Refrigerant Piping Insulation - Daikin 3MXM40A2V1B9 Installer's Reference Manual

Refrigerant piping material

7.1.2 Refrigerant piping insulation

2MXM-A9, 3MXM-A9, 4MXM-A9, 5MXM-A9
R32 Split series
4P600463-7G – 2022.09
4MXM68
Liquid piping
Gas piping
4MXM80
Liquid piping
Gas piping
5MXM90
Liquid piping
Gas piping
INFORMATION
Usage of reducers might be required based on the indoor unit. See
"7.2.6 Connections between outdoor and indoor unit using
more information.
▪ Piping material: phosphoric acid deoxidised seamless copper
▪ Flare connections: Only use annealed material.
▪ Piping temper grade and thickness:
Outer diameter (Ø)
6.4 mm (1/4") Annealed (O)
9.5 mm (3/8")
12.7 mm (1/2")
15.9 mm (5/8")
(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.
▪ 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")
4× Ø6.4 mm (1/4")
2× Ø9.5 mm (3/8")
2× Ø12.7 mm (1/2")
4× Ø6.4 mm (1/4")
1× Ø9.5 mm (3/8")
1× Ø12.7 mm (1/2")
2× Ø15.9 mm (5/8")
5× Ø6.4 mm (1/4")
2× Ø9.5 mm (3/8")
1× Ø12.7 mm (1/2")
2× Ø15.9 mm (5/8")
Temper grade
≥0.8 mm
≥1 mm
) Insulation inner diameter
p
(Ø )
i
8~10 mm
10~14 mm
7 Piping installation
|
reducers" [
(a)
Thickness (t)
Insulation thickness (t)
≥10 mm
≥13 mm
Installer reference guide
4
38] for
Ø
t
33