Daikin VRV 5 RXYA8A7Y1B Installation And Operation Manual page 25

Area of installed/ Maximum total indoor unit capacity class
conditioned room [m²]
1 indoor unit per
(a)
branch pipe port
10 80
11 80
12 80
13 80
14 80
15 125
20 140
25 250
30 250
35 250
40 250
≥45 250
(a)
One indoor unit connected to a single branch pipe port.
(b)
Two to five indoor units connected to a single branch pipe port,
40 m after first refrigerant branch.
(c)
Two to five indoor units connected to a single branch pipe port,
90 m after first refrigerant branch (size-up of liquid pipe, see
"15.1 Preparing refrigerant
Notes:
▪ The values in the table are under the assumption of worst case
indoor unit volume and 40 m piping between indoor and SV unit
and an installation height between 1.8 m and 2.2 m (bottom of
indoor unit or bottom of duct openings). In
possible to add custom piping lengths, installation heights above
2.2 m and custom indoor units which can lead to lower minimum
room area requirements.
▪ In case the capacity class allowed per branch pipe port is bigger
than 140, use SV1A unit or combine two ports while using
SV4~8A. For more information and installation of the SV unit,
please refer to the installation and operation manual delivered with
the SV unit.
▪ In case multiple indoor units are connected to the same branch
pipe port, the sum of the connected indoor unit capacity classes
needs to be equal or less than the value indicated in the table.
▪ In case indoor units connected to the same branch pipe port are
split over different rooms, the area of the smallest room needs to
be considered.
▪ Round down the derived values.
Step 3 – 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.
If NOT, change the installation and repeat all of the above steps.
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
2~5 indoor units per branch pipe port
40 m after 1 st branch (b) 90 m after 1 st branch
— —
20 —
25 —
32 —
32 —
40 —
50 40
71 71
125 125
200 200
200 200
250 250
piping" [ 4 29]).
VRV Xpress
Special requirements for R32 units
Possible changes:
▪ Increase the area of smallest room (installed & conditioned)
(c)
connected to the same branch pipe port.
▪ Reduce the indoor capacity connected to the same branch pipe
port to equal or below the limit.
▪ Split indoor capacity over two separate branch pipe ports.
▪ Fine tune system with more detailed calculations in
Xpress.
Example
VRV system serving three rooms via one SV unit. Room 1 (20 m²) is
served by one indoor unit (32 class) connected to port A. Room 2
(42 m²) is served by two indoor units (2×50 class) connected to
port B (no extension and liquid pipe size up has been done). Room 3
(150 m²) is served by one indoor unit (200 class) connected to
ports C 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 Step 2 to find the maximum capacity class limit of the indoor
unit: 140. 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 limit of the sum of the indoor units. 42 m² is
rounded down to 40 m²: 200. The sum of both indoor units is exactly
it is
100 → OK.
Ports C and D are combined and must be considered as one branch
pipe. They only serve room 3: Use the table under Step 2 to find the
maximum capacity class limit of the indoor unit: 250. The selected
indoor unit is 200 → OK.
a
D
200
Room 3
150 m²
A~D Branch pipe port A~D
a Outdoor unit
b SV unit
c Indoor branch kit (refnet)
Room Room
32/50/200 Indoor unit capacity
b
C B A
c
c
50 50 32
Room 2 Room 1a
42 m² 20 m²
Installation and operation manual
VRV
Room 1b
40 m²
25