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Foresee inspection assistance carried out by authorized
centers or by qualified personnel.
The inspections should be carried out at least:
- Every year for only the cooling units
- Every six months for the cooling and warming
units
The frequency, however, depends on the use: in the event
of frequent use (continuous or very intermittent use, near
the operating limits, etc) or critical use (service necessary)
it is recommended to plan inspections at close intervals.
For units equipped with safety valves, follow the
Manufacturer’s instructions.
Verify periodically the cleaning of the safety valves and
that oxidative / corrosive phenomena are not present, in
particular for installations near the sea, in industrial areas
or in rooms with a corrosive atmosphere.
The inspections to be performed are as follows:
verify the power supply tension (when emptied or filled)
inspect the electrical board (status of solenoid starter
contacts, terminal closings, the status of wiring and
relevant insulations)
inspect the absorption of the single electrical loads
verify the cleaning and the efficiency of the exchangers
inspect the cleaning of the filters (air/water)
verify the leakage from the refrigerating circuit
Verify the protection devices (safety valves, pressure
switches, thermostats, etc.), the adjustment systems,
the control devices (alarm signalizations, probes,
manometers, etc)
check the operating parameters of the refrigerating
circuit (see the following REFRIGERANT TABLES and
the START-UP section)
97/23 CE PED DIRECTIVE gives instructions for
installers, users and maintenance technicians as well.
Refer to local actuation norms.
In Italy, refer to the Ministerial Decree of 1
st
December
2004 no. 329 (and following modifications) which defines
the performances to be executed; the units of 1
st
category
and those defined by the art. 3.3 97/23/EC are not
included in this regulation (see the serial number plate on
the unit) .
Briefly and as an example, see the following :
1. COMPULSORY VERIFICATION OF THE FIRST
INSTALLATION only for units assembled on the
installer’s building site (for ex. Condensing circuit +
direct expansion unit)
2. CERTIFICATION OF SETTING IN SERVICE for all
the units
1. PERIODICAL VERIFICATIONS to be executed with
the frequency indicated by the Manufacturer (see the
MAINTENANCE INSPECTIONS paragraph)
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