12 Unit installation
Installation and operation manual
16
LREN8~12A7 + LRNUN5A7
CO
₂
ZEAS outdoor unit and capacity up unit
4P704141-1B – 2022.12
a
b
d
d
e
g
h
i
j
k
l
f
c
a
Main outdoor unit (LREN*)
b
Capacity up unit (LRNUN5*): only in combination with
LREN12*
c
Safety valve (accessory bag)
d
Indoor unit for refrigeration (showcase) (field supply)
e
Indoor unit for refrigeration (blower coil) (field supply)
f
Safety valve (field supply)
g
Communication box (BRR9B1V1)
h
CO
2
control panel (field supply)
i
CO
2
detector (field supply)
j
CO
2
alarm (field supply)
k
CO
2
ventilator (field supply)
l
Shut off valve (field supply)
11.3
Indoor unit constraints
WARNING
ONLY the refrigeration parts that are also designed to work
with R744 (CO
2
) shall be connected to the system.
NOTICE
The design pressure of high pressure side of the
connected refrigeration parts MUST be 9 MPaG (90 bar
gauge).
NOTICE
If the design pressure of the gas piping of refrigeration
parts is different from 90 bar gauge (for example: 6 MPaG
(60 bar gauge)), 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 gauge.
12
Unit installation
WARNING
▪ Install all necessary countermeasures in case of
refrigerant leakage according to standard EN378 (see
"12.1.3 Additional installation site requirements for CO
▪ Install a CO
2
leak detector (field supply) in every room
with refrigerant piping, showcases or blower coils, and -
if present - enable the function for refrigerant leak
detection (see the installation manual of the indoor
units).
WARNING
Fix the unit correctly. For instructions, see
16].
NOTICE
Adverse effects shall be considered. For example, danger
of water collecting and freezing in discharge pipes for
pressure relief devices, accumulation of dirt and debris, or
blockage of the discharge pipes by solid CO
2
(R744).
INFORMATION
The installer is responsible for supplying the field supply
components.
12.1
Preparing the installation site
12.1.1
Installation site requirements of the
outdoor unit
CAUTION
Appliance NOT accessible to the general public, install it in
a secured area, protected from easy access.
The equipment meets the requirements for commercial
and light-industrial locations when professionally installed
and maintained.
CAUTION
This equipment is NOT intended for use in residential
locations and will NOT guarantee to provide adequate
protection to radio reception in such locations.
NOTICE
If the equipment is installed closer than 30 m to a
residential location, the professional installer MUST
evaluate the EMC situation before installation.
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.
INFORMATION
The sound pressure level is less than 70 dBA.
Mind the spacing guidelines. See figure 1 on the inside of the front
cover of this manual.
Description of text on figure 1:
Item
Description
A
Maintenance space
B
Possible patterns with installation
spaces in case of a single
outdoor unit
(a)(b)(c)(d)
C
Possible patterns with installation
spaces in case of an outdoor unit
connected to a capacity up unit
(a)
(b)(c)(d)
h1
H1 (actual height)–1500 mm
h2
H2 (actual height)–500 mm
X
Front side = 500 mm+≥h1/2
Y (for patterns B)
Air inlet side = 300 mm+≥h2/2
Y (for patterns C)
Air inlet side = 100 mm+≥h2/2
(a)
Wall height front side: ≤1500 mm.
(b)
Wall height air inlet side: ≤500 mm.
(c)
Wall height other sides: no limit.
