Ingersoll-Rand EH 500 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:

L
lryanAug 13, 2025
Why does my Ingersoll-Rand Dryer have an elevated dew point?
- M
  Megan VelezAug 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).
P
Patrick RobinsonAug 17, 2025
What to do if Ingersoll-Rand Dryer fails to shift?
- J
  Jeff ThomasAug 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.
C
Carrie SampsonAug 21, 2025
Why is there excessive pressure drop in my Ingersoll-Rand Dryer?
- B
  Brian JuarezAug 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.
P
Phillip WrightAug 25, 2025
How to fix Heater High Temp. Alarm (Heater runs continuously) in Ingersoll-Rand EH 500?
- S
  Stephanie MannAug 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.
D
Daniel StarkAug 28, 2025
What to do if Ingersoll-Rand Dryer fails to pressurize?
- B
  Brenda BirdAug 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.
C
Carol ConwaySep 1, 2025
What to do if Ingersoll-Rand EH 500 Dryer fails to depressurize?
- L
  Lindsay BrownSep 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.
G
Gary RojasSep 5, 2025
Why is there excessive back pressure in regenerating tower in my Ingersoll-Rand EH 500 Dryer?
- S
  schaeferbrianSep 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).
J
James HaleSep 9, 2025
What causes excessively high pressure at the purge gage in Ingersoll-Rand EH 500 Dryer?
- Y
  yorkjoshuaSep 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 500 Specifications

General

Brand	Ingersoll-Rand
Model	EH 500
Category	Dryer
Language	English

Summary

Safety Precautions

6.0 Safety and Operation Precautions

Essential safety rules for operating and maintaining the desiccant dryer.

Principles of Operation - Part 1

7.2 Drying Cycle

Process of wet air passing through desiccant for moisture removal.

7.3 Regeneration Cycle

Process of removing adsorbed moisture from desiccant.

Principles of Operation - Part 2

7.4 Tower Repressurization

Procedure to repressurize a tower after regeneration before switching.

7.6 Controls

Overview of the dryer's control system and user interface.

Control Interfaces and Parameters

7.6.1 Microprocessor Control User Interface

Details the keypad functions and display of the microprocessor controller.

7.6.2 Status Panel User Interface

7.6.3 Microprocessor Control Display Parameters

Operation Timing and Modes

7.7 Timing Sequence

Describes the standard timing cycles for heated and heatless dryer modes.

7.8 Restart Modes

Alarms and Indicators - Part 1

8.2 Heater High Temperature Alarm

Details the alarm condition when the heater temperature exceeds limits.

8.3 Heater Failure Alarm (Standard)

Indicates an alarm if the heater fails to generate heat during the cycle.

8.4 Failure to Shift Alarm (Standard)

Detects issues with tower repressurization or depressurization.

8.5 High Dew Point Alarm (Included with EMS)

Alerts when the dryer fails to supply air at the designed pressure dew point.

8.6 Energy Management System (EMS) (Optional)

Alarms and Indicators - Part 2

8.7 High Outlet Temperature (Optional)

8.8 Alarm List

Accessing and reviewing the 20 most recent alarm conditions.

Technician Mode Operations - Part 1

9.1 Entering Technician Mode

Instructions for qualified personnel to enter the protected technician mode.

9.2 Operating Mode (Bi-Mode)

Changing the dryer operation between heated purge and heatless modes.

9.3 Heater Temperature Setpoint (Heated Purge Mode Only)

Technician Mode Operations - Part 2

9.4 Energy Management System (Optional)

9.4.1 Enabling / Disabling Energy Management System

Technician Mode Operations - Part 3

9.4.2 Setpoint Adjustment

9.5 Purge Temperature (Optional, Heated Purge Mode)

9.6 Restart Mode

Technician Mode Operations - Part 4

9.8 High Dew Point Alarm (Optional)

9.8.1 Description and Activation

Technician Mode Operations - Part 5

9.8.2 Setpoint Adjustment

9.10 Shutdown Sequence

Installation and Start-Up - Part 1

10.1 Equipment Application Guidelines

10.2 Locating and Mounting

10.3 Piping

10.4 Filtration

Installation and Start-Up - Part 2

10.5 Dew Point Transmitter Installation (Optional)

Installation and Start-Up - Part 3

10.6 Electrical Connection

10.7 Start-Up

Procedure for initial dryer start-up, including pressurization and leak testing.

10.8 Shut Down Procedures

Correct procedures to shut down the dryer to avoid damage.

Maintenance and System Checks - Part 1

11.1 Scheduled Maintenance

Details various maintenance schedules including daily, monthly, and annual tasks.

11.2 Pre-filters and Post-filters

Maintenance and System Checks - Part 2

11.2.1 Threaded Filters

11.2.2 Flanged Filters

Maintenance and System Checks - Part 3

11.6 Desiccant Changeout Procedure

Troubleshooting Guide

12.0 Troubleshooting

Identifies common problems and provides corrective actions for dryer issues.

Replacement Parts

16.0 Replacement Parts

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