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Unit installation
Installer and user reference guide
47
FXSN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P602817-1A – 2020.05
Location classification
Description
Class II
Compressors in machinery
room or open air
If all compressors and pressure vessels are either located in a
machinery room or in the open air, the requirements for a class II
location shall apply, unless the system complies with the
requirements of class III. Coils and pipework including valves may be
located in an occupied space.
Class III
Machinery room or open air If all refrigerant-containing parts are located in a machinery room or
in the open air, the requirements for a class III location shall apply.
The machinery room shall fulfil the requirements of EN 378-3.
Class IV
Ventilated enclosure
If all refrigerant-containing parts are located in a ventilated
enclosure, the requirements for a class IV location shall apply. The
ventilated enclosure shall fulfil the requirements of EN 378-2 and EN
378-3.
Appropriate measures
INFORMATION
Appropriate measures are field supply. Choose and install all required appropriate
measures in accordance with EN 378-3:2016.
▪
(natural or mechanical) ventilation
▪
safety shut-off valves
▪
safety alarm, in combination with a CO
2
refrigerant leak detector (a safety alarm
alone is NOT considered an appropriate measure where occupants are restricted
in their movements)
▪
CO
2
refrigerant leak detector
WARNING
Install the unit only in locations where the doors of the occupied space are not tight
fitting.
WARNING
When using safety shut-off valves, make sure to install measures such as a bypassing
piping with a pressure relief valve (from liquid pipe to gas pipe). When the safety
shut-off valves close and no measures are installed, increased pressure may damage
the liquid piping.
Example:
Install the bypass piping (
e
) with a pressure relief valve (
g
) leading from
the liquid piping between indoor unit and the shut off valve (
c2
) to the gas piping
between outdoor unit and the shut off valve (
d1
).
a
b
f
f
h
g
b c1
c1
c2
c2
d1
d1
d2
d2
ee
ee
Ø12.7 mm
Ø9.52 mm
15‒1 Installation layout example
