Ingersoll-Rand HL120 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
Susan TateAug 15, 2025
What to do if Ingersoll-Rand Dryer has elevated dew point?
- K
  kristinnguyenAug 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.
C
Christy JensenAug 18, 2025
Why Ingersoll-Rand Dryer fails to shift?
- C
  Clifford ButlerAug 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.
M
Michele MackAug 21, 2025
What to do if Ingersoll-Rand Dryer has excessive pressure drop?
- L
  Linda SchaeferAug 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.
R
Robert WallAug 25, 2025
What to do if my Ingersoll-Rand Dryer fails to pressurize?
- K
  Kevin DixonAug 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.
S
Steve TuckerAug 28, 2025
What to do if Ingersoll-Rand Dryer depressurizes too rapidly?
- A
  Ashley RodgersAug 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
Amanda WardAug 31, 2025
What to do if the Blue Moisture Indicator (BMI) indicates high moisture level in Ingersoll-Rand Dryer?
- S
  Shannon HudsonSep 1, 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.
R
ruth11Sep 4, 2025
How to fix Ingersoll-Rand Dryer that fails to purge?
- D
  David RobertsSep 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.
D
Daniel AlvaradoSep 6, 2025
What causes excessive back pressure in regenerating tower of Ingersoll-Rand Dryer?
- A
  Amanda JonesSep 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).
M
Maria MorganSep 10, 2025
What causes excessively high pressure at the purge gauge on the right tower of Ingersoll-Rand Dryer?
- D
  Donald HoganSep 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 HL120 Specifications

General

Maximum Pressure	150 psig
Capacity	120 CFM
Inlet Pressure Range	150 PSIG
Inlet Temperature	120°F
Power Supply	60Hz

Summary

6.0 SAFETY AND OPERATION PRECAUTIONS

7.0 PRINCIPLES OF OPERATION

7.8 CONTROLS

Overview of the microprocessor controller, its modes, and alarm storage capabilities.

8.0 ALARMS AND INDICATORS

8.2 FAILURE TO SHIFT ALARM (OPTIONAL)

Alarm indicating a failure in the dryer's switching valve operation.

8.3 ENERGY MANAGEMENT SYSTEM (EMS) - (OPTIONAL)

Explanation of the EMS feature for minimizing purge air loss during low conditions.

8.4 HIGH DEW POINT ALARM (INCLUDED WITH EMS)

Alarm for failure to meet designed pressure dew point, linked to EMS.

8.5 COMPRESSOR INTERLOCK

Feature to operate dryer purge only when compressor is loading or ON.

9.0 INSTALLATION AND INITIAL START-UP

9.4 FILTRATION

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

9.6 ELECTRICAL CONNECTION

Instructions for making electrical connections to the dryer according to wiring diagrams.

9.8 START-UP

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

9.9 SHUT-DOWN SEQUENCE

Procedure for safely shutting down the dryer and its controller.

10.0 TECHNICIAN MODE

10.1 ENTERING TECHNICIAN MODE

Instructions for qualified personnel to access and enter the technician mode.

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

How to adjust the dew point setting for specific dryer models.

10.3 ENERGY MANAGEMENT SYSTEM (EMS) (OPTIONAL)

Description and activation of the Energy Management System for energy savings.

10.4 RESTART MODE

Configuring the dryer to restart automatically or manually after power loss.

10.5 PURGE FLOW ADJUSTER

10.6 COMPRESSOR INTERLOCK

10.7 HIGH DEW POINT ALARM (INCLUDED WITH EMS OPTION)

11.0 MAINTENANCE AND SYSTEM CHECK

11.1 SCHEDULED MAINTENANCE

11.2 PRE-FILTERS AND POST-FILTERS

11.8 DESICCANT CHANGEOUT PROCEDURE

Step-by-step process for replacing the desiccant material in the dryer towers.

12.0 TROUBLESHOOTING

13.0 PURGE CHARTS

15.0 WIRING DIAGRAM

16.0 FLOW DIAGRAM

17.0 REPLACEMENT PARTS

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