Nordyne G5RC Furnace Manual

The Nordyne G5RC is a high-efficiency gas furnace designed for residential heating applications. This furnace features a multi-speed blower motor, electronic ignition system, durable heat exchanger, safety controls, and compatibility with standard thermostat systems. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation Requirements 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Venting and Combustion Air 7. Operating Instructions 8. Maintenance Procedures 9. Safety Information 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Heat exchanger, blower assembly, gas valve, electronic ignition, pressure switches, limit controls, venting system.

Feature	Description
Heat Exchanger	Durable stainless steel construction for efficient heat transfer
Blower Motor	Multi-speed ECM motor for variable airflow control
Gas Valve	Electronic modulating valve for precise gas flow control
Ignition System	Hot surface igniter for reliable lighting
Pressure Switches	Safety devices to verify proper venting operation
Limit Controls	High-temperature safety cutoffs
Venting System	PVC pipe compatible for sidewall or roof venting
Filter Rack	Standard 1-inch filter accommodation
Control Board	Integrated furnace controller with diagnostic LEDs
Thermostat Connection	Standard 24VAC thermostat terminals

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

Location: Install in dry, clean area with adequate clearance for service access.
Gas Connection: Use approved gas piping materials; pressure test for leaks.
Electrical: 120VAC power supply with proper grounding; dedicated circuit recommended.
Venting: Follow manufacturer specifications for vent pipe sizing and routing.
Combustion Air: Ensure adequate fresh air supply per local codes.

WARNING! Gas appliances can produce carbon monoxide. Proper installation and venting are critical for safety.

First-Time Setup

Initial startup must be performed by qualified technician.

Verify all connections: Gas, electrical, venting, and air ducts.
Check gas pressure: Adjust manifold pressure to specifications.
Test safety controls: Verify limit switches and pressure switches function properly.
Program thermostat: Set heating schedule and temperature preferences.
Commission system: Run through complete heating cycle and verify operation.

CAUTION! Never attempt to adjust gas pressure or bypass safety controls.

Specifications

Model Series: G5RC
Input Capacity: 40,000 - 120,000 BTU/H (varies by model)
Efficiency: 80% AFUE minimum
Gas Type: Natural Gas (LP conversion kit available)
Electrical: 120VAC, 60Hz, 5-10 Amps
Blower Motor: Multi-speed ECM
Venting: Category IV, PVC pipe approved
Dimensions: Varies by model (check specific model label)
Weight: 80-150 lbs depending on model
Warranty: Limited lifetime heat exchanger, 5 years parts

Controls and Settings

Access control board via front panel removal. Diagnostic LEDs indicate system status.

Thermostat Settings: HEAT/COOL/OFF, FAN AUTO/ON, temperature setpoints.

Control Board: Power switch, diagnostic LED codes, dip switch settings for blower speeds. Gas Valve: Manifold pressure adjustment (qualified technician only). Blower Speeds: Adjustable for heating and continuous fan operation. Limit Controls: Factory set safety temperature limits.

Venting and Combustion Air

Category IV venting system required. PVC pipe materials approved.

Vent Pipe Sizing: Follow manufacturer specifications for pipe diameter.
Vent Termination: Maintain proper clearances from windows, doors, and air intakes.
Combustion Air: Provide adequate fresh air supply per installation requirements.
Vent Slope: Ensure proper slope for condensate drainage.

Tip: Regular inspection of vent system is essential for safe operation.

Operating Instructions

Normal operation controlled by thermostat.

Set thermostat to HEAT mode and desired temperature.
Furnace will initiate startup sequence: inducer motor, pressure switch verification, igniter warm-up, gas valve opening.
Once flame is established, blower will start after predetermined delay.
When thermostat is satisfied, gas valve closes and blower continues for post-purge cycle.
For continuous fan operation, set thermostat fan switch to ON position.

WARNING! If you smell gas, immediately turn off gas supply and call qualified technician.

Maintenance Procedures

Annual maintenance by qualified technician recommended.

Filter Replacement: Replace air filter every 1-3 months depending on usage.
Heat Exchanger Inspection: Check for cracks or corrosion annually.
Burner Cleaning: Clean burners and inspect flame pattern.
Vent System: Inspect for obstructions or damage.
Blower Assembly: Clean blower wheel and housing.
Electrical: Check all connections and component operation.

CAUTION! Always disconnect power before performing any maintenance.

Safety Information

Carbon monoxide detectors required in home with gas appliances. Keep combustible materials away from furnace. Never block air vents or returns.

Regulatory Information

ANSI Z21.47/CSA 2.3: Certified to national standards for gas-fired central furnaces. UL listed. For support, contact Nordyne technical support at 1-800-422-4328 or visit www.nordyne.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, safety lockout	Check power switch, thermostat settings, reset if locked out.
No heat	Gas supply, igniter, limit switch	Verify gas valve on, check igniter operation, reset limit switch.
Short cycling	Dirty filter, airflow restriction	Replace air filter, check for blocked vents or returns.
Blower won't run	Motor, capacitor, control board	Check motor operation, test capacitor, verify control signal.
Unusual noises	Blower, inducer, heat exchanger	Inspect blower wheel, inducer motor, check for loose components.

Reset: Power cycle furnace to clear temporary lockouts.

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