page 18
ROUTINE MAINTENANCE
BEFORE UNDERTAKING ANY SORT OF MAINTENANCE OR CLEANING, DISCONNECT THE ELECTRICAL
POWER SUPPLY TO THE UNIT, AND ENSURE THAT OTHER PEOPLE CANNOT RE-CONNECT IT .
All equipment is subjected to wear out.
The maintenance makes :
1. keeps the unit efficiency
2. the components last longer
3. keeps their efficiency and limits breakdowns
Therefore, it is fundamental to perform periodical checks:
a few controls can be performed by the user
(AUTONOMOUS MAINTENANCE) and they are mainly
cleaning activities; otherwise, controls have to be
performed by specialized technicians (INSPECTIONS).
The machine should have a log book used to keep track
of the performed controls. This will make fixing up
breakdowns easier.
Take note of the date, type of control (autonomous
maintenance, inspection or fixing up), description of the
control, actions taken and so on.
SERVICES : parts subject to intervention
AIR FILTERS
CONDENSATE DISCHARGE
ROOM AIR TREATMENT COIL
STRUCTURE
EXTERNAL FANS
DUCTING
AIR FILTERS
It is very important for the air treatment coil to be able to
offer maximum thermal exchange. Therefore, the unit must
always operate with the filters installed and clean.
Cleaning and replacement of filters are very important in
terms of health and hygiene.
Operation with clogged filters leads to a reduction in the air
flow rate, resulting in malfunctions and unit shutdowns. It
may even cause the unit to break down.
How often the filters need to be checked depends on the
quality of outdoor air, unit operating hours, dust and number
of persons in the rooms.
As a guideline, cleaning should ideally take place between
weekly and monthly. It is advisable to start with frequent
checks, and to adjust the frequency based on how much dirt
is discovered.
PLEATED FILTERS
1. Remove the closing doors
2. Carefully extract the filter so that no dust reaches the
parts below
3. Wash the filtering mattress in warm water with a
common detergent.
4. Carefully rinse it under water while preventing to pour
water in the room
5. Dry the filter
6. Reinsert it to its seat
7. Reassemble the closing doors
Old filters, washing residuals and residual parts must be
disposed of, according to the law in force.
ROOM AIR TREATMENT COIL
ATTENTION: accidental contact with the fins of the
exchanger may cause small cuts. When performing the
following steps, use protective gloves.
The finned surfaces of the cooling coils and especially the
condensation collection trays are the places where micro-
organisms and moulds most easily flourish. It is therefore
very important to clean regularly with suitable detergents
and disinfect with appropriate products as necessary.
STRUCTURE
Check the condition of the parts making up the structure.
Paint so as to eliminate or reduce oxidation at the points in
the unit where this problem may occur. Check that the
panelling is fastened correctly. Poor fastening may give
rise to malfunctions and abnormal noise and vibration.
DUCTING
Check the fixing screws and the operation of the anti-vibration devices in order to prevent the transmission of vibrations in the
room.
ELECTRIC FANS
Make sure that the fans and the relative protection grids are well fixed.
Check, if possible, the unbalances of the electro-fan evident by noise and anomalous vibrations. Verify that the terminal
protection covers are closed and the cable holders are properly positioned.
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