10
3.2 Refrigerant circuit
3.2.1 General notes R32 refrigerant
3.2.2 Refrigerant piping
This appliance is filed with R32, an odourless flammable 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.
Refrigerant piping length between indoor unit and outdoor unit
Refrigerant piping size
Piping connection size of outdoor unit and indoor unit
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 floor area for installation must be
considered. If total refrigerant charge amount <1.84kg, there are no additional minimum floor area requirements.
In case of total refrigerant amount ≥1.84 kg, the unit should be installed, operated and stored in a room with a floor area larger than the
minimum criteria. Use following graphic and table to determine these minimum criteria:
NOTE: In case of not achieving the minimum floor area, contact with your dealer.
Outdoor unit
Indoor unit
Model
Pipe size
Model
Pipe size
Gas pipe
Liquid pipe
Gas pipe
Liquid pipe
Ø9.52 (3/8")
Ø 6.35 (1/4”)
Ø9.52 (3/8")
Ø 6.35 (1/4”)
Minimum area requirements
Refrigerant
Amount (kg)
Minimum Area
(m
2
) (H:2.2m)
1.84
28.81
1.9
30.72
2.0
34.09
2.1
37.50
2.2
41.36
2.3
45.00
2.4
49.09
2.5
53.18
2.6
57.73
2.7
61.82
2.8
66.82
2.9
71.36
Minimum room area for
installation (m
2
)
0
10
20
30
40
50
60
70
80
90
100
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
Total refrigerant amount in the system (kg)
Refrigerant charge amount
Please refer to the installation and operation manual of the outdoor unit for the refrigerant filling quantity.
3.2.3 Refrigerant charge
NOTE: For specific installation guidelines, please refer to the Outdoor unit <Owner’s Manual & Installation Manual>.
KTHR-190
KAM4HR-80 DR8
