Unicla 90 Series, Fittings Manual

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b) Oil quantity
The correct amount of oil must be maintained in the compressor and system. Long hose runs
and dual evaporator systems must have additional oil added to the system.
Severe oil starvation problems may result from insufficient system oil being allowed.
To determine oil quantity required Unicla recommends a calculation as a percentage of
refrigerant charge as follows:
- 20 % for Unicla A group compressors (90,120,150,170 series) in standard applications
- 30 % for Unicla B group compressors (200,330,440,550 series) in applications where suction and
discharge lines exceed 6m in length
Example: Calculate oil charge as 20% of refrigerant charge, 3 kg charge = 3000 g x 20%
= 600 ml (cc) of oil. If fitting a UP200 compressor, then deduct the compressor
initial oil charge to determine amount of oil to be added.
Therefore 600 – 180 = 420cc oil to be added to system.
c) Matching oil
The oil added to the system must be identical to the native oil already installed to the specific
Unicla compressor as identified on the compressor label.
d) Oil separators
Oil separators are strongly recommended in multiple evaporator systems due to oil circulation
rate reduction and in systems where it is deemed the suction may go below zero, such as in
high speed operation or as per the system applications mentioned in the chart above.
5.
Compressor
Model
Refrigerant Oil
type
Viscosity
@40˚C
Viscosity
@100˚C
Application Low side
saturation
Oil
separator
UC R134a Unicla Unidap 7 48.01 10.51 Airconditioning ≥ 0˚C Optional
UP & UX R134a Unicla Unidap 7 48.01 10.51 Airconditioning ≥ 0˚C Optional
UP & UX R134a Emkarate RL68H 65.5 9.3 Airconditioning
≥
0˚C Optional
UP & UX R134a Emkarate RL68H 65.5 9.3 Airconditioning ≥ -10˚C Required
UP & UX R404a Emkarate RL32H 32.5 5.8 Refrigeration ≥ -15˚C Required
UPF R404a Emkarate RL32H 32.5 5.8 Refrigeration ≥ -35˚C Required
UPF R404a Emkarate RL32H 32.5 5.8 Refrigeration
≥
-15˚C Required
UWX R134a Unicla Unidap 7 48.01 10.51 Airconditioning ≥ 0˚C Optional
UWX R134a Emkarate RL68H 65.5 9.3 Airconditioning ≥ 0˚C Optional