14
EN/02.2018/G17F © STULZ GmbH – all rights reserved
cyberlab original instructions
Admissible return air conditions:
Temperature: Lower limit:
18 °C
Upper limit:
35 °C
Humidity: Lower limit: 5 °C dew point
Upper limit: 40 % r. h. at 30 °C and
70 % r. h. at 14 °C
Outdoor ambient conditions:
lower limit: -10°C, depending on selected option down to
–45°C
upper limit: depending on selected condenser
Storage conditions:
Temperature [°C]:
-20 - +42
Humidity [% rel. h.]:
5 - 95
Atmosphere pressure [kPa]: 70 - 110
Max. length of piping between A/C unit and
air-cooled condenser:
30 m equivalent
Max. level difference condenser−A/C unit:
10 m (condenser above the A/C unit)
5 m (condenser below the A/C unit)
Voltage:
400V/50Hz/3Ph/N/PE
Voltage tolerancy:
+/- 10 % (not for permanent operation)
Frequency tolerancy:
+/- 1 %
The following voltages are also available for this A/C unit
series: 380V/60Hz/3Ph/N/PE
Other voltages on request.
Voltage/frequency tolerances as for
400V/50Hz/3Ph/N/PE.
The cooling capacity, air flow, water flow, pressure loss,
sound pressure level and valve sizes change with a voltage
different from the standard voltage (400V/50Hz/3Ph/N/
PE). In this case, see the technical data by the help of the
„Stulz Select“ planning tool.
The unit design, the external dimensions, the weight, the
position and size of the supply connections are indepen-
dent of the supply voltage and can be found in this manual.
Requirements for uPS systems:
(in case of permanent operation of the EC fans with a UPS
system)
• the output voltage of the UPS system must be groun
-
ded neutral (wye).
• the voltage distortions must be within the limits stated
below and no inadmissibly high DC voltage portions
may exist.
• all-pole sinus filters must be provided at the UPS sys
-
tem output.
transient peak over-voltage phase to ground:
max. 4 kV (1,2/50µs wave form; Z=12 Ohms in acc. to
ANSI)
transient peak over-voltage phase to phase:
max. 2 kV (1,2/50µs wave form; Z=2 Ohms in acc. to
ANSI)
ripple voltage phase to ground:
dV/dt < 1V/µs (
≡
1000V/ms)
voltage harmonics: THD(V) < 8%
The warranty is invalidated for any possible damage or
malfunction that may occur during or in consequence of
operation outside the application ranges.
4. technical Data
4.1 Application limits
Setting of the pressure switch:
HP switch
R410A
releases at
bar
36,0
manual reset possible at
bar
29,0
Safety valve
bar
40