Daikin FXL63LVE [53/56] Selection procedure

Daikin FXN25LVE [53/56] Selection procedure
• Introduction
6
Systems • Introduction
52
6 Selection procedure
6-6 Refrigerant pipe selection
6-6-4 RSEYP8-10K
Connection example
Connection of 8 indoor units
Indoor unit
Refnet joint
Refnet header
Three lines
Two lines
Connecting-line length
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+t 100m [Example] unit 1: a+f+g+h 100m, unit 7: a+b+c+d 100m [Example] unit 8: a+p 100m
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))
Allowable height 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)
Allowable height between adjacent indoor
units
Difference in height between adjacent indoor units (H2) 15m
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+t 40m [Example] unit 1: f+g+h 40m, unit 7: b+c+d 40m [Example] unit 8: p 40m
Connecting line Piping between outdoor and BS units
Connect three connecting lines: suction gas line, discharge gas line and liquid line (Thick lines above)
Select refrigerant branch kit from KHRP25K20T, 18T, 37H and 18H (For how to select, refer to the item below)
Piping between BS unit and indoor unit and between refrigerant branch kit and cool-only indoor unit
Connect two connecting lines: gas line (suction gas line in the case of cool-only indoor unit) and liquid line (Thin lines above)
Select refrigerant branch kit from KHRP26K18T, and 18H (For how to select, refer to the item below)
Refrigerant branch kit selection How to select the refnet joint
•When using a refnet joint at the first branch counted from the outdoor unit side, use KHRP25K20T. [Example: refnet joint A]
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.
Example of downstream indoor units [Example] In case of refnet joint C: indoor units 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)
Between the outdoor unit and the uppermost stream refrigerant branch kit
•Match the pipe size to the pipe size of the outdoor unit
•When only one BS unit is connected per refrigerant line of the outdoor unit, discharge gas line does not
branch. In this case, use ø15.9 discharge gas line in order to prevent confusion with suction gas line.
Between two immediately adjacent refrigerant branch kits and BS unit
Select the proper pipe size based on the total capacity index of indoor units connected downstream, using
the following table.
•When two lines are connected between two adjacent refrigerant branch kits, select the proper gas line size
based on data mentioned under “Suction gas line” column in the table above.
Between BS unit (refrigerant branch kit) and indoor unit
Select the proper pipe size based on the total capacity index of indoor units connected downstream, using
the following table.
(Pipe size for direct connection to indoor unit must be the same as the connection size of the indoor unit.)
•When the total capacity sum is in the range marker *, the connection size of the BS unit (BSVP100KV1) is
different from connecting line size, reduce the connecting line size by using tapered pipe attached to the BS 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 and as follows:
R=[(Lø12.7) x 0.12] + [(Lø9.5) x 0.06] + [(L ø6.4) x 0.023]
NOTES
Round off R to 1 decimal place.
•If R is 0, keep the unit in operation
Example
R = [45 x 0.12] + [44 x 0.06] + [28 x 0.023] = 8.6 R = 8.6kg
Example
R = [40 x 0.12] + [30 x 0.06] + [69 x 0.023] = 8.18 R = 8.18kg
Example
R = [40 x 0.12] + [70 x 0.06] + [68 x 0.023] = 10.56 R = 10.56kg
(V2891)
A
a~
t
1234567
8
B1 B2
H2
H1
B3 B4
a
bcde
f
g
hk
i
n
q
st
mpr
AB
CDE
FG
1 ~ 6 Either cool or heat mode can be selected
7 + 8 Cooling only
123456
7
8
H2
H1
B5
B1
B2
B3 B4
a
hj ln
gi k
m
p
q
f
ce
d
b
A
B
1 ~ 4, 7 + 8 Either cool or heat mode can be selected
5 + 6 Cooling only
12 3 4 5 6 7
8
H2
H1
B1
B2
B3 B4 B5 B6
a
fdbhjln
gecikm
p
1 ~ 6 Either cool or heat mode can be selected
7 + 8 Cooling only
BS
UNIT
Discharge gas line
Suction gas line
Liquid line
Gas line
Liquid line
Total capacity index of indoor units...............................................................................Branch kit
160 ........................................................................KHRP25K20T
< 160 3 lines..........................................................KHRP25K18T
2 lines..........................................................KHRP26K18T
Total capacity index of indoor units...............................................................................Branch kit
160 ........................................................................KHRP25K37H (up to 8 branches)
< 160 3 lines..........................................................KHRP25K18H (up to 6 branches)
2 lines..........................................................KHRP26K18H (up to 8 branches)
Pipe size connected to outdoor unit
Suction gas line Discharge gas line Liquid line
RSEYP8 ø 25.4 x 1.2 ø 19.1 x 1.0 ø 12.7 x 0.8
RSEYP10 ø 28.6 x 1.2 ø 19.1 x 1.0 ø 12.7 x 0.8
Total capacity index Suction gas line Discharge gas line Liquid line
* < 50 ø 12.7 x 0.8 ø 9.5 x 0.8 ø 6.4 x 0.8
50~100 ø 15.9 x 1.0 ø 12.7 x 0.8 ø 9.5 x 0.8
> 100~160 ø 19.1 x 1.0 ø 15.9 x 1.0 ø 9.5 x 0.8
> 160 ø 25.4 x 1.2 ø 19.1 x 1.0 ø 12.7 x 0.8
Connection pipe size of indoor unit
Total capacity index Gas pipe Liquid pipe
* < 50 ø 12.7 x 0.8 ø 6.4 x 0.8
50~100 ø 15.9 x 1.0 ø 9.5 x 0.8
> 100~160 ø 19.1 x 1.0 ø 9.5 x 0.8
a : ø12.7 x 30m f : ø9.5 x 5m k : ø6.4 x 5m p : ø6.4 x 5m
b : ø12.7 x 10m g : ø9.5 x 5m l : ø9.5 x 5m r : ø6.4 x 3m
c : ø12.7 x 5m h : ø9.5 x 5m m : ø9.5 x 2m s : ø6.4 x 5m
d : ø9.5 x 5m i : ø9.5 x 5m n : ø9.5 x 5m t : ø6.4 x 5m
e : ø9.5 x 5m j : ø6.4 x 5m o : ø9.5 x 2m
a : ø12.7 x 40m e : ø9.5 x 5m i : ø6.4 x 5m m : ø6.4 x 10m
b : ø9.5 x 10m f : ø9.5 x 10m j : ø6.4 x 2m n : ø6.4 x 4m
c : ø9.5 x 5m g : ø6.4 x 5m k : ø6.4 x 10m o : ø6.4 x 10m
d : ø9.5 x 5m h : ø6.4 x 2m l : ø6.4 x 2m p : ø6.4 x 10m
a : ø12.7 x 40m e : ø9.5 x 5m i : ø6.4 x 2m m : ø6.4 x 2m
b : ø9.5 x 10m f : ø6.4 x 10m j : ø6.4 x 20m n : ø6.4 x 10m
c : ø9.5 x 5m g : ø6.4 x 2m k : ø6.4 x 2m p : ø6.4 x 30m
d : ø9.5 x 20m h : ø6.4 x 10m l : ø6.4 x 10m

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