Unicla UWX440, Installation Manuallines

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9. Recommended suction line pipe size
The following chart gives the suction pipe size recommendations for 440 and 550 compressors.
These recommendations must be strictly adhered to ensure adequate refrigerant and oil flow back
to the compressor. An undersized suction line will cause a pressure drop between the evaporator
outlet and the compressor, and create poor refrigerant and oil flow at the compressor. Particularly at
high revs and low evaporator temperatures.
Unicla Suction Filter Insert
Part no: 43701-000290
Must be used in conjunction with
Unicla Suction Mesh Screen, and
must be removed after 2-12 hours
from initial commissioning. This is
ideal for removal of fine particles
from a new system.
Unicla Suction Mesh Screen
Part no: 43701-000270
Can be left in place in the suction
port to ensure continual removal
of heavier particles in the system,
however regular inspections of
this mesh screen must take place
to ensure a permanent blockage
does not occur.
10. Compressor speed
The following chart gives the Unicla
speed recommendation for UWX440
and UWX 550 compressors. This
should be strictly followed at all times.
11. In-line suction mesh screen and filter insert
The Unicla inline mesh screen and filter insert should be used whenever there is risk of debris and
fine particles entering the compressor through the suction line.
In the case of older systems where the compressor is replacing a previous failure, the system must be
flushed and the filter should be strictly monitored to ensure a blockage does not occur. More than
one filter maybe required over several hours to properly clean the particles in the suction line.
Rated Temp Press Pipe Size Temp Press Pipe Size Temp Press Pipe Size Temp Press Pipe Size Temp Press Pipe Size
RPM (kW) Diff Diff mm (inch) Diff Diff mm (inch) Diff Diff mm (inch) Diff Diff mm (inch) Diff Diff mm (inch
(K) (kpa) (K) (kpa) (K) (kpa) (K) (kpa) (K) (kpa)
1000 12.1 0.55 5.7 22 (7/8) 0.29 3 28 (1 1/8) 0.48 5 28 (1 1/8) 0.58 6 28 (1 1/8) 0.87 8.9 28 (1 1/8)
1500 18 029 3 28 (1 1/8) 0.58 6 28 (1 1/8) 0.98 10 28 (1 1/8) 0.41 4.2 35 (1 3/8) 0.61 6.3 35 (1 3/8)
2000 18 0.29 3 28 (1 1/8) 0.94 9.6 28 (1 1/8) 0.54 5.6 35 (1 3/8) 0.65 6.7 35 (1 3/8) 0.99 10.1 35 (1 3/8)
2500 26.7 0.64 6.5 28 (1 1/8) 0.44 4.5 35 (1 3/8) 0.74 7.6 35 (1 3/8) 0.89 9.1 35 (1 3/8) 0.56 5.7 41 (1 5/8)
Unicla 550 series 3m Pipe Length 6m Pipe Length 10m Pipe Length 12m Pipe Length 18m Pipe Length
Compressor
series
Ideal
operation
speed rpm
Maximum
continuous
rpm
Maximum
momentary
rpm
440/550 1200-2500 3000 4500
7.
Installation of mesh screen only
Installation of mesh screen and filter insert