25 © STULZ GmbH – all rights reserved EN/01.2019/G22
EC TOWER TECHNICAL MANUAL
EC Tower model ECD/U
Size 1 Size 2
91 181 251
Outdoor unit
SRC 50 ZSS/
ZSXS
FDC 71 VNX FDC 140 VSA FDC 140 VSX FDC 200 VSA FDC 250 VSA
Key energy values * (+24 °C/50 % inside; –15 °C to +35 °C outside)
Mean total cooling capacity,
generated
kW 5.4 8.9 13.0 14.7 23.2 26.7
Mean sensible cooling capaci-
ty, available
kW 4.5 7.3 11.0 12.2 18.5 22.4
Mean power consumption, out-
door unit, cooling
kW 1.3 2.3 3.5 4.6 7.1 8.4
Mean EER of outdoor unit
(24 °C/ 50 % inside; –15 °C to
+35 °C outside)
4.1 3.9 3.7 3.2 3.3 3.2
* Contrary to the design values, the key energy figures are stated for one temperature range, because this enables annual energy
consumption to be estimated.
The mean power consumption differs from the nominal power consumption in that it takes account of the outside temperature profile
over the year, as when calculating an annual energy rate.
Technical Data of indoor unit
Nominal airflow rate m³/h 2,000 2,500 6,000 7,000 7,000 7,500
Max. airflow rate m³/h 2,500 3,000 8,000 8,000 8,000 8,000
Min. airflow rate m³/h 1,000 1,200 3,200 3,200 3,200 3,200
Available max. external pressu-
re at nominal flow rate
Pa 300
Nominal external static pressu-
re (Downflow/Upflow)
Pa 20/50
Nominal fan power consump-
tion (version 07: Downflow/
Upflow)
kW 0.25/0.25 0.3/0.3 1.0/1.0 1.0/1.0 1.4/1.5 1.7/1.8
Max. fan power consumption
(version 07: Downflow/Upflow)
0.75 0.75 2.6 2.6 2.6 2.6
Return air filter class (Upflow)
EN 779/ISO 16890
G4/ISO Coarse 50%
Return air filter class (Down-
flow) EN 779/ISO 16890
G4/ISO Coarse 50%
Electric heater kW 2 2 2 6
Steam humidifier ** kg/h 3 5 8
Max. power consumption of
steam humidifier
kW 2.25 3.75 6
Noise level, Downflow
(Version 07)
dB(A) 49.3/47.3 57.7/55.2 60.2/58.0
Noise level, Upflow
(Version 07)
dB(A) 52.0/50.0 59.4/57.2 62.5/60.2
Dimensions (HxWxD) mm 1,861 600 701 1,861 1,000 911
1,861
1,000 911
Footprint (WxD) mm 600 600 1,000 810 1,000 810
Weight kg 126 292 295
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