Daikin FXFN50A2VEB Installer And User Reference Manual page 12

3 | Specific installer safety instructions
Installer and user reference guide
12
WARNING
When using safety shut-off valves, make sure to install measures such as a bypassing
piping with a pressure relief valve (from liquid pipe to gas pipe). When the safety
shut-off valves close and no measures are installed, increased pressure may damage
the liquid piping.
Refrigerant piping installation (see
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
▪
Use K65 piping for high-pressure applications with a working pressure of 120 bar
or 90 bar, depending on its location in the system.
▪
Use K65 unions and fittings approved for a working pressure of 120 bar or 90 bar,
depending on its location in the system.
▪
ONLY brazing is allowed for connection of pipes. No other types of connections
are allowed.
▪
Expanding of pipes is NOT allowed.
Electrical installation (see
WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
▪
All wiring MUST be performed by an authorised electrician and MUST comply
with the applicable legislation.
▪
Make electrical connections to the fixed wiring.
▪
All components procured on-site and all electrical construction MUST comply
with the applicable legislation.
WARNING
▪
If the power supply has a missing or wrong N-phase, equipment might break
down.
▪
Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber,
or telephone earth. Incomplete earthing may cause electrical shock.
▪
Install the required fuses or circuit breakers.
▪
Secure the electrical wiring with cable ties so that the cables do NOT come into
contact with sharp edges or piping, particularly on the high-pressure side.
▪
Do NOT use taped wires, stranded conductor wires, extension cords, or
connections from a star system. They can cause overheating, electrical shock or
fire.
WARNING
Use an all-pole disconnection type breaker with at least 3 mm between the contact
point gaps that provide full disconnection under overvoltage category III.
"17 Piping installation" [
"18 Electrical installation" [
4
61])
4
66])
FXFN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P677925-1 – 2021.07