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10 - RESIDUAL RISKS
Generality
The most common situations, as they cannot be controlled by the
manufacturer, that may give rise to risk situations for things or persons
are found in this section.
Dangerous area
It is the area in which only an authorised operator can act. The
dangerous area is the area inside the unit, accessible only via removal of
the cowling or parts of it.
Handling
The handling operations, if carried out without all the necessary safety
devices and without the due caution, can cause the falling or overturning
of the unit with consequent damages, even serious, to things, persons
and the unit itself.
Handle the unit following the instructions on the packaging, in this
manual and according to the local standards in force.
In case of coolant gas leak, refer to the coolant "Safety sheet".
Installation
An incorrect installation of the unit can cause water leaks, condense
storage coolant leaks, electric shocks, fires, malfunctioning or damages
to the unit itself.
Check installation is carried out only by qualified technical personnel and
that the instructions in this manual and the local standards in force are
complied with.
The unit installation in a place where, even occasionally, the flammable
gas leaks and consequent storage of these gases in the area around the
unit itself, can cause explosions and fires.
Installation of the unit in an unsuitable place to support the weight and/or
guarantee an adequate anchoring, can cause the falling and/or
overturning, with consequent damages to things, persons or the unit
itself.
Carefully check positioning and anchoring of the unit.
The easy access to the unit by children, unauthorised persons or
animals, may give rise to accidents and injuries, even serious.
Install the unit in places accessible only by authorised personnel and/or
foresee protections against intrusions in the dangerous area.
General risks
Burnt odour, smoke or other signs of serious anomalies may show the
arising of situations that can cause damages to things, persons or the
unit itself.
Electrically isolate the unit (yellow-red isolator).
Contact the after-sales authorised assistance centre to identify and
resolve the problem at origin of the anomaly.
The accidental contact with exchange coils, compressors, supply piping
or other components can cause injuries and/or burns.
Always wear adequate clothing that includes protective gloves for
operations inside the dangerous area.
Maintenance and repair operations carried out by unqualified personnel
can cause damages to things, persons or the unit itself.
Always contact a qualified after-sales assistance centre.
The lack in closing the unit panels, or lack in checking the correct
fastening of all fastening screws of the panelling, can cause damages to
things, persons or the unit itself.
Periodically check closing of all panels and their correct fastening.
In the event of fire, the coolant temperature can reach values such to
bring the pressure over the safety value, with consequent possible
projection of coolant or explosions of the circuit that remain isolated from
closure of the cocks.
Do not stand near the safety valve and never leave the cooling system
cocks closed.
Electrical part
An incomplete connection line to the electric mains and/or with
incorrectly dimensioned cables, and/or with inadequate protective
equipment, can cause electric shocks, intoxication, damages to the unit
or fires.
Carry out all work on the electric system with reference to the wiring
diagram and this manual, assuring use of a dedicated system.
An incorrect fastening of the lid of the electric components can favour
entry of dust, water, etc. inside and consequently cause electric shocks,
damages to the unit or fires.
Always securely fasten the lid to the unit.
The metal masses of the unit, when powered and not correctly
connected to the earth system, can cause electric shocks or death for
electrocution.
Carefully execute connection to the earth system.
Contact with the accessible powered parts inside the unit after the
removal of guards can cause electric shocks, burns or death for
electrocution.
Open and padlock the main isolator before removing the guards and
signal the works in progress with relative sign.
Contact with parts that may power due to unit start-up, can cause electric
shocks, burns or death for electrocution.
When not necessary.
Moving parts
Contact with the transmissions or suction of the fans can cause injuries.
Before accessing inside the unit, open the isolator on the unit connection
line, padlock it and expose appropriate sign.
Contact with the fans can cause injuries.
Before removing the protective grilles or fans, open the isolator on the
unit connection line, padlock it and expose relative sign.
Coolant
The intervention of the safety valves and the consequent coolant gas
expulsion can cause injuries and intoxication. Always wear adequate
clothing and protective goggles for operations inside the dangerous area.
In case of coolant gas leak, refer to the coolant "Safety sheet".
Contact between naked flames or sources of heat with coolant, or the
heating of the pressurised gas circuit (e.g. during welding), can cause
explosions or fires.
Do not place any source of heat inside the dangerous area.
The maintenance or repair interventions requiring welding must be done
with system drained.
Hydraulic part
Defects in the piping, in the connections or in the shut-off parts, can
cause water leaks or projections, with consequent damages to things or
short circuits of the unit.
