Ingersoll-Rand EH Series User Manual (English)

Questions and Answers:

H
Heather AllenAug 12, 2025
Why does my Ingersoll-Rand Dryer have an elevated dew point?
- K
  karenwileyAug 12, 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).
T
Thomas CantuAug 16, 2025
What to do if Ingersoll-Rand Dryer fails to shift?
- L
  Lori SpencerAug 16, 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.
A
Amy JonesAug 19, 2025
Why is there excessive pressure drop in my Ingersoll-Rand EH Dryer?
- A
  Alexandra MillerAug 19, 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.
E
edwardpalmerAug 23, 2025
How to fix Heater High Temp. Alarm (Heater runs continuously) in Ingersoll-Rand Dryer?
- W
  whiteannaAug 25, 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.
R
Richard PetersAug 27, 2025
What to do if Ingersoll-Rand Dryer fails to pressurize?
- D
  Derrick LeeAug 27, 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.
T
Terry KingAug 31, 2025
What to do if Ingersoll-Rand EH Dryer fails to depressurize?
- M
  Michael BushAug 31, 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.
A
austin90Sep 4, 2025
Why is there excessive back pressure in regenerating tower in my Ingersoll-Rand EH?
- T
  Troy BeardSep 4, 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).
J
Jamie PetersSep 7, 2025
What causes excessively high pressure at the purge gage in Ingersoll-Rand Dryer?
- B
  Blake HansenSep 7, 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 Series Specifications

General

Brand	Ingersoll-Rand
Model	EH Series
Category	Dryer
Language	English

Summary

Introduction to EH Series Desiccant Dryers

Warranty Information

Heatless Dryer Nomenclature

Receiving and Inspection

Dryer Inspection Upon Arrival

Instructions for visually checking the dryer for damage after delivery.

Safe Unpacking and Handling

Guidelines for safely unpacking and moving the dryer unit.

Safety and Operation Precautions

General Safety Guidelines

Essential safety rules for operating and maintaining the dryer.

Warning Symbol Definitions

Definitions of Warning, Caution, and Notice symbols used in the manual.

Principles of Operation

Dryer Operation Overview

Explains the basic function of desiccant dryers and regeneration.

Drying Cycle Process

Details the compressed air drying process within one of the towers.

Regeneration Cycle Process

Describes the process of regenerating the desiccant material.

Setting Regeneration Air Flow

How to properly adjust the purge air flow for optimal dryer performance.

Heated Purge Regeneration

Explains the regeneration process using a heater and its control.

Principles of Operation (Continued)

Heatless Pressure Swing Regeneration

Details the regeneration process without a heater, using purge air.

Tower Repressurization Process

Explains how a tower is repressurized after the regeneration stage.

Repressurization Methods

Differentiates between heated and heatless repressurization methods.

Dryer Valves Description

Describes the function and operation of the dryer's pneumatic valves.

Microprocessor Control Interface

Overview of the control panel, display, and keypad functions.

Principles of Operation (Continued)

Control Panel Buttons Explained

Explains the function of each button on the microprocessor control panel.

Status Panel Indicator Lights

Describes the meaning of the LED indicators on the dryer status panel.

Principles of Operation (Continued)

Microprocessor Display Parameters

Details the system parameters viewable on the microprocessor display.

Dryer Timing Sequence Control

Explains how the microprocessor controller manages dryer timing cycles.

Heated vs. Heatless Timing Cycles

Describes the specific timing sequences for heated and heatless modes.

Dryer Restart Modes

Explains the different restart configurations after power loss.

Principles of Operation (Continued)

Manual (Zero) Restart Mode

Details the manual restart procedure for the dryer.

Automatic (Last) Restart Mode

Details the automatic restart functionality of the dryer.

Accessing Operating Times Data

Instructions on how to view dryer operating and purge hours.

Alarms and Indicators

Moisture Indicator Functionality

Explains the moisture indicator's role in monitoring dryer performance.

Heater High Temperature Alarm

Details the alarm for high heater temperature and its safety interlock.

Heater Failure Alarm

Explains the alarm triggered by a failure in the heater's heat generation.

Failure to Shift Alarms

Describes alarms indicating issues with the tower switching sequence.

High Dew Point Alarm (EMS)

Alarm for when the dryer fails to meet the specified pressure dew point.

Energy Management System (EMS)

Overview of the optional EMS feature for energy savings and operation.

Alarms and Indicators (Continued)

High Outlet Temperature Alarm

Alarm for high discharge air temperature that doesn't stop the process.

Accessing the Alarm List

Instructions for viewing the stored list of recent alarm conditions.

Technician Mode Operations

Entering Technician Mode

Steps for qualified personnel to access advanced settings.

Changing Dryer Operating Mode

How to switch between Heated Purge and Heatless operating modes.

Technician Mode Operations (Continued)

Adjusting Heater Temperature Setpoint

How to modify the heater temperature in heated purge mode.

Energy Management System (EMS)

Overview of the optional EMS feature for energy savings and operation.

Enabling/Disabling EMS

Steps to activate or deactivate the Energy Management System.

Technician Mode Operations (Continued)

EMS Setpoint Adjustment

How to adjust the EMS setpoint for pressure dew point control.

Purge Temperature Control

How to access and activate the purge temperature monitoring feature.

Configuring Restart Modes

How to set the dryer for Manual or Auto Restart after power loss.

Technician Mode Operations (Continued)

Extended Heating Mode

How to enable extended heating for new desiccant operation.

High Dew Point Alarm Configuration

Configuration and activation of the high dew point alarm.

Technician Mode Operations (Continued)

Program Jog Functionality

How to accelerate dryer cycles for troubleshooting purposes.

Shutdown Sequence Procedure

Details the steps for properly shutting down the dryer.

Installation and Initial Start-Up

Equipment Application Guidelines

Guidance on selecting and applying the dryer based on operating conditions.

Locating and Mounting the Dryer

Instructions for choosing an installation site and securing the dryer.

Compressed Air Piping Requirements

Guidelines for connecting the compressed air supply and exhaust lines.

Filtration Requirements

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

Installation and Initial Start-Up (Continued)

Dew Point Transmitter Installation

Steps for installing the optional dew point transmitter.

Installation and Initial Start-Up (Continued)

Electrical Connection Procedures

Instructions for safely connecting the dryer to the electrical supply.

Initial Dryer Start-Up Steps

Procedures for the first-time operation of the dryer.

Dryer Shutdown Procedures

Steps for properly shutting down the dryer to maintain performance.

Installation and Initial Start-Up (Continued)

Shutdown Safety Precautions

Warnings and notices related to the dryer shutdown process.

Maintenance and System Check

Scheduled Maintenance Tasks

Details daily, monthly, quarterly, semi-annual, and annual maintenance activities.

Pre-Filter and Post-Filter Servicing

Information on changing filter elements to protect the desiccant bed.

Maintenance and System Check (Continued)

Servicing Threaded Filters

Step-by-step guide for replacing elements in threaded filters.

Servicing Flanged Filters

Step-by-step guide for replacing elements in flanged filters.

Maintenance and System Check (Continued)

Muffler Replacement Procedure

Procedure for replacing the purge exhaust mufflers.

No-Loss Drain Valve Maintenance

How to clean and maintain the no-loss drain valves.

Pilot Operated Actuator Troubleshooting

Steps to diagnose issues if the actuator fails to rotate.

Desiccant Changeout Procedure

Detailed steps for replacing the desiccant material in the towers.

Troubleshooting Common Issues

General Arrangement Drawings (EH150)

General Arrangement Drawings (EH200)

General Arrangement Drawings (EH250-EH300)

General Arrangement Drawings (EH400-EH500)

General Arrangement Drawings (EH600-EH800)

General Arrangement Drawings (EH1000-EH1200)

General Arrangement Drawings (EH1500)

General Arrangement Drawings (EH1800)

General Arrangement Drawings (EH2100)

General Arrangement Drawings (EH3000)

General Arrangement Drawings (EH4000)

General Arrangement Drawings (EH5000)

General Arrangement Drawings (EH6000)

General Arrangement Drawings (EH8000)

Wiring Diagram (EH150-EH1500)

Wiring Diagram (EH1800-EH4000)

Wiring Diagram (EH5000-EH8000)

Flow Diagram (EH150-EH400)

Flow Diagram (EH500-EH3000)

Flow Diagram (EH4000-EH8000)

Replacement Parts List (EH150-EH400)

Replacement Parts List (EH500-EH3000)

Replacement Parts List (EH1500-EH4000)

Replacement Parts List (EH5000-EH8000)

Engineering Specifications Overview

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Ingersoll-Rand EH Series User Manual

Table of Contents

Questions and Answers:

Ingersoll-Rand EH Series Specifications

Summary

Introduction to EH Series Desiccant Dryers

Warranty Information

Heatless Dryer Nomenclature

Receiving and Inspection

Dryer Inspection Upon Arrival

Safe Unpacking and Handling

Safety and Operation Precautions

General Safety Guidelines

Warning Symbol Definitions

Principles of Operation

Dryer Operation Overview

Drying Cycle Process

Regeneration Cycle Process

Setting Regeneration Air Flow

Heated Purge Regeneration

Principles of Operation (Continued)

Heatless Pressure Swing Regeneration

Tower Repressurization Process

Repressurization Methods

Dryer Valves Description

Microprocessor Control Interface

Principles of Operation (Continued)

Control Panel Buttons Explained

Status Panel Indicator Lights

Principles of Operation (Continued)

Microprocessor Display Parameters

Dryer Timing Sequence Control

Heated vs. Heatless Timing Cycles

Dryer Restart Modes

Principles of Operation (Continued)

Manual (Zero) Restart Mode

Automatic (Last) Restart Mode

Accessing Operating Times Data

Alarms and Indicators

Moisture Indicator Functionality

Heater High Temperature Alarm

Heater Failure Alarm

Failure to Shift Alarms

High Dew Point Alarm (EMS)

Energy Management System (EMS)

Alarms and Indicators (Continued)

High Outlet Temperature Alarm

Accessing the Alarm List

Technician Mode Operations

Entering Technician Mode

Changing Dryer Operating Mode

Technician Mode Operations (Continued)

Adjusting Heater Temperature Setpoint

Energy Management System (EMS)

Enabling/Disabling EMS

Technician Mode Operations (Continued)

EMS Setpoint Adjustment

Purge Temperature Control

Configuring Restart Modes

Technician Mode Operations (Continued)

Extended Heating Mode

High Dew Point Alarm Configuration

Technician Mode Operations (Continued)

Program Jog Functionality

Shutdown Sequence Procedure

Installation and Initial Start-Up

Equipment Application Guidelines

Locating and Mounting the Dryer

Compressed Air Piping Requirements

Filtration Requirements

Installation and Initial Start-Up (Continued)

Dew Point Transmitter Installation

Installation and Initial Start-Up (Continued)

Electrical Connection Procedures

Initial Dryer Start-Up Steps

Dryer Shutdown Procedures

Installation and Initial Start-Up (Continued)

Shutdown Safety Precautions

Maintenance and System Check

Scheduled Maintenance Tasks