Electrical Wirings; Electrical Data; Start-Up; Preliminary Operations - AERMEC NRC 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
physical positioning.

6. 1 ELECTRICAL DATA

Size 0275
(mm 2 )
25
Sect. A
(mm 2 )
1,5
Sect. B
(mm 2 )
Sect. 16
PE
(A) 80
IL
KEY
Sect. A = Line
Sect. B = Remote safety
Sect. PE = Earth commands
IL = Main switch

7. 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.

7. 1 . 1 ELECTRICAL CHECKS

- 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.

ELECTRICAL WIRINGS

6
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
correctly secured to the terminals
when switched on for the first time and
0300 0325 0350 0500
25 35 35 50
1,5 1,5 1,5 1,5
16 16 16 25
80 100 100 125

START-UP

7
- Power up the unit by turning the main
switch to the ON position. The display
will light up a few seconds after this.
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.
- The heater(s) must work for at least 24
hours before the compressor start-up,
and in any case the temperature of the
oil bowl must be 10-15°C higher than
the room temperature.
WARNING
At least 24 hours before starting up
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.
0550 0600 0650 0700
50 70 70 95
1,5 1,5 1,5 1,5
25 35 35 50
125 200 200 200
the unit (or at the end of each period of
prolonged inactivity) the unit must be
powered up, to allow the heaters of the
compressor carter to evaporate any
refrigerant that may be present in the
oil. If this precaution is not performed the
compressor could be seriously damaged
and the guarantee would no longer be
valid.

7. 1 .2 HYDRAULIC CIRCUIT CHECKS

- Check that all the hydraulic connections
- Check that the hydraulic system is full
- Check that any interception valves on
- Check that the circulation pump(s) are
- Check the water flow rate, measuring
0750 0800 0900
95 120 150
1,5 1,5 1,5
50 70 70
250 250 315
are correctly made and that the
indications on the plates are observed.
and under pressure, and check also
that there is no air (if there is air, bleed
it).
the system are correctly opened.
working, and that the water flow rate
is sufficient to close the flow switch
contact.
1000
150
1,5
95
315
19