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8. Operating conditions
8.1 Maximum number of starts and stops
The number of starts and stops via the power supply
must not exceed four times per hour.
When switched on via the power supply, the pump
starts after approximately 5 seconds.
If a higher number of starts and stops is desired, use
the input for external start-stop when
starting/stopping the pump.
When started via an external on/off switch, the pump
starts immediately.
8.2 Ambient temperature
8.2.1 Ambient temperature during storage and
transportation
Minimum: -30 °C
Maximum: 60 °C.
8.2.2 Ambient temperature during operation
The motor can operate with the rated power output
(P2) at 50 °C, but continuous operation at higher
temperatures reduces the expected product life. If
the motor is to operate at ambient temperatures
between 50 and 60 °C, select an oversized motor.
Contact Grundfos for further information.
8.3 Installation altitude
Installation altitude is the height above sea level of
the installation site.
Motors installed up to 1000 m above sea level can
be loaded 100 %.
The motors can be installed up to 3500 m above sea
level.
Fig. 13 Motor output power in relation to altitude
In order to maintain the galvanic isolation and ensure
correct clearance according to EN 60664-1:2007,
you must adapt the supply voltage to the altitude:
Fig. 14 Motor output power in relation to altitude
3 x 200-240 V 3 x 380-500 V
Minimum -20 °C -20 °C
Maximum 40 °C 50 °C
Motors installed more than 1000 m above
sea level must not be fully loaded due to
the low density and consequent low
cooling effect of the air.
TM05 5243 3717TM05 5243 3717
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