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© STULZ S.p.A. – all rights reserved EN/06.2016/i09
WSA ExplOrEr OriginAl inStructiOnS
2.4 Maintenance
Area
Danger
risk
preventative measures
At the lower part of the
unit, refrigerant piping
Leaks in the refrigerant piping,
defective safety valve/high
pressure switch
Discharge of refrigerant under
high pressure, burns in case of
contact to skins, formation of
acid vapours with open flame
Wear safety glasses and gloves
Pressure lines,
compressor
Heat
Burns in case of contact to
the skin
Wear safety gloves. Avoid contact to hot
unit parts
Fin heat exchanger, air
side
Sharp edges, fins
Injuries by cutting
Wear safety gloves
Electrical box
Live components, supposed to
be voltage-free
Electric shock
1. Disconnect mains
2. prevent reconnection
3. test for absence of harmful voltages
4. ground and short circuit L1, L2, L3
conductor in electric cabinet
5. Cover or close off nearby live
components
To energize apply these procedures in
reverse order
2.5 Dismantling
Area
Danger
risk
preventative measures
Refrigerant piping
Soldering off or cutting the
refrigerant pipes still under
pressure
Discharge of refrigerant under
high pressure, burns in case of
contact to the skin
Depressurize pipes before disconnecting
them. Wear safety glasses and gloves
Water piping
Unscrewing the water pipes
still under pressure
Discharge of water under high
pressure, contact with the skin
of ethylen glycol, increased
risk of electric shock in com-
bination with electricity, risk of
slipping
Drain of cooling water by drain valve.
Wear rubber gloves
Electrical box
Live electrical alimentation
cable
Electric shock
Check de-energized state of the alimen-
tation before dismantling, wear safety
gloves
2.6 Safety Data
Safety data of the refrigerant
1. Identification of the
substance / preparation
Identification of
preparation
STAR COLD 134a
Recommended uses
Refrigerant
2. Composition/
Information on
ingredients
Tetrafluoroethane
(C2H2F4)
CAS No. 811-97-2
CE No.: 212-377-0
Concentration: 100%
WArning
please, refer to the specific “Safety Data Sheet” of refrigerant gas
