16
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Unit installation
Installer and user reference guide
50
FXFN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P677925-1 – 2021.07
16.1.2 Additional installation site requirements for CO₂ 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
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.
Access category
Location classification
I
II
III
IV
General
Toxicity limit × Room volume
or
No charge
restriction
The charge shall
be assessed
according to
location I, II or III,
depending on the
location of the
ventilated
enclosure
Supervised
Upper floors
without
emergency exits
Toxicity limit × Room
volume
or
No charge
restriction
Below ground
floor level
Other
No charge restriction
Authorized
Upper floors
without
emergency exits
Toxicity limit × Room
volume
or
Below ground
floor level
Other
No charge restriction
Summary of Contents for FXFN112A2VEB
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