Ingersoll-Rand EH 300

Questions and Answers

A
Amy SalazarAug 13, 2025
Why does my Ingersoll-Rand EH 300 have an elevated dew point?
- A
  Amanda RobertsonAug 13, 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).
J
John EdwardsAug 17, 2025
What to do if Ingersoll-Rand EH 300 fails to shift?
- N
  Nina SmithAug 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.
H
Heidi DiazAug 21, 2025
Why is there excessive pressure drop in my Ingersoll-Rand EH 300?
- A
  Alex JohnsonAug 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.
W
Wendy RossAug 25, 2025
How to fix Heater High Temp. Alarm (Heater runs continuously) in Ingersoll-Rand EH 300 Dryer?
- W
  william73Aug 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.
B
Bryan ReynoldsAug 28, 2025
What to do if Ingersoll-Rand Dryer fails to pressurize?
- J
  Jade LeAug 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.
L
Lance KeySep 1, 2025
What to do if Ingersoll-Rand Dryer fails to depressurize?
- R
  reeddonnaSep 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
Justin WilkinsonSep 5, 2025
Why is there excessive back pressure in regenerating tower in my Ingersoll-Rand EH 300?
- S
  Summer GibsonSep 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).
T
Timothy MendezSep 8, 2025
What causes excessively high pressure at the purge gage in Ingersoll-Rand EH 300 Dryer?
- R
  Richard AguirreSep 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.

Summary

Introduction to Ingersoll Rand Desiccant Dryers

Ingersoll Rand Desiccant Dryer Warranty Information

Company warranty terms for the equipment.

Safety and Operation Precautions

General Warning Statements

Hazardous situations with potential for severe injury or death.

General Caution Statements

Hazardous situations with potential for minor or moderate injury.

General Notice Statements

Statements related to company policy or property protection.

Principles of Desiccant Dryer Operation

Introduction to Dryer Operation

Desiccant Dryer Operation Details

Microprocessor Control User Interface

Microprocessor Control Parameters and Timing

Microprocessor Control Display Parameters

Parameters displayed on the microprocessor control.

Dryer Alarms and Indicators

Heater High Temperature Alarm

Alarm for high heater temperature and interlock function.

Heater Failure Alarm

Alarm for heater failure during heating cycle.

Failure to Shift Alarm

Alarms related to dryer sequencing failures.

High Dew Point Alarm (with EMS)

Alarm for exceeding the desired pressure dew point.

Energy Management System (EMS) Optional

Additional Dryer Alarms and Lists

High Outlet Temperature Alarm (Optional)

Alarm for high dryer discharge air temperature.

Accessing the Alarm List

Accessing and reviewing the stored alarm list.

Technician Mode Configuration

Entering Technician Mode

Steps to enter technician mode.

Changing Operating Mode (Bi-Mode)

Changing between heated and heatless operation modes.

Heater Temperature Setpoint Adjustment

Adjusting the heater temperature setpoint.

Energy Management System Configuration

Setting the Heater Temperature

Procedure to set the heater temperature.

Energy Management System (EMS) Overview

Enabling;Disabling EMS

Extended Heating and Dew Point Alarms

Extended Heating (Optional) Feature

High Dew Point Alarm (Optional)

Description and activation of the high dew point alarm.

High Dew Point Alarm Activation

How the high dew point alarm works and is enabled.

Technician Mode: Program Jog and Shutdown

Adjusting High Dew Point Alarm Setpoint

Adjusting the setpoint for the high dew point alarm.

Dryer Shutdown Sequence Procedure

The sequence for properly shutting down the dryer.

Installation and Initial Start-Up Guidelines

Equipment Application Guidelines

Guidelines for dryer application and operating range.

Dryer Locating and Mounting

Compressed Air Piping Instructions

Filtration Requirements

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

Installation Details and Optional Features

Coalescing Pre-Filters

Role of coalescing pre-filters in protecting desiccant.

Electrical Connection and Start-Up Procedures

Electrical Connection Guidelines

Guidelines for making electrical connections.

Initial Dryer Start-Up

Procedures for initial dryer start-up.

Dryer Shut Down Procedures

Procedures for safely shutting down the dryer.

Important Installation and Shutdown Cautions

Caution: Shutdown During Heating Cycle

Warning against shutting down during the heating cycle.

Shutdown Sequence Steps

Steps to initiate and complete the shutdown sequence.

Maintenance and System Check Schedule

Scheduled Maintenance Functions

Daily, monthly, quarterly, semi-annual, and annual maintenance tasks.

Pre-Filter and Post-Filter Maintenance

Maintenance of pre-filters and post-filters.

Filter Servicing Procedures

Threaded Filter Servicing

Flanged Filter Servicing

Component Maintenance Procedures

Desiccant Changeout Procedure

Procedure for changing the desiccant material.

Desiccant Fill Chart

Desiccant Quantity Specifications

Chart detailing desiccant quantities for different models.

Troubleshooting Dryer Problems

Common Dryer Problems and Solutions

Common problems and corrective actions for the dryer.

Wiring Diagrams

Wiring Diagram EH150-EH1500

Wiring schematic for EH150-EH1500 models.

Wiring Diagram EH1800-EH4000

Wiring schematic for EH1800-EH4000 models.

Wiring Diagram EH5000-EH8000

Wiring schematic for EH5000-EH8000 models.

Flow Diagrams

Flow Diagram Legend

Key for symbols and abbreviations used in flow diagrams.

Flow Diagram EH150-EH400

Flow schematic for EH150-EH400 models.

Flow Diagram EH500-EH3000

Flow schematic for EH500-EH3000 models.

Flow Diagram EH4000-EH8000

Flow schematic for EH4000-EH8000 models.

Replacement Parts List

Desiccant, 2-5 mm Grade D

Desiccant, 4-8 mm Grade D

Desiccant, Molecular Sieve

Dryer Controller Type 4 with Desiccant Program

Part number for the dryer controller.

Heater

Part number for the dryer heater.

Transmitter, Dewpoint (EMS Option)

Engineering Specifications for Dryer Models

Model Specifications Overview

Specification breakdown by dryer model.

Flow -40 Dewpoint Specification

Specification for flow rate at -40°F dew point.

Heater (kW) Specification

Specification for heater power in kW.

MCA (Amps) Specification

Specification for maximum continuous amperage.

MOP (Amps) Specification

Specification for maximum operating amperage.

Purge SCFM Specification

Air In & Out Connection Specification

Shipping Weight Specification