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CDU - Condensing unit
Certification manual
Certification Manual
Documents
OM (Operational Manual)
RS (Rating Standard)

Scope of the programme

The programme scope covers air-cooled and water-cooled stationary condensing units designed for low (LT) and/or medium (MT) temperature applications in the field of commercial and industrial refrigeration.

The certification programme is applicable to condensing units using the following refrigerants:

  • R134a and list of alternatives defined in Appendix C (MT)
  • R290 and list of alternatives defined in Appendix C (MT and LT)
  • R448A and list of alternatives defined in Appendix C (MT and LT)
  • R410A and list of alternatives defined in Appendix C (MT and LT)
  • R744 (MT and LT)

The scope is limited to the following refrigerating capacities comprised between

  • 0.1 and 20 kW included (LT)
  • 0.2 and 50 kW included (MT)

Definitions

Condensing unit

In the present CDU programme, the definition from regulation 2015/1095 applies: product integrating at least one electrically driven compressor and one condenser, capable of cooling down and continuously maintaining low or medium temperature inside a refrigerated appliance or system, using a vapour compression cycle once connected to an evaporator and an expansion device.

Low temperature application (LT)

Is referred to as “low temperature application” or LT an application where the condensing unit is capable of delivering its rated refrigerating capacity at a saturated evaporating temperature of -35 °C.

Medium temperature application (MT)

Is referred to as “medium temperature application” or MT an application where the condensing unit is capable of delivering its rated refrigerating capacity at a saturated evaporating temperature of -10 °C.

Rated refrigerating capacity

Is referred to as “rated refrigerating capacity” the refrigerating capacity delivered by the condensing unit at full load and for the following temperature constraint :

  • +32 °C ambient temperature (rating point A) for air-cooled condensing units.