Carrier 42NC, Инструкции по установке, эксплуатации и обслуживанию, Страница: 15 / 20

To open a connection point and change the cabling (fig.12c).
- Place the end of a flat-blade screwdriver in the hole located just
below the cable to be removed, release the cable and move it to
the marker for the desired speed.
- Place the screwdriver back in the hole just below the desired
speed, insert the cable and remove the screwdriver; this ensures
a secure contact.
Repeat the procedure for the remaining customer speeds.
WARNING: the wires coming from the motor and connected
to terminals V1 to V5 must never be interconnected.
WARNING : it is essential to refit the electrics box cover once all
the cabling and adjustment operations are complete.
● The brushless motor :
This has a motor speed electronic control unit which uses a 0-10
V control signal.
The 0-10V setpoint voltage information is issued by the controller
itself. Refer to the operating and configuration instructions
supplied by the manufacturer.
Warning : if electrical heaters are used, the lowest speed setting
should never be below 2 V.
To prevent any risk of damage, never connect several
asynchronous or brushless fan coil unit motors in parallel for the
same thermostat.
IMPORTANT NOTE: BRUSHLESS MOTOR
The electrical connection for the units must be made in
compliance with international standard IEC 60364 (Electrical
Installations for Buildings). The leakage current for all our units
complies with the requirements of standard IEC 60335-2-40
(Household and similar electrical appliances - Safety):
- Complete unit (with electrical heaters) equipped with a multi-
speed motor: maximum leakage current = 2 mA.
- Complete unit (with electrical heaters) equipped with an EC
motor
(Brushless technology): maximum leakage current = 4.5 mA.
Electromagnetic compatibility in accordance with Emission
standard 61000-6-3 EN 550141-1, tool class and Immunity
61000-6-1 (Residential, commercial and light industry class).
Important : the unit’s compliance with the above standards does
not guarantee the compliance of the installation as a whole
(several other factors not relating to the unit may be involved).
As a result, the installer must observe the applicable
recommendations in order to guarantee compliance.
Electrical safety:
To ensure user safety, earthing is compulsory.
The installation must be equipped with a device to protect
against earth faults.
A disconnect device must be built into the installation between
the supply and the 230 VAC power network, and must be easy to
access. The disconnect device must simultaneously disconnect
the two poles (live and neutral), and have a distance of at least
3 mm between the contacts, in compliance with the installation
instructions.
The mains power cable must have 3 conductors (blue, brown,
green/yellow) and its cross section and type must comply with
the specifications set out by the applicable EN or IEC standard.
Refer to the selection sheet or the name plate to determine the
maximum input current. The cable must be fed into the box via
the circular hole fitted with a protective grommet and secured in
the dedicated strain relief. Its maximal diameter must be 12 mm.
It must be clamped at low speed with a torque not exceeding
0.8 Nm.
Connection
Connect the electrical connections to the connectors as per the
wiring diagram below, and lock the wires using the special cable
grommets.
10 120
10 100
Max Ø 12
Power cable
IMPORTANT: Connect the earth before making any other
connections.
Check that the stripped section of the GREEN/YELLOW cable is
longer than the others.
The electrical connection cables must be type H05 VVF with
PVC insulation in accordance with the standard EN 60335-2-40.
The power cable must have a minimum cross section of 2.5
mm².
If the indoor unit is equipped with electric heating, there is just
one power supply; in this case, ensure that the power cable is
correctly sized.
General safety instructions for units with electric heating
elements:
l
Fan-controlled operation: the electrical heater (1 or 2
elements) must always be fan-controlled. Power to the electric
heating elements should be cut and post-ventilation activated
whenever the fan motor assembly is stopped intentionally or
unintentionally.
l
To ensure the hot water and electrical heaters work correctly
when used simultaneously, we recommend only low
temperature settings are used to ensure our safety devices
operate correctly.
l
Units equipped with heaters are protected against accidental
overheating by 2 temperature limiter thermostats (fig.12a);
these are always fitted on the electrics box side. Do not reset
these thermostats until the potential causes of the overheating
have been checked:
> Powering up without ventilation.
> Filter partially clogged.
> Coil and fan stopped simultaneously by control.
Warning: Never connect several fan coil unit motors in parallel
on the same thermostat.
9 - RACCORDEMENTS ELECTRIQUES
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