Refrigerant Piping Insulation; Refrigerant Piping Length And Height Difference - Daikin 2AMXM40M4V1B9 Installer's Reference Manual

7 | Piping installation

7.1.2 Refrigerant piping insulation

7.1.3 Refrigerant piping length and height difference

Installer reference guide
34
(a)
Depending on the applicable legislation and the maximum working pressure of the unit
(see "PS High" on the unit name plate), larger piping thickness might be required.
Usage of reducers might be required based on the indoor unit. See
"7.2.6 Connections between outdoor and indoor unit using
more information.
▪ Use polyethylene foam as insulation material:
- with a heat transfer rate between 0.041 and 0.052 W/mK (0.035 and
0.045 kcal/mh°C)
- with a heat resistance of at least 120°C
▪ Insulation thickness
Pipe outer diameter (Ø
6.4 mm (1/4")
9.5 mm (3/8")
12.7 mm (1/2")
Ø Ø
i i
Ø Ø
p p
t
If the temperature is higher than 30°C and the humidity is higher than RH 80%, the
thickness of the insulation materials should be at least 20 mm to prevent
condensation on the surface of the insulation.
The shorter the refrigerant piping, the better the performance of the system.
The piping length and height differences must comply with the following
requirements.
Model
Class 40
Class 50
Shortest allowable length per room is 3 m.
Refrigerant piping length to each indoor unit
Refrigerant piping total length
Outdoor unit installed
higher than indoor unit
Outdoor unit installed
lower than at least 1
indoor unit
) Insulation inner diameter
p
(Ø )
i
8~10 mm
12~15 mm
14~16 mm
Height difference
outdoor-indoor
≤15 m
≤7.5 m
reducers" [
Insulation thickness (t)
≥10 mm
≥13 mm
≥13 mm
Minimum required space
2
1.2 m
2
1.8 m
≤20 m
≤30 m
Height difference indoor-
indoor
≤7.5 m
≤15 m
2(A)MXM40+50 + 2(A)MXF40+50
4P600463-3D – 2021.03
4
38] for
R32 Split series