57 / GB
A - Flow water temperature (°C)
B - External air temperature (°C)
Restrictions of cooling operation
Restrictions of heating operation
AVAILABLE PRESSURE
Pressure available for distribution on the installation.
Example 1: B = 35 and A = 33
0
100
200
300
400
500
600
700
800
0
500
1000
1500
2000
mbar
l\h
pac 3 medium WH wilo yonos 100% pwm
(43 ; 23)
(43 ; 5)
(10 ; 5)
(10 ; 23)
UF
0
5
10
15
20
25
0
5
10
15
20
25
30
35
40
45
50
FC
A
B
-20,45
-10,60
35,60
35,33
15,20
-20,20
0
10
20
30
40
50
60
70
-30
-20
-10
0
10
20
30
40
B
A
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.
Available pressure for sizes
i: 40 S - 50 S - 70 S - 70 S-T EXT
Available pressure for sizes
90 S - 90 S-T - 110 S - 110 S-T EXT
COMPRESSOR FREQUENCY TABLE
Heat Pump
Frequency min [Hz]
Frequency max (heat) [Hz]
Frequency max (cool) [Hz]
4 kW
18
80
65
5 kW
18
100
80
7 kW
18
90
70
9 kW
18
75
57
11 kW
18
90
70
pac 3 big wilo yonos 100% pwm
0
100
200
300
400
500
600
700
800
0
500
1000
1500
2000
2500
mbar
l\h
System Size
Flowmeter OFF Threshold [l/h]
Flowmeter ON Threshold [l/h]
Nominal flow rate [l/h]
40 S
348
390
640
50 S
348
390
800
70 S - 70 S T
486
540
1120
90 S - 90 S-T
630
702
1440
110 S - 110 S-T
768
852
1755