Precautions When Connecting The Refrigerant Piping - Daikin FHA50AVEB98 User Reference Manual

17.2.2 Precautions when connecting the refrigerant piping

FHA-A(9)
Split system air conditioner
4P708119-1 – 2022.11
INFORMATION
Also read the precautions and requirements in the following chapters:
▪
"2 General safety
▪
"17.1 Preparing refrigerant
DANGER: RISK OF BURNING/SCALDING
NOTICE
▪
Do NOT use mineral oil on flared part.
▪
NEVER install a drier to this unit to guarantee its lifetime. The drying material may
dissolve and damage the system.
▪
Use the flare nut fixed to the main unit.
▪
To prevent gas leakage, apply refrigeration oil only to the inside of the flare. Use
refrigeration oil for R32/R410A.
▪
Do NOT reuse joints.
NOTICE
Take the following precautions on refrigerant piping into account:
▪
Avoid anything but the designated refrigerant to get mixed into the refrigerant
cycle (e.g. air).
▪
Only use R32 or R410A when adding refrigerant. Refer to the outdoor unit
specifications for the type of refrigerant to be used.
▪
Only use installation tools (e.g. manifold gauge set) that are exclusively used for
R32 or R410A installations to withstand the pressure and to prevent foreign
materials (e.g. mineral oils and moisture) from mixing into the system.
▪
Install the piping so that the flare is NOT subjected to mechanical stress.
▪
Do NOT leave pipes unattended at the site. If the installation is NOT done within 1
day, protect the piping as described in the following table to prevent dirt, liquid
or dust from entering the piping.
▪
Use caution when passing copper tubes through walls (see figure below).
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.
4
precautions" [ 7]
4
piping" [ 59]
Installation period
17 Piping installation
|
Protection method
Pinch the pipe
Pinch or tape the pipe
Installer and user reference guide
61