Daikin FXL63LVE [52/56] Selection procedure

Daikin FXYFP32KB7V19 [52/56] Selection procedure
6
Systems • Introduction
51
• Introduction
6 Selection procedure
6-6 Refrigerant pipe selection
6-6-3 RSXYP16-30K
Connection example
Heat pump system
Connection of 8 indoor units
Indoor unit
Refnet joint
Refnet header
Branch with refnet joint Branch with refnet joint and refnet header Branch with refnet header
Maximum
allowable
length
Between outdoor and indoor units
Actual pipe length
Pipe length between outdoor and indoor units 100m
[Example] unit 8: a+b+c+d+e+f+g+p 100m [Example] unit 6: a+b+h 100m, unit 8: a+i+k 100m [Example] unit 8: i 40m
Equivalent length Equivalent pipe length between outdoor and indoor units 125m (Assume equivalent pipe length of refnet joint to be 0.5m and of the refnet header to be 1.0m (For calculation purposes))
Between outdoor unit (main) and outdoor unit (sub) Actual pipe length Pipe length between outdoor unit (main) and outdoor unit (sub) (Q) 5m
Allowable
height
length
Between outdoor and indoor units Difference in height Difference in height between outdoor and indoor units (H1) 50m ( 40m if outdoor unit is located in a lower position)
Between adjacent indoor units Difference in height Difference in height between adjacent indoor units (H2) 15m
Between outdoor unit (main) and outdoor unit (sub) Difference in height Difference in height between outdoor unit (main) and outdoor unit (sub) (H3) 5m
Allowable length after the branch Actual pipe length
Pipe length from first refrigerant branch kit (either refnet joint or refnet header) to indoor units 40m
Example unit 8: b+c+d+e+f+g+p 40m Example unit 6: b+h 40m, unit 8: i+k 40m Example unit 8: i 40m
Refrigerant branch kit selection How to select the refnet joint
•When using refnet joints at the first branch counted from the outdoor unit side. If the system capacity is <500, use KHRP26K40T + pipe size reducer.
If the system capacity is 500, use KHRP26K75T + pipe size reducer.
For refnet joints other than the first branch, select the proper branch kits based on the total capacity index of indoor units installed after the first branch, using the
following table:
How to select the refnet header
Select the proper branch kit based on the total capacity index of indoor units installed after the header, using the following table.
Branching is impossible between refnet header and indoor unit
For systems with a total capacity is 640, connect a refnet joint branch.
Example of downstream indoor units [Example] In case of refnet joint C: indoor units 3+4+5+6+7+8 [Example] In case of refnet joint B: indoor units 7+8
In case of refnet header: indoor units 1+2+3+4+5+6
[Example] In case of refnet header: indoor units 1+2+3+4+5+6+7+8
Pipe size selection
Pipe size = outer diameter x minimum wall thickness
(unit: mm)
Use the included reducing joint which matches the pipe size
Between the outdoor unit and the uppermost stream refrigerant branch kit
Select pipe size according to outdoor system name
Between two immediately adjacent refrigerant branch kits
Select the proper pipe size based on the total capacity index of indoor units connected downstream, using
the following table.
Select connection pipe size according to the outdoor unit. Do not select a larger pipe size
Between refrigerant branch kit and indoor unit
•Pipe size for direct connection to indoor unit must be the same as the connection size of the indoor unit.
Additional refrigerant to be charged
Calculation of additional refrigerant to be charged R (kg) is in function of total length of liquid lines L
NOTES
Round off R to 1 decimal place.
R = [(Lø22.2) x 0.39] + [(Lø19.1) x 0.28] + [(Lø15.9) x 0.19] + [(Lø12.7) x 0.12] + [(Lø9.5) x 0.06] + [(ø6.4) x 0.023] + 0 : RSXYP16,18,24,28
+ 0.4: RSXYP30
+ 0.6: RSXYP26
+ 0.8: RSXYP20
R = [30 x 0.39] + [10 x 0.19] + [10 x 0.12] + [40 x 0.06] + [49 x 0.023] + [0] = 18.32
A
Outdoor unit
REFNET joint (A-G)
Indoor units (1-8)
Outdoor unit
REFNET joint (A-B)
Refnet header
Indoor units (1-8)
Outdoor unit
REFNET header
Indoor units (1-8)
Indoor capacity index.........................................Branch kit
< 100........................................................................KHRP26K11T
100 x <160......................................................KHRP26K18T
160 x <330......................................................KHRP26K37T
330 x <640......................................................KHRP26K40T
> 640........................................................................KHRP26K75T
Indoor capacity index.........................................Branch kit
< 100........................................................................KHRP26K11H
100 x <160.......................................................KHRP26K18H
160 x <330.......................................................KHRP26K37H
330 x <640.......................................................KHRP26K40H
Pipe size connected to outdoor unit
Gas Liquid
RXYP16K ø 19.1 x t1.0 ø 34.9 x t1.3
RXYP18-20K ø 19.1 x t1.0 ø 34.9 x t1.3
RXYP24K ø 19.1 x t1.0 ø 41.3 x t1.7
RXYP26-30K ø 22.2 x t1.2 ø 41.3 x t1.7
Total capacity index Liquid Gas
< 100 ø 9.5 x t0.8 ø 15.9 x 1.0
100 x <160 ø 9.5 x .t08 ø 19.1 x 1.0
160 x <330 ø 12.7 x t0.8 ø 25.4 x 1.2
330 x <480 ø 15.9 x t1.0 ø 34.9 x 1.3
480 x <640 ø 19.1 x t1.0 ø 34.9 x 1.3
640 ø 19.1 x t1.0 ø 41.3 x 1.7
Connection pipe size of indoor unit
Total capacity index Gas Liquid
20, 25, 32, 40 ø 6.4 x t0.8 ø 12.7 x t0.8
50, 63, 80 ø 9.5 x t0.8 ø 15.9 x t1.0
100, 125 ø 9.5 x t0.8 ø 19.1 x t1.0
200 ø 12.7 x t0.8 ø 25.4 x t1.2
250 ø 12.7 x t0.8 ø 28.6 x t1.2
Example for refrigerant branch using refnet joint and refnet header for RSXYP28
a : ø22.2 x 30m d : ø9.5 x 10m g : ø6.4 x 10m j : ø6.4 x 10m
b : ø15.9 x 10m e : ø9.5 x 10m h : ø6.4 x 20m k : ø6.4 x 9m
c : ø9.5 x 10m f : ø9.5 x 10m i : ø12.7 x 10m
a
b
i
c+d+e+f
g+h+j+k
18.3kg

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