Ingersoll-Rand HL400 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:

S
Sierra ThorntonAug 14, 2025
What to do if Ingersoll-Rand Dryer has elevated dew point?
- J
  Jason RobinsonAug 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.
C
craigcarolAug 17, 2025
Why Ingersoll-Rand Dryer fails to shift?
- M
  Michael RamosAug 17, 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.
G
Garrett McdanielAug 21, 2025
What to do if Ingersoll-Rand Dryer has excessive pressure drop?
- T
  theresa69Aug 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.
B
Brenda NormanAug 25, 2025
What to do if my Ingersoll-Rand Dryer fails to pressurize?
- J
  Jeremy CollinsAug 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.
C
Cindy HintonAug 27, 2025
What to do if Ingersoll-Rand Dryer depressurizes too rapidly?
- S
  scottbutlerAug 27, 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.
M
mbrownAug 31, 2025
What to do if the Blue Moisture Indicator (BMI) indicates high moisture level in Ingersoll-Rand Dryer?
- S
  sarah63Aug 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.
T
Terry BennettSep 3, 2025
How to fix Ingersoll-Rand Dryer that fails to purge?
- S
  Savannah WoodsSep 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.
M
Mr. Bill BarberSep 6, 2025
What causes excessive back pressure in regenerating tower of Ingersoll-Rand Dryer?
- A
  Angela JosephSep 6, 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).
G
Gabriel HodgesSep 10, 2025
What causes excessively high pressure at the purge gauge on the right tower of Ingersoll-Rand Dryer?
- T
  Tony SanchezSep 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 HL400 Specifications

General

Brand	Ingersoll-Rand
Model	HL400
Category	Dryer
Language	English

Summary

5.0 RECEIVING AND INSPECTION

6.0 SAFETY AND OPERATION PRECAUTIONS

7.0 PRINCIPLES OF OPERATION

7.2 DRYING CYCLE

How compressed air is dried by adsorption in one tower while the other regenerates.

7.3 REGENERATION CYCLE

Process of removing moisture from desiccant using a portion of dry air.

7.4 SETTING THE REGENERATION AIR FLOW

7.7 TIMING SEQUENCE

7.8 CONTROLS

7.8.3 ALARMS AND THEIR FUNCTIONS

Explains the types of alarms and their triggers.

8.0 ALARMS AND INDICATORS

8.2 FAILURE TO SHIFT ALARM (OPTIONAL)

9.0 INSTALLATION AND INITIAL START-UP

9.1 APPLICATION AND CHECK ANALYSIS

9.4 FILTRATION

Importance of pre-filters and post-filters for dryer protection and warranty.

9.6 ELECTRICAL CONNECTION

9.8 START-UP

Step-by-step guide for initial system pressurization and operation.

9.9 SHUT-DOWN SEQUENCE

Proper procedure for safely shutting down the dryer.

10.0 TECHNICIAN MODE

10.2 DEW POINT ADJUSTER (-40 °F DRYERS ONLY)

How to select and adjust pressure dew points for optimal drying.

10.3 ENERGY MANAGEMENT SYSTEM (EMS) (OPTIONAL)

Description and activation of the EMS feature for energy savings.

10.3.1 DESCRIPTION AND ACTIVATION

Explains the EMS feature's purpose and how to enable it.

10.3.2 SETPOINT ADJUSTMENT

10.5 PURGE FLOW ADJUSTER

10.6 COMPRESSOR INTERLOCK

10.7 HIGH DEW POINT ALARM (INCLUDED WITH EMS OPTION)

Alarm function to indicate failure to meet designed pressure dew point.

10.7.1 DESCRIPTION AND ACTIVATION

Explains the purpose and activation of the high dew point alarm.

10.7.2 SETPOINT ADJUSTMENT

11.0 MAINTENANCE AND SYSTEM CHECK

11.1 SCHEDULED MAINTENANCE

Details daily, semi-annual, and annual maintenance tasks.

11.2 PRE-FILTERS AND POST-FILTERS

Guidance on changing filter cartridges for optimal performance.

11.8 DESICCANT CHANGEOUT PROCEDURE

12.0 TROUBLESHOOTING

15.0 WIRING DIAGRAM

16.0 FLOW DIAGRAM

17.0 REPLACEMENT PARTS

18.0 ENGINEERING SPECIFICATIONS

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