Electrical Data; Preliminary Operations; Electrical Checks; Electrical Wirings - AERMEC NRA H Serie Manual Instalación

The unit is fully wired in the factory
and, for the start-up, requires a power
supply as shown in the indications
on the unit's rating plate, with online
protective cut-outs.
The cable cross sections and the
dimensions of the line main switch are
purely indicative.
The installer will be responsible for
properly scaling the power line with
regards to the length and type of cable,
the input power of the unit and the
5. 1

ELECTRICAL DATA

Number
NRA BASE power
supplies
0800
0900
1000
1250
1400
1500
1650
1800
Number
NRA BASE power
supplies
0800
0900
1000
1250 1400
1500
1650
1800
6. 1

PRELIMINARY OPERATIONS

WARNING
Before carrying out the controls
indicated below, ensure that the
unit is disconnected from the mains
supply. Ensure that the main switch
is turned to OFF and locked in position,
and attach a warning sign to the switch.
Before beginning the operations, check
the absence of voltage by means of a
voltmeter or a phase detector.
6. 1 . 1

Electrical checks

16
5
physical positioning.
All the electrical connections must
comply with the regulations in force at
the time of the installation.
The layouts given in this documentation
must only be used as an aid for the
setting up of the electrical lines. For
installation requirements, refer to the
wiring layout supplied with the device.
Note:
Check that all power cables are
Version
1 00
1 00
1 00
1 00
1 00
1 00
1 00
1 00
Version
1 P1-P2-P3-P4
1 P1-P2-P3-P4
1 P1-P2-P3-P4
1 P1-P2-P3-P4 1 P1-P2-P3-P4
1 P1-P2-P3-P4
1
P1-P2-P3-P4
1
P1-P2-P3-P4
6
- Check the general power supply
cables are of a suitable section, able to
withstand the overall absorption of the
unit (see electrical data), and that the
unit has been duly earthed.
- Check all the electrical connections
are correctly fixed and all the terminals
adequately closed.
The following operations must be carried
out when the unit is powered up.
- Power up the unit by turning the main
switch to the ON position. The display
will light up a few seconds after this.

ELECTRICAL WIRINGS

SECT. A Earth
mm 2 mm 2
(no. conductors - sect.) for each phase
70 35
95 50
95 50
120 70
120 70
185 95
2x150 1x150
2x150 1x150
SECT. A Earth
mm 2 mm 2
(no. conductors - sect.) for each phase
70 35
95 50
95 50
120 70 120 70
185 95
2x185 1x150
2x185 1x150

START-UP

correctly secured to the terminals
when switched on for the first time and
after 30 days of use.
Afterwards, check the connection of
the power cables every six months.
Slack terminals could cause the cables
and components to overheat.
Cross section recommended for the
maximum length of 50m. The cross
section of the cable and the dimensions
of the line main switch are purely
indicative.
KEY
IL
Sect. A
Power supply
A
Earth Earth to bring to the
machine
IL Main switch
200 A
250 A
250 A
315 A
315 A
350 A
400 A
400 A
IL
A
200 A
250 A
250 A
315 A 315 A
350 A
400 A
400 A
Check that the working status is
positioned on OFF (OFF BY KEYB on the
lower side of the display).
- Use a tester to check that the value of
the supply voltage at the RST phases
is equal to 400V ±10%, and also
check that the imbalance between the
phases is not greater than 3%.
- Check that the connections made by
the installer comply with the data given
here.
- Check the heater(s) of the compressor
carter are working by measuring the
increase in temperature of the oil bowl.