9
Operating Range
Operating envelope
The operating envelope is in accordance with EN 12 900, with a superheat of 10K for air conditioning
and heat pump applications, and return gas of 20°C for all other applications (See diagrams in
the appendices).
For more information please refer to the Technical Data Sheet for each product.
Operating compression ratio
The operating compression ratio is the ratio between absolute condensing and evaporating pressures.
It is essential to adhere to the maximum values listed in the following table.
Exceeding these values will reduce the working life of the compressor or even cause a breakdown.
Operating pressure differential
The operating pressure differential corresponds to the difference between absolute discharge and suc-
tion pressure. Maximum levels are listed in the table below. Exceeding these values will reduce the wor-
king life of the compressor or even cause a breakdown.
2
2.1
2.2
2.3
Air Conditioning
or Heat Pump
REFRIGERANT COMPRESSION RATIO
APPLICATION
R22 7
R134a 15.8
R407C 7
R404A 8
R134a 15.8
R404A 22
Commercial Refrigeration
Low Back Pressure
Commercial Refrigeration
High Back Pressure
Air Conditioning
or Heat Pump
REFRIGERANT PRESSURE DIFFERENTIAL (BAR)
APPLICATION
R22 22
R407C 23.5
R134a 23
R404A 25
R134a 23
R404A 27.1
Commercial Refrigeration
Low Back Pressure
Commercial Refrigeration
High Back Pressure
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