Hardware Installation; Mounting And Dimensions; Installation - Carel kVent Manual

2.1 Mounting and dimensions

The controller is designed to be mounted on a DIN rail. The figure
below shows the dimensions.

2.2 Installation

2.2.1 Environmental conditions
Avoid installing the controller and the terminal in places with:
•
exposure to direct sunlight and to the elements in general;
•
temperature and humidity outside the product's range of
operation (see "Technical Specifications");
•
large, rapid fluctuations in room temperature;
•
strong magnetic and/or radio frequency interference (avoid
installing near transmitting antennas);
•
strong vibrations or knocks;
•
presence of explosives or flammable gas mixtures;
•
exposure to aggressive and polluting atmospheres (e.g.
sulphur and ammonia vapours, salt mist, fumes) that can
cause corrosion and/or oxidation;
•
exposure to dust (formation of a corrosive patina with
possible
•
oxidation and reduced insulation);
•
exposure to water.
2.2.2 Positioning the controller inside the panel
Install the controller inside an electrical panel in a position where it
cannot be reached and is protected from knocks or impacts. The
controller should be placed inside the panel in a position where it is
physically separated from
contactors, actuators, inverters, etc.) and their respective cables.
The ideal solution is to house these two circuits in two separate
cabinets. Proximity to such devices/cables may cause random
malfunctions that are not immediately evident. The panel's casing
must allow an adequate flow of cooling air.
Attention:
•
For safety reasons the controller should be installed inside an
electrical panel so that the only accessible parts are the
display and the built-in terminal's keypad.
•
Install the controller so that the disconnection devices can be
used safely and without hindrance.
•
When laying out the wiring, separate as much as possible the
probe cables, digital input cables and serial line cables from
kVent – rel 3.1 – 22/06/2018
2.

HARDWARE INSTALLATION

power components (solenoids,
the power cables (connected to contactors, thermomagnetic
devices, etc.) avoid electromagnetic interference.
•
Never run power cables and probe signal cables in the same
conduits (including the ones in the electrical panels).
•
For control signals, use shielded cables with twisted wires. If
the control cables have to cross over power cables, the
intersections should be as close as possible to 90 degrees;
under no circumstances should the control cables be laid
parallel to the power cables.
•
Keep the paths of the probe cables as short as possible and
avoid making spiral paths that enclose power devices.
•
In case of malfunctions do not attempt to repair the device,
but contact a CAREL service centre.
2.2.3 Electrical installation
Attention: Before servicing the equipment in any way
disconnect the controller from the power mains by putting the
system's main switch on OFF.
Make sure the system is provided with a power disconnector
conforming to regulations. Use cable lugs that are suitable for the
terminals used.
Loosen each screw and insert the cable lugs, then tighten the
screws.
There is no limit to the number of wires that can be connected to
each individual terminal. When tightening the terminal screws
apply a tightening torque no greater than 0.6 Nm. For information
on the maximum allowable length of the connections to the
analogue/digital inputs and to the analogue outputs please refer to
the "Technical Specifications" table. In environments subject to
strong disturbance use shielded cables with the braiding bonded to
the earthing conductor in the electrical panel. The terminals can
accept wires with a maximum cross-section of 2.5 mm2 (12 AWG).
After making the connection, gently tug on the cables to make sure
they are sufficiently tight.
Note:
•
secure the cables connected to the controller with clamps
placed at 3cm from the connectors;
•
if the power transformer's secondary winding is earthed,
make sure the earth conductor is bonded to the conductor
that goes to the controller and is connected to terminal G0.
This applies to all the devices connected to the controller
through a serial network.
Attention:
•
Using a supply voltage other than specified can seriously
damage the system.
•
Installing, servicing and inspecting the controller should be
done only be qualified personnel and in compliance with
national and local regulations.
•
All the very low voltage connections (24 Vac/Vdc or 28 to 36
Vdc
•
analogue and digital inputs, analogue outputs, serial bus
connections, power supplies) must have reinforced or double
insulation from the power mains.
•
Avoid touching or nearly touching the electronic components
mounted on the boards to avoid electrostatic discharges from
the
•
operator to the components, which can be very damaging.
•
Do not press the screwdriver on the connectors with
excessive force, to avoid damaging the controller.
•
Using the device in any way other than specifi ed by the
Manufacturer can compromise its protection system.
•
Use only optional boards and connectors supplied by CAREL.
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