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8.6 Operating conditions
8.6.1 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 product starts after approximately 5 seconds.
If a higher number of start and stops are required, use a digital input for external start and stop when starting and stopping the product.
When started via an external on and off switch, the product starts immediately.
8.6.2 Ambient temperature
8.6.2.1 Ambient temperature during storage and transportation
Description
Minimum
Maximum
8.6.2.2 Ambient temperature during operation
Description
Minimum
Maximum
*
The motor can operate with the rated power output (P2) at 50 °C. Continuous operation at higher temperatures reduces the expected product life. If the motor
operates at ambient temperatures between 50 and 60 °C, select an oversized motor. Contact Grundfos for further information.
8.6.3 Installation altitude
The installation altitude is the height above sea level of the installation site.
Products installed up to 1000 m above sea level can be loaded 100 %.
The motors can be installed up to 3500 m above sea level.
Products 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.
The motor output power (P2) in relation to the altitude above sea level is shown in the graph.
Y
100
90
80
70
60
500
1500
2500
Pos.
Y
X
To maintain the galvanic isolation and ensure correct clearance according to EN60664-1:2007, adapt the supply voltage to the altitude.
The supply voltage for a single-phase motor in relation to the altitude is shown in the graph.
1
250
240
230
220
210
200
0
500
1500
2500
70
3 x 200-240 V
-20 °C
40 °C
X
3500
Description
P2 [%]
Altitude [m]
2
3500
Temperature
-30 °C
60 °C
3 x 380-500 V
-20 °C
50 °C
*
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