Daikin VRV IV Series - To Select Refrigerant Branch Kits; Refrigerant Piping Length and Height Difference

16 | Piping installation
Installer and user reference guide
69
RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12
Indoor unit capacity index Piping outer diameter size (mm)
Gas pipe Liquid pipe
63~140 15.9 9.5
200 19.1
250 22.2
16.1.4 To select refrigerant branch kits
For piping example, refer to "16.1.3To select the piping size"[467].
Refnet joint at first branch (counting from the compressor unit)
When using refnet joints at the first branch counted from the compressor unit side,
choose from the following table in accordance with the capacity of the compressor
unit. Example: Refnet joint c (B→C/D).
Compressor unit capacity type Refrigerant branch kit
5HP KHRQ22M20TA
8HP KHRQ22M29T9
Refnet joints at other branches
For refnet joints other than the first branch, select the proper branch kit model
based on the total capacity index of all indoor units connected after the refrigerant
branch. Example: Refnet joint c (C→D/D).
Indoor unit capacity index Refrigerant branch kit
<200 KHRQ22M20TA
200≤x<260 KHRQ22M29T9
Refnet headers
Concerning refnet headers, choose from the following table in accordance with the
total capacity of all the indoor units connected below the refnet header.
Indoor unit capacity index Refrigerant branch kit
<260 KHRQ22M29H
INFORMATION
Maximum 8 branches can be connected to a header.
16.1.5 Refrigerant piping length and height difference
The piping lengths and height differences must comply with the following
requirements.
H1
H2
H3
H5
L1
a
L2
L3
L4
L5
L6
L7
H4
b
EKEXV
AHU
VRV DX
VRV DX
c
c
a Heat exchanger unit