. Turn the knob and set the most suitable
value according to zone temperature range (see parameter
4.5.1), then press the OK button.
Turn the knob and select:
4.5.7 Min T
Press the OK button. Turn the knob and set the most suitable
value according to zone temperature range (see parameter
4.5.1), then press the OK button.
Repeat the steps described to set the values for zones 2 (if pre-
sent), selecting menu 5.
Graph B (Underfloor)
°C 23
30
25
22
20
20
15
21
10
19
5
18
17
45 °C
0 5 10 15 20 25 30 35
outdoor temperature
40 45 °C