High precision air-conditioners for
data centres cooling, with new
inverter technology and R-410A
refrigerant, from 6 to 100 kW
From Climaveneta’s experience
i-ACCURATE high precision air conditioners,
available both as direct expansion and
free-cooling versions are the most efficient
and reliable solution on the market.
2 l 3
Coming form 40 years experience in air conditioning and
process cooling, i-ACCURATE is the ultimate solution for
technical rooms and data centres cooling:
Precise temperature
and humidity control
Complex IT centres require to keep temperature and humidity
within very strict parameters. This is particularly difficult due to
extremely variable thermal loads, that require very high cooling
capacity at full load, in order to avoid to compromise the correct
operation of the IT machines when they are more necessary.
The massive use of the new inverter technology on HPAC units
for technical rooms, makes possible to keep ambient
temperature and humidity constant even with very strong loads
variations, preventing dangerous temperature variations, almost
unavoidable with traditional ON/OFF compressor driven units.
Cooling
IT load
Data Center energy consumption
High efficiency at partial loads
Most energy consumed by modern data centres is due to ambient
cooling. In more and more cases the cost due to cooling are
higher than those caused by data exchange. In systems
characterized by H24 operations, also the slightest compromise
concerning efficiency has dramatic implications in the operating
costs of the whole data centre. Hence it is crucial that the air
conditioning system of the centre works effectively also at part
loads, which are the most frequent operating condition, in order to
reduce the overall operating cost. i-ACCURATE strong point is
exactly efficiency at part loads. Thanks to the adoption of inverter
DC brushless compressors up to 30kW and inverter AC for lager
capacities, these units can reduce by 50% consumptions at part
load, if compared to a traditional ON/OFF compressor. This is
made possible also thanks to the advantages of variable air flow
enabled by last generation EC fans.
Versatility
The many types of structures used as technical areas and the
need to optimize their dimensions, require flexible solutions,
that can adapt to any room, always granting perfect control
and highest efficiency.
This means complete flexibility, both as concerns capacities
(from 6 to 100 kW Inverter), as well as configuration and
system with 7 different cooling solutions, including
FREECOOLING with R410A.
Inverter
technology
The inverter driven compressor, though the variable frequency,
modulates the power capacity provided, hence enabling to
optimize the performances at part load, increasing efficiency.
Moreover a larger capacity can be reached at full load, thus
ensuring that the required temperature will be reached in a
shorter time. Afterwards temperature variations can be easily
controlled with minimized energy consumption, because once
the set is reached, the compressor works at part load,
reducing energy consumption and effectively maintaining the
desired conditions.
Annual power consumption
In case of low Hz Operation
Max 70%
100%
55%
In this respect i-ACCURATE represents the ultimate solution in
high precision air conditioning, with the most updated
compressors, both DC inverter brushless, for units from 7 to
30 kW and Inverter AC for larger capacities.
Both solutions allow to perfectly adapt the unit’s performance
to the real requirements of the building even at part load,
which represent more than 75% of the operating time of the
system. This ensures an energy saving up to 50% higher than
solutions based on traditional ON/OFF compressors.
30%
Constant speed
AC Inverter
DC Inverter
Intelligent
Control
i-ACCURATE, has an intelligent regulation, that allows the
complete control of all the unit’s parameters in any condition.
i-ACCURATE control is completely open and can be set
according to the specific needs of the customer, either on site
or in advance when the unit is produced.
4 l 5
Efficiency, versatility and reliability. These are the
strong points that make i-ACCURATE a point of
reference in high precision air conditioning.
Advantages that come from distinctive technological
choices in every aspect of this units.
-25%
EC-New
generation (DC)
EC (DC)
Plug-in (AC)
-15%
-10%
NEW GENERATION
EC fans
The high efficiency EC fan reduces both noise levels as well as
energy consumption, and assures a variable air flow at part
loads, optimizing the operating costs of the unit.
Main features
Further noise level reduction 4-5 dB(A)
Further absorbed power reduction by 15%
An advanced logic simultaneously manages fans and inverter
compressors modulation, with savings at part loads up to 50%.
EC fans
also in the remote condensers
The use of EC technology even on the remote condenser fan
assures a further average reduction of noise levels by 10%,
together with a strong reduction of energy consumption by
45% compared with traditional condensers with AC technology.
Electronic
thermostatic valve
The electronic valve is used in a very peculiar way in order to
guarantee optimum operating conditions at the evaporator.
The INVERTER units come with electronic expansion valves as
standard. These valves have a much wider modulation capacity;
it stands out for its quality of control and for its capacity to
quickly reach and maintain the operating stability of the unit and
joined with INVERTER compressor technology allows a quick
fluctuation-free regulation, and therefore a highly accurate
adjustment to the swings of load and ambient conditions.
A
ie
(
(
Types of cooling
i-AXO/i-AXU
DIRECT EXPANSION AIR COOLED, with INVERTER compressor
Refrigerant for heat transfer is used in these direct expansion units. The air in the room is therefore
treated in the evaporating coil containing the refrigerant. The condensation heat is dispersed to a fresh
air condenser that with speed control for condensing control, optimise the condensation pressure even
in adverse temperature conditions.
Units provided per standard with EC inverter fans who represents today the best solution for energy
i-AWO/i-AWU
DIRECT EXPANSION WATER COOLED, with INVERTER compressor
Refrigerant for heat transfer is used in these direct expansion units. The air in the room is therefore treated
in the evaporating coil containing the refrigerant. The condensation heat is dispersed in an internal platetype exchanger connected in turn to a water circuit. The water of condensation may come from a well, local
water mains or closed circuits such as cooling towers or dry coolers.
Units provided per standard with EC inverter fans who represents today the best solution for energy saving.
NB: for negative External T values antifreeze fluids must be used to protect the system
i-ADO/i-ADU Dual Fluid Inverter
These units are per standard provided with a dual cooling systems who never work simultaneously.
A PRIMARY circuit, made by a chilled water circuit (CW) generally connected to an external chiller, plus
a SECONDARY circuit in direct expansion (DX) air cooled, who is considered as BACK-UP. Such units
are particulary indicated anywhere RELIABILITY, SAFETY and REDUNDANCY are required.
Units provided per standard with EC inverter fans who represents today the best solution for
energy saving.
Airflow configuration
OVER
The versions called OVER with
air outflow from the top generally
have the air intake at the front,
rear or bottom of the unit,
according to customer choice,
and the outflow from the top is
along ducts behind suspended
ceilings or front delivery
plenums.
6 l 7
OVER unit with front intake
and delivery plenum
OVER unit with front intake
and top delivery
OVER unit with underfloor intake
and top delivery
OVER unit with rear
intake and top
delivery
All-round flexibility seen as a service offered for any type of system.
i-ACCURATE comes with capacities from 6 to 100 kW in the direct
expansion version with air cooling (i-AXO / i-AXU) and water cooling
(i-AWO / i-AWU) and capacities from 11 to 100 kW in version dual fluid
(i-ADO / i-ADU and i-ATO / i-ATU) and free cooling (i-AFO / i-AFU).
i-ATO/i-ATU Dual Fluid Inverter
These units are per standard provided with a dual cooling systems who never work simultaneously.
A PRIMARY circuit, made by a chilled water circuit (CW) generally connected to an external chiller, plus
a SECONDARY circuit in direct expansion (DX) water cooled, who is considered as BACK-UP.
Such units are particulary indicated anywhere RELIABILITY, SAFETY and REDUNDANCY are required.
Units provided per standard with EC inverter fans who represents today the best solution for
energy saving.
i-AFO/i-AFU Free Cooling Inverter
These units are per standard provided with a dual cooling systems who are often working simulateusly
along the year.
A PRIMARY direct expansion circuit (DX) plus a SECONDARY chilled water circuit (CW) generally
connected to an external dry cooler who is considered as "support" to the primary one.
Such units are particulary indicated anywhere EFFICIENCY & ENERGY SAVING are required.
Units provided per standard with EC inverter fans who represents today the best solution for
energy saving.
UNDER
The versions called UNDER
with air outflow under the floor
have the air intake on the top
of the unit taking air directly
from the environment or
through intake ducts or
plenums.
UNDER unit with top intake
and front delivery plenum
UNDER unit with top intake
and undefloor delivery
8 l 9
r HFC
R-410A
SCROLL
COOLING
i-ACCURATE range unit with R410A &
inverter driven scroll compressor from
6 to 90 kW, air cooled.
ACCURATE INVERTER i-AX
18
Frame
F2
F3
400/3N/50
400/3N/50
R410A
R410A
R410A
R410A
R410A
1
1
1
2
2
Power supply
V/Ph/Hz
Refrigerant
29
400
PERFORMANCES
High Speed
Total cooling capacity
(1)
kW
16,60
28,07
53,14
68,40
84,68
Sensible cooling capacity
(1)
kW
16,60
28,07
50,30
67,30
84,68
SHR
(1)
1,00
1,00
0,95
0,98
1,00
4,09
7,14
13,92
16,47
21,03
3,65
3,24
3,12
3,25
3,12
Total compressors absorbed power
kW
EER
Low speed
Total cooling capacity
(1)
kW
6,27
10,62
23,68
22,06
22,70
Sensible cooling capacity
(1)
kW
6,27
10,62
23,68
22,06
22,70
SHR
(1)
1,00
1,00
1,00
1,00
1,00
kW
1,24
1,96
4,85
4,82
4,83
Total compressors absorbed power
Booster (not continuative functioning)
Total cooling capacity
(1)
kW
20,42
34,77
56,52
85,31
93,47
Sensible cooling capacity
(1)
kW
18,44
31,10
51,30
74,60
89,77
SHR
(1)
0,90
0,89
0,91
0,87
0,96
kW
5,66
8,00
15,24
22,49
24,49
mc/h
4900
8000
13500
19000
25000
2
1
2
3
3
0,47
1,51
3,13
4,57
6,1
53
60
64
67
67
Total compressors absorbed power
VENTILATION
Nominal air flow volume
N° EC Fans
Fan absorbed power
Sound pressure level
kW
(2)
dB(A)
HUMIDIFIER
Capacity
kg/h
5
5
5
8
8
Absorbed power
kW
3,75
3,75
3,75
6
6
ELECTRICAL HEATERS
3
3
3
3
3
kW
8
9
15
18
18
L
mm
1000
1000
1550
2100
2650
P
mm
500
790
790
790
790
H
mm
1980
1980
1980
1980
1980
Steps
Absorbed power
DIMENSIONS
Note
(1) Indoor conditions :24°C-50% Condensing temp.45°C - ESP 20Pa
(2) Measured at 1,5 m height, 2 m in front of the unit in free field
r HFC
R-410A
SCROLL
COOLING
i-ACCURATE range unit with R410A
& inverter driven scroll compressor
from 6 to 100 kW, water cooled.
i-ACCURATE INVERTER i-AW
18
Frame
F2
F3
400/3N/50
400/3N/50
R410A
R410A
R410A
R410A
R410A
1
1
1
2
2
Power supply
V/Ph/Hz
Refrigerant
29
400/3
PERFORMANCES
High Speed
Total cooling capacity
(1)
kW
17,35
29,32
55,00
72,25
91,52
Sensible cooling capacity
(1)
kW
17,04
28,60
50,80
69,48
89,80
SHR
(1)
0,98
0,98
0,92
0,96
0,98
3,68
6,38
13,02
14,47
19,64
4,18
3,71
3,40
3,80
3,56
Total compressors absorbed power
kW
EER
Low speed
Total cooling capacity
(1)
kW
7,27
12,33
25,67
23,61
25,36
Sensible cooling capacity
(1)
kW
7,27
12,33
25,67
23,61
25,36
SHR
(1)
1,00
1,00
1,00
1,00
1,00
kW
0,96
1,43
3,83
3,99
3,92
Total compressors absorbed power
Booster (not continuative functioning)
Total cooling capacity
(1)
kW
21,69
35,30
58,07
88,03
100,09
Sensible cooling capacity
(1)
kW
18,96
31,10
52,00
75,90
93,10
SHR
(1)
0,87
0,88
0,90
0,86
0,93
kW
4,97
7,83
14,46
21,00
23,64
mc/h
4900
8000
13500
19000
25000
2
1
2
3
3
0,47
1,51
3,13
4,57
6,1
53
60
64
67
67
Total compressors absorbed power
VENTILATION
Nominal air flow volume
N° EC Fans
Fan absorbed power
Sound pressure level
kW
(2)
dB(A)
HUMIDIFIER
Capacity
kg/h
5
5
5
8
8
Absorbed power
kW
3,75
3,75
3,75
6
6
ELECTRICAL HEATERS
Steps
3
3
3
3
3
kW
8
9
15
18
18
L
mm
1000
1000
1550
2100
2650
P
mm
500
790
790
790
790
H
mm
1980
1980
1980
1980
1980
Absorbed power
DIMENSIONS
Note
(1) Indoor conditions :24°C-50% Water 30- 35°C - ESP 20Pa
(2) Measured at 1,5 m height, 2 m in front of the unit in free field
10 l 11
SCROLL
COOLING
r HFC
R-410A
Close control unit dual fluid, air cooled direct expansion.
i-ACCURATE range unit with R410A & inverter driven
scroll compressor from 11 to 100 kW, air cooled dual fluid.
i-ACCURATE INVERTER i-AD
Frame
Power supply
Refrigerant
n° Compressors
PERFOMANCES
High speed
Total cooling capacity
Sensible cooling capacity
SHR
Total compressors absorbed power
EER
Low speed
Total cooling capacity
Sensible cooling capacity
SHR
Total compressors absorbed power
Booster (not continuative functioning)
Total cooling capacity
Sensible cooling capacity
SHR
Total compressors absorbed power
PERFOMANCES CW
Total cooling capacity
Sensible cooling capacity
SHR
Water flow
Pressure drop
VENTILATION
Nominal ai flow volume
N° EC Fans
Fan absorbed power
Sound pressure level
HUMIDIFIER
Capacity
Absorbed power
ELECTRICAL HEATERS
Steps
Absorbed power
DIMENSIONS
L
P
H
(1)
(1)
(1)
29
F3
400/3N/50
R410A
1
50
F4
400/3N/50
R410A
1
2
2
27,47
27,47
1,00
6,83
4,02
51,54
49,53
0,96
14,10
3,66
67,43
66,63
0,99
16,76
4,02
89,6
85,1
0,95
21,8
4,11
11,31
11,31
1,00
2,05
21,26
21,26
1,00
4,90
19,37
18,2
0,94
4,88
21
21
1,00
4,95
32,54
30,15
0,93
9,21
54,57
50,78
0,93
14,41
76,6
70,6
0,92
20,2
99,1
89,4
0,90
25,4
29,49
27,59
0,94
5,06
47,95
51,4
47,51
0,92
8,82
55,98
67,59
64,49
0,95
11,6
61,23
91
85
0,93
15,61
57,95
kW
dB(A)
8000
1
1,78
60
13500
2
3,69
64
19000
3
5,38
67
24000
3
6,24
67
kg/h
kW
5
3,75
5
3,75
8
6
8
6
kW
3
9
3
15
3
18
3
18
mm
mm
mm
1000
790
1980
1550
790
1980
2100
790
1980
2650
790
1980
kW
kW
kW
(1)
(1)
(1)
kW
kW
kW
(1)
(1)
(1)
kW
kW
kW
(2)
(2)
(1)
(2)
kW
kW
mc/h
kPa
mc/h
(5)
Note
(1) Indoor conditions : 24°C-50%, Condensing temp. 45°C - ESP 20Pa
(2) Indoor conditions : 24°C-50%, Water 7-12°C - ESP 20Pa
(5) Measured at 1,5 m height in front of the unit in free field
r HFC
R-410A
SCROLL
COOLING
Close control unit dual fluid, air cooled direct expansion
i-ACCURATE range unit with R410A & inverter driven scroll
compressor from 11 to 100 kW, water cooled, dual fluid.
i-ACCURATE INVERTER i-AT
Frame
Power supply
Refrigerant
n° Compressors
PERFOMANCES
High speed
Total cooling capacity
Sensible cooling capacity
SHR
Total compressors absorbed power
EER
Low speed
Total cooling capacity
Sensible cooling capacity
SHR
Total compressors absorbed power
Booster (not continuative functioning)
Total cooling capacity
Sensible cooling capacity
SHR
Total compressors absorbed power
WATER CONDENSER PLATE
Quantity
Condensing water flow
Pressure drop DX functioning
PERFOMANCES CW
Total cooling capacity
Sensible cooling capacity
SHR
Water flow
Pressure drop
VENTILATION
Nominal ai flow volume
N° EC Fans
Fan absorbed power
Sound pressure level
HUMIDIFIER
Capacity
Absorbed power
ELECTRICAL HEATERS
Steps
Absorbed power
DIMENSIONS
L
P
H
29
F3
400/3N/50
R410A
1
50
F4
400/3N/50
R410A
1
2
2
28,58
28,35
0,99
6,15
4,65
53,46
50,26
0,94
13,08
4,09
71,36
68,52
0,96
14,73
4,84
92,9
86,2
0,93
20,2
4,59
12,42
12,42
1,00
1,49
23,24
23,24
1,00
3,79
21,18
18,89
0,89
3,82
22,89
21,73
0,95
3,88
kW
33,3
30,47
0,92
8,72
56,26
51,42
0,91
14,40
80,3
72,0
0,90
18,3
102,2
90,2
0,9
23,9
(1)
l/h
kPa
1
6010
21,74
2
11520
30,24
2
15500
27,07
1
20360
38,57
(2)
(2)
(1)
(2)
kW
kW
29,49
27,59
0,94
5,06
47,95
51,4
47,51
0,92
8,82
55,98
67,59
64,49
0,95
11,6
61,23
91
85
0,93
15,61
57,95
kW
dB(A)
8000
1
1,78
60
13500
2
3,69
64
19000
3
5,38
67
24000
3
6,24
67
kg/h
kW
5
3,75
5
3,75
8
6
8
6
kW
3
9
3
15
3
18
3
18
mm
mm
mm
1000
790
1980
1550
790
1980
2100
790
1980
2650
790
1980
(1)
(1)
(1)
kW
kW
kW
(1)
(1)
(1)
kW
kW
kW
(1)
(1)
(1)
kW
kW
mc/h
kPa
mc/h
(5)
Note
(1) Indoor conditions: 24°C-50%, Water 30-35°C - ESP 20Pa
(2) Indoor conditions: 24°C-50%, Water 7-12°C - ESP 20Pa
(5) Measured at 1,5 m height in front of the unit in free field
12 l 13
r HFC
SCROLL
COOLING
Close control unit dual fluid, air cooled direct
expansion. i-ACCURATE range unit with
R410A & inverter driven scroll compressor
from 11 to 100 kW, free cooling source.
i-ACCURATE INVERTER i-AF
Frame
Power supply
Refrigerant
n° Compressors
PERFOMANCES
High speed
Total cooling capacity
Sensible cooling capacity
SHR
Total compressors absorbed power
EER
Low speed
Total cooling capacity
Sensible cooling capacity
SHR
Total compressors absorbed power
Booster (not continuative functioning)
Total cooling capacity
Sensible cooling capacity
SHR
Total compressors absorbed power
WATER CONDENSER PLATE
Quantity
Condensing water flow
Pressure drop DX functioning
PERFOMANCES FC
Total cooling capacity
Sensible cooling capacity
SHR
Pressure drop FC functioning
VENTILATION
Nominal ai flow volume
N° EC Fans
Fan absorbed power
Sound pressure level
HUMIDIFIER
Capacity
Absorbed power
ELECTRICAL HEATERS
Steps
Absorbed power
DIMENSIONS
L
P
H
29
F3
400/3N/50
R410A
1
50
F4
400/3N/50
R410A
1
2
2
28,58
28,35
0,99
6,15
4,65
53,46
50,26
0,94
13,08
4,09
71,36
68,52
0,96
14,73
4,84
92,9
86,2
0,93
20,2
4,59
12,42
12,42
1,00
1,49
23,24
23,24
1,00
3,79
21,18
18,89
0,89
3,82
22,89
21,73
0,95
3,88
kW
33,3
30,47
0,92
8,72
56,26
51,42
0,91
14,40
80,3
72,0
0,90
18,3
102,2
90,2
0,9
23,9
(1)
l/h
kPa
1
6010
35,85
2
11520
51,48
2
15500
36,77
1
20360
64,48
(2)
(2)
(1)
kW
kW
24,34
24,34
1
65,62
43,5
43,5
1
91,31
57,73
57,73
1
101,17
78,06
78,06
1
94,7
kW
dB(A)
8000
1
1,78
60
13500
2
3,69
64
19000
3
5,38
67
24000
3
6,24
67
kg/h
kW
5
3,75
5
3,75
8
6
8
6
kW
3
9
3
15
3
18
3
18
mm
mm
mm
1000
790
1980
1550
790
1980
2100
790
1980
2650
790
1980
(1)
(1)
(1)
kW
kW
kW
(1)
(1)
(1)
kW
kW
kW
(1)
(1)
(1)
kW
kW
kPa
mc/h
(5)
Note
(1) Indoor conditions: 24°C-50%, Water 30-35°C - ESP 20Pa
(2) Water IN 10°C water flow as DX mode - ESP 20Pa
(5) Measured at 1,5 m height in front of the unit in free field
Sir Francis Bacon
British Philosopher (1561 - 1626)
IBM Mompellier Head offices
Suvidha
Eads - Casa
Over 24 units Accurate in different installations, over
400kW total capacity, provided by:
DX aircooled units, Accurate AXU 50, Accurate AXU 88,
Accurate AXU 40, Accurate AXU 55, Accurate AXO 7,
Accurate AXO 10
India
Dual Fluid units, 8 Accurate ADU60BE,
4 Accurate ADU 30 BE
Spain
DX aircooled units,
Accurate DXO 18
Buygues Telecom
France
DX aircooled units,
Accurate ACU 25 EC,
Accurate ACU 70 EC, Accurate ACU 70 EC,
Accurate ACU 90 EC, Accurate ADU 20,
Accurate ADU 77
14 l 15
Alphabank
Romania
8 Dual fluid units, Accurate ATO 77BE,
Accurate ATO 60BE
Gazprom
Russia
DX aircooled units,
Accurate DLU 077BE,
Accurate DLU 039ME
All around the world, in the most important
data centres, and in all projects where
efficiency, quality and reliability are a must,
i-ACCURATE high precision air conditioners
are the best guarantee
6)
Telefonica Cile
Túneles M-30
Chile
Over 20 DX aircooled units
among which, Accurate AXO 55,
Accurate AXU 60, Accurate AXO 20,
Accurate AXO 07, Accurate AXU 50
Spain
DX aircooled units,
Accurate DXU 20 / 10
Lattelkom Largest Telecommunications
and IT network in Latvia
Over Accurate 24 units in different installations,
over 400kW total capacity, provided by: DX aircooled units,
Accurate AXU 50, Accurate AXU 88, Accurate AXU 40, Accurate
AXU 55, Accurate AXO 7, Accurate AXO 10
Hispasat
Verwaltung der AOK
Deutschland
Caffemacherreihe
Nr. 16 Offices
Spain
DX aircooled units,
Accurate DXU 39 / 29 / 20 / 18
Berlin - Germany
DX watercooled units,
Accurate AWU 26
Hamburg - Germany
DX watercooled units,
Accurate AFU 50
i-ACCURATE_GB_11-2010