Additional Installation Site Requirements For Co₂ Refrigerant - Daikin FXFN50A2VEB Installer And User Reference Manual

16 | Unit installation
16.1.2 Additional installation site requirements for CO₂ refrigerant
Access category
General
Supervised Upper floors
without
emergency exits
Below ground
floor level
Other
Authorized Upper floors
without
emergency exits
Below ground
floor level
Other
Installer and user reference guide
50
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
Allowable refrigerant charge
The calculation of the allowable refrigerant charge depends on the combination of
the "access category" and the "location classification" as described in the following
table.
INFORMATION
Where the possibility exists of more than one access category, the more stringent
requirements apply. If occupied spaces are isolated, e.g. by sealed partitions, floors
and ceilings, the requirements of the individual access category apply.
I
Toxicity limit × Room volume
"Appropriate
Toxicity limit × Room
volume
or
"Appropriate
4
measures" [ 51]
No charge restriction
Toxicity limit × Room
volume
or
"Appropriate
4
measures" [ 51]
No charge restriction
Location classification
II
or
4
measures" [ 51]
No charge
restriction
R744
0.072 kg/m
0.074 kg/m
0.18 kg/m
0.1 kg/m
A1
III IV
No charge The charge shall
restriction be assessed
according to
location I, II or III,
depending on the
location of the
ventilated
enclosure
FXFN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P677925-1 – 2021.07
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