Daikin FXFN50A2VEB Installer And User Reference Manual page 52

16 | Unit installation
To determine the minimum number of appropriate measures
Installer and user reference guide
52
▪ 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.
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
16‒1 Installation layout example
a Outdoor unit
b Stop valve on the outdoor unit
c1 Liquid piping between outdoor unit and the shut off valve
c2 Liquid piping between indoor unit and the shut off valve
d1 Gas piping between outdoor unit and the shut off valve
d2 Gas piping between indoor unit and the shut off valve
e Bypassing piping
f Safety shut off valve
g Pressure relief valve
h Indoor unit
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
refrigerant leak detector (a safety alarm
2
b
c1 c1
g
e e
e e
f
b
d1 d1
Ø12.7 mm
d2 d2
h
...the number of appropriate measures
(a) 3
(m ) is... must be at least...
0
1
2
f
Ø9.52 mm
c2 c2
2 2
, use 250 m as the floor area for
2
and the
2 3
×2.5 m=625 m )
FXFN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P677925-1 – 2021.07