Daikin FXSN112A2VEB Installer And User Manual page 47

Location classification
Class II Compressors in machinery
room or open air
Class III Machinery room or open air If all refrigerant-containing parts are located in a machinery room or
Class IV Ventilated enclosure
Appropriate measures
To determine the minimum number of appropriate measures
FXSN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P602817-1 – 2020.02
Description
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.
in the open air, the requirements for a class III location shall apply.
The machinery room shall fulfil the requirements of EN 378-3.
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.
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
alone is NOT considered an appropriate measure where occupants are restricted
in their movements)
▪ CO refrigerant leak detector
2
WARNING
Install the unit only in locations where the doors of the occupied space are not tight
fitting.
For occupancies other than on the lowest underground floor of the building
If the total refrigerant charge (kg)
divided by the room volume
<QLMV
>QLMV and <QLAV
>QLAV
(a)
For occupied spaces with a floor area exceeding 250 m
determination of the room volume (Example: even if the room area is 300 m
room height is 2.5 m, calculate the room volume as 250 m
Example: Total refrigerant charge in the system is 45 kg and room volume is
3
300 m . 45/300 = 0.15, which is >QLMV(0.074) and <QLAV(0.18), therefore install
at least 1 appropriate measure in the room.
refrigerant leak detector (a safety alarm
2
...the number of appropriate measures
(a) 3
(m ) is... must be at least...
0
1
2
2
, use 250 m
15 Unit installation
|
2
as the floor area for
2
and the
2 3
× 2.5 m = 625 m )
Installer and user reference guide
47