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Refrigerant Piping Connection
Safety Precautions
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
flammable. Ensure there is no refrigerant
leakage after completing the installation
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 Table 6.1:
Table 6.1: The Maximum Length And Drop
Height Based on Models. (Unit: m/ft.)
Type of model
North America,
Australia and the
eu frequency
conversion Split
Type
Other Split Type
CAUTION
Oil traps
•
If the indoor unit is installed higher than
the outdoor unit:
-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) or 10m (32.8ft) of vertical suction
line riser. (See Fig. 6.1)
Fig. 6.1
The indoor unit is installed higher than the
outdoor unit
Capacity
Length of
piping
(Btu/h)
<15K
25/82
≥15K - <24K
30/98.4
≥24K - <36K
50/164
≥36K - ≤60K
75/246
12K
15/49
18K-24K
25/82
30K-36K
30/98.4
42K-60K
50/164
6
Maximum drop
height
10/32.8
20/65.6
25/82
30/98.4
8/26
15/49
20/65.6
30/98.4
6m/20ft
(＜36000Btu/h unit)
10m/32.8ft
(=>36000Btu/h unit)
6m/20ft
(＜36000Btu/h unit)
10m/32.8ft
(=>36000Btu/h unit)
ƒPage 23
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