Daikin VRV 5 RXYA8A7Y1B Installer And User Manual page 97

RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
c 15 m
d 10 m
1 The equivalent length for an indoor unit connected to SV1 is the sum of:
- a=20 m,
- b=10 m,
- equivalent length of branch pipe=6.7 m,
- and the equivalent length of SV1 depending on the total downstream Capacity
Index as indicated in the table above: CI 400 → 3.42 m.
20+10+(6.7+3.42)=40.12 m
2 The equivalent length for an indoor unit connected to SV2 is the sum of:
- a=20 m,
- c=15 m,
- d=10 m,
- equivalent length of branch pipe=6.7 m,
- the equivalent length of SV1 depending on total downstream Capacity Index as
indicated in the table above: CI 400 → 3.42 m,
- and the equivalent length of SV2 depending on total downstream Capacity
Index as indicated in the table above: CI 200 → 0.4 m.
20+15+10+(3.42)+(6.7+0.4)=55.52 m
Allowable height difference
Term
H1
H2
H3
H4
(a)
The allowable height difference is 50 m in case the outdoor unit is positioned higher than
the indoor unit, and 40 m in case the outdoor unit is positioned lower than the indoor unit.
If only VRV DX indoor units are used, the allowable height difference between outdoor and
indoor units may be extended to 90 m, without the need of an additional option kit. In this
case, make sure all conditions below are met:
The outdoor unit is positioned higher than the indoor units:
• Size up the liquid piping (refer to
• Activate the outdoor unit setting. Refer to the service manual for more information.
The outdoor unit is positioned lower than the indoor units:
• Size up the liquid piping (refer to
• Activate the outdoor unit setting. Refer to the service manual for more information.
(b)
For mix of VRV DX indoor units and AHU's, multiple AHU's (EKEXVA+EKEA kits), and also
connection of only one AHU.
(c)
For mix of VRV DX indoor units and AHU's, and multiple AHU's (EKEXVA+EKEA kits).
Definition
Height difference
between outdoor and
indoor units
Height difference
between indoor units
Height difference
between outdoor units
Height difference
between EKEXVA–kits and
AHU units
"18.1.4 To select the piping
"18.1.4 To select the piping
18 Piping installation
|
Height difference [m]
(a)
50/40
(b)
40/40
30
(c)
15
5
5
4
size" [ 91] for more information)
size" [ 4 91] for more information)
Installer and user reference guide
97