Grundfos CRE User Manual

5. Position the plastic cover correctly on the four rubber pins (C).
Make sure that the locking tabs (A) are placed correctly.
A
A
C
TM055355
Positioning the plastic cover
6. Fit the terminal box cover, and make sure that it is also turned
180° so that the buttons on the operating panel are aligned with
the buttons on the plastic cover.
7. Tighten the four screws (TX25) with 5 Nm.
TM055356
Fitting the terminal box cover
6. Electrical installation
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 you make
any connections in the terminal box. Make sure that
the power supply cannot be accidentally switched on.
DANGER
Electric shock
Death or serious personal injury
‐ Check that the supply voltage and frequency
correspond to the values stated on the nameplate.
If the power supply cable is damaged, it must be replaced by the
manufacturer, the manufacturer's service partner or a similarly
qualified person.
The user or the installer is responsible for the installation of correct
grounding and protection according to local regulations. All
operations must be carried out by a qualified electrician.
6.1 Protection against electric shock, indirect contact
WARNING
Electric shock
‐ Death or serious personal injury
‐ Connect the motor to a protective ground and provide
protection against indirect contact in accordance with
local regulations.
Protective-ground conductors must always have a yellow/green
(PE) or yellow/green/blue (PEN) color marking.
Protection against power supply voltage transients
The motor is protected against power supply voltage transients in
accordance with EN 61800-3.
Motor protection
The motor requires no external motor protection. The motor
incorporates thermal protection against slow overloading and
blocking.
6.2 Cable requirements
Cable cross-section
DANGER
Electric shock
Death or serious personal injury
‐ Always comply with local regulations as to cable
cross-sections.
Single-phase supply
Conductor type
Conductor material
Cross section
[mm
2
]
[AWG]
Solid
Copper
0.5 - 2.5 28-12
Stranded 0.5 - 2.5 30-12
Three-phase supply
Conductor type
Conductor material
Cross section
[mm
2
]
[AWG]
Solid
Copper
0.5 - 10 18-8
Stranded 0.5 - 10 18-8
13
English (US)

Grundfos CRE Specifications

General

Protection Class	IP55
Material	Stainless Steel
Applications	Water supply, pressure boosting, irrigation
Impeller Material	Stainless Steel
Pump Housing Material	Stainless Steel
Connection Size	DN32 to DN200 (depending on model)
Power Supply	3-phase
Control	Integrated frequency converter