10.
Safety instructions - R32
Area checks
Before working on systems containing flammable refrig
-
erants, perform safety checks to reduce the risk of com
-
bustion to the minimum. Before performing
any reparation operations on the cooling system, comply
with the following warnings.
Work procedures
Operations must be performed following a controlled pro
-
cedure so as to reduce the risk of flammable gases or
vapours developing.
General work area
All the personnel in charge with maintenance
operations and other operators working in the local area
must be instructed and monitored as regards the nature
of the intervention.
Avoid working in tight spaces. The area surrounding the
working space must be cordoned off. Make sure the area
is secured by monitoring the flammable material.
Checking for the presence of refrigerant
Both before and during operations, the area must be
monitored with a dedicated refrigerant detector to make
sure the technician is aware of the presence of potential
-
ly-flammable environments.
Make sure the leak detection equipment is suitable for
use with flammable refrigerants and therefore without
sparks, suitably sealed or intrinsically safe.
Presence of the f ire extinguisher
If hot interventions are not performed on cooling equip
-
ment or connected components, suitable fire fighting
equipment must be kept at hand.
Keep a dry-powder or CO
2
extinguisher near the loading
area.
No ignition source
It is absolutely forbidden to use ignition sources that may
lead to fire or explosion during operations on the cooling
system or on pipes that contain or have contained flam
-
mable refrigerant.
All possible ignition sources, including cigarettes, must
be kept sufficiently away from the installation, reparation,
removal and disposal site as flammable refrigerant may
be released in the surrounding area.
Before starting operations, the area surrounding the
equipment must be inspected to guarantee the
absence of flammables or combustion risks. “SMOKING
IS FORBIDDEN” signs must be affixed.
Ventilated area
Before intervening on the system or performing any hot
intervention, make sure to be in an outdoor or suitably
ventilated area.
Ventilation must be maintained during operations.
Ventilation must disperse the released refrigerant safely,
preferably outdoors in the atmosphere.
Cooling equipment checks
Should a replacement be necessary, the new compo
-
nents installed must be suitable for the
purpose envisaged and compliant with specifications.
Always follow the manufacturer guidelines on mainte
-
nance and assistance. In case of doubt, contact the man
-
ufacturer technical office for assistance.
The following checks must be preformed on systems con
-
taining flammable refrigerants:
•
the quantity of the charge must comply with the size
of the room where the parts containing refrigerant are
installed;
•
the machine and ventilation intake function correctly
and are not obstructed;
•
If an indirect cooling circuit is used, the secondary cir
-
cuits must be checked to verify the presence of refrig
-
erants; the marking on the equipment remains visible
and readable;
•
Make sure markings and symbols are always readable;
cooling pipes or components must be
•
installed in a position that makes improbable their expo
-
sure to substances that may corrode the components
containing refrigerant, unless they are manufactured
with material intrinsically resistant to corrosion or suita
-
bly protected against corrosion.
Electrical device checks
The reparation and maintenance of electric components
must include initial safety checks and component inspec
-
tion procedures.
In case of a fault that compromises safety, do not perform
any electrical connection to the circuit until said fault is
suitably resolved.
If it is not possible to repair the fault immediately and
electrical components need to remain functioning, a tem
-
porary solution must be adopted. This must be reported
to the owner of the equipment so as to keep all parties
informed.
Initial safety checks must include:
•
that condensers are emptied. This operation must be
performed safely to avoid any sparks:
•
that electrical components and wiring are not exposed
during the charging, recovering or venting phases;
•
That the earth conductor is continuous.
45
4 221 546 / 00
SafETy InSTRUCTIonS - R32
