Haier AU042FPERA Service Manual page 15

(2) Calculation method of refrigerating capacity----heating capacity to be known=refrigerating
capacity*(A*B*C*D*E*F)W
A. Capacity compensation value of indoor
air dry-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
Liquid pipe ： φ 9.52
Gas pipe ： φ 15.88
0.85
0.80
0 20 40 60 80 100 120 140
Single way pipe length (m)
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.
(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
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
wet-bulb temperature condition
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
-15 -10 -5
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
Total capacity of indoor unit group (%)
F. Capacity compensation value for defrost
capability of outdoor heat exchanger
1.0
0.9
0.8
-15 -10
Outdoor air wet-bulb temperature (°C)
20m 25m 30m 35m
13
0 5 10
40 60 80 100 120 140
-5 0 5
40m 45m 50m
0.03
15
10