20
20
0
0
1
2
3
4
5
6
7
8
0,5
1
1.5
2
2.5
3
3.5
4
0
0
10
20
30
40
50
60
0.5
1
1.5
2
2.5
3
3.5
4
CC4
CC3
CC2
CC1
CC1
CC2
CC3
CC4
PP3
PP3
CP3
PP2
PP2
PP1
PP1
CP2
CP1
CP3
CP2
CP1
Flow rate (m3/h)
Circulation unit head (m)
Flow rate (m3/h)
Power absorbed by circulation unit (W)
1.8 Circulation units
CONNECT LE
is equipped with high efficiency electronically controlled circulation units. The performance data of these units to be used to size the system is shown in the graph.
Available head of the circulation unit
Residual head available to the system
HIGH TeMPeRATURe
Residual head available to the system
LOW TEmPERATURE
Power absorbed by the circulation unit
b
When starting up for the first time and at least once a year, it is advisable to
check that the shaft of the circulation units rotate.This is necessary because,
especially after lengthy periods of inactivity, deposits and/or residue may stop
it rotating freely.
a
Do not run the circulation unit without water.
b
If there are flow regulator devices in the low temperature circuits (thermostatic,
electrical or motorized zone valves, etc.) it is recommended that the circulation
unit is set to "Proportional Head" and includes a differential by-pass on the
manifold.
PP1
LOW proportional head curve
PP2
AVERAGE proportional head curve
PP3
HIGH proportional head curve
CP1
LOW constant head curve
CP2
AVERAGE constant head curve
CP3
HIGH constant head curve
CC1
Curve 1 = 4 metres
CC2
Curve 2 = 5 metres
CC3
Curve 3 = 6 metres
CC4
Curve 4 MAX = 7 metres
0
0
1
2
3
4
5
6
7
8
0,5
1
1,5
Flow rate (m
3
/h)
Circulation unit head
(m)
2
2,5
3
3,5
4
Flow rate (m
3
/h)
CC4
CC3
CC2
CC1
PP3
CP3
PP2
PP1
CP2
CP1
Circulation unit head
(m)
0
0,5
1
1,5
2
2,5
3
CC1
CC2
CC3
CC4
PP3
PP2
PP1
CP3
CP2
CP1
0
1
2
3
4
5
6
7
8
0
0
1
2
3
4
5
6
7
8
0,2
0,4
0,6
0,8
1
1,2
1,4
1,6
1,8
CC4
CC3
CC2
CC1
PP1
PP2
PP3
CP3
CP2
CP1
Flow rate (m3/h)
Circulation unit head (m)
