Servicing The Product; Motor; Pump; Cleaning The Product - Grundfos CRE Installation And Operating Instructions Manual

10. Servicing the product

DANGER
Electric shock
Death or serious personal injury
‐
Switch off the power supply to the motor and to the
signal relays. Wait at least 5 minutes before starting
any work on the motor. Make sure that the power
supply cannot be switched on accidentally.
DANGER
Magnetic field
Death or serious personal injury
‐
Do not handle the motor or rotor if you have a
pacemaker.

10.1 Motor

For servicing the product, download the service instructions for the
motor by using the following link or QR code.
http://net.grundfos.com/qr/i/98413121

10.2 Pump

Service documentation is available in Grundfos Product Center
(http://product-selection.grundfos.com/).
If you have any questions, please contact the nearest Grundfos
company or service workshop.

10.3 Cleaning the product

WARNING
Electric shock
Death or serious personal injury
‐
Switch off the power supply to the motor and to the
signal relays. Check that the terminal box cover is
intact before spraying water on the product.
In order to avoid condensation in the motor, let the motor cool down
before spraying it with cold water.
62

11. Technical data

11.1 Operating conditions

11.1.1 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.
11.1.2 Ambient temperature
Ambient temperature during storage and transportation
Minimum: -22 °F (-30 °C)
Maximum: 140 °F (60 °C).
Ambient temperature during operation
1 × 200-240 and 3 × 440-480
Minimum: -4 °F (-20 °C)
Maximum: 122 °F (50 °C).
3 × 200-240
Minimum: -4 °F (-20 °C)
Maximum: 104 °F (40 °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.
11.1.3 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 the figure below.
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
Derating of motor output power (P2) in relation to altitude above
sea level
[ft]