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Installation Example
When installing next to a top-blow
refrigeration unit
300 mm or wider
Avoid direct entry of the blow-out heat into the heat
exchanger of the top-blow refrigeration unit.
Refrigerant Piping Work
Design and installation of the refrigerant piping work largely affect the performance of the refrigeration unit as well
as the product life and problem occurrence.
Installation work should comply with the following items. Installation of all equipment have to be in accordance to
Pressure directive 2014/68/EU and European norm EN 378 «In the European Market».
Or, Australian norm AS/NZS 5149 «In the Australian and New Zealand market».
Selection of Refrigerant Piping Size
The connection piping size for refrigeration unit is, in principle, as shown below, but each should be determined by
calculating pressure loss of the piping and refrigerant fl ow speed and making sure no problem occurs in the cooling
capacity and oil return.
As refrigeration unit using CO
choose adequate materials.
Model No.
OCU-CR200VF5(SL)
Note: Welding is inner diameter welding.
● Piping material should be seamless phosphorous-deoxidized copper pipes (refrigeration grade), K65.
● When cutting pipe, use a pipe cutter and always remove burrs.
● When bending pipe, secure a bending radius 4 times or greater of the outer diameter. During bending, pay attention
to distortion and scars.
● When the connection length of the suction line is 15 m or shorter, increase piping size by 1 rank for improving
startability of the refrigeration unit. To secure starting performance.
(Piping size of the suction line: Ø 9.52 mm → Ø 12.7 mm)
Use suffi cient caution for handling piping by sealing the pipe end with tape or any other cover for
Caution
avoiding entry of contaminants and moisture into the pipe.
500 mm or wider
refrigerant incurs pressure higher than when using HFC refrigerant, it is necessary to
2
Suction line (Unit inlet)
Ø9.52 mm, 3/8"
Side-by-side installation
Liquid line (Unit outlet)
Ø6.35 mm, 1/4"
EN - 17
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