13 Piping installation
Installation and operation manual
25
LREN8~12A7 + LRNUN5A7
CO
₂
ZEAS outdoor unit and capacity up unit
4P704141-1B – 2022.12
6
Close stop valves CsV3 and CsV4 and service ports SP3, SP7
and SP11.
7
Connect the field piping to the cut pipes.
13.3.2
To connect the refrigerant piping to the
outdoor unit
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).
You can route refrigerant piping to the front or side of the unit.
For the outdoor unit
a
b
a
Left side connection
b
Front connection
For the capacity up unit
a
b
a
Left side connection
b
Front connection
NOTICE
Precautions when making knockout holes:
▪ Avoid damaging the casing.
▪ After making the knockout holes, we recommend you
remove the burrs and paint the edges and areas
around the edges using repair paint to prevent rusting.
▪ When passing electrical wiring through the knockout
holes, wrap the wiring with protective tape to prevent
damage.
Front connection
NOTICE
Protect the unit from damage during brazing.
1
Remove the left front panel of the outdoor unit and, if
applicable, the one of the capacity up unit. See
2
Remove the knockout in the small front plate of the outdoor unit
and, if applicable, the one of the capacity up unit. For more
information, see
"14.3 Guidelines when knocking out knockout
32].
a
b
d
c
c
3
Cut off the spun pipe ends. See
"13.3.1 To cut off the spun pipe
24].
4
Connect the accessory gas and liquid pipes for front connection
to the outdoor unit.
a
b
A
B
A
Stop valve (gas)
B
Stop valve (liquid)
a
Gas pipe (accessory)
b
Liquid pipe (accessory)
5
Connect the accessory pipes to the field piping and if
applicable, to the capacity up unit.
Side connection
NOTICE
Protect the unit from damage during brazing.
1
Remove the left front panel of the outdoor unit and, if
applicable, the one of the capacity up unit. See
2
Unscrew the 4 screws to remove the side plate of the outdoor
unit.
