Connecting The Refrigerant Piping; Guidelines When Connecting The Refrigerant Piping; To Connect The Refrigerant Piping To The Indoor Unit - Daikin FTXD35A5V1B Installer's Reference Manual

7.2 Connecting the refrigerant piping

7.2.1 Guidelines when connecting the refrigerant piping

7.2.2 To connect the refrigerant piping to the indoor unit

FTXD25+35A5V1B
Split system air conditioners
4P715853-3B – 2024.05
▪ Insulation thickness:
Pipe outer diameter (Ø
6.4 mm (1/4")
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.
Take the following guidelines into account when connecting pipes:
▪ Coat the flare inner surface with ether oil or ester oil when connecting a flare
nut. Tighten 3 or 4 turns by hand, before tightening firmly.
▪ ALWAYS use 2 wrenches together when loosening a flare nut.
▪ ALWAYS use a spanner and torque wrench together to tighten the flare nut when
connecting the piping. This to prevent nut cracking and leaks.
a b
c
d
a Torque wrench
b Spanner
c Piping union
d Flare nut
Piping size (mm) Tightening torque
Ø6.4
Ø9.5
Ø12.7
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
▪ Pipe length. Keep refrigerant piping as short as possible.
1 Connect refrigerant piping to the unit using flare connections.
) Insulation inner diameter
p
(Ø )
i
8~10 mm
Flare dimensions
(N•m) (A) (mm)
15~17 8.7~9.1
33~39 12.8~13.2
50~60 16.2~16.6
7 Piping installation
|
Insulation thickness (t)
≥10 mm
Flare shape (mm)
90°
±2
ØA
R=
0.4~0.8
Installer reference guide
33