Ingersoll-Rand HL250 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:

V
Virginia ThorntonAug 14, 2025
What to do if Ingersoll-Rand Dryer has elevated dew point?
- R
  richharoldAug 15, 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.
A
Adam LiAug 18, 2025
Why Ingersoll-Rand Dryer fails to shift?
- D
  David FigueroaAug 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.
T
torreslindaAug 21, 2025
What to do if Ingersoll-Rand Dryer has excessive pressure drop?
- K
  Katie AndersonAug 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.
J
Jillian RodriguezAug 25, 2025
What to do if my Ingersoll-Rand Dryer fails to pressurize?
- J
  Jeremy StrongAug 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
Jamie ClarkAug 28, 2025
What to do if Ingersoll-Rand Dryer depressurizes too rapidly?
- R
  robinsondawnAug 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.
A
Amy JohnsonAug 31, 2025
What to do if the Blue Moisture Indicator (BMI) indicates high moisture level in Ingersoll-Rand Dryer?
- A
  Amy JohnsonAug 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.
A
Ashley HoodSep 4, 2025
How to fix Ingersoll-Rand Dryer that fails to purge?
- B
  barkerchristopherSep 4, 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.
A
anthonypriceSep 7, 2025
What causes excessive back pressure in regenerating tower of Ingersoll-Rand Dryer?
- R
  Roy GutierrezSep 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).
J
jeffreymendozaSep 12, 2025
What causes excessively high pressure at the purge gauge on the right tower of Ingersoll-Rand Dryer?
- M
  Mr. Kevin RodriguezSep 12, 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 HL250 Specifications

General

Brand	Ingersoll-Rand
Model	HL250
Category	Dryer
Language	English

Summary

Receiving, Handling, and Safety Precautions

6.0 Safety and Operation Precautions

Essential safety rules for operation and maintenance.

General Safety Precautions

Lists 8 key safety points for operation and maintenance.

Principles of Operation

7.0 Principles of Operation

Explains how desiccant dryers work.

7.2 Drying Cycle

Process of air drying and moisture adsorption.

7.3 Regeneration Cycle

Process of removing moisture from desiccant.

7.7.1 Timing Cycle for -40°F Dew Point Dryers

Timing details for -40°F models.

7.7.2 Timing Cycle for -100°F Dew Point Dryers

7.8 Controls

7.8.2 Microprocessor Control Display Parameters

7.8.3 Alarms and Their Functions

Details on dryer alarms and their meanings.

Alarm List and Screen Details

7.8.4 Restart Modes and Operating Displays

Alarms and Indicators

8.0 Alarms and Indicators

Alarms and indicators for monitoring dryer status.

8.2 Failure to Shift Alarm (Optional)

8.3 Energy Management System (EMS) - (Optional)

EMS for purge air optimization.

8.4 High Dew Point Alarm (Included with EMS)

Alarm for high outlet dew point.

8.5 Compressor Interlock

Installation and Initial Start-Up

9.0 Installation and Initial Start-Up

Guide for setting up and starting the dryer.

9.4 Filtration

9.6 Electrical Connection

9.8 Start-Up

Initial dryer startup procedure.

9.9 Shut-Down Sequence

Safe dryer shutdown process.

Technician Mode Settings

10.0 Technician Mode

Advanced settings for technicians.

10.1 Entering Technician Mode

10.2 Dew Point Adjuster (-40 °F Dryers Only)

10.3 Energy Management System (Optional)

EMS feature overview.

10.3.1 Description and Activation

10.3.2 Setpoint Adjustment

10.5 Purge Flow Adjuster

10.6 Compressor Interlock

10.7 High Dew Point Alarm (Included with EMS Option)

High dew point alarm configuration.

10.7.1 Description and Activation

10.7.2 Setpoint Adjustment

Maintenance and System Checks

11.0 Maintenance and System Check

Routine maintenance and checks.

11.1 Scheduled Maintenance

Daily, semi-annual, annual maintenance.

11.2 Pre-filters and Post-filters

11.8 Desiccant Changeout Procedure

Desiccant replacement process.

Troubleshooting

Wiring Diagram

Flow Diagram

Replacement Parts List

Engineering Specifications

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