Technical Data; Operating Conditions; Ambient Temperature And Altitude; Sound Pressure Level - Grundfos MTS Serie Manual De Instrucciones

7. Technical data

7.1 Operating conditions

7.1.1 Ambient temperature and altitude

2.2 - 22 MG
30-200 Siemens
If the ambient temperature exceeds the above
maximum temperatures or the pump is installed at an
altitude exceeding the above altitudes, 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.
If this is the case, it may be necessary to use a motor
with a higher rated output.
P2
[%]
100
90
80
70
60
50
20 25 30 35 40 45 50 55 60 65 70 75 80
1000
Fig. 9 The maximum motor output (P2)
depends on the ambient temperature
and altitude
Pos. Description
1 2.2 - 22 kW IE3 MG motors
2 30-200 kW IE3 Siemens motors
Example:
Pump with a 2.2 kW IE3 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.
IE3 +60 3500
IE3 +55 2750
1
2
t [°C ]
2250 3500 4750 m
7.1.2 Humidity
Relative humidity: Max. 85 %.

7.1.3 Sound pressure level

Measuring conditions:
• Distance to the pump: 1 m
• Operation: Cavitation-free
• Motor: IEC standard motor
• Tolerance: ± 3 dB(A).
The MTS design allows gentle, even, virtually
pulsation-free and low-noise pumping. The noise
emission lies between 56 and 74 dB(A) depending
on speed, pump size and installation. MTS pumps
operate significantly quieter than rotary-lobe and
centrifugal pumps with comparable performance.
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