Daikin VRV 5 RXYA8A7Y1B Installer And User Manual page 78

16 | Special requirements for R32 units
Installer and user reference guide
78
Area of installed/conditioned
room [m²]
1 indoor unit per branch pipe
11
12
13
14
15
20
25
30
35
40
≥45
(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
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
VRV Xpress it is 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.
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.
- Split indoor capacity over two separate branch pipe ports.
- Fine tune system with more detailed calculations in
Maximum total indoor unit capacity class
2~5 indoor units per branch pipe port
(a)
port
40 m after 1
80 20
80 25
80 32
80 32
125 40
140 50
250 71
250 125
250 200
250 200
250 250
"18.1 Preparing refrigerant
st (b) st
branch 90 m after 1 branch
—
—
—
—
—
40
71
125
200
200
250
4
piping" [ 90]).
VRV Xpress.
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
(c)