Stulz EC Tower ECD 91 - Page 26

26 EN/01.2019/G22 © STULZ GmbH – all rights reserved
EC TOWER TECHNICAL MANUAL
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
** Pre-installed steam cylinder for 350750 µS/cm conductivity
Technical Data of outdoor unit
Self-diagnosis system
● ● ● ● ● ●
Fan Qty. 1 1 1 2 2 2
Max. airflow m3/h 2,400 3,600 4,500 6,000 8,100 8,580
Standard noise level
(as per JIS)
dB(A) 50 51 51 49 57 59
Sound power level (as per JIS) dB(A) 63 66 73 72 72 73
Dimensions (HxWxD) mm
640 
871  290
750 
968  340
845 
970  370
1,300 
970  370
1,300 
970  370
1,505 
970  370
Weight kg 45 60 82 105 115 143
● Available in the standard EC Tower version
Refrigerant and refrigerant pipes
Max. pipe length of outdoor/
indoor unit
m 30 50 50 100 70 70
Max. height difference, outdoor
unit higher/lower
m 20/20 30/15 50/15 30/15 30/15 30 /15
Refrigerant/GWP/CO2
equivalent
R410A/2088/1 kg of R410A is equivalent to 2.088 t CO2
Refrigerant quantity (pre-filled) kg 1.5 2.95 3.8 4.5 5.6 7.2
Pre-filled refrigerant for pipe
length up to
m 15 30 30 30 30 30
Refrigerant refill quantity per m
of fluid pipe
kg 0.02 0.06 0.06 0.06 0.06 0.12
Refrigerant injection EEV in outdoor unit
Chiller oil type/
oil content
Type/
l
MA68/
0.45
MMA68/
0.675
MMA68/
0.9
MMA68/
0.9
MMA68R/
1.5
MMA32R/
1.45
Fluid pipe/
unit connection
mm/
inches
Ø 6/
Ø 1/4"
Ø 10/
Ø 3/8"
Ø 10/
Ø 3/8"
Ø 10/
Ø 3/8"
Ø 10/
Ø 3/8"
Ø 12/
Ø 1/2"
Gas line/
unit connection
mm/
inches
Ø 12/
Ø 1/2"
Ø 16/
Ø 5/8"
Ø 16/
Ø 5/8"
Ø 16/
Ø 5/8"
Ø 22/
Ø 7/8"
Ø 22/
Ø 7/8"
Thermal insulation, imperme-
able to vapor diffusion
All pipes