Daikin RXYQ10MY1K [287/310] Note 1

Selection of Pipe Size, Joints and Header Si39-502A

276 Appendix

∗Note 1

When overall equivalent pipe length is 90 m or more, the size of the main gas and liquid pipes (Outdoor unit-first branch kit) must be increased.

∗Note 2

Allowable length after the first refrigerant branch kit to indoor units is 40 m or less, however it can be extended up to 90 m

if all the following conditions are satisfied. (In case of " Branch with refnet joint ")

Diameter of above case

Model

Gas

Liquid

Model

RXYQ28MY1K(E), YLK(E)

RXYQ30MY1K(E), YLK(E)

Gas

Liquid

a

ABCDEFG

bcdef

1. It is necessary to increase the pipe size between

the first branch kit and the final branch kit.

(Reducers must be procured on site)

2. For calculation of Total extension length,

the actual length of above pipes must be doubled.

(except main pipe)

3. Indoor unit to the nearest branch kit

≤ 40 m

4. The difference between

[Outdoor unit to the farthest indoor unit] and

h, i, j ....... p ≤ 40 m

The farthest indoor unit 8

The nearest indoor unit 1

Increase the pipe size as follows

φ 6.4 → φ 9.5 φ12.7 → φ15.9 φ19.1 → φ22.2 φ34.9 → φ38.1

φ 9.5 → φ12.7 φ15.9 → φ19.1 φ28.6 → φ31.8