AAON CF Series - Table 17 - Demand Signal Vs. Compressor Capacity Modulation

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P6 Pressure Output +
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 Variable Capacity Unloader Solenoid
V1 & V2 Vapor Injection Solenoid
The compressor controller modulates the
compressor unloader solenoid in an on/off
pattern according 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 also protects the
compressor against high discharge
temperature. Refer to Table 19 for the
relationship between thermistor temperature
readings and resistance values.
Table 18 - 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%
COMPRESSOR CONTROLLER
To avoid damaging the compressor
controller, DO NOT connect wires to
terminals C3, C4, T3, T4, T5, or T6.
WARNING