18
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Piping installation
Installer and user reference guide
81
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600330-1 – 2020.01
1~8
VRV DX indoor units
18.2 Connecting the refrigerant piping
18.2.1 About connecting the refrigerant piping
Before connecting the refrigerant piping
Make sure the outdoor and indoor units are mounted.
Typical workflow
Connecting the refrigerant piping involves:
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Connecting the refrigerant piping to the outdoor unit
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Connecting refrigerant branch kits
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Connecting the refrigerant piping to the indoor units (see the installation manual
of the indoor units)
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Insulating the refrigerant piping
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Keeping in mind the guidelines for:
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Pipe bending
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Flaring pipe ends
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Brazing
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Using the stop valves
18.2.2 Precautions when connecting the refrigerant piping
INFORMATION
Also read the precautions and requirements in the following chapters:
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General safety precautions
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Preparation
DANGER: RISK OF BURNING
CAUTION
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:
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Avoid anything but the designated refrigerant to get mixed into the refrigerant
cycle (e.g. air).
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Only use R32 when adding refrigerant.
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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.
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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.
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