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Refrigerant piping procedures
piping design → Pipe flaring →piping connection(indoor/outdoor unit) → Evacuating →
Gas leakage test → Additional refrigerant charging
(if the length of connection piping is beyond standard length.)
Precautions for refrigerant piping
● Refrigerant piping design significantly affects the product's performance, and incorrect
piping may cause a failure.
1
Use the designated pipe diameter and thickness.
2
Select the shortest distance when arranging piping.
3
Fix the pipe supports securely.
4
For a vertical piping, install oil traps at intervals of 10m along the gas pipe.
5
The height difference between the indoor unit and the outdoor unit should be lower
as much as possible, and should not exceed the allowable range.
6
Take care in handling pipe and seal the end part of a pipe with a cap or tape to
prevent dust or moisture from entering the pipe.
7
If a pipe passes through a wall, each end of the pipe should be sealed.
8
When placing a pipe on the ground, do not let either end of the pipe come into
contact with the ground's surface.
9
Be sure the end of the pipe is pointed downward (toward the floor) when you
remove the burrs after machining a pipe.
10
Pay extra attention when performing piping work on a rainy day.
11
Do not install unnecessary traps to prevent
refrigerating oil or refrigerant in the suction gas pipes
from being stagnant. In addition, if climbing over
an axis such as a ceiling, do not install in the way
specified in the figure by a dotted line, which
may deteriorate the recovering of refrigerating oil in
case refrigerant amount is not enough.
Downward
Axis
gradient
Downward
gradient
s u c t i o n
gas piping
Installation Manual
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