Servicing And Maintenance; Air Filter; Condensate Drain Pans; Fan Motor Assembly - Carrier 42KY serie Bedienungsanleitung

5. SERVICING AND MAINTENANCE

The unit must be serviced periodically between the heating and cooling seasons. In particular, components prone to clogging
(filter, condensate drain pan, coil, etc.) must be checked.
Disconnect the electrical supply to the unit before carrying out any work. The unit must also be isolated from the hydraulic
circuit(s).

5.1. Air filter:

The filter is crucial to the correct operation of the unit. Without it the heat exchange coil would become clogged, the performance
drop and the unit's sound level rise.
Our device is equipped with a G3 filter.
We recommend regular visual inspection of the filter in order to define the frequency with which it should be replaced, which
varies depending on the premises and the operating conditions (replace at least once a year). If maintenance is carried out more
frequently, the filter can be cleaned with a vacuum cleaner (vacuum in the opposite direction to the normal airflow). The above
recommendations are for information only.
Using a different type of filtration system could compromise the performance of the unit and be detrimental to users.
 Accessing the filter:
- Identify the two retaining lugs (Fig. 16, a) positioned on the perforated return air grille
- Push the two lugs to release the return air grille.
- Lower the hinge-mounted return air grille until it is at right angles to the diffuser.
- Release the filter from its housing.
- After fitting a new filter, refit the return air grille. Lock it to the panel by simultaneously pushing the two lugs sharply upwards.
- Check that the grille is securely affixed.
Note: the micro perforated return air grille must never be pushed in beyond the discharge panel

5.2. Condensate drain pans

The main and auxiliary condensate drain pans must be kept clean. The pans and drainage fittings may be completely cleaned
using non-abrasive, water-based detergents. Also check periodically that the drain pipe is not blocked.
 Removing the pans:
- To remove the auxiliary pan:
- Unscrew the bolt under the pan (Fig. 17, b).
- Then unclip it from its location.
- Refit the bolt on the cassette (Fig. 17, a).
- To remove the main pan.
- Open and remove the intake grille on the diffuser (Fig. 18, a).
- Loosen the 4 bolts (Fig. 18, d).
- Pivot the 4 bolts holding the diffuser in position (Fig. 18, c).
- Remove the panel (Fig. 18, d).
- Remove the 4 brackets (8 bolts) (Fig. 18, e)
- Swivel the pan (approximately 30°) downwards (Fig. 18, f) and release it from its retaining lugs. (Fig. 18, g)
To refit, perform the operation in reverse order.

5.3. Fan motor assembly

From time to time, check that the fan-blades and the motor are clean. If necessary, clean them using a vacuum cleaner, taking
care to ensure they are not damaged.
The electric motor's bearings are lubricated for life and do not require specific maintenance.
 Removing the fan motor assembly:
- Open the electrical box
- Disconnect the wires in the fan motor wiring loom from the terminal strip.
- Follow the same procedure as for disassembling the main pan (Fig. 18) (see section 5.2 Condensate drain pans)
- Use a screwdriver to undo the screw securing the fan wheel and its foolproofing device (Fig. 19), and remove the fan wheel.
- Remove the grommet cap (Fig. 20, a)
- Pull the fan motor assembly wiring loom towards the interior of the casing
- Undo the 3 motor retaining screws and remove the motor (Fig. 20, b).
To refit, perform the operation in reverse order.
EN - 8