Dexter Laundry DN20X2 User Manual

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8533-108-001 10/22

Dexter Laundry DN20X2 Specifications

General

Brand	Dexter Laundry
Model	DN20X2
Category	Dryer
Language	English

Summary

Equipment Safety Warnings

Safety Symbol Definitions

Explains the meaning of danger, warning, caution, and notice symbols used in the manual.

Specific Hazard Symbols and Cautions

Details specific hazard symbols like electrical, sharp edges, and environmental precautions.

Specific Usage Prohibitions

Details specific actions prohibited during dryer operation for safety.

Mandatory Safety Actions

Outlines mandatory safety procedures and precautions for operating the equipment.

Section 1: Specifications

Express Stack Dryer Specifications

Detailed technical specifications for the Express Stack Dryer model.

Electrical Requirements

Specifies the electrical needs, circuit breaker, and wire size for different models.

Installation Recommendations

Provides guidelines for clearances, make-up air, and exhaust for proper installation.

Section 2: Installation & Operation

Dryer Installation Code Conformity

Outlines compliance with local and national codes for dryer installation.

Installation Clearances

Specifies required clearances around the dryer for safe operation and servicing.

Make-Up Air Requirements

Details the necessity and amount of make-up air for dryer operation.

Electrical Requirements

Lists the electrical power and connection requirements for the dryer unit.

Gas Requirements

Outlines gas supply connection, piping, and pressure requirements for gas models.

Burner Set-Up

Instructions for setting gas pressure for main burners during operation.

Exhaust Installation

Guidelines for proper dryer exhaust ducting to prevent fire hazards and ensure efficiency.

Dryer Ignition Procedure

Step-by-step guide for the solid-state ignition system's first-time start-up.

Main Burner Adjustment

Procedure for adjusting the primary air shutter for optimal air-gas ratio.

Dryer Shutdown

Instructions on how to render the dryer inoperative safely.

Touch Pad Controller Interface Description

Explains the function of touch pads, LEDs, and the 4-digit display on the controller.

Operating Instructions

Step-by-step guide on how to use the programmed dry cycles for operation.

Temporary Dryer Controller Programming

Procedure to temporarily modify stored dry cycle settings for one cycle.

Permanent Dryer Controller Programming

Method to permanently change stored dry cycle settings in the dryer controller.

Transient Voltage Surge Suppressors

Recommendation and information on installing surge protectors for equipment longevity.

Section 3: Wiring Schematics

60Hz Wiring Schematic Dryer Idle

Wiring schematic for a 60Hz dryer when no coins are added.

Coins Added - Motor Starting and Running

Explanation of motor operation when coins are added and the start button is pressed.

Heat Circuit Description

Details the operation of the heat circuit including safety devices and relays.

Manual Reset Safety Shutoff Thermostat

Description and function of the manual reset over-temperature safety thermostat.

Cool Down Period

Explains the cool down phase of the dry cycle and its duration.

End of Cycle Indicators

Describes what happens when the dry cycle concludes and the display.

Dual Voltage Stack Dryer Conversion

Instructions for converting a dryer from 120V to 208-240V.

Electrical Schematic for Service

Provides the complete electrical diagram for service and troubleshooting purposes.

Section 4: Service Procedures

Clothes Door Removal and Latch Adjustment

Procedures for removing the clothes door and adjusting the latch mechanism.

Door Switch Removal and Installation

Steps for removing and installing the door switch assembly.

Installation of Clothes Door Window and Gasket

Guide for installing the window and gasket onto the clothes door.

High Limit Thermostat Locations and Functions

Details the location and function of high limit thermostats in the burner housing.

Manual Reset Over Temperature Thermostats

Second hi-limit thermostat location and function for safety.

Pressure Regulator Adjustment

Procedure for adjusting the pressure regulator with a manometer.

Heat Sensor Function

Explains how the heat sensor thermistor works based on temperature and resistance.

Control and Switch Replacement

Procedures for removing electronic controls and replacing membrane switches.

Temperature Sensor Testing and Removal

Methods for testing and removing the temperature sensor for diagnostics.

Front Panel Removal Procedures

Step-by-step instructions for removing upper and lower front panels.

Belt Replacement and Pulley Installation

Guidance on replacing drive belts and installing tumbler pulleys.

Intermediate Pulley and Tension Arm Servicing

Procedures for removing and adjusting the intermediate pulley and tension arm.

Motor Blower Assembly Servicing

Steps for removing and installing the motor and blower assembly.

Air Flow Switch Function and Adjustment

Explains the air flow switch's role in the ignition safety circuit and its adjustment.

Ignition System Components and Function

Details ignition transformer, electronic module, and ignition sequence.

Ignition System Checkout and Electrode Removal

Procedures for checking ignition system performance and removing spark electrodes.

Gas Valve and Burner Servicing

Steps for removing gas valve, manifold, orifices, and main burners.

Cylinder and Housing Component Removal

Procedures for removing the cylinder, bearing housing, and accessing components.

Section 5: Troubleshooting

Electronic Control Diagnostic Lights

Explains the function of diagnostic lights on the electronic control board.

Electronic Control Test Cycle

Procedure to run a 5-minute test cycle for evaluating the machine.

Trouble Shooting Fault Codes

Lists specific fault codes (F1-F5) and their probable causes and suggested remedies.

Troubleshooting Tips

Provides common symptoms, probable causes, and suggested remedies for dryer issues.

Section 6: Parts Data

Kits, Assemblies, & Common Parts List

A list of common parts, kits, and assemblies with their part numbers.

Dryer Cabinet Group Parts

Detailed parts list and diagram for the dryer cabinet group components.

Rear View Component Identification

Identifies various components located in the rear view of the dryer.

Dryer Back Panels and Guards

Lists parts for dryer back panels, guards, and related labels.

Air Flow Switch Assembly Parts

Details the parts that comprise the air flow switch assembly.

Bearing Housing Group Parts

Lists parts related to the bearing housing assembly.

Tumbler Group Parts

Details parts associated with the tumbler assembly, including belts and pulleys.

Dryer Burner Housing Group Parts

Lists parts for the dryer's burner housing assembly, including burners and gas components.

Control Assembly Group Parts

Details parts for the control assembly, including wiring harnesses and transformers.

Door Switch Group Parts

Lists parts for the door switch and related mounting components.

Control Group Parts

Details parts for the main control board, display board, and connectors.

Section 7: Electric Heated

DN20X2-84 Part List

Comprehensive parts list for the DN20X2-84 electric heated model.

Electrical Schematic for Service

Provides the electrical schematic for electric heated models for service.

DN20X2-85 Part List

Comprehensive parts list for the DN20X2-85 electric heated model.

DN20X2-87 Part List

Comprehensive parts list for the DN20X2-87 electric heated model.

Section 8: 50 Hz

Section 9: 50 Hz Electric Heated

Section 10: Maintenance

Preventative Maintenance Schedule

Outlines daily, monthly, quarterly, semi-annually, and annually scheduled maintenance tasks.