12
Vertical package air conditionners
12. M
AINTENANCE
Recommendations:
Next, some recommendations are stated to perform the cleaning of
the unit’s components:
Air coil
- Check that the coil is free from dust and grease.
- Cleaning the accumulated dust on the coil can be performed with
a vacuum cleaner perpendicular to the fi ns or with a low-pressure
water cleaner. Grease can be removed with water with degreaser.
Do not put stress on the fi ns as they could deform.
Air fi lters
Maintenance:
- Clean usually. Depending on the installation conditions, the fi lter
aspect must be examined to defi ne the cleaning periodicity.
- Gravimetric fi lters. Cleaning the fi ltering mesh can be done with a
household vacuum cleaner, or else by submerging it in water.
- Creased
opacimetric
fi lters It is necessary to replace them. Foresee
replacement.
Filters extraction:
- In fi rst place, put the door switch in 0 position.
- In these units, for maintenance operation the extraction of the fi lter
is lateral. Simply, it is carried out the unblocking of the stop-pieces
that fi t the fi lter and it is removed.
Dehydrant fi lter
- The
fi lter function is the preserve the cooling circuit clean and without
humidity, neutralizing the acids that can be found in the cooling circuit.
Verify dirt measuring the difference in temperature at the tubing level,
at the inlet and at the outlet of the dehydrant.
- If necessary, replace.
Oil
- Check the oil level and aspect. In case of a colour change, check
the oil quality using a contamination test.
- In the case of the presence of acid, water or metallic particles, replace
the affected circuit oil, as well as the dehydrant fi lter.
- In the event of an oil charge change, only new oil will be used, which
will be identical to the original oil and taken from a can tightly closed
until the moment of the charge.
Note:
Both the oil type as well as the volume needed for each model are
stated in the Technical characteristic tables in chapter 3.
Refrigerant
Qualifi ed personnel must perform a periodic control to air tightness
depending on the refrigerant charge, in accordance with the regulation
(EC) No. 842/2006.
It is important not to ever forget that the cooling systems contain liquids
and vapours under pressure.
- All necessary precautions must be taken during the partial opening
of the cooling circuit. This opening entails the discharge of a certain
amount of refrigerant to the atmosphere. It is essential to limit to its
minimum this amount of lost refrigerant by pumping and isolating the
charge in some other part of the circuit.
- The liquid refrigerant at low temperature can cause infl ammatory
injuries similar to burns when contacting the skin or eyes. Always
use protection glasses, gloves, etc. when opening ducts that may
contain liquids.
- The refrigerant in excess must be stored in appropriate containers
and the amount of refrigerant stored at the technical rooms must be
limited.
- Refrigerant barrels and deposits must be handled with precaution
and visible warning signs must be placed to attract attention over
the risks of intoxication, fi re and explosion linked to the refrigerant.
- At the end of its useful life, the refrigerant must be retrieved and
recycled as per the current regulations.
If the return is not ducted, all the set can be removed from the unit
unscrewing the two screws that fi x the panel to the unit and taking it out.
Unit access from all its gates.
V-220004
Caution: Before intervening in the unit, cut off main
power.
The minimal maintenance operations and their periodicity will be made
according to the national regulations.
Any intervention on the electric cooling components must be made by
a qualifi ed and authorized technician.
Summary of Contents for 50NF
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