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Aircel DHT-40 - User Manual

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VF Series | Non-Cycling | 10 - 2,000 scfm
DHT Series | High Inlet Temperature | 20 - 125 scfm
AES Series | Energy Saving Digital Scroll | 600 - 10,000 scfm
REFRIGERATED DRYER USER MANUAL
The information in this manual is current as of its publication date and applies to VF, DHT, and AES Series refrigerated air dryers until next revision of this manual.
Copyright © December 2017 Aircel, LLC. All rights reserved.
WARRANTY NOTICE
Failure to follow the instructions
and procedures in this manual, or
misuse of this equipment, will void its
warranty.
WARNING!
Users are required to read the entire
User Manual before handling or using
the product. Keep the User Manual in
a safe place for future reference.

Table of Contents

Other manuals for Aircel DHT-40

Preview: Installation And Operation Manual
Installation And Operation Manual36 pages

Questions and Answers

  • K
    kennedytylerAug 6, 2025
    What to do if there is water downstream of my Aircel DHT-40 Dryer system?
    • O
      Oscar RobinsonAug 6, 2025
      If you notice water downstream of your Aircel Dryer system, several issues could be the cause. First, the timer drain or drain solenoid may have failed; in this case, replace the timer drain. Another potential cause is bulk liquid entering the dryer from upstream. Check the drains on the after cooler or air compressor. Also, verify that the inlet compressed air temperature and CFM flow rate meet the dryer system's specifications. A leak in the heat exchanger could also be responsible, requiring its replacement.
  • J
    James FernandezAug 11, 2025
    How to fix failed drain solenoid in Aircel DHT-40 Dryer?
    • C
      Carolyn PerezAug 11, 2025
      If the drain solenoid in your Aircel Dryer has failed, replace the timer drain.
  • M
    Matthew ParkerAug 15, 2025
    How to fix failed or short circuited timer on drain in Aircel DHT-40 Dryer?
    • N
      Natalie HowardAug 16, 2025
      If the timer on the drain of your Aircel Dryer has failed or short-circuited, replace the timer drain.
  • C
    Cathy ChavezAug 20, 2025
    What to do if the refrigeration compressor is overheated in Aircel Dryer?
    • C
      Cody SuarezAug 21, 2025
      If the refrigeration compressor in your Aircel Dryer is overheated, turn off the dryer and wait 20 to 40 minutes before restarting it.
  • C
    Christopher GardnerAug 27, 2025
    What to do if my Aircel Dryer system is not working properly and there is water downstream?
    • J
      John PopeAug 27, 2025
      If your Aircel Dryer system isn't working correctly and there's water downstream, several factors could be at play. The refrigeration compressor might be stopping because of a dirty condenser coil, leading to high pressure, so you should clean the condensing coil and make sure the unit has enough ventilation. Another reason could be the refrigeration compressor cycles on and off and can't keep suction pressure, in that case, inspect the condensing coil for any obstructions. If clear, use refrigerant pressure gauges to see if the unit is low on refrigerant. Also consider the possibility of low refrigerant levels, possibly due to a leak in the air-to-refrigerant side of the heat exchanger, so you should repair or replace the heat exchanger and recharge the system according to specifications.
  • D
    donna86Aug 31, 2025
    Why is there water downstream of my Aircel Dryer system or no discharge from the separator/filter?
    • B
      Brian BrownAug 31, 2025
      There are several reasons why you might find water downstream of your Aircel Dryer system or a lack of discharge from the separator/filter. It could be due to a failed or short-circuited timer on the drain or a failed drain solenoid, in which case you should replace the timer drain. Another cause may be bulk liquid entering the dryer from upstream, so check the drains on the aftercooler or air compressor. Also, verify that the inlet compressed air temperature and CFM flow rate to the dryer do not exceed the dryer's capacity; adjust as needed to meet specifications. A leak in the air-to-air heat exchanger can also cause this issue, requiring replacement of the heat exchanger.

Summary

SECTION 1: SAFETY

1.1 Introduction

General overview of safety importance for dryer operation and maintenance.

1.2 Safety Signal Words

Defines warning symbols (Danger, Warning, Caution, Notice) used in the manual.

1.3 General Safety Procedures

Outlines essential safety practices for dryer installation, operation, and maintenance.

1.4 Refrigerant Safety Precautions

Specific safety measures for handling refrigerants, including inhalation and skin contact.

1.5 Implementation of Lockout;Tagout

Procedures for safely de-energizing equipment before servicing.

SECTION 2: DESCRIPTION

2.1 Introduction

Overview of refrigerated dryer function and purpose in protecting air systems.

2.2 System

Describes the overall dryer system components and operational flow.

2.3 Refrigeration Circuit

Details the closed-loop refrigerant cycle and its components.

2.4 Compressed Air Circuit

Explains the path of compressed air through the dryer's heat exchangers.

2.5 Digital Scroll Compressor

Focuses on the AES series compressor technology and its modulation.

SECTION 3: INSTALLATION

3.1 Inspection on Arrival

Steps to check the dryer for damage and verify specifications upon delivery.

3.2 Lifting Information

Guidelines and warnings for safely moving and handling the dryer unit.

3.3 Installation Codes and Procedures

Requirements for safe and compliant installation, including electrical and piping.

3.4 Locating and Installing the Dryer

Recommendations for dryer placement, clearance, and foundation.

3.4.1 Air-Cooled Condenser Requirements

Specifies environmental and airflow conditions for air-cooled condensers.

3.4.2 Cooling Water Requirements

Specifies water flow and pressure for water-cooled condensers.

3.5 Preliminary Start-Up Checklist

Pre-operation checks before powering up the dryer system.

3.6 Automatic Drain Valve Adjustments

How to adjust automatic drain valves for optimal condensate removal.

3.7 Zero Loss Condensate Drain

Description of zero loss drain features and operation.

SECTION 4: OPERATION

4.1 Operating Procedures

General steps for running the dryer and understanding its automatic functions.

4.2 Short-Term Shut Down

Procedures for overnight or weekend shutdowns of the dryer.

4.3 Shut Down Emergency

Steps for performing an emergency shutdown of the dryer system.

SECTION 5: CONTROLLERS (AES SERIES)

5.1 Home Screen

Description of the main display interface showing critical operating conditions.

5.2 Status Screen

Information on compressor, fan, total hours, and savings.

5.3 Information Screen

Details on performance alert codes and alarm indications.

5.4 Alarm Screen

Visual representation of system alarms, indicating status with color.

5.5 Alarm Log Screen

History of system alarms, including message, time, and date.

5.6 Diagnostics Screen

Information on communication errors or major HMI faults.

5.7 Alarm Banner Screen

Real-time display of active alarms at the top of the screen.

SECTION 6: MAINTENANCE

6.1 Introduction

Importance of maintenance for satisfactory operation and optimum performance.

6.2 Routine Maintenance Schedule

Covers daily and weekly inspection tasks for dryer upkeep.

6.3 Filter Element Replacement

Step-by-step instructions for replacing filter elements.

SECTION 7: TROUBLESHOOTING

7.1 Introduction

Identifying common issues and the systematic approach to analysis.

7.2 Electrical Troubleshooting

Diagnosing and resolving electrical problems with the dryer system.

7.3 Refrigeration Troubleshooting

Diagnosing and resolving issues within the refrigeration circuit.

7.4 Condensate Removal Issues

Troubleshooting problems related to condensate drainage.

7.5 Other Troubleshooting Topics

Addressing non-specific operational issues like water or oil problems.

7.6 VF & DHT Series Troubleshooting

Specific troubleshooting guide for VF and DHT dryer models.

7.7 AES Series Troubleshooting

Specific troubleshooting guide for AES dryer models.

7.8 AES Series Performance Alert Codes

Explanation of specific alert codes displayed on AES series controllers.

APPENDIX A: SPECIFICATIONS

A.1 VF Series Specifications

Technical data, including pressure, temperature, and refrigerant readings for VF models.

A.2 DHT Series Specifications

Technical data, including pressure, temperature, and refrigerant readings for DHT models.

A.3 AES Series Specifications

Technical data, including pressure, temperature, and refrigerant readings for AES models.

APPENDIX B: WIRING DIAGRAMS

B.1 VF Series Wiring Diagrams

Electrical schematics for VF series dryer models.

B.2 DHT Series Wiring Diagrams

Electrical schematics for DHT series dryer models.

B.3 AES Series Air-Cooled Wiring

Electrical schematics for AES series air-cooled dryer models.

B.4 AES Series Water-Cooled Wiring

Electrical schematics for AES series water-cooled dryer models.

APPENDIX C: MATERIAL SAFETY DATA SHEETS

C.1 R-134 a Refrigerant MSDS

Safety data sheet for R-134a refrigerant, including hazards and first aid.

C.2 R-404 a Refrigerant MSDS

Safety data sheet for R-404a refrigerant, including hazards and first aid.

WARRANTY INFORMATION

Aircel DHT-40 Specifications

General IconGeneral
BrandAircel
ModelDHT-40
CategoryDryer
LanguageEnglish

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