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SPX Hankison DHW 20 User Manual

SPX Hankison DHW 20
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DHW Series
Pressure Swing Desiccant Compressed Air Dryer
Models 7 through 50 scfm
FORM NO.: 3215738 REVISION: 07/2014 READ AND UNDERSTAND THIS MANUAL PRIOR TO OPERATING OR SERVICING THIS PRODUCT.
INSTRUCTION MANUAL
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SPX Hankison DHW 20 Specifications

General IconGeneral
TypeRefrigerated Air Dryer
ModelDHW 20
BrandSPX Hankison
Frequency60Hz
Phase1
Max Inlet Temperature120 °F (49 °C)
RefrigerantR-134a
Flow Rate20 CFM
Nominal Capacity CFM20 CFM
Pressure Dew Point38°F
Operating Pressure150 psig
Inlet Temperature120°F

Summary

General Information and Safety

Unpacking Instructions

Check for visible or concealed loss or damage upon delivery and filing claims.

General Safety Precautions

Covers pressurized devices, electrical safety, and breathing air considerations.

DHW Series Dryer Description

Function and Operation Principle

Explains dual tower regenerative desiccant drying and air regeneration.

Dryer Operation Sequence

Details the automatic cycle of drying and regeneration between towers.

Air By-Pass Assembly

Describes the optional by-pass feature and its operation for different models.

Installation Guide

Dimensions, Connections, and Weight

Provides physical specifications, connection types, and weight for various models.

Electrical Specifications and Hook-up

Details power requirements and electrical connection diagram.

Dryer Location and System Integration

Guidance on optimal dryer placement and upstream component integration.

Prefilter, Afterfilter, Piping, and Mounting

Instructions for installing filters, piping, wall-mounting, and indicators.

Moisture Indicator and Initial Charge

Steps for installing the moisture indicator and initial desiccant preparation.

Operation and Performance

Start-up and Initial Checks

Steps for initial pressurization, leak checking, and powering on the dryer.

Flow Rates and Correction Factors

Details flow rates and correction factors for various pressures and temperatures.

Operating Conditions and Check Points

Covers maximum/minimum conditions and regular operational checks.

Shutdown and Depressurization

Instructions for safely shutting down and depressurizing the unit.

Maintenance Procedures

Desiccant Replacement

Steps for replacing desiccant, including ensuring dryness and handling.

Filter and Auto Drain Maintenance

Guidance on replacing filter elements and auto drain mechanisms.

Repair Parts Identification

Part numbers for various components and maintenance kits.

Warranty Information

Manufacturer's Warranty Terms

Details warranty period, coverage, exclusions, and limitations of liability.

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