Ingersoll-Rand HRD25 User Manual

Bulletin 341 Revision F 7/97
HRD SERIES
HEATLESS COMPRESSED AIR DRYERS
OPERATOR’S
INSTRUCTION MANUAL
Before installation or starting the dryer for the
first time, study this manual carefully to obtain
a clear knowledge of the unit and of the duties
to be performed while operating and maintain-
ing the unit.
RETAIN THIS MANUAL WITH UNIT.
This technical manual contains IMPORTANT
SAFETY DATA and should be kept with the
dryer at all times.

Ingersoll-Rand HRD25 Specifications

General

Brand	Ingersoll-Rand
Model	HRD25
Category	Dehumidifier
Language	English

Summary

Safety Precautions for HRD Series Dryers

General Safety Rules and Warnings

Essential safety rules to prevent dryer damage, warranty voidance, or injury.

Hazard Identification System

Installation Guide for HRD Series Dryers

Receiving and Inspection Procedures

Desiccant Types and Requirements

Desiccant Installation and Handling

Step-by-step guide for safely adding desiccant, including DANGER and CAUTION notices.

Electrical Connection Requirements

Operating the HRD Series Dryer

How the Heatless Dryer Works

Dryer Start-Up Procedure

Step-by-step instructions for safely starting the HRD Series dryer.

Dew Point Control and Adjustment

How purge air controls dew point and how to adjust it to -40°F.

Dew Point Verification Process

Maintenance and Shutdown Procedures

Dryer Shutdown and Venting

Steps to safely shut down the dryer and vent internal air pressure.

Electrical Maintenance Safety

Critical safety precautions for performing electrical maintenance on the dryer.

Desiccant Dusting and Muffler Maintenance

Periodic Maintenance Schedule

Daily, weekly, and yearly checks to ensure optimal dryer performance and safety.

Desiccant Replacement Guide

Safety for Desiccant Replacement

Critical safety warnings (explosion, shock) before replacing desiccant.

Desiccant Replacement Steps

Detailed procedure for removing old desiccant and installing new desiccant.

Adjusting the High-Humidity Alarm

Setting the High-Humidity Alarm

Field Service Guide and Troubleshooting

Troubleshooting Common Dryer Problems