The present certification programme covers IT Cooling Units specifically designed and used to regulate air temperature and optionally air humidity of an enclosed space containing critical equipment such as IT equipment or telecommunication equipment.
The IT Cooling technologies considered in the scheme are Computer Room Air Conditioners Direct Expansion (CRAC) and Computer Room Air Conditioner Chilled Water (CRAH). HYBRID technologies pairing these technologies are also covered by the scope as an option.
Are excluded from the scope:
The IT cooling units must be factory made units designed as a single packaged unit or a single split unit. Units must be 50 Hz frequency units, optionally 60 Hz units can be declared in addition to the 50 Hz. The units can be ducted or non-ducted units, as well on the air return or on the air supply. Floating floors air return or supply are considered as a duct.
Three air flow configurations of cooling are covered:
The air flow direction can be:
Computer Room Air Conditioner Direct Expansion (CRAC)
IT Cooling unit using dedicated electrically driven compressors and refrigerant cooling coils.
Computer Room Air Conditioner Chilled Water (CRAH)
IT Cooling Unit using water coils for cooling without any dedicated compressors and refrigerant cooling coils.
Down-flow
Air passes vertically downward through cooling coil. Return air enters the top of the unit and supply air leaves at the bottom or the front of the unit.
Horizontal-flow
Air passes horizontally through cooling coil. Return air enters the rear of the unit and supply air leaves at the front or the lateral side of the unit
Up-flow
Air passes vertically upward through cooling coil. Return air enters from the bottom or front of the unit and supply air leaves at the top of the unit
Single Packaged Unit
Factory assembly of components of a refrigeration system designed to be installed together and suitably fixed on a common mounting to form a single unit.
Single split unit
Factory assembly of components of refrigeration system fixed on two mountings to form a discrete matched functional unit
The performances certified are the following:
|
N° |
Certified performance |
Unit |
Symbol |
|
1 |
Net Total Cooling Capacity |
kW |
Pc |
|
2 |
Net Sensible Cooling Capacity |
kW |
Ps |
|
3 |
Power input |
kW |
Pe |
|
4 |
A-weighted sound power indoor side |
dB(A) |
Lw-in |
|
5 |
A-weighted sound power radiated by duct |
dB(A) |
Lw-du |
|
6 |
A-weighted sound power outdoor side |
dB(A) |
Lw-out |
|
7 |
Water pressure drop |
Pa |
Dpc |
|
8 |
Supply Air Flow |
m3/h |
Qv |
|
9 |
Net EER Energy Efficiency Ratio |
W/W |
EER |
|
10 |
Net SHR Sensible Heat Ratio |
W/W |
nSHR |