Guidelines When Connecting The Refrigerant Piping; Pipe Bending Guidelines - Daikin Altherma 3 R MT F Series Installer's Reference Manual

8.2.3 Guidelines when connecting the refrigerant piping

8.2.4 Pipe bending guidelines

ERRA08~12E + ELVZ12S18+23E
Daikin Altherma 3 R MT F
4P708478-1 – 2023.05
Unit
Outdoor unit >1 month
<1 month
Indoor unit Regardless of the period
NOTICE
Do NOT open the refrigerant stop valve before checking the refrigerant piping. When
you need to charge additional refrigerant it is recommended to open the refrigerant
stop valve after charging.
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
Ø15.9
Use a pipe bender for bending. All pipe bends should be as gentle as possible
(bending radius should be 30~40 mm or larger).
Installation period
Flare dimensions
(N•m) (A) (mm)
11~14 8.7~9.1
62~75 19.3~19.7
8 Piping installation
|
Protection method
Pinch the pipe
Pinch or tape the pipe
Flare shape (mm)
90°
±2
ØA
R=
0.4~0.8
Installer reference guide
85