Circulation Units - Riello BAG3 AP Instructions For The Installer And For Technical Assistance

GENERAL
Before any of the connections are made, all the piping must be
thoroughly fl ushed to remove any residue which could compro-
mise the proper functioning of the BAG
The plumbing connections to the boiler and the system must be
carried out rationally, as indicated in the fi gure.
Direct connections can be made using the female couplings on
the BAG 3 delivery and return pipes or cocks (not supplied) can

1.8 Circulation units

BAG 3 is equipped with high effi ciency 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 1.5
Residual head available to the system
for BAG 3 AP
8
7
6
5
4
3
2
1
0
0 0,5 1 1,5
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
9
When starting up for the fi rst 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.
3
.
CP3
2 2.5 3 3.5
Flow rate (m3/h)
CP3
2 2,5 3 3,5
3
Flow rate (m /h)
be fi tted on the system side. These cocks are very useful when
maintenance is carried out, as they allow just the BAG
drained without having to drain the entire system.
9
Check that the expansion vessel on the boiler has suffi cient
capacity for the size of the system.
9
Ensure that the pipe connection holes from the BAG
boiler are sealed.
Power absorbed by the circulation unit
60
50
40
30
20
10
0
4 0 0.5 1
Residual head available to the system
for BAG 3 3 AP / BAG
8
7
6
5
4
3
2
1
0
4 0 0,5
CC1 Curve 1 = 4 metres
CC2 Curve 2 = 5 metres
CC3 Curve 3 = 6 metres
CC4 Curve 4 MAX = 7 metres
9
If there are fl ow 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.
22
1.5 2 2.5 3
Flow rate (m3/h)
3 2 AP
1 1,5 2 2,5
3
Flow rate (m /h)
3
to be
3
to the
3.5 4
3