Daikin FXFN50A2VEB Installer And User Reference Manual page 8

2 | General safety precautions
Installer and user reference guide
8
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:
▪
Carbon dioxide poisoning
▪
Asphyxiation
NOTICE
After all the piping has been connected, make sure there is no gas leak. Use nitrogen
to perform a gas leak detection.
NOTICE
▪
To avoid compressor breakdown, do NOT charge more than the specified amount
of refrigerant.
▪
When the refrigerant system is to be opened, refrigerant MUST be treated
according to the applicable legislation.
WARNING
Make sure there is no oxygen in the system. Refrigerant may ONLY be charged after
performing the leak test and the vacuum drying.
Possible consequence: Self-combustion and explosion of the compressor because of
oxygen going into the operating compressor.
CAUTION
A vacuumed system will be under triple point. To avoid solid ice, ALWAYS start
charging with R744 in vapour state. When the triple point is reached (5.2 bar
absolute pressure or 4.2 bar gauge pressure), you may continue charging with R744
in liquid state.
▪ In case recharge is required, see the nameplate of the unit. It states the type of
refrigerant and necessary amount.
▪ The unit is factory charged with refrigerant and depending on pipe sizes and pipe
lengths some systems require additional charging of refrigerant.
▪ Only use R744 (CO ) as refrigerant. Other substances may cause explosions and
2
accidents.
▪ Do NOT charge liquid refrigerant directly from a gas line. Liquid compression
could cause compressor operation failure.
▪ Only use tools exclusively for the refrigerant type used in the system, this to
ensure pressure resistance and prevent foreign materials from entering into the
system.
▪ Open refrigerant cylinders slowly.
FXFN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P677925-1 – 2021.07