Circulation Units - Riello BAG3 MIX FAMILY COND Instructions For The Installer And For Technical Assistance

1.8 Circulation units

3
BAG 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
8
7
6
5
4
3
2
1
0
0 0,5 1
Residual head available to the system
HIGH TEMPERATURE
8
7
6
5
4
3
2
1
0
4 0 0,5
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
9
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 pe-
riods of inactivity, deposits and/or residue may stop it rotat-
ing freely.
0
Do not run the circulation unit without water.
CP3
1.5 2 2.5 3
Flow rate (m3/h)
1 1,5 2 2,5
Flow rate (m /h)
3
Power absorbed by the circulation unit
60
50
40
30
20
10
0
3.5 4 0 0.5
Residual head available to the system
LOW TEMPERATURE
8
7
6
5
4
3
2
1
0
3
0 0,2
9
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.
24
1 1.5 2 2.5
Flow rate (m3/h)
0,4 0,6 0,8 1 1,2
Flow rate (m3/h)
3 3.5 4
1,4 1,6 1,8