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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.
Notes on pipe length and elevation
Model
6K/9K/12K
18K
Ensure that the length of the refrigerant pipe, the number of bends, and the drop height between the
indoor and outdoor units meets the requirements shown in the table next to it：
CAUTION
Oil traps
If oil ows back into the outdoor unit's
compressor, this might cause liquid
compression or deterioration of oil return.
Oil traps in the rising gas piping can
prevent this.
An oil trap should be installed every
20ft(6m) of vertical suction line riser
(＜36K). An oil trap should be
installed every 32.8ft(10m) of vertical
suction line riser (≥36K).
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The maximum length and drop height based on models.
Length of piping
82ft/25m
98.4ft/30m
Gas piping
Oil trap
Indoor unit/
Outdoor unit
24
Maximum drop height
49.2ft/15m
65.6ft/20m
Indoor unit/
Outdoor unit
20ft/6m
(<36K)
32.8ft/10m
Liquid
(≥36K)
piping
20ft/6m
(<36K)
32.8ft/10m
(≥36K)
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