Gardner Denver GDD4F User Manual (English)

Lorraine LittleAug 18, 2025

Why is the pressure in my Gardner Denver Dehumidifier line low?

J
Jerry RamirezAug 18, 2025
Low pressure in your Gardner Denver Dehumidifier line can be caused by several factors. Check for ice formation in the evaporator and inspect/replace the probe if needed. Ensure the compressed air inlet/outlet is connected properly to prevent clogs. Also, check if air flows continuously through the condensate drainage, which may indicate a jammed drainage solenoid valve that needs cleaning or replacement. You may also want to check the condition of any filter.

Water Removal	Not available
Airflow Capacity	235 CFM
Power Supply	115V, 60Hz
Air Flow	235 CFM
Weight	106 lbs

Water Removal

Not available

Airflow Capacity

235 CFM

Power Supply

115V, 60Hz

Air Flow

235 CFM

Weight

106 lbs

Summary

General Information

Functional Description

Explains how Gardner Denver refrigerated air dryers remove moisture from compressed air using a two-stage cooling process.

Safe Machine Operation

Outlines safety precautions and compliance with European directives for installation, use, and maintenance of the dryer.

Installation Procedures

Acceptance and Handling

Instructions for inspecting the unit upon delivery, noting any rough handling, and proper handling procedures.

Storage and Installation Location

Guidelines for storing the dryer when not in use and selecting a suitable installation site with environmental conditions.

Unpacking the Dryer

Procedures for unpacking the dryer, including safety recommendations for handling packaging materials.

Installation Steps

Details on connecting the dryer to compressed air lines, electrical connections, condensate drainage, and power supply requirements.

Start Up Procedures

Control Panel Overview

Overview of the dryer's electronic control system, keys, and digital display for operation and adjustments.

Control Panel Key Functions

Explains the function of each key on the control panel (ON/OFF, TEST, SET, DOWN, UP) for operation and programming.

Condensate Discharge Programming

Details on how to enter and modify condensate discharge parameters (C8, C9) via the control panel.

Display Indications and Errors

Explains the meaning of various messages (HtA, Ht2, PF1, ESA, ES2, ASt) displayed on the controller and their causes/actions.

Remote Signaling Alarm

Describes how to activate the dry contact for a remote alarm signal and its electrical features.

Pre-Start Up Checks

Instructions to ensure all operating parameters are correct and to check performances during initial working hours.

Initial Start Up Procedure

Step-by-step procedure for starting the dryer after installation or prolonged inactivity, including checks and waiting periods.

Maintenance, Troubleshooting, and Decommissioning

Routine Maintenance Schedule

Outlines recommended maintenance tasks based on operating hours (weekly, monthly, yearly, every 24 months) and safety precautions.

Troubleshooting Guide

Provides a table of common troubles, display indicators, possible causes, and remedies for dryer malfunctions.

Decommissioning Process

Procedures for safely shutting down and decommissioning the dryer, including disposal considerations.

Gardner Denver GDD4F User Manual

Table of Contents

Questions and Answers:

Gardner Denver GDD4F Specifications