65
10. Installation
Refrigerant pipe installation
Classification Model name of
indoor unit
Number
of units
Unit amount of
refrigerant (kg/EA)
Amount of additional
refrigerant (kg)
Total amount of
additional refrigerant (kg)
①
②
①
×
②
∑(
①
×
②
)
Indoor unit
(
ⓑ
)
4way cassette
(
AM071FN4DEH
✴
)
5
0.45
2.25
ⓑ
4.66
4way cassette
(
AM112FN4DEH
✴
)
2
0.57
1.14
Neo forte
(
AM028FNTDEH
✴
)
1
0.27
0.27
MCU
2
0.5
1
-Total amount of refrigerant (
ⓐ
+
ⓑ
) = 11.965+4.66 = 16.625 (kg)
Temper grade and minimum thickness of the refrigerant pipe
Outer diameter (mm)
Minimum thickness (mm)
Temper grade
Ø 6.35
0.70
Annealed
Ø 9.52
0.70
Ø 12.70
0.80
Ø 15.88
1.00
Ø 19.05
0.90
Drawn
Ø 22.22
0.90
Ø 25.40
1.00
Ø 28.58
1.10
Ø 31.75
1.10
Ø 34.92
1.21
Ø 38.10
1.35
Ø 41.28
1.43
Ø 44.45
1.60
Ø 50.80
2.00
Ø 53.98
2.10
• For pipes larger than Ø 19.05, drawn type (C1220T-1/2H or C1220T-H) type copper pipe must be used. If a
annealed type (C1220T-O) copper pipe is used, pipe may break due to its low pressure resistance and cause
personal injury.
CAUTION
