Ingersoll-Rand EH 800 User Manual

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EH Series Desiccant Dryer

Models 150-8000

Operator’s Manual

Manual Del Operador

ES

Manual do Operador

PT

Manuel De L’opérateur

FR

Operator’s Manual

EN

December 2013

PRINT LANGUAGE

ENGLISH

FRENCH

PORTUGUESES

SPANISH

Table of Contents

Questions and Answers:

C
Carl Dixon MDAug 14, 2025
Why does my Ingersoll-Rand EH 800 Dryer have an elevated dew point?
- K
  Kayla RobertsAug 14, 2025
  If your Ingersoll-Rand Dryer has an elevated dew point, several factors could be the cause. It might be due to an insufficient purge rate, so you should check the purge flow settings and piping for obstructions, cleaning them as necessary. Low inlet air pressure could also be the culprit, so verify the pressure source. Other potential causes include a flow rate higher than the design condition (check the flow rate), an inlet temperature exceeding the design condition (inspect and service the aftercooler), water entering the desiccant bed (check the air/moisture separator and pre-filter, replacing the desiccant if needed), or desiccant contaminated by oil (install a pre-filter and replace the desiccant).
R
Robert WoodAug 17, 2025
What to do if Ingersoll-Rand Dryer fails to shift?
- A
  Amanda BarnesAug 17, 2025
  If your Ingersoll-Rand Dryer fails to shift, begin by checking the power input. If that's not the issue, inspect the no-loss drain valve, pilot air line, control air line filter, and regulator setpoint. Also, check the pressure switch, ensuring it opens above 65 psig and closes below 40 psig.
S
Shelley AtkinsAug 21, 2025
Why is there excessive pressure drop in my Ingersoll-Rand EH 800?
- S
  Sarah JamesAug 21, 2025
  An excessive pressure drop in your Ingersoll-Rand Dryer can be caused by an excessive flow rate. In this case, check the flow rate and determine the cause for the increased air demand. Also, check the pressure source, because the inlet pressure may be below the design condition.
B
bmeyerAug 25, 2025
How to fix Heater High Temp. Alarm (Heater runs continuously) in Ingersoll-Rand EH 800 Dryer?
- D
  Deanna BrownAug 26, 2025
  If your Ingersoll-Rand Dryer's heater is running continuously and triggering a high-temperature alarm, the contactor might be stuck closed, in which case you should replace it. Other potential causes include a defective thermocouple or temperature control, which would also require replacement.
S
Stephanie NicholsAug 28, 2025
What to do if Ingersoll-Rand Dryer fails to pressurize?
- B
  bennettlaurieAug 28, 2025
  If your Ingersoll-Rand Dryer fails to pressurize, you should check the purge valve and its no-loss drain valve. Also, ensure that the repressurization circuit is sending a control signal.
S
Scott RothSep 1, 2025
What to do if Ingersoll-Rand EH 800 Dryer fails to depressurize?
- R
  Rodney BryanSep 1, 2025
  If your Ingersoll-Rand Dryer fails to depressurize, it could be due to the purge valve not opening or being stuck in the closed position. Check the no-loss drain valve, and repair or replace it if necessary.
J
jacqueline15Sep 5, 2025
Why is there excessive back pressure in regenerating tower in my Ingersoll-Rand EH 800 Dryer?
- B
  Bianca WilliamsSep 5, 2025
  Excessive back pressure in the regenerating tower (above 5 PSIG) in your Ingersoll-Rand Dryer can be caused by air leaking across the valve. Check the inlet valve and verify that it is closed to the purging tower (0 PSIG tower).
B
Brooke ThomasSep 9, 2025
What causes excessively high pressure at the purge gage in Ingersoll-Rand Dryer?
- V
  vjenkinsSep 9, 2025
  If the pressure at the purge gauge is excessively high in your Ingersoll-Rand Dryer, it may be due to improper calibration. Check the gauge against tower gauges when in switching sequence, and replace the gauge as required.

Ingersoll-Rand EH 800 Specifications

General

Brand	Ingersoll-Rand
Model	EH 800
Category	Dryer
Language	English

Summary

Receiving, Inspection, and Safety Precautions

6.0 Safety and Operation Precautions

Essential safety rules and precautions for operating the dryer.

Principles of Operation

7.0 Principles of Operation Introduction

Explains how water vapor is removed from compressed air using desiccant.

7.1 Introduction to Principles

Explains the basic process of air drying and regeneration.

7.2 Drying Cycle

Details the process of air passing through the desiccant tower.

7.3 Regeneration Cycle

Describes how adsorbed moisture is removed from the desiccant.

7.3.2 Heated Purge Regeneration

7.3.3 Heatless Pressure Swing Regeneration

7.4 Tower Repressurization

7.4.1 Heated Purge Repressurization

7.4.2 Heatless Pressure Swing Repressurization

7.6 Controls Overview

7.6.1 Microprocessor Control User Interface

Control Panel Buttons

7.6.2 Status Panel User Interface

7.6.3 Microprocessor Display Parameters

7.7 Timing Sequence

7.7.1 Heated Purge Timer Cycle

7.7.2 Heatless Pressure Swing Timer Cycle

Alarms and Indicators

8.2 Heater High Temperature Alarm

Details the high heater temp alarm and its interlock function.

8.3 Heater Failure Alarm

Explains the alarm triggered if the heater fails to generate heat.

8.4 Failure to Shift Alarm

Alarm indicating issues with the dryer's tower switching function.

8.4.1 Failure to Repressurize

Specific failure mode for repressurization.

8.4.2 Failure to Depressurize

Specific failure mode for depressurization.

8.5 High Dew Point Alarm (with EMS)

Alarm for failing to meet the designed pressure dew point.

8.8 Alarm List Access

How to access and review the 20 most recent alarm conditions.

Alarm List Display Explanation

Explains the format and content of the alarm list display.

Technician Mode Operations

9.0 Technician Mode Overview

9.1 Entering Technician Mode

9.2 Operating Mode (Bi-Mode)

9.3 Heater Temperature Setpoint

9.10 Shutdown Sequence

Installation and Start-Up Procedures

10.1 Equipment Application Guidelines

Information on dryer operating range and air supply requirements.

10.2 Locating and Mounting

Recommendations for dryer placement and mounting.

10.3 Piping and Exhaust

Guidance on connecting compressed air lines and exhaust piping.

10.4 Filtration Requirements

Importance of pre-filters and post-filters for dryer protection.

10.6 Electrical Connection

Requirements for proper electrical connections and grounding.

10.7 Start-Up Procedure

Procedure for initial dryer start-up and leak testing.

10.8 Shut Down Procedures

Procedures to properly shut down the heat reactivated dryer.

Caution: Shutdown During Heating Cycle

Warning about shutting down during the heating cycle.

Notice: Power Removal Precaution

Initiate shutdown sequence before power removal.

Maintenance and System Check

11.1 Scheduled Maintenance

Schedule for daily, monthly, quarterly, semi-annual, and annual tasks.

11.2 Pre-Filters and Post-Filters

11.2.1 Threaded Filters Replacement

11.2.2 Flanged Filters Replacement

11.6 Desiccant Changeout Procedure

Step-by-step process for changing the desiccant material.

Desiccant Fill Chart

Chart detailing desiccant types, quantities, and models.

Troubleshooting Guide

12.0 Troubleshooting Common Issues

Common problems, causes, and corrective actions for dryer issues.

Wiring and Flow Diagrams

14.0 Wiring Diagram EH150-EH1500

14.0 Wiring Diagram EH1800-EH4000

14.0 Wiring Diagram EH5000-EH8000

15.0 Flow Diagram EH150-EH400

15.0 Flow Diagram EH500-EH3000

15.0 Flow Diagram EH4000-EH8000

Replacement Parts and Specifications

16.0 Replacement Parts EH150-EH400

List of replacement parts for EH150-EH400 dryers.

16.0 Replacement Parts EH500-EH800

List of replacement parts for EH500-EH800 dryers.

16.0 Replacement Parts EH1500-EH4000

List of replacement parts for EH1500-EH4000 dryers.

16.0 Replacement Parts EH5000-EH8000

List of replacement parts for EH5000-EH8000 dryers.

17.0 Engineering Specifications

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