Ingersoll-Rand EH 1200 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
Christopher ThomasAug 14, 2025
Why does my Ingersoll-Rand Dryer have an elevated dew point?
- C
  Christy BrownAug 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).
C
Catherine PerezAug 17, 2025
What to do if Ingersoll-Rand EH 1200 Dryer fails to shift?
- M
  Mariah MullenAug 18, 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.
R
Rachael TurnerAug 21, 2025
Why is there excessive pressure drop in my Ingersoll-Rand Dryer?
- J
  Jenny TorresAug 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.
K
Karen SmithAug 25, 2025
How to fix Heater High Temp. Alarm (Heater runs continuously) in Ingersoll-Rand Dryer?
- V
  vevansAug 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
denisehigginsAug 28, 2025
What to do if Ingersoll-Rand EH 1200 fails to pressurize?
- T
  Taylor GibbsAug 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.
D
Derek BrowningSep 1, 2025
What to do if Ingersoll-Rand EH 1200 Dryer fails to depressurize?
- I
  ivanyorkSep 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.
R
Rachel LopezSep 5, 2025
Why is there excessive back pressure in regenerating tower in my Ingersoll-Rand Dryer?
- R
  rwalshSep 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).
C
carlgonzalezSep 9, 2025
What causes excessively high pressure at the purge gage in Ingersoll-Rand EH 1200 Dryer?
- R
  Renee JohnsonSep 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 1200 Specifications

General

Brand	Ingersoll-Rand
Model	EH 1200
Category	Dryer
Language	English

Summary

Product Warranty Information

Safety and Operation Precautions

General Safety Rules and Precautions

Essential safety rules for dryer operation and maintenance.

Principles of Air Dryer Operation

Principles of Air Dryer Operation (Continued)

Dryer Control Interface Details

Dryer Timing Sequences

Dryer Alarms and Indicators

Heater High Temperature Alarm

Alarm for high heater temperature and safety interlock.

Heater Failure Alarm

Alarm indicating heater failure during the heating cycle.

Failure to Shift Alarm

Alarms for failure to shift between tower cycles.

High Dew Point Alarm (with EMS)

Alarm for exceeding the preset dew point.

Dryer Alarms and Indicators (Continued)

High Outlet Temperature Alarm (Optional)

Alarm for high outlet air temperature.

Alarm List Access and Viewing

How to access and review the stored alarm history.

Alarm List Details

Viewing Specific Alarm Conditions

Technician Mode Operations

Entering Technician Mode

Warning and procedure for entering technician mode.

Changing Operating Mode (Bi-Mode)

Heater Temperature Setpoint Adjustment

Adjusting the regeneration heater temperature.

Technician Mode Operations (Continued)

Heater Temperature Setpoint Procedure

Procedure for setting the heater temperature.

Enabling/Disabling EMS Procedure

High Dew Point Alarm Setpoint Adjustment

Energy Management System (EMS) Overview

Adjusting EMS Setpoint

Extended Heating (Optional Feature)

Enabling/Disabling EMS

Purge Temperature Feature

High Dew Point Alarm Description

Shutdown Sequence Procedure

Steps for a proper dryer shutdown sequence.

High Dew Point Alarm Activation

Installation and Initial Start-Up

Equipment Application Guidelines

Locating and Mounting the Dryer

Filtration Requirements

Installation and Initial Start-Up (Continued)

Filtration Importance

Dryer Start-Up Safety Precautions

Safety precautions for starting up the dryer.

Electrical Connection Procedures

Guidance on electrical connections and grounding.

Dryer Shut Down Procedures

Correct procedures for shutting down the dryer.

Initial Dryer Start-Up Procedure

Procedures for initial dryer start-up.

Maintenance and System Check Schedule

Scheduled Maintenance Tasks

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

Pre-Filter and Post-Filter Maintenance

Maintenance and System Check (Continued)

Threaded Filter Maintenance

Threaded Filter Replacement

Flanged Filter Replacement

Desiccant Changeout Procedure

Procedure for changing the desiccant material.

Troubleshooting Common Dryer Issues

Troubleshooting Common Dryer Issues

Table detailing common problems and corrective actions.

Wiring Diagrams

Flow Diagrams

Replacement Parts Listing

Engineering Specifications

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