Daikin RQYQ140-180PY1 Service Manual page 230

Example of connection (R-410A Type)
How to calculate the
additional refrigerant
to be charged
Additional refrigerant to
be charged : R(kg)
R should be rounded
off in units of 0.1 kg.
Note 1.
When the equivalent pipe length between outdoor unit multi connection
piping and indoor units is 90m or more, the size of main pipes on the liquid
side (refer to figure 9) must be increased according to the right table.
(Do not increase the size of the suction gas pipe and HP/LP gas pipe.)
(Refer to figure below.)
1.Outdoor unit
2.Main pipes
3.Increase only liquid pipe size
4.First refrigerant branch kit
5.BS unit
6.Indoor unit
1
4
5
2
3
221
Total length(m)
0.37
R = of liquid piping
kg/m
size at φ22.2
Total length(m)
0.18
of liquid piping
kg/m
size at φ15.9
Total length(m)
0.059
of liquid piping
kg/m
size at φ9.5
Example for refrigerant branch using REFNET joint and REFNET header for the systems and each pipe length as shown below.
Outdoor system : RQCEQ848PY1
Total capacity of indoor unit : 116%
( 50 × 0.26 + 3 × 0.18 + 3 × 0.12 + 156 × 0.059 + 20 × 0.022 )×1.02 15.6 + 0.5
R =
a, b v
= 8.915 8.9 kg
Round off in units of 0.1 kg.
System
RQCEQ280P
RQCEQ360~460P
RQCEQ500~712P
RQCEQ744~848P
6
Total length(m)
0.26
Correction amount by outdoor unit
of liquid piping
kg/m
size at φ19.1
RQCEQ280
RQCEQ360
1.02
RQCEQ460
Total length(m)
0.12
of liquid piping
RQCEQ500
kg/m
size at φ12.7
RQCEQ540
Total length(m)
0.022
of liquid piping
kg/m
size at φ6.4
a : φ19.1 × 30m e : φ9.5 × 10m
b : φ19.1 × 20m f : φ9.5 × 10m
c : φ9.5 × 10m g : φ9.5 × 10m
d : φ9.5 × 10m h : φ9.5 × 10m
w c~n, r~u o, p
Liquid pipe
φ9.5 → φ12.7
φ12.7 → φ15.9
φ15.9 → φ19.1
φ19.1 → φ22.2
RQCEQ636
5.2 11.2
RQCEQ712
5.8 13.8
A ≤ 100%
9.1 RQCEQ744 14.3
A > 100%
9.4 RQCEQ816 15.1
(A: The ratio of total capacity
9.7 RQCEQ848 15.6
index of connectable indoor units
to outdoor capacity index (%))
i : φ9.5 × 10m m : φ9.5 × 20m r : φ9.5 × 1m
j : φ9.5 × 10m n : φ9.5 × 10m s : φ9.5 × 1m
k : φ9.5 × 20m o : φ6.4 × 10m t : φ9.5 × 1m
l : φ9.5 × 20m p : φ6.4 × 10m u : φ9.5 × 3m
RQCEQ848PY1 112%
SiBE341001
0 kg
0.5 kg
v : φ15.9 × 3m
w : φ12.7 × 3m
Appendix