AAON H3 Series, Установка, эксплуатация и обслуживание

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Table 15 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling
Values (Metric)
Table 16 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling
Values (Imperial)
Notes:
1. Microchannel condenser coils are more sensitive to charge. The system must be
running in cooling mode with compressor, supply airflow & condenser fan speed at
full load. The sub-cooling value changes depending on the ambient temperature
reading and the evaporator coil saturation temperature. To find the correct sub-cooling
value, find the ambient temperature on the first column and follow that across to the
SST (4.4-12.8
°
C [40-55°F]).
2. Superheat for Microchannel condenser coils must be between 4.4 and
8.3°C (8 - 15°F).
Checking Evaporator Superheat
Measure the temperature of the suction line
close to the evaporator.
Read gauge pressure at the suction line close
to the evaporator.
Convert the pressure obtained to a saturated
temperature using the appropriate refrigerant
temperature-pressure chart.
Subtract the saturated temperature from the
measured suction line temperature to
determine the evaporator superheat.
Cooling Mode Liquid Sub-Cooling Values(°C)
Ambient
(°C)
Evaporator Coil Saturation Temperature (°C)
4.4 7.2 8.9 10.0 12.8
19.4
5.0 - 7.8 4.4 - 7.2 4.4 - 7.2 3.9 - 6.7 2.8 - 5.6
22.2
5.6 - 8.3 5.0 - 7.8 5.0 - 7.8 4.4 - 7.2 3.9 - 6.7
27.8
5.6 - 8.3 5.6 - 8.3 5.6 - 8.3 5.0 - 7.8 3.9 - 6.7
35.0
5.6 - 8.3 5.6 - 8.3 5.6 - 8.3 5.0 - 7.8 4.4 - 7.2
40.6
6.1 - 8.9 6.1 - 8.9 5.6 - 8.3 5.6 - 8.3 4.4 - 7.2
46.1
5.6 - 8.3 6.1 - 8.9 6.1 - 8.9 6.1 - 8.9 5.0 - 7.8
Cooling Mode Liquid Sub-Cooling Values(°F)
Ambient
(°F)
Evaporator Coil Saturation Temperature (°F)
40 45 48 50 55
67 9 - 14 8 - 13 8 - 13 7 - 12 5 - 10
72 10 - 15 9 - 14 9 - 14 8 - 13 7 - 12
82 10 - 15 10 - 15 10 - 15 9 - 14 7 - 12
95 10 - 15 10 - 15 10 - 15 9 - 14 8 - 13
105 11 - 16 11 - 16 10 - 15 10 - 15 8 - 13
115 10 - 15 11 - 16 11 - 16 11 - 16 9 - 14