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3.2 Refrigerant circuit
3.2.1 General notes R32 refrigerant
This appliance is filed with R32, an odourless flmmable refrigerant gas with low burning velocity (A2L class pursuant to
ISO 817). If the refrigerant is leaked, there is a possibility of ignition if it enters in contact with an external ignition source.
Make sure that unit installation and refrigerant piping installation comply with applicable legislation in each country. Also, in
Europe, EN378 must be complied, as it is the applicable standard.
3.2.2 Refrigerant piping
Refrigerant piping length between indoor unit and outdoor unit
NOTE: For specific installation guidelines, please refer to the Outdoor unit <Owner's Manual & Installation Manual>.
Refrigerant piping size
Piping connection size of outdoor unit and indoor unit
Outdoor unit
Model
M4OA-27HFN8-Q(HRU)
The unit installation and refrigerant piping should comply with the relevant local and national regulations for the designed refrigerant.
Due to R32 refrigerant and depending on fial refrigerant charge amount, a minimum flor area for installation must be
considered. If total refrigerant charge amount <1.84kg, there are no additional minimum flor area requirements.
Minimum area requirements
In case of total refrigerant amount ≥1.84 kg, the unit should be installed, operated and stored in a room with a flor area larger than the
minimum criteria. Use following graphic and table to determine these minimum criteria:
Refrigerant
Amount (kg)
1.84
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
NOTE: In case of not achieving the minimum flor area, contact with your dealer.
3.2.3
Refrigerant charge
Refrigerant charge amount
Please refer to the installation and operation manual of the outdoor unit for the refrigerant filling quantity.
Pipe size
Gas pipe
Liquid pipe
Ø9.52 (3/8")
Ø 6.35 (1/4")
Minimum Area
(m
) (H:2.2m)
2
28.81
30.72
34.09
37.50
41.36
45.00
49.09
53.18
57.73
61.82
66.82
71.36
Model
PLSX-190(30)/DN8-A
100
90
80
70
60
50
40
30
20
10
0
1.8
1.9
2.0
2.1
2.2
Total refrigerant amount in the system (kg)
10
Indoor unit
Pipe size
Gas pipe
Liquid pipe
Ø9.52 (3/8")
Ø 6.35 (1/4")
2.3
2.4
2.5
2.6
2.7
2.8
2.9
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