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Page 27
9. Refrigerant Piping Connection
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.
Note on Pipe Length
The length of refrigerant piping will affect the performance and energy efciency of the unit. Nominal efciency is tested
on units with a pipe length of 5 meters. A minimum pipe run of 3 meters is requires to minimise vibration & excessive
noise.
Refer to the table below for specications on the maximum length and drop height of piping.
Model Capacity (Btu/h) Max. Length (m.) Max. Drop Height (m.)
R-32 Refrigerant Split Air
<15 000 25 10
≥ 15,000 and < 24,000 30 20
24 000 y < 36 000 50) 25
R-32 Fixed-speed Split Air
<18 000 20 8
≥ 18,000 and < 36,000 25 10
Connection Instructions - Refrigerant
Piping
Step 1: Cut pipes
When preparing refrigerant pipes, take extra care to cut
and are them properly. This will ensure efcient operation
and minimize the need for future maintenance.
1. Measure the distance between the indoor and outdoor
units.
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 90º 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
efciency of the unit.
Step 2: Remove burrs
Burrs can affect 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.
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 aring. PVC de
los extremos del tubo.
27


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