Stulz EC Tower ECD 91 - 6. Technical data; 6.1 Application limits

22 EN/01.2019/G22 © STULZ GmbH – all rights reserved
EC TOWER TECHNICAL MANUAL
Admissible return air conditions:
Temperature: Lower limit: 18°C
Upper limit: 35°C
Humidity: Lower limit: 5,5°C dew point
Upper limit: 60% r.h. and 15°C dew point
Outside air conditions:
Lower limit: -15°C
Upper limit: +43 °C
Storage conditions:
Temperature [°C]: -20 - +42
Humidity [% rel. h.]: 5 - 95
Atmosphere pressure [kPa]: 70 - 110
Voltage:
400V/50 Hz/3ph/N/PE
Voltage tolerancy:
+/- 10% (not for permanent operation)
Frequency tolerancy:
+/- 1%
The warranty is invalidated for any possible damage
or malfunction that may occur during or in conse-
quence of operation outside the application limits.
6. Technical data
6.1 Application limits
- Cooling begins when the stated minimum cooling capacity is reached.
- Operate the steam humidifier only with feed water that conforms to the specification: see section “7.6
Establishing the conductivity of the feed water“ on page 47.
Minimum performance requirements of the EC Tower dependent on the outdoor unit
Adhere to the following minimum values for the layout and operation of the EC Tower.
EC Tower model ECD/U
Size 1 Size 2
91 181 251
Outdoor unit
SRC 50 ZSS/
ZSXS
FDC 71 VNX FDC 140 VSA FDC 140 VSX FDC 200 VSA FDC 250 VSA
Minimum heat load of room requi-
ring cooling
kW 2.0 2.4 4. 3 4.3 6.0 8.5
Minimum airflow rate for cooling/
humidification/dehumidification
m³/h 1,000 1,200 3,200 3,200 3,200 3,200