AAON RQ NextGen Series, Installation Operation & Maintenance

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T1 & T2 Discharge Temperature
Sensor
High Voltage Terminals
A1 & A2 Alarm Relay Out
M1 & M2 Contactor
L1 Control Voltage N
L2 Control Voltage L
U1 & U2 Digital Unloader Solenoid
V1 & V2 Vapor Injection Solenoid
The compressor controller modulates the
compressor unloader solenoid in an on/off
pattern according to the capacity demand
signal of the system. The following table
shows the linear relationship between the
demand signal and compressor capacity
modulation. The compressor controller
protects the compressor against high
discharge temperature. Refer to Appendix B
for the relationship between thermistor
temperature readings and resistance values.
Table 22 - Demand Signal vs. Compressor Capacity Modulation
Demand
Signal (VDC)
Loaded % Unloaded % Time Loaded
Time
Unloaded
% Compressor
Capacity
1.00 Off Off Off Off 0%
1.44 10% 90% 1.5 sec 13.5 sec 10%
3.00 50% 50% 7.5 sec 7.5 sec 50%
4.20 80% 20% 12 sec 3 sec 80%
5.00 100% 0% 15 sec 0 sec 100%
Figure 30 - Compressor Controller Flash Code Details