Ariston NIMBUS COMPACT S NET Manual page 57

Restrictions of cooling operation
A
25
(10 ; 23)
20
UF
15
10
FC
5
(10 ; 5)
0
0 5 10 15 20
A - Flow water temperature (°C)
B - External air temperature (°C)
AVAILABLE PRESSURE
Pressure available for distribution on the installation.
pac 3 medium WH wilo yonos 100% pwm
800
700
600
500
400
300
200
100
0
0 500
Available pressure for sizes
i: 40 S - 50 S - 70 S - 70 S-T EXT
System Size Flowmeter OFF Threshold [l/h]
40 S
50 S
70 S - 70 S T
90 S - 90 S-T
110 S - 110 S-T
Available pressure
The curves indicated above show the available pressure of internal units.
In order to have a correct sizing of the system, the pressure drop curve of the entire circuit (in function of the nominal flow rate)
must stay below the available pressure curve everywhere. Pressure drop values depend on the specific installation.
You can install a supplementary circulation pump if the module's own unit is not powerful enough. For the electrical hookup, refer
to «Electrical circuit».
Warning: in case of installation of thermostatic valves on all terminals or zone valves, install a bypass to ensure the minimum
operating flow rate.
COMPRESSOR FREQUENCY TABLE
Heat Pump
4 kW
5 kW
7 kW
9 kW
11 kW
(43 ; 23)
(43 ; 5)
25 30 35 40 45 50
1000 1500 2000
l\h
348
348
486
630
768
Frequency min [Hz]
18
18
18
18
18
Restrictions of heating operation
A
-10,60
-20,45
-20,20
B
-30 -20 -10
Example 1: B = 35 and A = 33
pac 3 big wilo yonos 100% pwm
800
700
600
500
400
300
200
100
0
0 500
Available pressure for sizes
90 S - 90 S-T - 110 S - 110 S-T EXT
Flowmeter ON Threshold [l/h]
390
390
540
702
852
Frequency max (heat) [Hz]
80
100
90
75
90
70
60
50
40
30
20
15,20
10
0
0 10 20 30
1000 1500 2000
l\h
Nominal flow rate [l/h]
640
800
1120
1440
1755
Frequency max (cool) [Hz]
65
80
70
57
70
57 / GB
35,60
35,33
B
40
2500