Ingersoll-Rand HL90 User Manual

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HL SERIES DESICCANT DRYER

MODELS 90-5000

OPERATORS MANUAL

C.C.N. : 80442833 en

DATE : APRIL 2010

REV. : D

Ensure that the operator reads and understands the decals

and consults the manuals before maintenance or operation.

Ensure that the Operation and Maintenance manual is not

removed permanently from the machine.

Ensure that maintenance personnel are adequately trained,

competent and have read the Maintenance Manuals.



PRINT LANGUAGE

ENGLISH

FRENCH

PORTUGUESES

SPANISH

Table of Contents

Questions and Answers:

D
david13Aug 14, 2025
What to do if Ingersoll-Rand Dryer has elevated dew point?
- G
  Gary WilliamsAug 14, 2025
  If your Ingersoll-Rand Dryer has an elevated dew point, several factors could be the cause. First, check the purge flow settings to ensure they are sufficient. Also, inspect the purge piping for any obstructions and clean the purge piping and muffler. Verify that the inlet air pressure meets the design conditions and check the system for leaks. Ensure the flow rate is within the design specifications and address any increased demand. If the inlet temperature exceeds the design condition (120°F), inspect and service the aftercooler. Also, check the air/moisture separator and pre-filter for entrained water and replace the dryer desiccant if needed. Finally, if the desiccant is contaminated by oil, install a suitable pre-filter and replace the dryer desiccant.
J
John HendersonAug 17, 2025
Why Ingersoll-Rand Dryer fails to shift?
- T
  Tara HamptonAug 18, 2025
  If your Ingersoll-Rand Dryer fails to shift, it could be due to several reasons. First, check the power input to ensure there is power. Next, inspect the no-loss drain valve for any defects. Also, check the pilot air line and ensure that the control air line filter is clean. Finally, examine the pilot-operated diaphragm valve seals and replace them if necessary.
C
Christina HolmesAug 21, 2025
What to do if Ingersoll-Rand Dryer has excessive pressure drop?
- R
  Rita DanielsAug 21, 2025
  If your Ingersoll-Rand Dryer experiences an excessive pressure drop, it could be due to excessive flowrate, so check the flow rate and cause for increased air demand. It could also be caused by the inlet pressure being below the design condition, in which case you should check the pressure source.
K
Kathy RiddleAug 25, 2025
What to do if my Ingersoll-Rand Dryer fails to pressurize?
- L
  limelanieAug 25, 2025
  If your Ingersoll-Rand Dryer fails to pressurize, check that the repressurization circuit is sending a control signal to the purge valve. Also, inspect the purge valve and its no-loss drain valve.
J
Jennifer PowellAug 27, 2025
What to do if Ingersoll-Rand Dryer depressurizes too rapidly?
- C
  Carrie MyersAug 28, 2025
  If your Ingersoll-Rand Dryer depressurizes too rapidly, it may be because the purge valve does not close, causing the dryer to repressurize through the inlet valve. Check the purge valve and its no-loss drain valve.
D
David HarrisAug 31, 2025
What to do if the Blue Moisture Indicator (BMI) indicates high moisture level in Ingersoll-Rand Dryer?
- M
  Melissa BrownAug 31, 2025
  If the Blue Moisture Indicator (BMI) in your Ingersoll-Rand Dryer indicates a high moisture level, it could be due to an elevated dew point. Refer to the corrective actions for 'Elevated Dew Point'. Also, if the BMI is wet, it may take a week or more of continuous use for it to switch back to its blue (dry) state, depending on the degree of saturation of the desiccant.
B
Brittney PattersonSep 3, 2025
How to fix Ingersoll-Rand Dryer that fails to purge?
- F
  Francisco SolisSep 3, 2025
  If your Ingersoll-Rand Dryer fails to purge, it may be because the purge valve does not open or is stuck in the closed position. Check the purge valve and its no-loss drain valve, and repair or replace them if necessary. Also, check that the repressurization circuit is sending a control signal.
P
Peter LarsenSep 6, 2025
What causes excessive back pressure in regenerating tower of Ingersoll-Rand Dryer?
- J
  John CarlsonSep 7, 2025
  Excessive back pressure in the regenerating tower of your Ingersoll-Rand Dryer (above 5 psig) could be due to a dirty purge muffler that does not pass air; replace it. It may also be caused by the purge muffler passing too much air because air is leaking across the valve; check the inlet valve and outlet check valves, and verify the inlet valve is closed to the purging tower (0 psig tower).
C
Chelsea DavisSep 9, 2025
What causes excessively high pressure at the purge gauge on the right tower of Ingersoll-Rand Dryer?
- W
  William LinSep 10, 2025
  If there is excessively high pressure at the purge gauge on the right tower of your Ingersoll-Rand Dryer, it could be due to improper calibration. Reset it when the right tower is online.

Ingersoll-Rand HL90 Specifications

General

Brand	Ingersoll-Rand
Model	HL90
Category	Dryer
Language	English

Summary

Safety and Operation Precautions

Principles of Desiccant Dryer Operation

Drying Cycle Process

Details the process of compressed air passing through the online tower for moisture removal.

Regeneration Cycle Process

Explains how the offline tower is depressurized and dried using a portion of dry air.

Dryer Controls and Interface

Dryer Alarms and Indicators

Failure to Shift Alarm (Optional)

Energy Management System (EMS) - Optional

Details on EMS features, activation, and setpoint adjustment for energy savings.

High Dew Point Alarm (Included with EMS)

Alerts the operator if the dryer fails to meet the designed pressure dew point.

Installation and Initial Start-Up

Filtration Requirements

Initial Start-Up Guide

Step-by-step guide for the initial start-up process of the dryer.

Shut-Down Sequence

Proper procedure for safely shutting down the dryer and removing power.

Technician Mode Operations

Entering Technician Mode

Dew Point Adjuster Settings

How to select and adjust the desired pressure dew point for -40°F dryers.

Energy Management System (EMS) Features

Details on EMS features, activation, and setpoint adjustment for energy savings.

Maintenance and System Checks

Scheduled Maintenance Tasks

Routine maintenance tasks including daily, semi-annual, and annual checks.

Pre-filter and Post-filter Maintenance

Guidance on changing filter elements to maintain dryer efficiency and air quality.

Desiccant Changeout Procedure

Troubleshooting Dryer Malfunctions

Purge Charts for Air Flow

Wiring Diagram

Flow Diagram

Replacement Parts List

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