13 Piping installation
Installation and operation manual
20
LREN8~12A7 + LRNUN5A7
CO
₂
ZEAS outdoor unit and capacity up unit
4P704141-1B – 2022.12
12.3.2
To install the outdoor unit
1
Position the unit onto the installation structure. See also:
"10.1.3 To handle the outdoor unit"
13].
2
Fix the unit onto the installation structure. See also
provide the installation structure"
19]. Fasten the unit in place
using four foundation bolts M12. It is best to screw in the
foundation bolts until their length remains 20 mm above the
foundation surface.
20 mm
NOTICE
When installed in a corrosive environment, use a nut with
plastic washer (a) to protect the nut tightening part from
rust.
a
3
Remove the slings.
4
Remove the cardboard protection.
12.3.3
To remove the transportation stay
NOTICE
If the unit is operated with the transportation stay attached,
abnormal vibration or noise may be generated.
The compressor transportation stays protect the unit during
transport. They are located around the middle compressor (INV2).
During installation they must be removed.
1
Loosen the compressor mounting bolt.
2
Remove the screw.
3
Remove and dispose of the transportation stay.
4
Tighten the mounting bolt to 12.3 N•m of torque.
5
Remove the 2 screws.
6
Remove and dispose of the transportation stay.
1
4
2
6
3
(12.3 N·m)
5
12.3.4
To provide drainage
Make sure that condensation water can be evacuated properly.
NOTICE
Prepare a water drainage channel around the foundation to
drain waste water from around the unit. When the outdoor
temperatures are negative, the drained water from the
outdoor unit will freeze up. If the water drainage is not
taken care of, the area around the unit might be very
slippery.
13
Piping installation
13.1
Preparing refrigerant piping
13.1.1
Refrigerant piping requirements
WARNING
The unit contains small amounts of refrigerant R744.
NOTICE
Do NOT reuse piping from previous installations.
NOTICE
Foreign materials inside pipes are NOT allowed (including
oils for fabrication).
NOTICE
Refrigerant R744 requires strict cautions for keeping the
system clean and dry. Foreign materials (including mineral
oils or moisture) should be prevented from getting mixed
into the system.
