17
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Piping installation
Installer and user reference guide
77
R R8T7V1B
VRV IV heat pump for indoor installation
4P499898-1A – 2020.10
17.2 Connecting the refrigerant piping
17.2.1 About connecting the refrigerant piping
Before connecting the refrigerant piping
Make sure the compressor unit, heat exchanger unit and indoor units are
mounted.
Typical workflow
Connecting the refrigerant piping involves:
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Connecting the refrigerant piping to the compressor unit
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Connecting the refrigerant piping to the heat exchanger 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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Brazing
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Using the stop valves
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Removing pinched pipes
17.2.2 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/SCALDING
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 R410A when adding refrigerant.
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Only use installation tools (e.g. manifold gauge set) that are exclusively used for
R410A 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 by pinching or taping the pipe ends to prevent dirt, liquid or
dust from entering the piping.
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Use caution when passing copper tubes through walls.
