Grundfos TPE 2000 Series, Инструкция по установке и эксплуатации

Страница: 6 / 880

English (GB)
6
4. Mechanical installation
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 Example of cover
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 pumps on page 6
5.3 Electrical connection - three-phase pumps up to 7.5 kW on
page 9
5.4 Electrical connection - three-phase pumps, 11-22 kW on page
11 .
5.1 Cable requirements
5.1.1 Cable size
Single-phase supply
1.5 mm
2
/ 12-14 AWG.
Three-phase supply
6-10 mm
2
/ 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).
5.2 Electrical connection - single-phase pumps
5.2.1 Preparation
Before connecting the E-pump to the mains, take the issues
illustrated in the figure below into consideration.
Fig. 2 Mains-connected pump with mains switch, backup
fuse, additional protection and protective earthing
5.2.2 Protection against electric shock - indirect contact
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 20.1 Supply voltage .
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
20.3 Leakage current .
During start and at asymmetrical supply systems, the leakage
current can be higher than normal and may cause the ELCB to
trip.
Note
In order to retain the UL/cURus approval, follow the
additional installation procedures on page
876 .
T
M
02
85
14
03
04
Warning
The user or the installer is responsible for the
installation of correct earthing and protection
according to local standards. 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.
TM
02
07
92
01
01
Warning
The pump must be earthed and protected against
indirect contact in accordance with local regulations.
N
PE
L
N
L
PE
ELCB
ELCB