English
14
R =
Total length(m)
of liquid piping
size at
φ
22.2
Total length(m)
of liquid piping
size at
φ
15.9
Total length(m)
of liquid piping
size at
φ
9.5
Total length(m)
of liquid piping
size at
φ
19.1
Total length(m)
of liquid piping
size at
φ
12.7
Total length(m)
of liquid piping
size at
φ
6.4
0.37
kg/m
0.18
kg/m
0.059
kg/m
0.26
kg/m
0.12
kg/m
0.022
kg/m
1.02
RQCEQ280
RQCEQ360
RQCEQ460
RQCEQ500
RQCEQ540
RQCEQ636
RQCEQ712
RQCEQ744
RQCEQ816
RQCEQ848
5.2
5.8
9.1
9.4
9.7
11.2
13.8
14.3
15.1
15.6
A
≤
100%
A > 100%
0 kg
0.5 kg
Example for refrigerant branch using REFNET joint and REFNET header for the systems and each pipe length as shown below.
Correction amount by outdoor unit
Outdoor system : RQCEQ848PY13
Total capacity of indoor unit : 116%
R =
( 50 × 0.26 + 3 × 0.18 + 3 × 0.12 + 156 × 0.059 + 20 × 0.022 )×1.02 15.6 + 0.5
a :
φ
19.1 × 30m
b :
φ
19.1 × 20m
c :
φ
9.5 × 10m
d :
φ
9.5 × 10m
e :
φ
9.5 × 10m
f :
φ
9.5 × 10m
g :
φ
9.5 × 10m
h :
φ
9.5 × 10m
i :
φ
9.5 × 10m
j :
φ
9.5 × 10m
k :
φ
9.5 × 20m
l :
φ
9.5 × 20m
m :
φ
9.5 × 20m
n :
φ
9.5 × 10m
o :
φ
6.4 × 10m
p :
φ
6.4 × 10m
r :
φ
9.5 × 1m
s :
φ
9.5 × 1m
t :
φ
9.5 × 1m
u :
φ
9.5 × 3m
v :
φ
15.9 × 3m
w :
φ
12.7 × 3m
a, b
v
w
c~n, r~u
o, p
RQCEQ848PY13
112%
= 8.915
8.9 kg
Round 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 10.2)
1.
Outdoor unit
2.
Main pipes
3.
Increase only liquid pipe size
4.
First refrigerant branch kit
5.
BS unit
6.
Indoor unit
System
RQCEQ280P
RQCEQ360~460P
RQCEQ500~712P
RQCEQ744~848P
Liquid pipe
φ
9.5
→
φ
12.7
φ
12.7
→
φ
15.9
φ
15.9
→
φ
19.1
φ
19.1
→
φ
22.2
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.
(A: The ratio of total capacity
index of connectable indoor units
to outdoor capacity index (%).)
01_EN_3P226891-14T.fm Page 14 Tuesday, September 30, 2014 7:48 PM
