6
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Installation
Installer and user reference guide
36
FCAG35~140BVEB
Split system air conditioners
4P561448-1B – 2021.07
6.3.2 Precautions when connecting the refrigerant piping
INFORMATION
Also read the precautions and requirements in the following chapters:
▪
General safety precautions
▪
Preparation
DANGER: RISK OF BURNING/SCALDING
CAUTION
▪
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.
CAUTION
▪
Do NOT use mineral oil on flared part.
▪
NEVER install a drier to this R32 unit to guarantee its lifetime. The drying material
may dissolve and damage the system.
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.
▪
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
Installation period
Protection method
Outdoor unit
>1 month
Pinch the pipe
<1 month
Pinch or tape the pipe
Indoor unit
Regardless of the period
