Maintenance and cleaning
N.B.
All operations described in this chapter MUST ALWAYS BE PERFORMED BY QUALIFIED PERSONNEL.
Before carrying out any operations on the unit or accessing internal parts, make sure you have disconnected the power
supply. The compressor heads and outlet pipe are usually at high temperature. Take special care when working in the
vicinity of the coils. The aluminium fins are particularly sharp and can cause serious injuries. On completion of maintenance
operations, close the panels and secure them with the fixing screws.
Periodic checks
Every 6 months
It is good practice to conduct periodic checks to ensure that the unit is working properly.
Check that the control and safety components are working properly.
Check that the electrical terminals both in the electrical panel and on the compressor terminal boards are firmly fixed.
Periodically clean the mobile and fixed contacts of the remote contactors.
Make sure that there are no leaks in the in the water circuit.
Check that the flow switch works properly, and clean the metal filter installed on the water pipe.
Check that power is supplied to the guard heaters and that they work properly (once a month).
Inspect the finned coil, and if necessary clean with compressed air in the opposite direction to the airflow. If the coil is
completely clogged, clean it with a low-pressure cleaner, taking care not to damage the aluminium fins.
Check that the fans are properly fixed and balanced.
End of season or unit shutdown
If you intend to shut the unit down for a long period, the water circuit must be emptied so that there is no water left in the
pipes or exchanger. This operation is obligatory if, during seasonal shutdown, you expect the room temperature to fall below
the freezing point of the mixture used (typical seasonal operation).
Cleaning the filters
To remove the filters you need to undo the screws
securing the filter bracket as shown in fig.43.
After undoing the screws you can remove the filters as
in fig.44.
N.B.
The filter material can be reused after blow-cleaning or
vacuum-cleaning it. Because of the high efficiency of
the system, however, the filter material cannot be
regenerated more than three or four times, after which
the filter must be replaced.
49
ENGLISH
Viti staffetta blocca filtro
43
43
44
44
Filter bracket screws
