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Multi-Zone Outdoor Condenser Installation Manual

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REFRIGERANT PIPE CONNECTION INSTRUCTIONS
STEP 1: CUT PIPES
When preparing refrigerant pipes, take extra care to cut and flare them properly. This will ensure
efficient operation and minimize leaks and the need for future maintenance.
1. Measure the distance between the indoor and outdoor units.
2. Using a pipe cutter, cut the pipe length a little longer than the measured distance.
3. Make sure that the pipe is cut at a perfect 90 angle.
4. Do not damage, deform, or dent the pipe while cutting.
STEP 2: REMOVE BURRS
Burrs can affect the airtight seal of the refrigerant piping connection and must be completely
removed.
1. Hold the pipe at a downward angle to prevent burrs from falling into the pipe.
2. Using a reamer or deburring tool, remove all burrs from the cut section of the pipe.
Pipe
Reamer
Point downward
If the indoor unit is installed higher than the outdoor unit:
Oil may flow back into the outdoor unit's compressor and cause liquid compression. This will lead
to deterioration of performance and shorten the life of the compressor. Oil traps in the rising gas
piping can prevent this and should be installed every 32'10" (10m) of vertical rise.
If the outdoor unit is installed higher than the indoor unit:
Proper oil return to the compressor must be maintained with the suction gas velocity. If velocities
drop below 1500fpm, oil return will be decreased and lead to deterioration of performance and
shorten the life of the compressor. Oil traps in the rising gas piping can prevent this and should be
installed every 19'9" (6m) of vertical rise.