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Refrigerant Piping Connection
Saf et y Precaut ions
WARNING
• All eld piping must be completed by a
licensed technician and must comply with
the local and national regulations.
• When the air conditioner is installed in a
small room, measures must be taken to
prevent the refrigerant concentration in
the room from exceeding the safety limit
in the event of refrigerant leakage. If the
refrigerant leaks and its concentration
exceeds its proper limit, hazards due to
lack of oxygen may result.
• When installing the refrigeration system,
ensure that air, dust, moisture or foreign
substances do not enter the refrigerant
circuit. Contamination in the system may
cause poor operating capacity, high pressure
in the refrigeration cycle, explosion or injury.
• Ventilate the area immediately if there is
refrigerant leakage during the installation.
Leaked refrigerant gas is both toxic and
ammable. Ensure there is no refrigerant
leakage after completing the installation
work.
Not es On Pipe Lengt h and Elevat ion
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:
The M aximum Lengt h And Drop
Height Based on M odels. (Unit : m/ f t .)
Type of model
Capacit y
(Bt u/ h)
<15K
North America,
Australia and the
≥15K - <24K
eu frequency
≥24K - <36K
conversion Split
Type
≥36K - ≤60K
12K
18K-24K
Other Split Type
30K-36K
42K-60K
www.hvacmirage.us
Lengt h of
M aximum drop
piping
height
25/82
10/32.8
30/98.4
20/65.6
50/164
25/82
65/213
30/98.4
15/49
8/26
25/82
15/49
30/98.4
20/65.6
50/164
30/98.4
CAUTION
Oil traps
If oil flows 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 6m(20ft) of
vertical suction line riser (＜36000Btu/h unit).
An oil trap should be installed every 10m(32.8ft)
of vertical suction line riser (≥36000Btu/h unit).
Indoor unit/
Outdoor unit
Indoor unit/
Outdoor unit
6m/20ft
(＜36000Btu/h unit)
10m/32.8ft
(≥36000Btu/h unit)
6m/20ft
(＜36000Btu/h unit)
10m/32.8ft
(≥36000Btu/h unit)
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