Operating Conditions; Refrigerant And Lubricants - Danfoss MLZ Evolution A Application Manuallines

Application Guidelines
Refrigerant and
lubricants
General information
R22
R134a
R404A
R507
R407A & R407F
R452A
R513A

Operating conditions

The scroll compressor application range is
influenced by several parameters which need to
be monitored for a safe and reliable operation.
These parameters and the main
recommendations for good practice and safety
devices are explained hereunder.
When choosing a refrigerant, different aspects
must be taken into consideration:
• Legislation (now and in the future)
• Safety
• Application envelope in relation to expected
running conditions
• Compressor capacity and efficiency
• Compressor manufacturer recommendations &
guidelines
R22 is an HCFC refrigerant and is still a wide
use today. It has a low ODP (Ozone Depletion
Potential) and therefore it will be phased out in
the future. Check local legislation.
Refrigerant R134a is an HFC refrigerant. R134a
has zero ozone depletion potential (ODP = 0)
and is commonly accepted as the best R12
alternative. R134a is a pure refrigerant and
R404A is an HFC refrigerant. R404A has zero
ozone depletion potential (ODP = 0). R404A
is especially suitable for low evaporating
temperature applications but it can also be
applied to medium evaporating temperature
applications. R404A is a mixture and has a very
R507 is an HFO refrigerant with properties
comparable to R404A. R507 has no ozone
depletion potential (ODP = 0). As with R404A,
R507 is particularly suitable for low evaporating
R407A and R407F are two HFC refrigerants with
similar properties. Both have a GWP below 2200
and comply with the EU F-gas regulation. They
R452A is a HFO refrigerant and has no ozone
depletion potential. It has a GWP below 2200 and
complies with the EU F-gas regulation.
R513A is a HFO refrigerant and has no ozone
depletion potential. It has a GWP below 1000 and

• Refrigerant and lubricants

• Motor supply
• Compressor ambient temperature
• Application envelope (evaporating
temperature, condensing temperature, return
gas temperature)
Additional points could influence the final choice:
• Environmental considerations
• Standardisation of refrigerants and lubricants
• Refrigerant cost
• Refrigerant availability
When R22 is applied in refrigeration applications
it can lead to high discharge temperature.
Carefully check all other parameters that can
influence the discharge temperature.
has zero temperature glide. For applications
with high evaporating and high condensing
temperatures, R134a is the ideal choice.
small temperature glide, and therefore must
be charged in its liquid phase, but for most
other aspects this small glide can be neglected.
Because of the small glide, R404A is often called a
near-azeotropic mixture.
temperature applications but it can also be
used for medium evaporating temperature
applications. R507 is an azeotropic mixture with
no temperature glide.
can be used as alternatives to R404A and R507
refrigerants in MBP application.
It can be used as alternative to R404A and R507
refrigerants in MBP application.
complies with the EU F-gas regulation. It can be
used as alternative to R134a refrigerant.
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