ZEKS Eclipse 400ZPA - 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

G
gina05Aug 14, 2025
Why does my ZEKS Eclipse 400ZPA have an elevated dew point?
- H
  hardywilliamAug 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.
R
rubioalisonAug 18, 2025
What to do if there is excessive pressure drop in my ZEKS Eclipse 400ZPA Dryer?
- H
  howard01Aug 18, 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.
W
William OwenAug 21, 2025
How to fix a ZEKS Eclipse 400ZPA that fails to shift?
- J
  Joel VegaAug 21, 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.
K
Kevin WilliamsAug 25, 2025
What does it mean if the Blue Moisture Indicator (BMI) on my ZEKS Eclipse 400ZPA indicates a high moisture level?
- C
  Christopher CardenasAug 25, 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.
L
lawrence96Aug 28, 2025
What to do if my ZEKS Eclipse 400ZPA Dryer fails to pressurize?
- K
  Kimberly GarciaAug 28, 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.
P
pwilsonAug 31, 2025
Why does my ZEKS Dryer fail to purge?
- M
  matthew37Aug 31, 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
Jesse BlankenshipSep 3, 2025
Why is my ZEKS Dryer depressurizing too rapidly?
- S
  Shelby TaylorSep 3, 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.
K
Kristina GonzalesSep 7, 2025
How to resolve excessive back pressure in the regenerating tower (above 5 psig) of my ZEKS Eclipse 400ZPA?
- V
  Virginia WongSep 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
Caroline CostaSep 12, 2025
What causes excessively high pressure at the purge gauge on the right tower of my ZEKS Dryer?
- J
  Joseph SmithSep 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

Safety and Operation Precautions

Principles of Operation

Drying Cycle Explained

Explains how compressed air is dried by adsorption in one tower.

Regeneration Cycle Process

Details the process of removing moisture from the desiccant material.

Setting Regeneration Air Flow

Provides instructions on adjusting purge air flow for optimal dryer performance.

Principles of Operation (Continued)

Timing Sequence for Dryer Cycles

Details the timing cycles for -40°F, -80°F, and -100°F dew point dryers.

Alarms and Indicators Overview

Failure-to-Shift Alarm

Describes the optional alarm for switching valve failures and its indication.

High Humidity Alarm

Moisture Load Control Feature

Installation and Start-Up Guide

Application and Check Analysis

Filtration Importance

Electrical Connection Requirements

Installation and Start-Up Guide (Continued)

Initial Start-Up Procedures

Guides the user through the initial start-up process, including leak checks and settings.

Maintenance and System Check Schedule

Scheduled Maintenance Tasks

Lists daily, semi-annual, and annual maintenance tasks for optimal dryer operation.

Prefilters and Afterfilters Maintenance

Pilot Air Valves and Filter Maintenance

Maintenance and System Check Schedule (Continued)

Desiccant Changeout Procedure

Details the process for replacing the desiccant material in the dryer towers.

Troubleshooting Common Dryer Issues

Wiring Diagram for NEMA-1 Dryers

Wiring Diagram for NEMA-4 Dryers

Flow Diagram of Dryer Operation

Flow Diagram of Dryer Operation (Continued)

Replacement Parts Diagram

Replacement Parts Diagram (Continued)

Replacement Parts List

ZEKS Eclipse 400ZPA Specifications

General

Brand	ZEKS
Model	Eclipse 400ZPA
Category	Dryer
Language	English

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