Vertiv™ | Liebert® SRC-G | User Manual
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Mechanical Installation
2.8.3. Connecting Refrigerant Piping
• The pipe should be installed and removed with care so that they will not get damaged. Use tube benders and
make all bends before connecting refrigerant piping of the indoor and the outdoor units.
• If brazing is required, all refrigerant piping should be connected with silver-brazed joints. The copper pipe is
filled with nitrogen gas during the brazing process to prevent oxidation of the copper piping.
• Prior to use, check piping supports, leakage testing, dehydration of refrigerant pipes and evacuation. Use
vibration isolating support to isolate the refrigeration piping from the building.
• Use a soft and flexible material to pack around the piping to protect them when sealing openings in walls and
to reduce vibration transmission.
• When installing the outdoor unit 5 m higher than the indoor unit, the trap should be installed on the gas pipe
(Oil trap). This trap will retain lubricant oil in the o cycle of the compressor. When the compressor starts, oil in
the trap will be carried up the vertical riser and return to the compressor immediately.
• If the piping equivalent length exceeds 30 m then ‘Long piping kit’ should be added.
• If the equivalent pipe length exceeds 60 m, please consult Vertiv local representative for details.
• Copper pipe with outer diameter of 16/13 mm, wall thickness requirement is 0.8 mm; copper pipe with outer
diameter of 10 mm, wall thickness requirement is 0.6 mm.
2.8.4. Pipe Connector Position
Figure 2-15 shows the pipe connector cutout locations of the indoor unit for indoor and outdoor
units respectively.
No. Description No. Description
1 Service valves 3 Liquid pipe
2 Drain water pipe 4 Suction (gas) pipe
Figure 2-15 Pipeline Connector Interface (Indoor Unit)
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