To Select Refrigerant Branch Kits - Daikin VRV IV+ Installer And User Reference Manual

18 | Piping installation

18.1.4 To select refrigerant branch kits

Installer and user reference guide
74
Refrigerant refnets
For piping example, refer to
▪ When using refnet joints at the first branch counted from the outdoor unit side,
choose from the following table in accordance with the capacity of the outdoor
unit (example: refnet joint a).
Outdoor unit capacity type (HP)
8+10
12~22
24~54
▪ For refnet joints other than the first branch (example refnet joint b), select the
proper branch kit model based on the total capacity index of all indoor units
connected after the refrigerant branch.
Indoor unit capacity index
<200
200≤x<290
290≤x<640
≥640
▪ 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
<200
200≤x<290
290≤x<640
≥640
(a) If the pipe size above the refnet header is Ø34.9 or more, KHRQ23M75H is required.
INFORMATION
Maximum 8 branches can be connected to a header.
▪ How to choose an outdoor multi connection piping kit. Choose from the
following table in accordance with the number of outdoor units.
Number of outdoor units
2
3
INFORMATION
Reducers or T-joints are field supplied.
NOTICE
Refrigerant branch kits can only be used with R410A.
"To select the piping size" [
4
71].
3 pipes
KHRQ23M29T9
KHRQ23M64T
KHRQ23M75T
3 pipes
KHRQ23M20T
KHRQ23M29T9
KHRQ23M64T
KHRQ23M75T
3 pipes
KHRQ23M29H
(a)
KHRQ23M64H
KHRQ23M75H
Branch kit name
BHFQ23P907
BHFQ23P1357
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P561154-1A – 2020.10