E
Connection via the contactor in the control panel or contactor
relay, part no. 7814 681
F
Plug
sÖ
for connection to the Vitotronic
G
3-core cable for power supply to the pump
Colour coding to DIN IEC 60757
BK
Black
BK*
Black wire with imprint
BN
Brown
BU
Blue
GNYE
Green/yellow
Grundfos heating circuit pumps, differential pressure-dependent
(Adjustable from proportional pressure to constant pressure)
Motor protection
The motor and the electrical equipment are protected against thermal
overload. No external motor protection is required.
230 V~, 50 Hz
Heating circuit connec-
tion
DN
25
32
40
50
Pump type
Alpha 2 25-60
Alpha 2 32-60
MAGNA
UPE 40-120
MAGNA
UPE 50-60
Speed range
n
min
-1
–
–
900-3580
680-1970
Power consumption
P
1
W
5-45
5-45
25-445
32-335
Current
I
A
0.05-0.38
0.05-0.38
0.16-2.0
0.2-1.51
Head
Heating circuit pump DN 25 and DN 32
50
60
500
600
1 1.5 2 2.5 3 3.5
Head mbar
300
40
20
0
10
30
400
200
0
100
kPa
0 0.5
Flow rate in m³/h
A
B
C
D
A
Operating range in differential pressure-dependent mode
Operation in stages
B
Stage 1
C
Stage 2
D
Stage 3
Head
Heating circuit pump DN 40
200
0
400
600
800
1000
0 2 4 6 8 10 12 14
Head
1200
1400
16 18 20
Flow rate in m³/h
mbar
kPa
20
0
40
60
80
100
120
140
Min.
Max.
Proportional pressure
0 2 4 6 8 10 12 14 16 18 20
Flow rate in m³/h
Min.
Max.
200
0
400
600
800
1000
Head
1200
1400
mbar
kPa
20
0
40
60
80
100
120
140
Constant pressure
Head
Heating circuit pump DN 50
600
700
100
0
200
300
400
500
0
Head
4
8
12 16 20 24 28 32
Flow rate in m³/h
Min.
Max.
mbar
60
70
10
0
20
30
40
50
kPa
Proportional pressure
Installation accessories
(cont.)
14
VIESMANN
Gas condensing boilers
7
5822 449 GB