Mechanical Installation; Motor Cooling; Outdoor Installation; Electrical Connection - Grundfos E Serie Instrucciones De Instalación Y Funcionamiento

4. Mechanical installation

In order to retain the UL/cURus approval, follow the
Note
additional installation procedures on page 818.

4.1 Motor cooling

To ensure sufficient cooling of motor and electronics, observe the
following requirements:
• Make sure that sufficient cooling air is available.
• Keep the temperature of the cooling air below 40 °C.
• Keep cooling fins and fan blades clean.

4.2 Outdoor installation

When installed outdoors, the pump must be provided with a
suitable cover to avoid condensation on the electronic
components. See fig. 1.
Fig. 1 Examples of covers
Remove the drain plug pointing downwards in order to avoid
moisture and water build-up inside the motor.
Vertically mounted pumps are IP55 after removal of the drain
plug. Horizontally mounted pumps change enclosure class to
IP54.

5. Electrical connection

For description of how to connect E-pumps electrically, see the
following pages:
5.2 Electrical connection - single-phase
5.3 Electrical connection - three-phase pumps up to 7.5
8
5.4 Electrical connection - three-phase pumps, 11-22
10.

5.1 Cable requirements

5.1.1 Cable size
Single-phase supply
2
1.5 mm / 12-14 AWG.
Three-phase supply
2
6-10 mm / 10-8 AWG.
5.1.2 Conductors
Type
Stranded copper conductors only.
Temperature rating
Temperature rating for conductor insulation: 60 °C (140 °F).
Temperature rating for outer cable sheath: 75 °C (167 °F).
6
pumps, page 6
kW, page
kW, page

5.2 Electrical connection - single-phase pumps

Warning
The user or the installer is responsible for the
installation of correct earthing and protection
according to local regulations. All operations must be
carried out by qualified staff.
Warning
Never make any connections in the pump terminal
box unless all electric supply circuits have been
switched off for at least 5 minutes.
Note for instance that the signal relay may be
connected to an external supply which is still
connected when the mains supply is disconnected.
The above warning is indicated on the motor terminal
box by this yellow label.
Warning
The surface of the terminal box may be above 70 °C
when the pump is operating.
5.2.1 Preparation
Before connecting the E-pump to the mains, take the issues
illustrated in the figure below into consideration.
N
ELCB
L
PE
Fig. 2 Mains-connected pump with mains switch, backup
fuse, additional protection and protective earthing
5.2.2 Protection against electric shock - indirect contact
Warning
The pump must be earthed and protected against
indirect contact in accordance with local regulations.
Protective earth conductors must always have a yellow/green
(PE) or yellow/green/blue (PEN) colour marking.
5.2.3 Backup fuses
For recommended fuse sizes, see section
5.2.4 Additional protection
If the pump is connected to an electric installation where an earth
leakage circuit breaker (ELCB) is used as additional protection,
the circuit breaker must be of a type marked with the following
symbol:
The total leakage current of all the electrical equipment in the
installation must be taken into account.
The leakage current of the motor in normal operation can be seen
in section 19.3 Leakage current.
During start and at asymmetrical supply systems, the leakage
current can be higher than normal and may cause the ELCB to
trip.
N
PE
L
19.1 Supply voltage.
ELCB