Technical Data; Operating Conditions; Megging; Technical Data, Single-Phase Motors - Grundfos LCSE Installation And Operating Instructions Manual

10. Technical data

10.1 Operating conditions

10.1.1 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 and stopping the pump.
When started via an external on/off switch, the pump starts
immediately.
10.1.2 Ambient temperature
Ambient temperature during storage and transportation
Minimum: -22 °F (-30 °C)
Maximum: 140 °F (60 °C).
Ambient temperature during operation
Minimum: -4 °F (-20 °C)
Maximum: 122 °F (50 °C).
The motor can operate with the rated power output (P2) at 122 °F
(50 °C), but continuous operation at higher temperatures reduces
the expected product life. If the motor is to operate at ambient
temperatures between 122 °F (50 °C) and 140 °F (60 °C), select
an oversized motor. Contact Grundfos for further information.
10.1.3 Installation altitude
If the motor is installed above 6560 ft (2000 m), it
does not comply with SELV/PELV classification.
Installation altitude is the height above sea level of the installation
site.
Motors installed up to 3280 ft (1000 meters) above sea level can
be loaded 100 %.
• Motors installed more than 3280 ft (1000 meters) above sea
level must not be fully loaded due to the low density and
consequent low cooling effect of the air. See fig. 72.
P2
[%]
1
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0.90
0.89
0.88
0
0 3281 3937 4593 5249 5906 6562 7218
Fig. 72 Derating of motor output power (P2) in relation to
altitude above sea level
62
10.1.4 Humidity
Maximum humidity: 95 %.
If the humidity is constantly high and above 85 %, open the drain
holes in the drive-end flange. See section
covers (not supplied by
10.1.5 Motor cooling
To ensure cooling of motor and electronics, observe the following:
• Position the motor in such a way that adequate cooling is
ensured. See section
• The temperature of the cooling air must not exceed 122 °F (50
°C).
Keep cooling fins and fan blades clean.

10.2 Megging

Do not meg an installation incorporating MLE motors, as the
built-in electronics may be damaged.

10.3 Technical data, single-phase motors

10.3.1 Supply voltage
• 1 x 200-240 V - 10 %/+ 10 %, 50/60 Hz, PE.
Check that the supply voltage and frequency correspond to the
values stated on the nameplate.
Recommended fuse size
Motor size
Hp [kW]
0.33 - 1 (0.25 - 0.75)
1 1/2 - 2 (1.1 - 1.5)
You can use standard as well as quick-blow or slow-blow fuses.
10.3.2 Leakage current
Ground leakage current less than 3.5 mA, AC.
Ground leakage current less than 10 mA, DC.
The leakage currents are measured in accordance with EN
61800-5-1:2007.
[ft]
Fig. 2 Examples of
Grundfos).
4.1.5 Ensuring motor cooling.
Minimum Maximum
[A]
6
10
[A]
10
16