Ingersoll-Rand EH 400 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:

J
josephbarrettAug 12, 2025
Why does my Ingersoll-Rand EH 400 Dryer have an elevated dew point?
- D
  Derrick JimenezAug 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).
W
William BrownAug 16, 2025
What to do if Ingersoll-Rand EH 400 fails to shift?
- K
  Katelyn StrongAug 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.
T
Travis DavisAug 20, 2025
Why is there excessive pressure drop in my Ingersoll-Rand Dryer?
- J
  John Williams Jr.Aug 20, 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.
M
Max FreemanAug 23, 2025
How to fix Heater High Temp. Alarm (Heater runs continuously) in Ingersoll-Rand EH 400?
- J
  Jonathan ChandlerAug 23, 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.
G
Gilbert TaylorAug 27, 2025
What to do if Ingersoll-Rand Dryer fails to pressurize?
- A
  Austin MurrayAug 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.
J
Jessica AndersonAug 31, 2025
What to do if Ingersoll-Rand EH 400 Dryer fails to depressurize?
- A
  aprilmcguireAug 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.
E
efitzpatrickSep 3, 2025
Why is there excessive back pressure in regenerating tower in my Ingersoll-Rand EH 400 Dryer?
- C
  Christina KramerSep 3, 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).
R
Rebecca GeorgeSep 7, 2025
What causes excessively high pressure at the purge gage in Ingersoll-Rand Dryer?
- J
  Jacob LoveSep 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 400 Specifications

General

Brand	Ingersoll-Rand
Model	EH 400
Category	Dryer
Language	English

Summary

SAFETY AND OPERATION PRECAUTIONS

SAFETY PRECAUTIONS

Essential safety rules for dryer operation and maintenance.

PRINCIPLES OF OPERATION

ALARMS AND INDICATORS

8.2 HEATER HIGH TEMPERATURE ALARM

8.3 HEATER FAILURE ALARM

8.4 FAILURE TO SHIFT ALARM

8.5 HIGH DEW POINT ALARM

8.7 HIGH OUTLET TEMPERATURE

8.8 ALARM LIST

TECHNICIAN MODE

9.1 ENTERING TECHNICIAN MODE

Procedure for qualified personnel to enter technician mode.

9.2 OPERATING MODE (BI-MODE)

Changing the dryer's operation mode (heated/heatless).

9.3 HEATER TEMPERATURE SETPOINT

Adjusting the regeneration temperature in heated purge mode.

9.4.2 SETPOINT ADJUSTMENT

9.5 PURGE TEMPERATURE

9.6 RESTART MODE

9.7 EXTENDED HEATING (OPTIONAL)

9.8 HIGH DEW POINT ALARM (OPTIONAL)

9.9 PROGRAM JOG

9.10 SHUTDOWN SEQUENCE

Procedure for proper dryer shutdown.

INSTALLATION AND INITIAL START-UP

10.1 EQUIPMENT APPLICATION GUIDELINES

Guidelines for dryer application and operating range.

10.2 LOCATING AND MOUNTING

Proper placement and mounting of the dryer unit.

10.3 PIPING

Guidelines for compressed air line connections and exhaust piping.

10.4 FILTRATION

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

10.5 DEW POINT TRANSMITTER INSTALLATION

10.6 ELECTRICAL CONNECTION

Requirements for proper electrical connections.

10.7 START-UP

Procedures for initial dryer start-up.

10.8 SHUT DOWN PROCEDURES

Procedures for properly shutting down the dryer.

MAINTENANCE AND SYSTEM CHECK

11.1 SCHEDULED MAINTENANCE

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

11.2 PRE-FILTERS AND POST-FILTERS

Maintenance and replacement of pre-filters and post-filters.

11.2.1 THREADED FILTERS

Step-by-step guide for replacing threaded filter elements.

11.2.2 FLANGED FILTERS

Step-by-step guide for replacing flanged filter elements.

11.3 MUFFLER CHANGEOUT PROCEDURE

11.4 NO-LOSS DRAIN VALVES

11.5 PILOT OPERATED ACTUATOR

11.6 DESICCANT CHANGEOUT PROCEDURE

Procedure for changing dryer desiccant.

TROUBLESHOOTING

TROUBLESHOOTING TABLE

Common problems, causes, and corrective actions.

WIRING DIAGRAM

EH150-EH1500 WIRING DIAGRAM

Electrical wiring schematic for EH150-EH1500 models.

EH1800-EH4000 WIRING DIAGRAM

Electrical wiring schematic for EH1800-EH4000 models.

EH5000-EH8000 WIRING DIAGRAM

Electrical wiring schematic for EH5000-EH8000 models.

FLOW DIAGRAM

EH150-EH400 FLOW DIAGRAM

Flow diagram for EH150-EH400 models.

EH500-EH3000 FLOW DIAGRAM

Flow diagram for EH500-EH3000 models.

EH4000-EH8000 FLOW DIAGRAM

Flow diagram for EH4000-EH8000 models.

REPLACEMENT PARTS

REPLACEMENT PARTS LIST EH150-EH400

REPLACEMENT PARTS LIST EH500-EH800

REPLACEMENT PARTS LIST EH1500-EH4000

REPLACEMENT PARTS LIST EH5000-EH8000

ENGINEERING SPECIFICATIONS

ENGINEERING SPECIFICATIONS TABLE

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