Capacity Calculation Due To Capacity Modification Coefficient - Haier AU042FPERA Service Manual

6. Capacity Calculation Due to Capacity Modification Coefficient

(1) Calculation method of refrigerating capacity----cooling capacity to be known=refrigerating
capacity*(A*B*C*D*E)W
A. Capacity compensation value of indoor
air wet-bulb temperature condition
1.2
1.1
1.0
0.9
0.8
15 20
Indoor air dry-bulb temperature (°C )
C. Capacity modification value under airflow variation
rate of indoor unit group (only for duct unit)
1.1
1.0
0.9
80 90 100
Airflow variation rate (%)
E. Capacity compensation value of pipe length, pipe diameter and height drop
1.00
0.95
0.90
0.85
0.80
Notes for E:
Notes for E:
(1) The main pipe (from outdoor to the first branch pipe) diameter should be enlarged one size
when the single way pipe length is over 90m.
(1) The mian pipe (from outdoor to the first branch pipe) diameter should be enlarged one size
(2) When in cooling mode, outdoor is lower than indoor; or when in heating mode, outdoor is higher than indoor, the
when the single way pipe length is over 90m.
compensation factor should be decreased the below value from figure E.
(2) 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 figure E.
Vertical height drop between
indoor and outdoor
Adjustment factor
24
110 120
Liquid pipe ： φ 12.7
Gas pipe ： φ 19.05
Liquid pipe ： φ 9.52
Gas pipe ： φ 15.88
0 20 40 60 80 100 120 140
Single way pipe length (m)
5m 10m 15m
0.003 0.006 0.009 0.012 0.015 0.018 0.021 0.024 0.027
B. Capacity compensation value of outdoor
air dry-bulb temperature condition
1.2
1.1
1.0
0.9
-5 0 5 10
Outdoor air wet-bulb temperature (°C )
D. Capacity compensation suitable for
total capability of indoor unit group
120
100
80
60
40
20
0 20
40
Total capacity of indoor unit group (%)
20m 25m 30m 35m
12
15 20 25 30 35
60 80 100 120 130
40m 45m 50m
0.03
40 43