Daikin LRYEN10A7Y1 Installation And Operation Manual page 5

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
In case of mechanical ventilation, take care the ventilated
air is exhausted to the outdoor space and NOT into
another closed area.
WARNING
Install the unit ONLY in locations where the doors of the
occupied space are NOT tight fitting.
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.
WARNING
Fixing method of the outdoor unit MUST be in accordance
with the instructions from this manual. See
unit" [ 4 19].
the outdoor
Piping installation (see "13 Piping
DANGER: RISK OF BURNING/SCALDING
WARNING
The field piping method MUST be in accordance with the
instructions from this
installation" [ 4 20].
WARNING
The unit is partially factory charged with refrigerant R744.
WARNING
When stop valves are closed during service, the pressure
of the closed circuit will increase due to high ambient
temperature. Make sure the pressure is kept below the
design pressure.
WARNING
Any gas or oil remaining inside the stop valve may blow off
the spun piping.
If these instructions are NOT followed correctly it may
result in property damage or personal injury, which may be
serious depending on the circumstances.
WARNING
NEVER remove the spun piping by brazing.
Any gas or oil remaining inside the stop valve may blow off
the spun piping.
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1D – 2023.08
"12.3 Mounting
installation" [ 4 20])
manual. See "13 Piping
2 Specific installer safety instructions
WARNING
ONLY connect the outdoor unit to showcases or blower
coils with a design pressure:
▪ At the high pressure side (liquid side) of 90 bar gauge.
▪ At the low pressure side (gas side) of 60 bar gauge (is
possible with safety valve at field gas piping).
WARNING
Before putting the system into service, check if all field
supplied components or indoor units complies with
pressure test specifications of EN378-2. If you are not
sure, it is recommended to perform the test below.
CAUTION
ALWAYS use K65 T-joints for refrigerant branching.
WARNING
Serious injury and/or damage can result from the blow-off
of the liquid receiver safety valve (see
unit" [ 4 48]):
diagram: Outdoor
▪ NEVER service the unit when the pressure at the liquid
receiver is higher than 86 bar gauge. If the safety valve
releases refrigerant, it can cause serious injury and/or
damage. The safety valve is installed to protect the
liquid receiver. The set pressure of the liquid receiver
safety valve can
86 bar gauge ±3%, depending on the safety valve
present in your unit. Confirm the set pressure by
checking the safety valve body.
▪ If the pressure > set pressure, ALWAYS discharge
from pressure relief devices before servicing.
▪ It is recommended to install and secure blow-off piping
to the safety valve.
▪ ONLY alter the safety valve if the refrigerant has been
removed.
WARNING
All installed safety valves MUST ventilate to the outdoor
space and NOT into a closed area.
CAUTION
When installing a safety valve, ALWAYS add enough
support to the valve. An activated safety valve is under
high pressure. If not installed securely, the safety valve
may cause damage to the piping or the unit.
CAUTION
Do NOT open the stop valve until you have measured the
insulation resistance of the main power supply circuit.
CAUTION
ALWAYS use nitrogen gas for leak tests.
Electrical installation (see "14 Electrical
DANGER: RISK OF ELECTROCUTION
WARNING
Electrical wiring connection
accordance with the instructions from:
▪ This manual. See "14 Electrical
▪ The wiring diagram of the outdoor unit, which is
delivered with the unit, located on the inside of the top
plate. For a translation of its legend, see
unit" [ 4 52].
diagram: Outdoor
"19.1 Piping
be 90 bar gauge ±3% or
installation" [ 4 31])
method MUST be in
installation" [ 4 31].
"19.3 Wiring
Installation and operation manual
5