16
16
Notes:
• The refrigerant pipe should be thickened when the single way length is over 90m.
• When in cooling mode, outdoor is lower than indoor; or when in heating mode, outdoor is higher than indoor, the
compensation factor should be decreased the below value from the above figure.
(2) Calculation method of refrigerating capacity----heating capacity to be known=refrigerating
capacity*(A*B*C*D*E*F)W
Vertical height drop
between indoor and
outdoor
5m
10m
15m
20m
25m
30m
35m
40m
45m
50m
Adjustment factor
0.003
0.006
0.009
0.012
0.015
0.018
0.021
0.024
0.027
0.030
A. Capacity compensation value of indoor
air dry-bulb temperature condition
C. Capacity modification value under airflow variation
rate of indoor unit group
(only fro duct unit)
B. Capacity compensation value of outdoor air
wet-bulb temperature condition
D. Capacity compensation suitable for
total capability of indoor unit group
E. Capacity compensation value of pipe
length between outdoors
F. Capacity compensation value for defrost
capability of outdoor heat exchanger
1.2
1.2
1.1
1.0
0.9
0.8
15
20
24
Indoor air dry-bulb temperature (
℃
)
1.1
1.0
0.7
0.9
0.6
0.8
0.5
-15
-10
-5
0
Outdoor air wet-bulb temperature (
℃
)
5
10
15
1.1
1.0
0.9
80
90
100
110
120
Airflow variation rate (%)
Capacity modification value
120
100
100 120 140
80
60
40
20
20 40 60 80
0
Total capacity of indoor unit group (%)
Standard
capacity
Capacity modification value
Capacity compensation value
All the modules in the same
Single-way pipe length (m)
1.00
0.98
0.96
0.94
0.92
0.90
0
20 40 60 80 100 120 140 160 180
Capacity compensation value
Outdoor air wet-bulb temperature (
℃
)
1.0
0.9
0.8
-15
-10
-5
0
5
10
