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© 2016 Johnson Controls, Inc.
Part No. 64-378-14, Rev. D
Code No. LIT-718050T
A-4400 Series Refrigerated Air Dryers
Installation and Maintenance
64- 378- 14, Rev. D
Technical Bulletin A-4400
Issue Date 0316
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Table of Contents
Related Manuals for Johnson Controls A-4417-1
Summarization of Contents
Introduction to A-4400 Series Refrigerated Air Dryers
Product Overview
Provides a general description of the A-4400 Series Refrigerated Air Dryers and their purpose.
Installation Procedures for A-4400 Air Dryers
Location Requirements
Details the recommended placement and clearance requirements for the air dryer unit.
Unpacking and Handling the Unit
Outlines the step-by-step process for safely removing the air dryer from its shipping carton.
Wall Mounting Arrangement
Describes the procedure and considerations for mounting the unit to a wall using key slots.
Air Connections
Explains how to connect the compressed air line to the unit's inlet air connection.
Base Mounting Arrangement
Details the mounting hole patterns and hardware for securing the unit to a platform.
Activated Carbon Filter Installation
Guides the installation of the separately packaged activated carbon oil vapor removal filter.
Drain Connections
Explains how to connect the drain lines for the condensate drain trap and coalescing oil removal filter.
Permanent Wiring Using Conduit
Provides instructions for converting the unit's power cord to a permanent wired connection.
Wiring to Air Compressor
Details how to wire the air dryer to the air compressor's electrical system for continuous operation.
Commissioning Procedures for Air Dryers
Gauge Correction
Describes how to apply factory calibration corrections to the evaporator pressure gauge for accuracy.
Evaporator Pressure Adjustment
Explains how to adjust the expansion valve to achieve the correct evaporator pressure based on ambient temperature.
Altitude Compensation
Details how to adjust the expansion valve for proper operation at high altitudes.
Low Ambient Temperature Compensation
Guides the adjustment of the expansion valve for optimal performance in low ambient temperatures.
Servicing and Maintenance Procedures
Particle Filter Replacement
Provides instructions for replacing the particle filter element and automatic drain valve.
Coalescing Oil Removal Filter Operation
Explains how the coalescing oil removal filter works and when to replace the element.
Coalescing Oil Removal Filter Element Kit Replacement
Details the steps for replacing the coalescing oil removal filter element.
Activated Carbon Oil Vapor Removal Filter Replacement
Guides the replacement of the activated carbon oil vapor removal filter element.
Pressure Reducing Valve Adjustment
Describes how to adjust the pressure reducing valve for optimal performance.
Power On/Fail Lamp Replacement
Outlines the procedure for replacing the power on/fail indicator lamp.
Refrigeration System Service and Troubleshooting
Covers troubleshooting and adjustments related to the refrigeration system and expansion valve.
Condenser Fan Motor Replacement
Provides step-by-step instructions for replacing the condenser fan motor.
Compressor Motor Wiring Circuit Troubleshooting
Details electrical checks and troubleshooting for the air dryer compressor motor.
Excessive Vibration Diagnosis and Correction
Explains how to diagnose and correct excessive vibration issues, likely related to fan blades.
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