112
6.3 Frosting Correction Factors of Heating
When the outdoor environment meets certain conditions (temperature and humidity conditions), the
unit may be frosted or defrosted. In this case, the heating capacity of the whole system will be reduced.
Therefore, the frosting correction factor should also be calculated in heating load selection for the whole
system.
The table below provides the frosting correction factors:
Air inlet dry bulb temperature
(
℉
(°C)/RH85%) of the outdoor heat
exchanger
12.2(-11) 15.8(-9)
19.4(-7)
23(-5)
26.6(-3)
32.0(0)
37.4(3)
41.0(5)
44.6(7)
Frosting (defrosting) capacity
correction factor of the whole
system
1.00
0.99
0.98
0.95
0.88
0.86
0.93
0.96
1.00
7
UNIT NOISE CURVES
Outdoor Unit Noise Curve
Noise test method:
Test environment: semi-anechoic room; the noise level will be slightly higher due to change of the
environment during actual operation.
The test points of the following noise curves are shown below:
1m
1m
Unit front
Sampler
8HP noise evaluation curve
NC20
NC30
NC40
NC50
NC60
NC65
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
63
125 250 500 1000 2000 4000 8000
Octave band mid frequency (Hz)
Sound pressure level in octave dB re 20 MP
a
