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Side connection
1 Remove the knockout on the bottom plate.
a
b
c
a
Drill (Ø6 mm)
b
Knockout plate
c
Drill here
2 Connect the piping to the outdoor unit.
A
B
b
a
A
Stop valve (gas – refrigeration)
B
Stop valve (liquid – refrigeration)
a
Gas piping
b
Liquid piping
3 If applicable, connect the piping to the capacity up unit.
13.3.3
Guidelines to connect T-joints
INFORMATION
Piping joints and fittings shall comply with the requirements
of EN 14276-2.
CAUTION
ALWAYS use K65 T-joints for refrigerant branching.
K65 T-joints are field supplied.
Liquid piping
Always branch horizontally when connecting the branch piping.
To prevent uneven refrigerant flow, always branch downwards when
using a header.
b
a
a
a
Coming from the outdoor units
b
Going to the indoor units
Gas piping
Always branch horizontally when connecting the branch piping.
To prevent refrigerant oil flowing into the indoor units, always set the
branch piping above the main piping.
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1B – 2020.08
4×
b
a
c
b
a
Coming from the indoor units
b
Going to the outdoor units
c
Main refrigerant pipe
d
Slanting downwards
NOTICE
Where joints are used on piping, avoid damage caused by
freezing or vibration.
13.3.4
Guidelines to install a dryer
NOTICE
Do NOT operate the unit without a dryer installed on the
liquid
pipe
of
the
consequence: Without dryer, operating the unit may
cause a choked expansion valve, hydrolysis of the
refrigerant oil and copper plating of the compressor.
Install a dryer on the liquid piping of the refrigeration side:
Dryer type
Drops of R744 water capacity at 60°C: 200
Recommended dryer for use with transcritical
CO
:
2
For LRYEN10*: CO-085-S (by Sporlan)
Where/how
Install the dryer as near as possible to the
outdoor unit.
Install the dryer on the liquid pipe of the
refrigeration side.
Install the dryer horizontally.
When brazing
Follow the brazing instructions in the dryer
manual.
Remove the dryer cap immediately before
brazing (to prevent absorption of moisture).
If dryer paint burnt during brazing, repair it. For
repair paint details, contact the manufacturer.
Flow direction
If the dryer specifies a flow direction, install
accordingly.
(a)
Follow the instructions in the installation manual of the dryer.
13.3.5
Guidelines to install safety valves
When installing a safety valve, always keep the design pressure of
the circuit in mind. See
"5.2 Design
NOTICE
The design pressure of high pressure side of the
connected refrigeration parts MUST be 9 MPa (90 bar).
NOTICE
If the design pressure of the lower pressure side of
refrigeration parts is different from 90 bar (for example:
60 bar), a safety valve MUST be installed on the field
piping according to this design pressure. It is NOT possible
to connect refrigeration parts with design pressure below
60 bar.
13 Piping installation
c
a
d
b
refrigeration
side.
Possible
(a)
pressure" [ 4 8].
Installation and operation manual
23
a
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