UK CLOSE CONTROL GEN 24 - Flipbook - Page 8
CLOSE CONTROL / VERTICAL DX UNITS
GENERAL INDEX
R Series - In-Row
In-row solution.
Cooling capacity - chilled water: 24,5 to 37,3 kW.
Cooling capacity - direct expansion: 11,4 to 36,6 kW.
The range at a glance
In air conditioning systems for large data centres, use of
the following design concepts has now become a
consolidated practice:
· The racks containing the servers are being increasingly
positioned in accordance with the hot corridor (or hot
aisle), and cold corridor (or cold aisle) layout.
· The air temperatures are left to rise up to 30 ~ 35 °C in
the hot corridor, and 20 ~ 25 °C in the cold corridor, with
very low humidity (never more than 30%).
· The performance of servers is continually increasing,
while their size is getting smaller and smaller.
Many more servers can therefore be installed in one rack,
allowing the remaining empty racks to be eliminated. At
the same time, the dissipated heat rises, and more power
is therefore required of the air conditioners.
Advantages
· Air flow distribution as close as possible to servers
· Rear suction from hot aisles and front delivery to cold
aisles
· Front and rear access for ease of maintenance
· Hydraulic, refrigeration and electrical connections from
above or below
Free cooling and two sources models available.
Technical features
HRA - direct expansion air conditioners with air-cooled or water-cooled condensers
Sizes
Cooling capacity 1)
kW
Sensible cooling capacity 1)
kW
EER 2)
121
201
231
361
11,4
22,0
22,9
36,6
11,4
19,9
22,6
34,7
3,70
3,52
3,66
3,91
6 000
Air flow rate
m³/h
3 200
3 600
6 000
Sound pressure level 3)
dB(A)
51
53
54
56
1 970
1 970
2 000
2 000
Dimension
Height
mm
Width
mm
300
300
600
600
Depth
mm
1 200
1 200
1 220
1 220
kg
220
235
235
235
Water-cooled free cooling
Overall weight
○
○
●
○
Two sources
○
○
●
○
HRU - chilled water air conditioners
Sizes
Cooling capacity 1)
kW
Sensible cooling capacity 1)
kW
EER 2)
20
40
24,5
37,3
24,5
37,3
23,09
27,82
9 000
Air flow rate
m³/h
5 600
Sound pressure level 3)
dB(A)
53
62
1 970
2 000
Dimension
Overall weight
Two Sources
Height
mm
Width
mm
300
600
Depth
mm
1 200
1 220
kg
145
210
○
●
1) Performance refers to: intake air 32 °C-30%Rh; R410A refrigerant; condensing temperature 45 °C; water temperature 12/20 °C; external static pressure 30 Pa. The declared performance does not consider
the heat generated by the fans, which must be added to the thermal load of the system. 2) EER (energy efficiency ratio)= total cooling capacity / input power of compressors + input power of fans (excluding aircooled condensers). 3) Sound pressure levels at a distance of 2 m; in a free field; pursuant to UNI EN ISO 3744:2010.
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