Sullair SD-600 User Manual

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SD-220 / SD-600

DDS OPTION

3V OPTION

SD Heatless Desiccant

Compressed Air Dryers

REF: 02250130-734

SERIES SD

Table of Contents

Questions and Answers:

T
Tamara SmithAug 17, 2025
What to do if the dryer does not switch towers in Sullair SD-600?
- B
  Bryan SanchezAug 17, 2025
  If your Sullair Dehumidifier's dryer isn't switching towers, several factors could be at play. The inlet valve combination might not be opening or switching; in this case, check the electrical functioning of the solenoids and replace either the solenoid or the complete valve combination. Another reason could be that the PLC isn't functioning; check the PLC and the fuse in the control cabinet. The vessel might not be pressurized; check whether the blow-off valves are dirty and replace them if necessary, and check the electrical functioning of the solenoids, replacing either the solenoid or the complete valve combination. The regeneration orifice might be obstructed; clean or replace it.
S
Sara FarrellAug 25, 2025
How to fix high back pressure during regeneration phase in Sullair SD-600?
- L
  Lindsay CooleyAug 26, 2025
  High back pressure during the regeneration phase in your Sullair Dehumidifier can stem from a few issues. The silencer might be blocked; clean or replace it. The inlet/exhaust valve cylinders could be defective; lubricate the cylinder, replace seals if necessary, or replace the cylinder. Also, the check valves might not be sealing; repair the check valve.

Sullair SD-600 Specifications

General

Brand	Sullair
Model	SD-600
Category	Dehumidifier
Language	English

Summary

Section 1 Introduction

1.2 Safety Instructions

Essential safety tips for setup, operation, and servicing.

1.2.2 Safety Tips for Maintenance

Safety guidelines for maintenance, inspection, and assembly tasks.

Section 2 Installation

2.1 Set-up and Installation

Detailed steps for positioning and connecting the dryer.

Section 3 Start Up and Operation

3.1 Start Up and Shut Down

Procedures and precautions for starting up and shutting down the dryer.

3.2 Description of the Operation

3.2.3 Operating Sequence (DDS Option)

3.2.4 Alarms

Description of common and optional alarms.

3.2.5 Electrical Control

Section 4 Maintenance

4.1 Replacement of the Desiccant

Step-by-step guide for replacing the desiccant material.

4.5 Filters

4.5.5 Changing of Filter Elements

Section 5 Dryer Flow Capacity and Purge Adjustment

5.1 Dryer Flow Capacity

Section 7 Trouble Shooting & Faults

7.1 The Dew Point is Too High

Identifies possible causes and solutions for high dew point.

7.2 The Adsorption Dryer Does Not Switch Over

Lists possible causes and solutions for dryer switching failure.

7.3 Back Pressure During Regeneration

7.5 Shut-Down for Fault or Maintenance

Procedures for safely shutting down the dryer for faults or maintenance.

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