Daikin LRYEN10A7Y1 Installation And Operation Manual page 6

2 Specific installer safety instructions
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 shocks.
▪ Install the required fuses or circuit breakers.
▪ Secure the electrical wiring with cable ties so that the
cables do NOT come in contact with sharp edges or
piping, particularly on the high-pressure side.
▪ Do NOT use taped wires, extension cords, or
connections from a star system. They can cause
overheating, electrical shocks or fire.
▪ Do NOT install a phase advancing capacitor, because
this unit is equipped with an inverter. A phase
advancing capacitor will reduce performance and may
cause accidents.
WARNING
ALWAYS use multicore cable for power supply cables.
CAUTION
This equipment is NOT intended for use in residential
locations and will NOT guarantee to provide adequate
protection to radio reception in such locations.
WARNING
Provide adequate measures to prevent that the unit can be
used as a shelter by small animals. Small animals that
make contact with electrical parts can cause malfunctions,
smoke or fire.
WARNING
▪ All wiring MUST be performed by an authorised
electrician and MUST comply with the applicable
national wiring regulation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on-site and all electrical
construction MUST
legislation.
WARNING
If the supply cord is damaged, it MUST be replaced by the
manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
INFORMATION
Details of type and rating of fuses, or rating of circuit
breakers are described in
Charging refrigerant (see "15 Charging
WARNING
Charging of refrigerant MUST be in accordance with the
instructions from this
refrigerant" [ 4 38].
Installation and operation manual
6
comply with the applicable
installation" [ 4 31].
"14 Electrical
refrigerant" [ 4 38])
manual. See "15 Charging
WARNING
▪ ONLY use R744 (CO
may cause explosions and accidents.
▪ When installing, charging refrigerant, maintaining or
performing service, ALWAYS use personal protective
equipment, such as safety shoes, safety gloves and
safety glasses.
▪ If the unit is installed indoors (for example, in a
machine room), ALWAYS use a portable CO
▪ If the front panel is open, ALWAYS beware of the
rotating fan. The fan will continue rotating for a while,
even after the power switch has been turned off.
WARNING
The unit is already filled with a certain amount of R744. Do
NOT open liquid and gas stop valves until all checks from
the "17.2 Checklist before
completed.
WARNING
After charging refrigerant, keep the power supply and
operation switch of the outdoor unit ON to avoid a pressure
increase on the low pressure (suction piping) side and to
avoid pressure increase on the pressure side of the liquid
receiver.
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.
CAUTION
Do NOT charge liquid refrigerant directly to a gas line.
Liquid compression could cause compressor operation
failure.
Configuration (see "16 Configuration" [ 4 39])
DANGER: RISK OF ELECTROCUTION
WARNING
If any part of system is already (accidentally) powered on,
setting [2-21] on the outdoor unit can be set to value 1 to
open the valves (Y1E, Y2E, Y7E, Y8E, Y13E, Y16E, Y17E,
Y11S~Y16S, Y21S~Y26S, Y31S~Y34S, Y44S).
Commisioning (see "17 Commissioning" [ 4 41])
WARNING
Commissioning method MUST be in accordance with the
instructions from
"17 Commissioning" [ 4 41].
CAUTION
Do NOT perform the test operation while working on
the indoor units.
When performing the test operation, NOT ONLY the
outdoor unit, but the connected indoor unit will operate as
well. Working on an indoor unit while performing a test
operation is dangerous.
CO₂ Conveni-Pack outdoor unit and capacity up unit
) as refrigerant. Other substances
2
detector.
2
commissioning" [ 4 42] are
this manual. See
LRYEN10A7Y1+LRNUN5A7Y1
4P605461-1D – 2023.08