Nordyne Electric Furnace Parts Manual

The Nordyne Electric Furnace is a high-efficiency heating system designed for residential and light commercial applications. This manual provides comprehensive information on parts identification, replacement procedures, technical specifications, and maintenance guidelines for Nordyne electric furnace models. Below are key sections covering parts diagrams, installation guidelines, troubleshooting, and technical specifications.

1. Parts Overview 2. Installation Guidelines 3. Technical Specifications 4. Controls and Components 5. Wiring Diagrams 6. Replacement Procedures 7. Maintenance Schedule 9. Safety Information 10. Regulatory Compliance 11. Troubleshooting Guide

Parts Overview

Key components: Heating elements, blower assembly, control board, sequencers, limit switches, transformer, and safety devices.

Part Name	Description
Heating Elements	Electric resistance coils that generate heat
Blower Assembly	Circulates air through the duct system
Control Board	Main system controller and safety monitor
Sequencers	Controls staging of heating elements
Limit Switches	Safety devices that prevent overheating
Transformer	Steps down voltage for control circuit
Thermal Fuses	Over-temperature protection devices
Blower Motor	Drives the blower fan assembly
Capacitors	Provides starting torque for motors
Relays	Electrical switches for component control

Installation Guidelines

Proper installation ensures optimal performance and safety. Follow all local electrical codes and manufacturer specifications.

Electrical Connections: Verify proper voltage and amperage requirements before wiring.
Ductwork: Ensure proper sizing and sealing of supply and return ducts.
Clearances: Maintain minimum clearances as specified in installation manual.
Grounding: Properly ground all electrical components per NEC requirements.

WARNING! Installation must be performed by qualified HVAC technician. Electrical shock hazard exists.

Technical Specifications

Voltage Requirements: 208/240V AC, 60Hz
Heating Capacity: 5kW to 25kW depending on model
Airflow: 400-2000 CFM based on blower configuration
Maximum Temperature Rise: 70°F (21°C)
Electrical Connections: Line voltage and low voltage terminals
Blower Motor Type: PSC or ECM depending on model
Control Voltage: 24V AC
Operating Ambient: 32°F to 120°F (0°C to 49°C)

Controls and Components

Access control board via front service panel. Main components include sequencer relays, limit controls, and transformer.

Control Board: Monitors safety circuits, controls blower operation, manages heating stages. Sequencers: Time-delay relays that stage heating elements to prevent power surge. Limit Switches: Automatic reset high-limit protection. Blower Control: Adjustable delay-on-break and delay-on-make settings.

Wiring Diagrams

Refer to specific model wiring diagram for proper connections. Diagrams located on inside of service panel door.

Disconnect all power before accessing electrical components.
Verify wire sizing matches electrical load requirements.
Use proper strain relief and conduit where required.
Test all safety circuits after installation.

Tip: Always reference the specific model number when ordering replacement parts.

Replacement Procedures

Authorized replacement parts ensure system reliability and safety.

Heating Elements: Disconnect power, remove access panel, disconnect wires, remove mounting hardware.
Blower Motor: Disconnect power, remove blower assembly, disconnect electrical connections, remove set screws.
Control Board: Label all wires before disconnecting, remove mounting screws, install new board.
Limit Switches: Test continuity before replacement, disconnect wires, remove mounting clip.
Sequencers: Note wire positions, remove from mounting rail, install identical replacement.

WARNING! Always disconnect power before servicing. Use only Nordyne approved replacement parts.

Maintenance Schedule

Regular maintenance ensures optimal performance and extends equipment life.

Monthly: Check air filters, inspect for unusual noises
Seasonal: Clean blower assembly, inspect heating elements
Annual: Professional inspection of electrical components, safety devices
As Needed: Clean ductwork, check electrical connections

Safety Information

High voltage electrical hazard exists. Follow all lockout/tagout procedures.

CAUTION! Electrical shock hazard. Disconnect all power sources before servicing. High temperatures present during operation.

Regulatory Compliance

UL listed and complies with NEC requirements. Meets ANSI Z21 standards for safety. Certified for residential installation. All components RoHS compliant. For technical support, contact Nordyne at 1-800-422-4328 or visit www.nordyne.com.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
No heat	Power supply, sequencer, limit switch	Check circuit breakers, test sequencer operation, verify limit switch continuity.
Blower not running	Motor, capacitor, control board	Test motor windings, check capacitor, verify control board output.
Insufficient heat	Heating elements, airflow	Test element continuity, check for restricted airflow, verify voltage.
Frequent cycling	Dirty filter, limit switch	Replace air filter, test high limit operation, check duct restrictions.
Blower runs continuously	Control board, thermostat	Check thermostat settings, test control board fan relay.

Reset: Turn power off for 30 seconds to reset control board.

Service: 1-800-422-4328; www.nordyne.com