13 Piping installation
Installation and operation manual
17
LRYELRNUN5A7Y1
CO
₂
Conveni-Pack outdoor unit and capacity up unit
4P605461-1B – 2020.08
▪ 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
▪ 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.
▪ When installed in a corrosive environment, use a nut
with plastic washer (a) to protect the nut tightening part
from rust.
a
12.3.2
To install the outdoor unit
1
Transport the unit by crane or forklift and put it onto the
installation structure.
a
b
a
LRYEN10*
b
LRNUN5*
2
Fix the unit to the installation structure.
8×
8×
a
b
a
LRYEN10*
b
LRNUN5*
3
If transported by crane, remove the slings.
12.3.3
To provide drainage
Make sure that condensation water can be evacuated properly.
13
Piping installation
13.1
Preparing refrigerant piping
13.1.1
Refrigerant piping requirements
WARNING
The unit is partially factory charged with refrigerant R744.
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.
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant and oil. Use K65 copper-iron alloy
tube system for high-pressure applications with a working
pressure of 120 bar at the air conditioner side and 90 bar
at the refrigeration side.
NOTICE
Do not use standard hoses and manometers. Use ONLY
equipment that is designed to use with R744.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30 mg/10 m.
13.1.2
Refrigerant piping material
▪
Piping temper grade and thickness:
Piping refrigeration unit
Piping type
Outer
diameter
(Ø)
Temper
grade
Thickness
(t)
(a)
Liquid piping
12.7 mm
(1/2")
R420
(with heat
treatment)
≥0.85 mm
t
Ø
Gas piping
15.9 mm
(5/8")
R300
(drawn)
≥1.05 mm
(a)
Depending on the applicable legislation and the maximum
working pressure of the unit (see "PS High" on the unit name
plate), larger piping thickness might be required.
Piping air conditioning unit
