Grundfos NB 80-200/222VAXEF1BESBQQEWX2, Инструкция по установке и эксплуатации

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13. Technical data
13.1 Operating conditions
13.1.1 Ambient temperature and altitude
Do not exceed the allowable maximum
ambient temperature stated on the motor
nameplate. If nothing is stated, then the
maximum allowed ambient temperature is
40 °C.
The ambient temperature and the installation altitude
are important factors for the motor life as they affect
the life of the bearings and the insulation system.
If the ambient temperature exceeds the
recommended maximum ambient temperature or the
installation altitude exceeds the recommended
maximum altitude above sea level, seeing the figure
below, the motor must not be fully loaded due to 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 output.
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
TM044914
The maximum motor output depends on the
ambient temperature and altitude
Pos. Description
1 0.25 - 0.55 kW MG motors
2
0.75 - 22 kW MG motors, IE2/IE3
0.75 - 450 kW MMG-H motors, IE2
0.25 - 200 kW MMG-H motors, IE3
3
0.75 - 462 kW Siemens motors, IE2
0.25 - 462 kW Siemens motors, IE3
0.75 - 462 kW Siemens motors, IE4
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 the
rated output. At an ambient temperature of 75 °C, the
motor must not be loaded more than 78 % of the
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 % x 78 % =
68.6 % of the rated output.
13.1.2 Liquid temperature
Liquid temperature: -40 to +140 °C
The maximum liquid temperature is stated on the
pump nameplate. It depends on the shaft seal
chosen.
For EN-GJL-250 cast-iron pump housings, local
regulations may not allow liquid temperatures above
120 °C.
13.1.3 Maximum operating pressure
Do not exceed the maximum operating
pressure stated on the pump nameplate.
1
2
3
TM075513
Pressures in the pump
Pos. Description
1
Maximum operating pressure, that is
pressure above atmospheric pressure
2 Pump pressure
3 Inlet pressure
The total value of the inlet pressure and the pump
pressure must be lower than the maximum operating
pressure stated on the pump nameplate. Operation
against a closed valve gives the highest operating
pressure.
13.1.4 Minimum inlet pressure
Pay attention to the minimum inlet pressure to avoid
cavitation. The risk of cavitation is higher in the
following situations:
•
The liquid temperature is high.
• The flow rate is considerably higher than the
pump's nominal flow rate.
• The pump is operating in an open system with
suction lift.
• The liquid is sucked through long pipes.
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English (GB)