Servicing And Maintenance; Air Filter; Condensate Drain Pans - Carrier IdroFan 42KY Installation, Operation And Maintenance Instructions

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 power connection cables must be type H05 VVF with PVC insulation in accordance with standard EN 60335-2-40.
- The power cable must have a minimum cross section of 1.5 mm².
- Make sure the mains power supply goes through a circuit breaker which can cut power to all the poles.
- The earthing system must be TN or TT.
- Use short circuit protection devices (circuit breaker or fuses) and magnetic switches that conform to the applicable EN or IEC
standard.
General safety instructions for units with electrical heaters:
- The rotation speed of the EC motor must never be below 400 rpm.
- The operation of the heating coil must be fan-controlled.
- Power to the electrical heaters should be cut whenever the fan motor assembly is stopped intentionally or unintentionally.
- When the system is completely shut down, ensure that the controls provide at least 2 minutes over-run of the fan to dissipate
any residual heat in the electric heater.
- Units equipped with heaters are protected against accidental overheating by 2 temperature limiting thermostats (Fig. 15), one
with manual reset (a) and one with automatic reset (b).
Do not reset these thermostats until the potential causes of the overheating have been checked:
• Fan failure.
• Filter partially clogged
• Coil and fan stopped simultaneously by the control.

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:

Our device is equipped with a G3 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.
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).
Using a different type of filtration system could compromise the performance of the unit and be detrimental to users.
The above recommendations are for information only.
● 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.
EN - 10