Installation Manual

Refrigerant Piping
Connection
 
Refrigerant Piping Connection
Flare nut
Copper pipe
When connecting refrigerant piping, do not
let substances or gases other than the specied
refrigerant enter the unit. The presence of other
gases or substances will lower the unit’s capacity,
and can cause abnormally high pressure in the
refrigeration cycle. This can cause explosion and
injury.
Step 1: Cut pipes
When preparing refrigerant pipes, take extra
care to cut and flare them properly. This will
ensure efficient operation and minimize the
need for future maintenance.
1. Measure the distance between the indoor
and outdoor units.
CAUTION
• The branching pipe must be installed
horizontally. An angle of more than 10° may
cause malfunction.
• DO NOT install the connecting pipe until
both indoor and outdoor units have been
installed.
• Insulate both the gas and liquid piping to
prevent water leakage.
Connection Instructions –
Refrigerant Piping
2.
Using a pipe cutter, cut the pipe a little longer
than the measured distance.
3. Make sure that the pipe is cut at a perfect 90°
angle.
DO NOT DEFORM PIPE
WHILE CUTTING
Be extra careful not to damage, dent, or deform
the pipe while cutting. This will drastically reduce
the heating eciency of the unit.
Step 3: Flare pipe ends
Proper aring is essential to achieve an airtight
seal.
1. After removing burrs from cut pipe, seal
the ends with PVC tape to prevent foreign
materials from entering the pipe.
2. Sheath the pipe with insulating material.
3. Place are nuts on both ends of pipe.
Make sure they are facing in the right
direction, because you can’t put them on
or change their direction after flaring.
Step 2: Remove burrs.
Burrs can aect the air-tight seal of refrigerant
piping connection. They 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 down
Oblique Rough Warped
90°
NOTE: For quick-connect models, please
refer to the internal machine manual for the
installation method of the connecting pipe.
The external machine manual does not
repeat the instructions.