Cosmotec OR Series, Manual

Page: 6 / 34

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rev 09.2017 - ©STULZ S.p.A. - all rights reserved
INCOMING OUTGOING
FLUID FLUID
CHILLER CHILLER
TANK LEVEL ROTATION DIRECTION
ENGINES
RISK OF TENSION
ATTENTION! HOT SURFACES
LEVEL OF PROTECTION
SERIES MODELS INSTALLATION POWER CONTROL
PANEL
PROTECTION
(mounted on the
machine)
ENGINE
PROTECTION
(from the
external
environment)
WLA Compact ALL INDOOR 230/1/50-60 IP 21 IP 21
WRA Ve
ORA O-FLOW
WRA 13-20-35-
45-58-70-85
ORA 20-34-43-
58-70
INDOOR
230/1/50-60
400/3/50 460/3/60
IP 21 IP 21
WRA Ve
ORA O-FLOW
WRA 95-A3-
A6-A8-B4-B8-
C2-C8-D8
ORA 95-A3-A6
OUTDOOR
400/3/50 460/3/60
IP54 IP 44
WLA Precision ALL OUTDOOR
400/3/50 460/3/60
IP54 IP 44
WLA Precision
R410A
ALL OUTDOOR
400/3/50 460/3/60
IP54 IP 44
The IP (International Protection) code is a convention defined in EN 60529 standard (implemented
by CEI as CEI 70-1 standard) to identify the degree of protection provided by enclosures for
electrical and electronic equipment against the penetration of external agents in solid or liquid form.
PRINCIPLE OF OPERATION
The chiller is designed to chill liquids and is suitable for industrial environments. Its use allows the
temperature of the liquid to chill to be controlled.
The principle of operation is the following:
The compressor compresses coolants, bringing it to a high pressure and temperature; the gas passing
through the condenser is chilled and liquefied, releasing heat into the environment. Pushed toward the filing
system or valve, the liquid gas drops in pressure which helps its evaporation, which occurs in the evaporator,
in contact with the liquid coming from the catchments that is chilled.