Installation manual

RZQG71~140L + RZQSG100~140L7V1+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"
on page 8. (E.g. twin: L1+L2+L3).
 Over 30 m, please add refrigerant quantity according to
following t
able.
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. T
otal 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. Refr
igerant 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. Refr
igerant 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 t
able below.
 G1: tot
al 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 — —