RZQG71~140L + RZQSG100~Y1B(9)
Split system air conditioners
4P327537-1 – 2012.08
Installation manual
14
12.3. Calculating the additional refrigerant charge
The additional charging amounts relate to the refrigerant piping
length as in "Maximum total one-way piping length" of the table
in paragraph
"8.4. Allowable pipe length and height difference"
. (E.g. twin: L1+L2+L3).
Over 30 m, please add refrigerant quantity according to
following table.
For future servicing, mark with a circle the selected amount on the
tables below
For pair system
Table 1:
Additional charging of refrigerant <unit: kg>
For twin, triple, and double twin system
Please charge additional according to the following calculation.
(additional amount is R1+R2)
1.
G1: total length of Ø9.5 mm liquid piping
G2: total length of Ø6.4 mm liquid piping
2.a
G1>30 m
calculate length over 30 m (=G1–30 m)
Based on this length decide R1, R2 in the table
2.b
G1
≤
30 m and G1+G2>30 m
calculate total length over 30 m (=G1+G2–30 m)
Based on this decide R2 in the table, R1=0
3.
Total additional charge amount
R=R1+R2 (kg)
Table 2:
Length <unit: m>, additional charging of refrigerant
<unit: kg>
Example 1
1.
G1=L1=35 m
G2=L2+L3=7+5=12
2.
Over 30 m
a
G1–30=5 m
Ø9.5 R1=0.5 kg
b
G2=12 m
Ø6.4 R2=0.6 kg
3.
Refrigerant charge amount=R=R1+R2=0.5+0.6=1.1 kg
Example 2
1.
G1=L1=5 m
G2=L2+L3+L4=17+17+20=54
2.
Over 30 m
a
G1=5 m
R1=0.0kg
b
(G1+G2)–30=(5+54)–30=29
Ø6.4 R2=0.9 kg
3.
Refrigerant charge amount=R=R1+R2=0.0+0.9=0.9 kg
NOTICE
Piping length is the one way length of liquid piping.
Standard liquid pipe size
Connected piping length is between
Model
30~40 m
40~50 m
50~60 m
60~75 m
RZQG71
0.5
1.0
—
—
RZQG100~140
0.5
1.0
1.5
2.0
RZQSG100~140
0.5
1.0
—
—
Size up liquid pipe size
Connected piping length is between
Model
15~20 m
20~25 m
25~30 m
30~35 m
RZQG71
0.5
1.0
—
—
RZQG100~140
0.5
1.0
1.5
2.0
RZQSG100~140
0.5
1.0
—
—
Model
Liquid
piping
Ø
Length exceeding "Chargeless length"
0~5
5~10 10~15 15~20 20~30 30~45
RZQG71
Main
9.5
0.5
1.0
—
—
Branch
6.4
0.3
0.6
—
—
RZQG100~140
Main
9.5
0.5
1.0
1.5
2.0
Branch
9.5
0.5
1.0
1.5
2.0
6.4
0.3
0.6
0.9
1.2
RZQSG100~140
Main
9.5
0.5
1.0
—
—
Branch
6.4
0.3
0.6
—
—
L2=7 (Ø6.4)
50 type
RZQG100 type
L1=35 (Ø9.5)
indoor
L3=5 (Ø6.4)
50 type
outdoor heat pump
L2=17 (Ø6.4)
50 type
indoor
RZQG125 type
L1=5 (Ø9.5)
L3=17 (Ø6.4)
50 type
outdoor heat pump
indoor
L4=20 (Ø6.4)
50 type
NOTICE: Systems with sized-up liquid pipe
Replace 30 m by 15 m in calculations above and use
the table below.
G1: total length of Ø12.7 mm liquid piping.
Model
Liquid piping
Length exceeding
"Chargeless length"
0~5
5~10
10~15
15~20
RZQG71
size-up
0.5
1.0
—
—
RZQG100~140
size-up
0.5
1.0
1.5
2.0
RZQSG100~140
size-up
0.5
1.0
—
—
