Daikin VRV IV - Page 75

18 | Piping installation
Installer and user reference guide
75
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1A – 2020.10
Example Description
Example 2.3
a
b
1 2 3 4 5 6 7
8
c d e f g h i
t
u
r
s
H1
H3
H2
Multi outdoor
Branch with refnet header
Example 3
r s
u
t
With standard multi layout
Indoor unit
Refnet joint
Refnet header
Outdoor multi connection piping kit
Maximum allowable length
▪ Between outdoor and indoor units (single/multi combinations)
Actual piping length 165m/135m
Example 1.1
▪ unit8: a+b+c+d+e+f+g+p≤165m
Example 1.2
▪ unit6: a+b+h≤165m
▪ unit8: a+i+k≤165m
Example 1.3
▪ unit8: a+i≤165m
Example 2.1
▪ unit8: a+b+c+d+e+f+g+p≤135m
Equivalent length 190m/160m
Total piping length 500m/500m
Example 1.1
▪ a+b+c+d+e+f+g+h+i+j+k+l+m+n+p≤500m
Example 2.1
▪ a+b+c+d+e+f+g+h+i+j+k+l+m+n+p≤500m
▪ Between outdoor branch and outdoor unit (only in case of a multi outdoor
installation)
Actual piping length 10m
Example 3
▪ r, s, t≤10m; u≤5m
Equivalent length 13m