Grundfos CRK 2 User Manual

English (GB)
9
6. Technical data
* Applies to pump version F.
6.1 Ambient temperature
If the ambient temperature exceeds the above
temperature values or the pump is installed at an
altitude exceeding the above altitude values, the
motor must not be fully loaded due to the risk of
overheating. Overheating may result from excessive
ambient temperatures or the low density and
consequently low cooling effect of the air.
In such cases, it may be necessary to use a motor
with a higher rated output.
Fig. 3 Relationship between motor output (P2)
and ambient temperature/altitude
Example: A pump with a 1.1 kW IE2 MG motor: If
this pump is installed 4750 m above sea level, the
motor must not be loaded more than 88 % of rated
output. At an ambient temperature of 75 °C, the
motor must not be loaded more that 78 % of rated
output. If the pump is installed 4750 m above sea
level at an ambient temperature of 75 °C, the motor
must not be loaded more than 88 % × 78 % = 68.6 %
of rated output.
6.2 Maximum permissible operating
pressure and liquid temperature for the
shaft seal
Fig. 4 MTR 1s to 64
Pump type CRK MTR
Minimum liquid temperature [°C] -10 -10
Maximum liquid temperature [°C] +90
+90
(120*)
Maximum operating pressure [bar] 25 25
Enclosure class IP55 IP55
Motor power [kW] Motor make Motor efficiency class Max. ambient temperature at full load [°C] Max. altitude above sea level [m] Pos. in output curve in fig.
0.06 - 0.18 Siemens - +40 1000 1
0.25 - 0.55 MG - +40 1000 1
0.75 MG IE2 +60 3500 2
1.1 - 22 MG IE2 +60 3500 2
30-45 Siemens IE2 +55 2750 3
TM04 4914 2209
TM02 7854 4303
20 25 30 35 40 45 50 55 60 65 70 75 80
50
60
70
80
90
100
[%]
P2
1
2
3
t[°C]
1000 2250 3500 4750 m
-20 -10 0 10 20 30 40 50 60 70 80 90 100 110
0
5
10
15
20
25
30
35
p [bar]
HUUE / HUUV
t [°C]

Grundfos CRK 2 Specifications

General

Brand	Grundfos
Model	CRK 2
Category	Water Pump
Language	English