Ariston NIMBUS PLUS 110 S-T EXT - Page 52

52 / 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.
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  ow rate)
must stay below the available pressure curve everywhere. Pressure drop values depend on the speci c 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  ow rate.
(43 ; 22)
(43 ; 5)
(10 ; 5)
(10 ; 22)
0
5
10
15
20
25
0 5 10 15 20 25 30 35 40 45 50
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
0
100
200
300
400
500
600
700
800
0 500 1000 1500 2000
mbar
l\h
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  ow rate [l/h]
40 S EXT 280 360 640
50 S EXT 350 450 800
70 S EXT 490 630 1120
70 S-T EXT 490 630 1120
90 S-T EXT 630 810 1440
110 S-T EXT 770 990 1755
Available pressure for sizes: : 40 S - 50 S - 70 S - 70 S-T EXT Available pressure for sizes: : 90 - 110 S-T EXT
1
Example: 1B = 35 and A = 33