Refrigerant Piping Insulation; Preparing Electrical Wiring; About Preparing Electrical Wiring - Daikin FCAHG71HVEB Installer And User Reference Manual

5 | Preparation
Refrigerant piping diameter
Refrigerant piping material

5.3.2 Refrigerant piping insulation

5.4 Preparing electrical wiring

5.4.1 About preparing electrical wiring

Installer and user reference guide
26
NOTICE
The piping and other pressure-containing parts shall be suitable for refrigerant. Use
phosphoric acid deoxidised seamless copper for refrigerant.
▪ Foreign materials inside pipes (including oils for fabrication) must be
≤30 mg/10 m.
Use the same diameters as the connections on the outdoor units:
L1 liquid piping
L1 gas piping
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Flare connections: Only use annealed material.
▪ Piping temper grade and thickness:
Outer diameter (Ø)
9.5 mm (3/8")
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
Ambient temperature
≤30°C
>30°C
INFORMATION
Also read the precautions and requirements in the
4
precautions" [
Ø9.5 mm
Ø15.9 mm
Temper grade
Annealed (O) ≥0.8 mm
Annealed (O) ≥1.0 mm
Humidity
75% to 80% RH
≥80% RH
5].
(a)
Thickness (t)
Minimum thickness
15 mm
20 mm
"1 General safety
FCAHG71~140HVEB
Split system air conditioners
4P561449-1B – 2021.07
Ø
t