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EN/06.2021/G23 © STULZ GmbH – all rights reserved
minispace cw original instructions
Admissible return air conditions:
Temperature: Lower limit:
16 °C
Upper limit:
40 °C
Humidity:
Lower limit: 5,5 °C dew point
Upper limit: 60 % r. h. and 15 °C dew point
Storage conditions:
Temperature [°C]:
-20 - +60
Humidity [% rel. h.]:
5 - 95
Atmosphere pressure [kPa]:
70 - 110
Chilled water conditions:
min. temperature at the unit inlet:
5 °C
min. temp. difference with 5 °C EWT:
4 K
max. head pressure:
16 bar
Water conditions for optional hot water reheat:
max. water inlet temperature:
110 °C
max. water head pressure:
16 bar
Type of network:
TN-S; TN-C-S
Voltage:
400V/50 Hz/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:
230V/50Hz/3Ph/PE
208V/60Hz/3Ph/PE
230V/60Hz/3Ph/PE
380V/60Hz/3Ph/N/PE
460V/60Hz/3Ph/PE
Other voltages on request.
Voltage/frequency tolerances as for 400V/50Hz/3Ph.
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/50 Hz/3Ph). 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 electric network and UPS
systems:
• the output voltage of the electric network or UPS sys-
tem must be grounded neutral (wye).
• the voltage distortions must be within the limits stated
below and no inadmissibly high DC voltage portions
may exist.
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%
• all-pole sinus filters must be provided at the UPS sys-
tem output.
The warranty is invalidated for any possible damage or
malfunction that may occur during or in consequence of
operation outside the application limits.
4. Technical data
4.1 Application limits
Design conditions
Electrical connection:
400V/50 Hz/3ph/N/PE
Downflow units with an external static pressure:
20 Pa
Upflow units with an external static pressure:
50 Pa
Return air conditions for cooling capacity:
26 °C, 40 % rel. h.
Water inlet temperature:
10 °C
Water outlet temperature:
15 °C
Cooling fluid:
Water, 0 % glycol
The sound pressure levels are valid at a height of 1m and distance of 2m in front of the unit under free field conditions
and with nominal data. The values take into account the effects of all installation and design parts contained in the stan
-
dard unit. The values for upflow units assume an installed discharge duct.
