Goodman Furnace Installation Manual GMV95

The Goodman GMV95 is a high-efficiency gas furnace with variable-speed ECM blower motor, multi-speed operation, and AFUE rating up to 95%. This condensing furnace features two-stage gas valve, hot surface ignition, induced draft combustion, and compatibility with various thermostat systems. Below are key sections for safety, installation procedures, electrical connections, startup, operation, and troubleshooting.

Features at a Glance

Key components: Two-stage gas valve, variable-speed ECM blower, hot surface ignitor, induced draft motor, pressure switches, flame sensor, and control board.

Safety Precautions

Follow all safety guidelines during installation and service.

1. Turn off electrical power and gas supply before installation.
2. Wear appropriate PPE: safety glasses, gloves, and protective clothing.
3. Ensure proper ventilation and combustion air supply.
4. Check for gas leaks using soap solution after connections.
5. Verify proper venting to prevent carbon monoxide hazards.

WARNING! Failure to follow safety procedures may result in fire, explosion, property damage, personal injury, or death. Gas furnaces must be installed by qualified technicians only.

Installation Requirements

Proper installation ensures optimal performance and safety.

1. Location: Install in dry, clean area with adequate service clearance (minimum 24 inches front, 6 inches sides).
2. Combustion Air: Provide adequate fresh air per local codes (typically 1 sq. in. per 1000 BTU input).
3. Venting: Use approved PVC pipe for condensing furnaces; maintain proper slope for condensate drainage.
4. Gas Supply: Verify gas type (natural gas); ensure adequate gas pressure (3.5" WC for natural gas).
5. Electrical: 120V AC, 60Hz dedicated circuit with proper grounding.

CAUTION! Never install in areas where flammable materials are stored or where temperature may fall below freezing.

Specifications

• Model Series: GMV95
• Input BTU/H: 40,000 to 120,000 (varies by model)
• AFUE: Up to 95%
• Gas Type: Natural Gas
• Electrical: 120V AC, 60Hz, 15 Amp circuit
• Blower Motor: Variable-speed ECM
• Stages: Two-stage heating
• Venting: PVC, CPVC, or ABS (2" or 3" diameter)
• Filter: 16x25x1 or 20x25x1
• Dimensions: Varies by model (typical: 21"W x 21"D x 45"H)
• Shipping Weight: 120-180 lbs depending on model

Venting System Installation

Proper venting is critical for safe operation of condensing furnace.

1. Use only approved PVC, CPVC, or ABS pipe for venting.
2. Maintain minimum clearance to combustible materials (1 inch typically).
3. Install condensate drain line with proper trap and slope.
4. Vent termination must be at least 12 inches above ground level.
5. Ensure intake and exhaust pipes are properly separated per code requirements.

Tip: Always pressure test vent system before final connection to furnace.

Gas Supply Connection

Gas line installation must comply with local codes and regulations.

1. Shut off gas supply at main valve before beginning work.
2. Use black iron pipe or approved flexible connector.
3. Install sediment trap/drip leg before gas valve connection.
4. Use pipe thread compound or Teflon tape rated for gas service.
5. Check all connections for leaks using soap solution after pressurizing.

WARNING! Never use matches or open flame to check for gas leaks. Use approved leak detection methods only.

Electrical Wiring

Proper electrical connections ensure safe and reliable operation.

1. Disconnect power at circuit breaker before wiring.
2. Connect 120V power supply to furnace junction box.
3. Install properly sized fuse or circuit breaker (typically 15 Amp).
4. Connect thermostat wires to control board (R, W, Y, G, C terminals).
5. Ensure proper grounding of furnace chassis.

CAUTION! Electrical work must be performed by qualified electrician in accordance with NEC and local codes.

Startup and Commissioning

Follow startup sequence to verify proper operation.

1. Verify all connections are complete and secure.
2. Restore electrical power and gas supply.
3. Set thermostat to call for heat.
4. Observe ignition sequence: inducer motor starts, pressure switch closes, ignitor glows, gas valve opens.
5. Verify flame establishment and proper burner operation.
6. Check temperature rise across heat exchanger (typically 35-65°F).
7. Verify proper venting and combustion.

Note: Use combustion analyzer to verify CO levels and efficiency.

Operation and Maintenance

Regular maintenance ensures long-term reliability and efficiency.

1. Replace air filter monthly during heating season.
2. Annual professional inspection recommended.
3. Clean flame sensor and burners annually.
4. Check condensate drain system for blockages.
5. Verify proper airflow and temperature rise.
6. Lubricate inducer motor if required (most are permanently lubricated).

Tip: Keep area around furnace clean and free of combustible materials.

Regulatory Information

This furnace complies with ANSI Z21.47/CSA 2.3 standards. Installation must comply with National Fuel Gas Code (NFPA 54), National Electrical Code (NFPA 70), and all local building codes. CSA certified for U.S. and Canada. For technical support, contact Goodman Manufacturing at 1-877-466-8626 or visit www.goodmanmfg.com.

Troubleshooting

Reset: Power cycle furnace to clear temporary fault codes.

Service: 1-877-466-8626; www.goodmanmfg.com