12 EN/06.2016/i01 © STULZ S.p.A. – all rights reserved
WPA EXPLORER ORIGINAL INSTRUCTIONS
2. Residual risk
2.1 Transport and installation
Area Danger Risk Preventative measures
Under the unit Faulty lifting system of the unit
causing its fall.
Bruises, trauma. Keep away from the danger area while
handling the unit
Beside the unit Support of the unit unstable or
inadequate causing its tipping.
Bruises, trauma. Make sure the unit support is adequate
to its weight, is stable and level. Wear
protective equipments (helmet, gloves,
safety shoes)
In the lower part of the
unit
Sharp edges, built-in parts Cuts, contusions, burns, forma-
tion of acid vapours
Keep away from the danger area while
handling the unit. Wear protective equip-
ments (helmet, gloves, safety shoes)
Electrical box Connection cable under volt-
age, sharp edge of openings
for the cable introduction
Electric shock, cable damage at
positioning
Check and make sure the unit is de-
energized. Stand on isolated ground.
Take care that sharp edges are always
protected by rubber grommets. Wear
protective equipments (helmet, gloves,
safety shoes)
2.2 Start-up
Area Danger Risk Preventative measures
In the lower part of the
unit, refrigerant piping
Defective filling line for refrig-
erant, leaks in the refrigerant
piping, closed stop valves,
defective safety valve
Discharge of refrigerant under
high pressure, burns in case of
contact to the skin, formation of
acid vapours with open flames
Open stop valves.
Wear safety glasses and gloves
In the lower part of the
unit, water piping
Leaks in the water lines, closed
stop valves
Discharge of water under high
pressure, contact with the skin
of ethylen glycol, irritation of
eyes and respiratory system by
glycol vapours, increased risk of
electric shock in combination
with electricity, risk of slipping
Open stop valves.
Wear rubber gloves, ethylen glycol is
adsorbed by the skin Avoid swallowing
water with glycol additives
Electrical box Short circuit Electric arc, acid vapours Retighten terminal connections, Wear
protective gloves
2.3 Operation
Area Danger Risk Preventative measures
In the lower part of the
unit, refrigerant piping
Leaks in the refrigerant piping,
defective safety valve/high
pressure switch, fire
Discharge of refrigerant under
high pressure, explosion of
pipe sections, formation of acid
vapours with open flames
In case of fire wear protective mask
Hot gas line The line can take a tempera-
ture up to 70°C
Burn in case of contact to the
skin
Wear safety gloves. Cover lower arms
with clothing
Electrical alimentation Falsely dimensioned cables or
protection devices
Short-circuit, fire, acid vapours Correctly design alimentation cables and
protection elements. Wear protective
mask
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