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The Maximum Length And Drop
Height Based on Models. (Unit: m/ft.)
Type of model Capacity
(Btu/h)
Length of
piping
Maximum drop
height
North America,
Australia and the
eu frequency
conversion Split
Type
<15K 25/82 10/32.8
≥15K - <24K 30/98.4 20/65.6
≥24K - <36K 50/164 25/82
≥36K - ≤60K 65/213 30/98.4
Other Split Type
12K 15/49 8/26
18K-24K 25/82 15/49
30K-36K 30/98.4 20/65.6
42K-60K 50/164 30/98.4
Refrigerant Piping Connection
Safety Precautions
WARNING
• All field piping must be completed by a
licensed technician and must comply with
the local and naonal regulaons.
• When the air condioner is installed in a
small room, measures must be taken to
prevent the refrigerant concentraon in
the room from exceeding the safety limit
in the event of refrigerant leakage. If the
refrigerant leaks and its concentraon
exceeds its proper limit, hazards due to
lack of oxygen may result.
• When installing the refrigeraon system,
ensure that air, dust, moisture or foreign
substances do not enter the refrigerant
circuit. Contaminaon in the system may
cause poor operang capacity, high
pressure in the refrigeraon cycle,
explosion or injury.
• Venlate the area immediately if there is
refrigerant leakage during the installaon.
Leaked refrigerant gas is both toxic and
flammable. Ensure there is no refrigerant
leakage aer compleng the installaon
work.
Notes On Pipe Length and Elevation
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 following table:
Oil traps
CAUTION
If oil flows back into the outdoor unit’s
compressor, this might cause liquid compression
or deterioraon of oil return. Oil traps in the
rising gas piping can prevent this.
An oil trap should be installed every 20 (6m) of
vercal sucon line riser (＜36000Btu/h unit).
An oil trap should be installed every 32.8 (10m)
of vercal sucon line riser (≥36000Btu/h unit).
10m/32.8
(≥36000Btu/h unit)
20/6m
(＜36000Btu/h unit)
10m/32.8
(≥36000Btu/h unit)
20/6m
(＜36000Btu/h unit)
Indoor unit/
Outdoor unit
Indoor unit/
Outdoor unit
Refrigerant piping
Connection
Page 33
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