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f
Blower coil (indoor unit for refrigeration)
g
Safety valve
h
CO
control panel
2
i
CO
detector
2
j
CO
alarm
2
k
CO
ventilator
2
l
Shut off valve
11.3
Indoor unit constraints
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.
NOTICE
The design pressure of the connected air conditioning
parts MUST be 12 MPa (120 bar). If this is not the case,
please contact your dealer for assistance.
WARNING
Only the refrigeration parts that are also designed to work
with CO
shall be connected to the system.
2
Individual control with a remote controller
In case of a system with several air conditioners that are controlled
with the same remote controller in the same space:
Capacity class
50
71+112
Restrictions
Keep the following restrictions in mind when you connect indoor
units:
Restriction
Minimum air conditioning total
capacity class
Maximum air conditioning total
capacity class
Maximum indoor units that can
be connected
For more information about the possible combinations, see the
installer and user reference guide of the outdoor unit.
12
Unit installation
12.1
Preparing the installation site
12.1.1
Installation site requirements of the
outdoor unit
Mind the spacing guidelines. See figure 1 on the inside of the front
cover.
Description of text on figure 1:
Item
A
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit and capacity up unit
4P605461-1B – 2020.08
Individual control with a
remote controller
NOT allowed
Allowed
Minimum/maximum
162
233
≤4
Description
Maintenance space
Item
B
C
h1
h2
X
Y (for patterns B)
Y (for patterns C)
(a)
Wall height front side: ≤1500 mm.
(b)
Wall height air inlet side: ≤500 mm.
(c)
Wall height other sides: no limit.
(d)
Calculate h1 and h2 as shown in the figure. Add h1/2 for
maintenance space to the front side. Add h2/2 for maintenance
space to the back side (if wall height exceeds above values).
CAUTION
Appliance not accessible to the general public, install it in a
secured area, protected from easy access.
This unit, both indoor and outdoor, is suitable for
installation
in
a
commercial
environment.
NOTICE
This is a class A product. In a domestic environment this
product may cause radio interference in which case the
user may be required to take adequate measures.
12.1.2
Additional installation site requirements
of the outdoor unit in cold climates
In heavy snowfall areas it is very important to select an installation
site where the snow will NOT affect the unit. If lateral snowfall is
possible, make sure that the heat exchanger coil is NOT affected by
the snow. If necessary, install a snow cover or shed and a pedestal.
INFORMATION
For instructions on how to install the snow cover, contact
your dealer.
12.1.3
Additional installation site requirements
for CO₂ refrigerant
NOTICE
Although it is recommended to install LRYEN10* and
LRNUN5* outdoors, in some cases it might be needed to
install them inside. In such cases, ALWAYS follow the
indoor installation site requirements for CO
WARNING
In case of mechanical ventilation, take care the ventilated
air is exhausted to the outdoor space and not into another
closed area.
Refrigerant basic characteristics
Refrigerant
RCL (refrigerant concentration limit)
QLMV (quantity limit with minimum ventilation)
QLAV (quantity limit with additional ventilation)
Toxicity limit
Safety class
12 Unit installation
Description
Possible patterns with installation
spaces in case of a single
(a)(b)(c)(d)
outdoor unit
Possible patterns with installation
spaces in case of an outdoor unit
(a)
connected to a capacity up unit
(b)(c)(d)
H1 (actual height)–1500 mm
H2 (actual height)–500 mm
Front side = 500 mm+≥h1/2
Air inlet side = 300 mm+≥h2/2
Air inlet side = 100 mm+≥h2/2
and
light
industrial
refrigerant.
2
R744
3
0.072 kg/m
3
0.074 kg/m
3
0.18 kg/m
3
0.1 kg/m
A1
Installation and operation manual
13
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