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Refrigerant Piping Connection
Safet� Precautions
Â,.WARNING
• AII field 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. lf 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
flammable. Ensure there is no refrigerant
leakage after completing the installation
work.
Refrigerant Piping with Twin lndoor Units
When installing multi pie indoor units with a single outdoor unit, ensure that the length of the
refrigerant pipe and the drop height between the indoor and outdoor units meet the requirements
illustrated in the following diagram:
The drop height
between indoor
unit
and outdoor unit
must be less
than or equal to
20m (65.6')
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 Table 7.1:
Outdoor unit
H2
Fig. 7.1
18
0
Notes On Pipe Length and Elevation
Table 7 .1: The Maximum Length And Drop
Height Based on Models. (Unit: m/ft.)
Type of model
Capacity
(Btu/h}
35
North America,
Australia and the
:?:52- <71
eu frequency
:?:71 - <105
conversion Split
Type
:?:105 -:S:170
35
52-71
Other Split Type
105-125
140-170
lndoor unit
Ll
The drop height
between two
indoor units
Hl
must be less
L2
than or equal to
50cm (19.6")
lndoor unit
Length of
Maximum 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
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