14
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Unit installation
Installer and user reference guide
60
LREN8~12A7 + LRNUN5A7
CO₂ ZEAS outdoor unit and capacity up unit
4P704142-1 – 2022.08
▪
In places where a mineral oil mist, spray or vapour may be present in the
atmosphere. Plastic parts may deteriorate and fall off or cause water leakage.
It is NOT recommended to install the unit in the following places because it may
shorten the life of the unit:
▪
Where the voltage fluctuates a lot
▪
In vehicles or vessels
▪
Where acidic or alkaline vapour is present
14.1.2 Additional installation site requirements of the outdoor unit in cold climates
NOTICE
When operating the unit in a low outdoor ambient temperature, be sure to follow
the instructions described below.
To prevent exposure to wind and snow, install a baffle plate on the air side of the
outdoor unit.
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.
NOTICE
When installing the snow cover, do NOT obstruct the air flow of the unit.
14.1.3 Additional installation site requirements for CO₂ refrigerant
NOTICE
Although it is recommended to install LREN* 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
2
refrigerant.
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
R744
RCL (refrigerant concentration limit)
0.072 kg/m
3
QLMV (quantity limit with minimum ventilation)
0.074 kg/m
3
QLAV (quantity limit with additional ventilation)
0.18 kg/m
3
Toxicity limit
0.1 kg/m
3
Safety class
A1
