Daikin CO2 Conveni-pack LRYEN10A7Y1 Installer And User Reference Manual page 56

15 | Unit installation
To determine the minimum number of appropriate measures
Installer and user reference guide
56
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.
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.
70
65
a
60
55
50
45
40
35
30
25
20
15
10
5
0
0 200 250 300 350
50 100 150
15‒1 Example graph for calculation
A Refrigerant charge
B Room volume
a 2 appropriate measures required
b 1 appropriate measure required
c No measure required
For occupancies on the lowest underground floor of the building
If the total refrigerant charge (kg)
divided by the room volume
<RCL
>RCL and ≤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
...the number of appropriate measures
(a) 3
(m ) is... must be at least...
0
1
2
QLAV
b
400 450 500 550 600 650 700 750 800 850 900 950 1000
B (m³)
...the number of appropriate measures
(a) 3
(m ) is... must be at least...
0
1
2
Value CANNOT be exceeded!
2 2
, use 250 m as the floor area for
2
and the
2 3
×2.5 m=625 m )
QLMV
c
2 2
, use 250 m as the floor area for
2
and the
2 3
×2.5 m=625 m )
LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08