Daikin RYYQ8U7Y1B, Installer And User Manual

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17 | Piping installation
Installer and user reference guide
83
RYYQ+RYMQ+RXYQ
VRV IV+ heat pump
4P546228-1C – 2021.11
▪ Protecting the outdoor unit against contamination
▪ Connecting the refrigerant piping to the indoor units (see the installation manual
of the indoor units)
▪ Connecting the multi-connection piping kit
▪ Connecting the refrigerant branching kit
▪ Keeping in mind the guidelines for:
- Brazing
- Using the stop valves
- Removing the pinched pipes
17.2.2 Precautions when connecting the refrigerant piping
NOTICE
Make sure refrigerant piping installation complies with applicable legislation. In
Europe, EN378 is the applicable standard.
NOTICE
Make sure the field piping and connections are NOT subjected to stress.
WARNING
During tests, NEVER pressurise the product with a pressure higher than the
maximum allowable pressure (as indicated on the nameplate of the unit).
WARNING
Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks,
ventilate the area immediately. Possible risks:
▪
Excessive refrigerant concentrations in a closed room can lead to oxygen
deficiency.
▪
Toxic gas might be produced if refrigerant gas comes into contact with fire.
WARNING
ALWAYS recover the refrigerant. Do NOT release them directly into the environment.
Use a vacuum pump to evacuate the installation.
▪ Only use phosphoric acid deoxidised seamless copper.
NOTICE
After all the piping has been connected, make sure there is no gas leak. Use nitrogen
to perform a gas leak detection.