Brochure

2.3 ALPHA2 26-99 performance range
H
[ft]
50
45
35
30
25
20
15
10
40
5
0
H
[m]
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Q [US GPM]
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
Q [m³/h]
0.0 0.5 1.0 0.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0
Proportional pressure AUTOAdapt
H
[ft]
50
45
35
30
25
20
15
10
40
5
0
H
[m]
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Q [US GPM]
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
Q [m³/h]
0.0 0.5 1.0 0.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0
Constant pressure AUTOAdapt
Constant Pressure III
Constant Pressure II
Constant Pressure I
Proportional Pressure III
Proportional Pressure II
Proportional Pressure I
TM074500
Push-button
• Each time you press the push-button, the circulator setting is changed.
TM061857
Proportional pressure I
• The duty point of the pump will move up or down along the lowest proportional-pressure curve, depending on the heat
demand in the system.
• The pump head (pressure) is reduced at falling heat demand and increased at rising flow demand.
TM073286
Proportional pressure II
• The duty point of the pump will move up or down along the middle proportional-pressure curve, depending on the heat
demand in the system.
• The pump head (pressure) is reduced at falling heat demand and increased at rising flow demand.
TM073287
Proportional pressure III
• The duty point of the pump will move up or down along the highest proportional-pressure curve, depending on the heat
demand in the system.
• The pump head (pressure) is reduced at falling heat demand and increased at rising flow demand.
TM073288
Proportional pressure AUTOAdapt
• This function enables the circulator to control the pump performance automatically within the defined proportional pressure
range and automatically adjusts the pump performance to system demands over time.
TM061858
Constant pressure I
• The duty point of the pump will move left and right along the lowest constant-pressure curve depending on the flow demand in
the system.
• The pump head (pressure) is kept constant, irrespective of the flow demand.
TM073286
Constant pressure II
• The duty point of the pump will move left and right along the middle constant-pressure curve depending on the flow demand in
the system.
• The pump head (pressure) is kept constant, irrespective of the flow demand.
TM073287
Constant pressure III
• The duty point of the pump will move left and right along the highest constant-pressure curve depending on the flow demand
in the system.
• The pump head (pressure) is kept constant, irrespective of the flow demand.
TM073288
Constant pressure AUTOAdapt
• This function enables the circulator to control the pump performance automatically within the defined constant pressure range
and automatically adjusts the pump performance to system demands over time.
TM061858
ALPHA
2
10
Performance range