Daikin VRV 5-S - Page 15

3 | Specific installer safety instructions
Installer and user reference guide
15
RXYSA8~12AMY1B
VRV 5-S system air conditioner
4P752782-1A – 2024.02
Connecting the refrigerant piping (see
"18.2Connecting the refrigerant
piping"[
4
94]
)
WARNING
Field piping MUST be in accordance with the instructions from this manual. See
"18Piping installation"[487].
CAUTION
Piping MUST be installed according to instructions given in "18 Piping
installation" [4 87]. Only mechanical joints (e.g. braze+flare connections) that are
compliant with the latest version of ISO14903 can be used.
Low temperature solder alloys shall not be used for pipe connections.
CAUTION
▪ Do NOT use mineral oil on flared part.
▪ Do NOT reuse piping from previous installations.
▪ NEVER install a drier to this unit to guarantee its lifetime. The drying material may
dissolve and damage the system.
CAUTION
Install the refrigerant piping or components in a position where they are unlikely to
be exposed to any substance which may corrode components containing refrigerant,
unless the components are constructed of materials that are inherently resistant to
corrosion or are suitably protected against corrosion.
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.
WARNING
During tests, NEVER pressurise the product with a pressure higher than the
maximum allowable pressure (as indicated on the nameplate of the unit).
CAUTION
Do NOT vent gases into the atmosphere.
WARNING
Any gas or oil remaining inside the stop valve may blow off the pinched piping.
Failure to observe the instructions in procedure below properly may result in
property damage or personal injury, which may be serious depending on the
circumstances.