Daikin RXYTQ10U7YF [70/152] Piping installation

Daikin RXYTQ46U7YF [70/152] Piping installation
18 | Piping installation
Installer and user reference guide
70
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P561157-1A – 2020.10
Outdoor unit capacity type (HP) 2 pipes
8+10 KHRQ22M29T9
12~22 KHRQ22M64T
24~48 KHRQ22M75T
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 2 pipes
<200 KHRQ22M20T
200≤x<290 KHRQ22M29T9
290≤x<640 KHRQ22M64T
≥640 KHRQ22M75T
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 2 pipes
<200 KHRQ22M29H
200≤x<290
290≤x<640 KHRQ22M64H
(a)
≥640 KHRQ22M75H
(a) If the pipe size above the refnet header is Ø34.9 or more, KHRQ22M75H 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 Branch kit name
2 BHFQ22P1007
3 BHFQ22P1517
INFORMATION
Reducers or T-joints are field supplied.
NOTICE
Refrigerant branch kits can only be used with R410A.
18.1.5 About the piping length
Make sure to perform the piping installation within the range of the maximum
allowable pipe length, allowable level difference and allowable length after
branching as indicated below.

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