Install Instructions

20 Air Dryers—A-4400 Series Technical Bulletin
Figure 10: Schematic of A-4400 Series Refrigerated Air Dryer with Service Bypass
Valve Positioned for Normal Operation
(Shown with Optional Factory Mounted Air Purification System)
Figure 11: Schematic of A-4400 Series Refrigerated Air Dryer with Service Bypass
Valve in Bypass Position
(Shown with Optional Factory Mounted Air Purification System)
Line
Voltage
Service
Valve
Heat
Exchanger
Tube-In-Tube
Counterflow
Evaporator
Auto Exp.
Valve
Automatic
Condensate
Drain Trap
Discharge Line
Suction Line
Inlet From
Air Compressor
PRV
With Low
Pressure
Gauge
High Pressure
Output
Regulated
Output
Safety Relief
Valve
Coalescing
Oil Removal
Filter With
Automatic
Drain
Activated
Carbon
Oil Vapor
Removal
Filter
Evaporator
Pressure
Gauge
Condenser
Service Bypass
Valve
Line
Voltage
Service
Valve
Heat
Exchanger
Tube-In-Tube
Counterflow
Evaporator
Auto Exp.
Valve
Automatic
Condensate
Drain Trap
Discharge Line
Suction Line
Inlet From
Air Compressor
PRV
With Low
Pressure
Gauge
High Pressure
Output
Regulated
Output
Safety Relief
Valve
Coalescing
Oil Removal
Filter With
Automatic
Drain
Activated
Carbon
Oil Vapor
Removal
Filter
Evaporator
Pressure
Gauge
Exhaust
Condenser
Service
Bypass
Valve