Installation & Connection; Mechanical Connections; Air Connections - Carrier 42KY serie Bedienungsanleitung

4. INSTALLATION & CONNECTION
To protect against injury or damage to the unit or room, the hydraulic connections must be made by qualified
personnel only.

4.1. Mechanical connections

Ensure there are no obstructions which could prevent optimal air distribution.
A protective film applied to the air intake prevents dust from entering the unit during assembly and can be left in place until the
diffuser is fitted in its final position.
The air treatment box is placed inside the false ceiling, on the edge of the room, blowing facing the glazing and if possible an
electric box directed towards the inside of the building (Fig. 4, a). If necessary the diffuser can be oriented in different positions.
Ensure that the adjacent suspended ceiling panels can be easily removed to allow maintenance and servicing operations to be
carried out. To facilitate positioning of the unit, we recommend that you remove one of the ceiling support profiles. The unit must
be suspended from the ceiling using 4 threaded rods either 6 mm or 8 mm in diameter (not supplied), which are fixed to the unit's
4 support brackets using anti-vibration resilient mounts (optional, Fig. 3, a) or a nut/washer assembly positioned on either side
of the mounting bracket (Fig. 3, b). The unit can also be suspended using steel cables (not supplied) equipped with end-pieces
adapted to the support brackets.
If using a 24mm ceiling support profile, the cassette will just touch the edge of the support.
Note: To enable access to the auxiliary condensate drain pan and to the electrical and hydraulic connections, a trapdoor must
be provided or access must be possible via adjacent panels in the suspended ceiling.
We strongly recommend the use of anti-vibration resilient mounts when securing the unit, in order to reduce the transmission of
vibrations through the building structure during operation.
The fitting template found in the unit packaging is used to trace the anchoring points for the threaded rods onto the ceiling.
Insert the threaded rods in the notches on the support brackets.
The unit must be level and rest gently on the base of the T profiles in the suspended ceiling (Fig. 3, c) or between the profiles
depending on the type of fitting (15 mm T with 8 mm shadowgap) (Fig. 3, d).
Caution:
- Check that the fan rotates freely and that there is no friction. If necessary, readjust the plastic inlet (Fig. 9, a) fitted to
the air intake under the main pan, by gently loosening the 3 mounting bolts (Fig. 9, b). This check must be performed
each time the main condensate drain pan is disassembled and before the unit is switched back on.
- The unit must be perfectly level in relation to the suspended ceiling to prevent condensate drainage problems.
- The rear of the device must be at a sufficient distance from the wall (600 mm recommended, min. 300 mm) to enable
access to the hydraulic, electrical and air connections. Reminder: the air discharge is always directed towards glass
windows in order to minimise heat flow due to radiation.
- If a room thermostat is fitted, place it on an inside wall (not behind a door) and at a height of 1.50 m from the floor.
Keep it away from sunlight and all sources of heat.

4.2. Air connections

 Air quality
Comfort units are not designed to control the humidity of outside air. Fresh air should be treated by an independent system in
accordance with industry standards.
 Mounting the supply / return grille:
We recommend fitting this component only when the unit body is already installed in the suspended ceiling to prevent damage
to the panel or clogging of the filter during tests when switching on for the first time.
- Remove the protective film applied to the air intake on the unit.
- Open and remove the intake grille (Fig. 5, a).
- Fit the panel (Fig. 5, b). Warning: for improved efficiency, direct the Visual 180° difffuser towards the glass walls.
- Rotate the 4 clips to hold the diffuser in position (Fig. 5, c).
- Tighten the 4 bolts (Fig. 5, d).
- Refit and close the intake grille.
Attention: do not press hard on the corners of the panel as this could deform them. Check that the panel is securely affixed.
The unit has an integrated supply / return air path which isolates the airflow through the unit from the ceiling void. The use of a
connecting air duct between the air return and discharge is therefore not necessary.
The unit has an inlet for clean fresh air equipped with a 100 mm diameter connection sleeve integrated in the frame, with a
removable plug (Fig. 6, a). Recommended max. fresh air flow 90 m 3 /h.
When using the unit with fresh air, as a filtration cassette according to standard VDI 6022, the air handling unit must fulfil the
criteria for this standard and must be equipped with an F7 filter as a minimum.
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