Table 10 - Acceptable Fin & Tube Air-Cooled Condenser Coil Refrigeration Circuit Values; Table 11 - Acceptable Water-Cooled Refrigeration Circuit Values; Table 12 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-Cooling Values - AAON RN Series Installation Operation & Maintenance

Convert the pressure obtained to a saturated
temperature using the appropriate refrigerant
temperature-pressure chart.
Subtract the saturated temperature from the
measured suction
determine the evaporator superheat.
Compare calculated superheat to the tables
below for the appropriate coil and system
type and options.
CAUTION
Expansion valve must be adjusted to
approximately 8-15°F
superheat. Failure to have sufficient
superheat will
compressor and void the warranty.
Table 12 - Acceptable Microchannel Air-Cooled Condenser Coil Liquid Sub-
Ambient
(°F)
105
115
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 microchannel 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 (40-55°F).
2. Superheat for Microchannel condenser coils must be between 8 - 15°F
52
line temperature
of suction
damage the
Cooling Mode Liquid Sub-Cooling Values(°F)
Evaporator Coil Saturation Temperature (°F)
40
67 9 - 14
72 10 - 15
82 10 - 15
95 10 - 15
11 - 16
10 - 15
Table 10 - Acceptable Fin & Tube Air-
Cooled Condenser Coil Refrigeration Circuit
Air-Cooled Cond./Air-Source Heat
to
Sub-Cooling
Sub-Cooling
with Hot Gas
Reheat
Superheat
Table 11 - Acceptable Water-Cooled
Refrigeration Circuit Values
Water-Cooled Cond./Water
Sub-Cooling
Superheat
Cooling Values
45 48
8 - 13 8 - 13
9 - 14 9 - 14
10 - 15 10 - 15
10 - 15 10 - 15
11 - 16 10 - 15
11 - 16 11 - 16
Values
Pump
In Cooling Mode
8-15°F / 2-4°F (HP)*
8-15°F /2-6°F (HP)*
8-15°F
Source Heat Pump
In Cooling Mode
4-8°F
8-15°F
50
7 - 12
8 - 13
9 - 14
9 - 14
10 - 15
11 - 16
55
5 - 10
7 - 12
7 - 12
8 - 13
8 - 13
9 - 14