Daikin VRV III RXYQ5-54PY1, Service Manual

Page: 375 / 398

Example of connection (R-410A Type) Si34-601A
364 Appendix
∗
Note 1
When the equivalent pipe length between outdoor and indoor units is 90m or more, the size of main pipes (both gas-side and liquid-side) must be increased.
Depending on the length of the piping, the capacity may drop, but even in such case it is able to increase the size of main pipes.
∗
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 ” )
∗
Note 3
If the pipe size above the REFNET header is
φ
34.9 or more, KHRP26M73HP is required.
Diameter of above case
Model Gas Liquid
RXYQ5 Type
φ
19.1
φ
12.7
RXYQ8 Type
φ
22.2
φ
25.4*
φ
12.7 RXYQ10 Type
Not
Increased
Not
Increased
φ
15.9 RXYQ12 Type
Not
Increased
φ
15.9 RXYQ14 Type
RXYQ16 Type
RXYQ20 Type
RXYQ22 Type
RXYQ24 Type
RXYQ26 Type
RXYQ28 Type
RXYQ34 Type
RXYQ36 Type
RXYQ38 Type
RXYQ40 Type
RXYQ48 Type
RXYQ50 Type
RXYQ52 Type
RXYQ54 Type
φ
31.8*
φ
15.9
RXYQ18 Type
φ
31.8*
φ
19.1
Model Gas Liquid
φ
31.8*
φ
19.1
φ
31.8*
φ
19.1
Not
Increased
φ
19.1
φ
38.1*
φ
22.2
φ
38.1*
φ
22.2
RXYQ30 Type
φ
38.1*
φ
22.2
RXYQ32 Type
φ
38.1*
φ
22.2
Model Gas Liquid
φ
38.1*
φ
22.2
Not
Increased
Not
Increased
Not
Increased
φ
22.2
φ
22.2
φ
22.2
RXYQ42 Type
RXYQ44 Type
Not
Increased
Not
Increased
φ
22.2
φ
22.2
RXYQ46 Type
Not
Increased
φ
22.2
Model Gas Liquid
Not
Increased
Not
Increased
Not
Increased
Not
Increased
φ
22.2
φ
22.2
φ
22.2
φ
22.2
*If available on the site, use this size.
Otherwise, it can not be increased.
*If available on the site, use this size. Otherwise it can not be increased.
Required Conditions Example Drawings
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 and the pipes
that are not increased)
3. Indoor unit to the nearest branch kit
≤
40 m
4. The difference between
[Outdoor unit to the farthest indoor unit] and [Outdoor unit
to the nearest indoor unit]
≤
40 m
8 b + c + d + e + f + g + p
≤
90 m
increase the pipe size of b, c, d, e, f, g
a + b × 2 + c × 2 + d × 2 + e × 2 + f × 2 + g × 2
+ h + i + j + k + l + m + n + p
≤
1000 m
h, i, j....... p
≤
40 m
The farthest indoor unit 8
The nearest indoor unit 1
( a + b + c + d + e + f + g + p ) - ( a + h )
≤
40 m
Increase the pipe size as follows
φ
9.5
→ φ
12.7
φ
12.7
→ φ
15.9
φ
15.9
→ φ
19.1
φ
19.1
→ φ
22.2
φ
22.2
→ φ
25.4*
φ
28.6
→ φ
31.8*
φ
34.9
→ φ
38.1*
a
A B C D E F G
b c d e f
g
h i j k l m n
1 2 3 4 5 6 7
8
H1
p
Outdoor unit
REFNET joint (A-G)
Indoor units ( 1 - 8 )
Outdoor unit
Main pipes
Increase
The first refrigerant branch kit
Indoor unit