Grundfos alpha2l User Manual

6
3. Applications
Contents:
3.1 System types
3.2 Pumped liquids
3.3 System pressure
3.4 Relative air humidity (RH)
3.5 Enclosure class
3.6 Inlet pressure.
3.1 System types
Fig. 2 Pumped liquids and operating conditions
GRUNDFOS ALPHA2 L is suitable for
• systems with constant or variable flows where it is desirable to
optimise the setting of the pump duty point
• systems with variable flow-pipe temperature.
3.2 Pumped liquids
Clean, thin, non-aggressive and non-explosive liquids, not containing
solid particles, fibres or mineral oil. See fig. 2.
In heating systems, the water should meet the requirements of accepted
standards on water quality in heating systems, e.g. the German standard
VDI 2035.
TM05 1923 4512
Max. 1.0 MPa (10 bar)
75 °C
Min.
0.005 MPa
0.05 bar
90 °C 110 °C
Min.
0.028 MPa
0.28 bar
Min.
0.108 MPa
1.08 bar
Max. 95% RH
IP 42
0.0 0.4 0.8 1.2 1.6 2.0 2.4
Q [m³/h]
0
2
4
6
[m]
H
0
20
40
60
[kPa]
p
0.0 0.2 0.4 0.6
Q [l/s]
ALPHA2L XX-50
ALPHA2L XX-40 / ALPHA2L XX-45
ALPHA2L XX-60
2
2
PHA2
2
2
2
2
P
HA2
P
HA2
AL
A
AL
AL
ALPHA2 L
2
PHA2
2
2
P
HA2
P
HA2
ALAL
AL
ALPHA2 L
Warning
The pump must not be used for the transfer of flammable liquids
such as diesel oil, petrol and similar liquids.

Grundfos alpha2l Specifications

General

Voltage	230 V
Protection Class	IP42
Maximum Operating Pressure	10 bar
Enclosure Class	IP42
Insulation Class	F
Pump Housing	Cast iron
Type	Circulator pump
Frequency	50 Hz
Approvals	CE
Connection	G 1"
Ambient Temperature	Up to 40°C