Operating Conditions; Refrigerant And Lubricants; Motor Supply; Compressor Ambient Temperature - Danfoss VRJ Application Manuallines

Application Guidelines

Refrigerant and lubricants

General information
PVE
Residual moisture

Motor supply

Compressor ambient
temperature
High ambient temperature
Low ambient temperature

Operating conditions

VRJ scroll compressor application range is
in uenced 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, di erent aspects
must be taken into consideration:
• Legislation (now and in the future)
• Safety
• Application envelope in relation to expected
running conditions
• Compressor capacity and e ciency
• Compressor manufacturer
recommendations & guidelines
Polyvinyl ether (PVE) is an innovative refrigeration
lubricant for HFC refrigerant systems. PVE is as
hygroscopic as existing polyolester lubricants
(POE), but PVE does not chemically react with
water; no acids are formed and compressor
evacuation is easier.
Prior to shipment from the factory, every
compressor is dehydrated, evacuated, and
charged with dry nitrogen. Maximum residual
VRJ scroll compressors can be operated only
connected to the dedicated variable speed
drive, at nominal voltages as indicated in "supply
VRJ scroll compressors can be applied from
-13°F to 125°F ambient temperature. The
compressors are designed as 100 % suction gas
In case of enclosed tting and high ambient
temperature, it is recommend to check the
Although the compressor itself can withstand
low ambient temperature, the system may
require speci c design features to ensure safe
Refrigerant and lubricants
Motor supply

Compressor ambient temperature

Application envelope (evaporating
temperature, condensing temperature, return gas
temperature)
Additional points could in uence the nal choice:
• Environmental considerations
• Standardisation of refrigerants and
lubricants
• Refrigerant cost
• Refrigerant availability
The compressor technology applied in Danfoss
VRJ scroll compressors in combination with PVE
lubricant provides the best possible result in
terms of reliability and compressor lifetime.
moisture levels are 0.0082 oz. for model VRJ028,
and 0.0120 oz. for VRJ035 and VRJ044.
voltage" section. Under-voltage and over-voltage
operation is allowed within the indicated voltage
range.
cooled without need for additional fan cooling.
Ambient temperature has very little e ect on the
compressor performance
temperature of power wires and conformity to
their insulation speci cation.
and reliable operation. See below sections for
recommendations.
AB141686422149en-US0401
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