Daikin REYA12A7Y1B handleiding
Handleiding
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13 Special requirements for R32 units
Installation and operation manual
21
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P684060-1C – 2024.10
OTHER FLOORS
Table "Maximum capacity class"
Graph & table "Lowest underground floor" AND table "Maximum
capacity class"
LOWEST UNDERGROUND FLOOR
m Total refrigerant charge limit in the system
A
min
Smallest room area
(a) Lowest underground floor (=Lowest underground floor)
Step4 – Use the values on the unit nameplate to determine the total
amount of refrigerant in the system.
Contains fluorinated greenhouse gases
2
1
1
1
2
2
kg
tCO
2
eq
1000
GWP × kg
=
=
+
kg
=
kg
=
GWP: xxx
R32
Total charge=Factory charge
(a)
+additional charge
(b)
(a)
The factory charge value can be found on the nameplate.
(b)
The R value (additional refrigerant to be charged) is calculated in
"16.3To determine the additional refrigerant amount"[432].
Step5 – The total indoor capacity connected to a branch pipe port
(or pair of branch pipe ports in case of FXMA200/250) MUST be
equal or less than the capacity limit that is derived from the table.
Additionally, in case an indoor unit is installed in the lowest
underground floor, the total charge of the system MUST be less than
the limit that is derived from the graph. If NOT, change the
installation and repeat all of the above steps.
Possible changes:
▪ Increase the area of smallest room (installed & conditioned)
connected to the same branch pipe port.
▪ Reduce the indoor capacity connected to the same branch pipe
port to equal or below the limit.
▪ Add additional countermeasures as described in applicable
legislation. SVS output or optional output PCB for indoor unit can
be used to connect and activate the additional countermeasures
(e.g. mechanical ventilation). For more information, see "17.8 To
connect the external outputs"[439].
▪ Split indoor capacity over two separate branch pipe ports.
▪ Fine tune system with more detailed calculations in VRV Xpress.
NOTICE
The total refrigerant charge amount in the system MUST
always be lower than 15.96 [kg] × the number of indoor
units connected downstream of BS units, with a maximum
of 63.8kg.
Example1
VRV system serving three rooms via one BS unit. Room1 (20m²) is
served by one indoor unit (32class) connected to port A. Room 2
(42 m²) is served by two indoor units (2×50 class) connected to
portB (no extension and liquid pipe size up has been done). Room3
(150 m²) is served by one indoor unit (200 class) connected to
portsC and D.
Port A is connected to an indoor unit installed in room 1a, that is
serving a different room (room 1b) than where it is installed. The
smallest room size needs to be considered: 20 m². Use the table
under Step2 to find the maximum capacity class of the indoor unit:
80. The selected indoor unit is 32 →OK.
Port B only serves room 2: use the table under Step 2 to find the
maximum capacity class of the sum of the indoor units. 42 m² is
rounded down to 40m²: 100. The sum of both indoor units is exactly
100 →OK.
Ports C and D are combined and have to be considered as one
branch pipe. They only serve room3: Use the table under Step2 to
find the maximum capacity class of the indoor unit: 250. The
selected indoor unit is 200 →OK.
50 50200
b
a
Room 1a
20
m²
Room 1b
40
m²
Room 3
150
m²
Room 2
42
m²
D C B A
32
c
c
A~D Branch pipe port A~D
a Outdoor unit
b BS unit
c Indoor branch kit (refnet)
Room Room
32/50/200 Indoor unit capacity
Example2
VRV system serving three rooms via one BS unit. Room 1 (40m²,
one level underground) is served by one indoor unit (32 class)
connected to portA. Room2 (60m², ground level) is served by two
indoor units (1×20 and 1× 40 class) also connected to port A (no
extension and liquid pipe size up has been done).
Room3 (60m², 2 levels underground) is served by one indoor unit
(63 class) and is connected to portC.
Port A serves room 1 and 2: use the table under Step 2: the
smallest room determines the maximum sum of capacity classes.
For portA this is room1 → 100. 32+20+40=92 →OK.
Port C serves only room 3: use the table under Step 2 to find the
maximum capacity class of the indoor unit: 250. The selected indoor
unit is 63 →OK.
The building only has two underground floor levels, where room3 is
located on the lowest underground level. Maximum charge limit for
the complete system is determined using the graph for lowest
underground floor: 20.2kg.
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Productinformatie
| Merk | Daikin |
| Model | REYA12A7Y1B |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 10147 MB |
