Daikin VRV 5 - Precautions When Connecting the Refrigerant Piping

18 | Piping installation
Installer and user reference guide
95
RXYSA8~12AMY1B
VRV 5-S system air conditioner
4P752782-1A – 2024.02
Typical workflow
Connecting the refrigerant piping involves:
▪ Connecting the refrigerant piping to the outdoor unit
▪ Connecting refrigerant branch kits
▪ Connecting the refrigerant piping to the indoor units (see the installation manual
of the indoor units)
▪ Insulating the refrigerant piping
▪ Keeping in mind the guidelines for:
- Pipe bending
- Brazing
- Using the stop valves
- Removing pinched pipes
18.2.2 Precautions when connecting the refrigerant piping
INFORMATION
Also read the precautions and requirements in the following chapters:
▪ "2General safety precautions"[48]
▪ "18.1Preparing refrigerant piping"[487]
DANGER: RISK OF BURNING/SCALDING
NOTICE
NEVER install a drier to this 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 when adding refrigerant.
▪ Only use installation tools (e.g. manifold gauge set) that are exclusively used for
R32 installations to withstand the pressure and to prevent foreign materials (e.g.
mineral oils and moisture) from mixing into the system.
▪ 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.
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