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5. Fine-tune system with more detailed calculations in
Xpress.
NOTICE
The total refrigerant charge amount in the system MUST
always be lower than the number of connected indoor units
×15.96 [kg], with a maximum of 63.84 kg.
E.g. In a system with one indoor unit, the maximum
refrigerant charge amount is: 1×15.96=15.96 kg.
Example 1:
Area [m²]
Installation height [m]
Lowest underground floor
Other floors
Charge limit [kg]
System charge limit [kg]
System charge [kg]
Judgement
b
A
b
a
B
b
b
C
D
a
Outdoor unit
b
Indoor unit
A/B/C/D
Room A/B/C/D
Example 2:
Area [m²]
Installation height [m]
Lowest underground floor
Other floors
Charge limit [kg]
System charge limit [kg]
System charge [kg]
Judgement
b
A
b
a
B
b
b
C
D
a
Outdoor unit
b
Indoor unit
A/B/C/D
Room A/B/C/D
RXYSA4~6A7V/Y1B
VRV 5-S system air conditioner
4P600329-1E – 2023.02
VRV
Room
A
B
C
D
20
30
50
50
3.5
2.2
1.8
2.5
—
—
●
●
●
●
—
—
15.7
15.1
16.9
19.2
15.1
16.0
Room
A
B
C
D
10
20
10
20
3.0
2.2
3.0
2.2
—
—
●
●
●
●
—
—
9.0
11.8
5.4
6.8
5.4
5.0
12 Special requirements for R32 units
Example 3:
Area [m²]
Installation height [m]
Lowest underground floor
Other floors
Charge limit [kg]
System charge limit [kg]
System charge [kg]
Judgement
b
a
A
a
Outdoor unit
b
Indoor unit
A/B
Room A/B
Example 4:
Area [m²]
Installation height [m]
Lowest underground floor
Other floors
Charge limit [kg]
System charge limit [kg]
System charge [kg]
Judgement
b
b
a
A
a
Outdoor unit
b
Indoor unit
A/B
Room A/B
Room
A
B
20
30
2.5
2.5
—
—
●
●
—
16.5
16.5
14.0
B
Room
A
B
8
20
2.5
2.5
—
—
●
●
6.0
12.7
6.0
12.0
B
Installation and operation manual
21
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Troubleshooting
