Haier AU042FPERA - Page 15

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(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
C. Capacity modication value under airow variation
rate of indoor unit group (only for 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, pipe diameter and height drop
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 (°C)
1.1
1.0
0.7
0.9
0.6
0.8
0.5
-15 -10 -5 0
Outdoor air wet-bulb temperature (°C)
5
10 15
1.1
1.0
0.9
80 90 100 110 120
Airow variation rate (%)
Capacity modication value
120
100
100 120 140
80
60
40
20
20
40 60 80
0
Total capacity of indoor unit group (%)
Standard capacity
Capacity modication value
Capacity compensation value
Outdoor air wet-bulb temperature (°C)
1.0
0.9
0.8
-15 -10 -5 0 5 10
0.95
1.00
0.90
0.85
0.80
0 20 40 60 80 100 120 140
Capacity modification value
Single way pipe length (m)
Liquid pipe
： φ12.7
Gas pipe
： φ19.05
Liquid pipe：
φ9.52
Gas pipe：
φ
15.88
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 0.03
Notes for E:
(1) The main pipe (from outdoor to the rst 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 gure E.