Calculating The Additional Refrigerant Charge - Daikin RZQG71L8V1B Installation Manual

12.3. Calculating the additional refrigerant charge

NOTICE
Piping length is the one way length of liquid piping.
 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" on
. (E.g. twin: L1+L2+L3).
page 8
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>
Connected piping length is between
Model 30~40 m
RZQG71 0.5
RZQG100~140 0.5
RZQSG100~140 0.5
Connected piping length is between
Model 15~20 m
RZQG71 0.5
RZQG100~140 0.5
RZQSG100~140 0.5
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>
Liquid
Model piping Ø
Main 9.5
RZQG71
Branch 6.4
Main 9.5
RZQG100~140 9.5
Branch
6.4
Main 9.5
RZQSG100~140
Branch 6.4
RZQG71~140L + RZQSG100~140L
Split system air conditioners
4P339538-1A – 2014.03
Standard liquid pipe size
40~50 m 50~60 m 60~75 m
1.0 —
1.0 1.5 2.0
1.0 —
Size up liquid pipe size
20~25 m 25~30 m 30~35 m
1.0 —
1.0 1.5 2.0
1.0 —
Length exceeding "Chargeless length"
0~5 5~10 10~15 15~20 20~30 30~45
0.5 1.0 —
0.3 0.6 —
0.5 1.0 1.5
0.5 1.0 1.5
0.3 0.6 0.9
0.5 1.0 —
0.3 0.6 —
Example 1
RZQG100 type
outdoor heat pump
1. G1=L1=35 m
2. Over 30 m
a G1–30=5 m
b G2=12 m
3. Refrigerant charge amount=R=R1+R2=0.5+0.6=1.1 kg
Example 2
—
RZQG125 type
—
outdoor heat pump
—
1. G1=L1=5 m
2. Over 30 m
—
a G1=5 m
b (G1+G2)–30=(5+54)–30=29
3. Refrigerant charge amount=R=R1+R2=0.0+0.9=0.9 kg
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
RZQG71
RZQG100~140
RZQSG100~140
—
—
2.0
2.0
1.2
—
—
L2=7 (Ø6.4)
L1=35 (Ø9.5)
L3=5 (Ø6.4)
G2=L2+L3=7+5=12
 Ø9.5 R1=0.5 kg
 Ø6.4 R2=0.6 kg
L2=17 (Ø6.4)
L1=5 (Ø9.5) L3=17 (Ø6.4)
L4=20 (Ø6.4)
G2=L2+L3+L4=17+17+20=54
 R1=0.0kg
 Ø6.4 R2=0.9 kg
Length exceeding
"Chargeless length"
Liquid piping 0~5 5~10
size-up 0.5 1.0
size-up 0.5 1.0
size-up 0.5 1.0
50 type
indoor
50 type
50 type
indoor
50 type
indoor
50 type
10~15 15~20
— —
1.5 2.0
— —
Installation manual
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