Third party certification
Return to the list
ITCU - It cooling units
Certification manual
Certification Manual
Documents
Technical Certification Rules

Scope of the programme

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:

  • Packaged CRAC air cooled units
  • Multi-Split units
  • Partial IT Cooling units without any fan

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:

  • ROOM Based Cooling unit
  • ROW Based Cooling Unit
  • RACK Based Cooling Unit

The air flow direction can be:

  • Down-flow
  • Up-flow
  • Horizontal-flow

Definitions

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

Certified performance items and associated tolerances

The performances certified are the following:

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