Daikin VRV II RXYQ5MY1B Service Manual page 318

SiE39-404
6.1.3 How to select the REFNET header
When connecting the indoor unit larger than 250 or more, use with KHRP26M33T,M72T to
upper stream side.
(Do not connect downstream side)
Select the proper REFNET Header using the following table based on the total capacity index of
indoor units installed after the header.
Total capacity index of indoor units
6.1.4 Piping between the REFNET Joints
Select the proper pipe size using the following table based on the total capacity index of indoor
units connected downstream.
Connection piping size should not exceed the refrigerant piping size selected by "the model with
combination units".
Total capacity index of indoor units
6.1.5 Piping between the REFNET Joints and indoor unit
Pipe size for direct connection to indoor unit must be the same as the connection size of indoor
unit.
Connection pipe size of indoor unit.
Appendix
<200
<290
≥290
<200
≥200~<290
≥290~<420
≥420
Indoor Units
20 · 25 · 32 · 40 · 50 Type
63 · 80 · 100 · 125 Type
200 Type
250 Type
Selection of Pipe Size, Joints and Header
REFNET Header (Kit Name)
KHRP26M22H (Max.4 Branches)
KHRP26M33H (Max.8 Branches)
KHRP26M72H (Max.8 Branches)
Gas
φ15.9
φ22.2
φ28.6
φ28.6
Gas Liquid
φ12.7 φ6.4
φ15.9
φ19.1 φ9.5
φ22.2
Liquid
φ9.5
φ12.7
φ15.9
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