Air Dryers—A-4400 Series Technical Bulletin 9
Wiring may be run through the load side of the air compressor disconnect
switch ahead of the Pressure Electric (PE) switch, as illustrated in
Figure 4. Doing so will allow continuous A-4400 operation whenever the
disconnect switch is closed, while control over the air compressor is
retained by the PE switch.
Note: The air dryer motor voltage must match the air compressor motor
voltage in order to wire the unit as illustrated in Figure 4.
Figure 4: Single-Phase Air Compressor Motor
Compressor
115 VAC
60 Hz
Air Compressor
Disconnect
Pressure
Switch
Air Compressor
Air
Dryer
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