ZEKS Eclipse 1200ZPA - User Manual

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TECHNICAL MANUAL

ZEKS Compressed Air Solutions

1302 Goshen Parkway

West Chester, PA 19380

Phone: 610-692-9100

800-888-2323

Fax: 610-692-9192

Web: www.zeks.com

Form: ZEKS ZPA NEMA 1 V0813

ZPA Heatless Purge

Desiccant Compressed Air Dryer

90-5000 scfm

NOTICE

Those operating the machine or performing

maintenance should read and understand

the decals positioned on the machine and

the contents of this Technical Manual.

Ensure that this Technical Manual is not

removed permanently from the machine.

Questions and Answers

C
Charles DanielsAug 15, 2025
Why does my ZEKS Dryer have an elevated dew point?
- J
  John MeltonAug 15, 2025
  An elevated dew point in your ZEKS Dryer can stem from several causes. It may be due to an insufficient purge rate, so check the purge flow settings and piping for obstructions, cleaning the piping and muffler if needed. Also, inlet air pressure below the design condition, a flow rate higher than the design condition, or an inlet temperature exceeding 120F can contribute to this issue. Check the pressure source and system for leaks, verify the flow rate, and inspect/service the aftercooler. Finally, entrained water entering the desiccant bed or desiccant contaminated by oil could be the reason. In this case, check the air/moisture separator, prefilter, and drains, replacing the dryer desiccant if necessary. Consider installing a suitable prefilter.
K
Katrina ClarkAug 19, 2025
What to do if there is excessive pressure drop in my ZEKS Eclipse 1200ZPA Dryer?
- M
  Mr. Jeffrey WestAug 19, 2025
  If you're experiencing an excessive pressure drop in your ZEKS Dryer, it could be due to an excessive flow rate. Check the flow rate and determine the cause for the increased air demand. Alternatively, the inlet pressure may be below the design condition, so you should check the pressure source.
J
Jonathan ObrienAug 22, 2025
How to fix a ZEKS Eclipse 1200ZPA Dryer that fails to shift?
- M
  michelle29Aug 22, 2025
  If your ZEKS Dryer isn't shifting, begin by checking the power input to ensure there's no issue with the power supply. Then, inspect the solenoid valve for any defects. Also, verify that there is pilot air by checking the pilot air line and ensuring the control air line filter is clean. Lastly, inspect the pilot-operated diaphragm valve seat for failure, replacing seals as needed.
T
Tommy RamseyAug 26, 2025
What does it mean if the Blue Moisture Indicator (BMI) on my ZEKS Dryer indicates a high moisture level?
- S
  Sara RamirezAug 26, 2025
  If the Blue Moisture Indicator (BMI) on your ZEKS Dryer indicates a high moisture level, it could be due to an elevated dew point. Refer to the corrective actions for 'Elevated Dew Point'. Also, if the BMI is wet, depending on the desiccant saturation, it could take a week or more of continuous use for it to switch back to its blue (dry) state.
J
Joel ChristianAug 28, 2025
What to do if my ZEKS Eclipse 1200ZPA fails to pressurize?
- T
  Terry JonesAug 29, 2025
  If your ZEKS Dryer fails to pressurize, it may be due to a faulty purge valve. Check that the repressurization circuit is sending a control signal and inspect the purge valve and its solenoid valve.
D
Derrick BrownSep 1, 2025
Why does my ZEKS Dryer fail to purge?
- J
  Jeffrey WilliamsSep 1, 2025
  If your ZEKS Dryer fails to purge, it could be because the purge valve does not open or is stuck in the closed position. Check the purge valve and its solenoid valve, repairing or replacing them if necessary. Also, verify that the repressurization circuit is sending a control signal.
J
Jennifer HillSep 4, 2025
Why is my ZEKS Dryer depressurizing too rapidly?
- I
  Isabella BrownSep 4, 2025
  If your ZEKS Dryer is depressurizing too rapidly, it could be that the purge valve doesn't close, and the dryer is repressurizing through the inlet valve. Check the purge valve and its solenoid valve.
G
Gabriel CummingsSep 7, 2025
How to resolve excessive back pressure in the regenerating tower (above 5 psig) of my ZEKS Dryer?
- R
  Robert KellySep 7, 2025
  Excessive back pressure in the regenerating tower (above 5 psig) of your ZEKS Dryer can occur if the purge muffler does not pass air, indicating it is dirty and needs replacement. Alternatively, it could be that the purge muffler passes too much air because air is leaking across the valve. In this case, check the inlet valve and outlet check valves, and verify that the inlet valve is closed to the purging tower (0 psig tower).
C
courtneyallisonSep 12, 2025
What causes excessively high pressure at the purge gauge on the right tower of my ZEKS Dryer?
- B
  Brandy HayesSep 12, 2025
  An excessively high pressure reading at the purge gauge on the right tower of your ZEKS Dryer may be due to improper calibration. Reset the gauge when the right tower is online.

Summary

5.0 Safety and Operation Precautions

6.0 Principles of Operation

6.2 Drying Cycle

Details the process of compressed air entering and being dried in a tower.

6.3 Regeneration Cycle

Explains how moisture is removed from the desiccant material in the offline tower.

7.0 Alarms and Indicators

8.0 Installation and Start-Up

8.1 Application and Check Analysis

Checks design and installation requirements for optimal dryer performance.

8.7 Start-Up

Step-by-step guide for initial dryer start-up and verification.

8.4 Filtration

Emphasizes the importance of prefilters and afterfilters for dryer protection.

9.0 Maintenance and System Check

9.1 Scheduled Maintenance

Outlines daily, semi-annual, annual, and bi-annual maintenance tasks.

9.2 Prefilters and Afterfilters

Maintenance recommendations for prefilters and afterfilters.

9.7 Desiccant Changeout Procedure

Step-by-step guide for replacing desiccant material in the towers.

10.0 Troubleshooting

13.0 Wiring Diagram

14.0 Flow Diagram

17.0 Replacement Parts Diagram

18.0 Replacement Parts List

Summary

5.0 Safety and Operation Precautions

6.0 Principles of Operation

6.2 Drying Cycle

Details the process of compressed air entering and being dried in a tower.

6.3 Regeneration Cycle

Explains how moisture is removed from the desiccant material in the offline tower.

7.0 Alarms and Indicators

8.0 Installation and Start-Up

8.1 Application and Check Analysis

Checks design and installation requirements for optimal dryer performance.

8.7 Start-Up

Step-by-step guide for initial dryer start-up and verification.

8.4 Filtration

Emphasizes the importance of prefilters and afterfilters for dryer protection.

9.0 Maintenance and System Check

9.1 Scheduled Maintenance

Outlines daily, semi-annual, annual, and bi-annual maintenance tasks.

9.2 Prefilters and Afterfilters

Maintenance recommendations for prefilters and afterfilters.

9.7 Desiccant Changeout Procedure

Step-by-step guide for replacing desiccant material in the towers.

10.0 Troubleshooting

13.0 Wiring Diagram

14.0 Flow Diagram

17.0 Replacement Parts Diagram

18.0 Replacement Parts List

ZEKS Eclipse 1200ZPA Specifications

General

Brand	ZEKS
Model	Eclipse 1200ZPA
Category	Dryer
Language	English

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