© STULZ S.p.A. – all rights reserved IT/10.2021/i04
WLA CompACT - TRANSLATIoN oF oRIGINAL INSTRUCTIoNS
3. Residual risk
During transport and installation
Area
Danger
Risk
preventative measures
Under
the unit
Defective lifting system of the
unit, which causes its fall.
Contusions,
trauma.
Keep away from the danger area while handling the
unit.
Near the
unit
Accidental shock with damage
to the refrigerant circuit and leak
of high pressure refrigerant.
Bruises,
formation of
acid vapours.
Keep away from the danger area while handling the
unit. Wear PPE.
Near the
unit
Unstable or unsuitable unit
support that causes its overturn.
Contusions,
trauma.
Make sure the unit support is adequate to its weight, is
stable and levelled. Wear PPE.
Electrical
box
Connection cables under
voltage.
Electroshock Make sure to disconnect the power supply from the
distribution panel.. Remain electrically insulated from
the ground. Wear PPE.
During start-up and operation
Area
Danger
Risk
preventative measures
Near the unit
Suction and following expulsion of
objects, dust, and substances from the
fans in the installation site.
Contusions, trauma.
Clean the installation area.
Wear PPE.
In contact with
the unit
Non-compliant electrical connection
and missing earth connection.
Electroshock.
Remain electrically insulated
from the ground. Wear PPE.
Near water
pipes
Closed shut-off valves; leaks from the
hydraulic pipes. Consequent leaking of
water and additives.
Irritation of skin and
eyes due to contact
with ethylene glycol.
Irritation of the skin
and breathing system
due to glycol vapours.
Electrocution, slipping.
Open the shut-off valves of the
hydraulic circuit. Wear PPE.
Near water
pipes
Condensate formation in the presence
of the dew point with leaks of the not
insulated pipes.
Electroshock, slipping.
Wear PPE.
Near the unit
With unit ON: Losses in the refrigerant
circuit; defective safety valve and high
pressure switch; fire; shut-off valves
in the refrigerant circuit closed after
maintenance; defect on the gas charge
line. Consequent explosive breakage of
the refrigerant circuit.
Bruises, formation of
acid vapours with open
flames..
Wear PPE. In case of fire, wear
fire-fighting masks.
Near the unit
(Electrical box,
supply cables)
Short-circuit; incorrect sizing of the
cables or of the main switch.
Electroshock, fire,
formation of acid
vapours.
Check the fixing of the terminal
cables; select the power supply
cables and main switch. Wear
PPE. In case of fire, wear fire-
fighting masks.
Near the unit
Noise emission.
Injury of the hearing
system.
Wear PPE.
During maintenance
Area
Danger
Risk
preventative measures
Near the unit
Losses in the refrigerant circuit;
defective safety valve and high
pressure switch; fire; defect on
the gas charge line. Consequent
explosive breakage of the
refrigerant circuit.
Bruises,
formation of
acid vapours
with open
flames.
Wear PPE. In case of fire, wear fire-
fighting masks.
Components of the
unit: compressor,
delivery pipes,
condenser
Contact with hot surfaces.
Bruises.
Avoid the contact. Wear PPE.
Condenser
Contact with sharp surfaces (fins).
Cuts,
abrasions.
Wear PPE.
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