Goodman Furnace Installation Manual PDF

The Goodman Furnace Installation Manual provides comprehensive guidance for proper installation, setup, and operation of Goodman gas and electric furnace systems. This manual covers safety precautions, technical specifications, installation procedures, wiring diagrams, startup instructions, maintenance requirements, and troubleshooting guidelines for various Goodman furnace models. Below are key sections for safe and efficient furnace installation and operation.

1. Safety Precautions 2. Pre-Installation Requirements 3. Installation Procedures 4. Technical Specifications 5. Wiring and Electrical Connections 6. Venting and Combustion Air 7. Startup and Commissioning 8. Operating Instructions 9. Maintenance Schedule 10. Troubleshooting Guide 11. Warranty Information

Safety Precautions

Critical safety information for furnace installation and operation.

Hazard	Precaution
Gas leaks	Check all gas connections with soap solution; never use open flame
Electrical shock	Disconnect power before servicing; follow local electrical codes
Carbon monoxide	Ensure proper venting; install CO detectors in living areas
Fire hazard	Maintain clearance from combustibles; keep area clean
Burn risk	Allow furnace to cool before servicing; wear protective gear

Pre-Installation Requirements

Essential preparations before furnace installation.

Verify local codes: Check municipal building and mechanical codes.
Site inspection: Ensure adequate space, clearance, and accessibility.
Utility connections: Confirm gas line, electrical supply, and thermostat wiring.
Permit acquisition: Obtain required installation permits from local authorities.
Equipment verification: Match furnace model to heating load calculation.

WARNING! Installation by unqualified personnel may result in property damage, personal injury, or death. Always hire licensed HVAC professionals.

Installation Procedures

Step-by-step furnace installation guide.

Position furnace: Place on level surface with proper clearance.
Connect ductwork: Seal all joints with approved duct sealant.
Install gas piping: Use black iron pipe with proper sizing.
Electrical connections: Follow wiring diagram; install disconnect switch.
Venting system: Install according to manufacturer specifications.
Condensate drainage: Route to approved drain with proper slope.
Thermostat wiring: Connect to appropriate terminals.

CAUTION! Never operate furnace without proper venting installed and verified.

Technical Specifications

Models Covered: GMVC96, GMSS96, GMS8, GCVC96 series
Input Capacity: 40,000 to 120,000 BTU/H
Efficiency: 80% to 96% AFUE
Electrical: 115V/60Hz, 15 Amp circuit
Gas Type: Natural gas or LP (with conversion kit)
Venting: Category IV (PVC) or Category I (metal)
Dimensions: Varies by model (check specific model data)
Weight: 90 to 150 pounds

Wiring and Electrical Connections

Proper electrical installation and wiring guidelines.

Main Power: 115V AC, 15 Amp dedicated circuit with disconnect switch within sight of unit.

Thermostat Wiring: Standard 5-wire connection (R, C, W, G, Y) for single-stage systems; additional wires for multi-stage or communicating systems.

Grounding: Proper equipment grounding required per NEC. Polarity: Maintain correct hot and neutral connections. Fusing: Install correct size fuses or circuit breakers.

Venting and Combustion Air

Venting system requirements and combustion air provisions.

Vent material: Use only approved PVC, CPVC, or AL29-4C for Category IV furnaces.
Vent sizing: Follow manufacturer tables for proper diameter and length.
Termination: Maintain proper clearance from windows, doors, and air intakes.
Combustion air: Provide adequate fresh air supply per local codes.
Slope: Ensure proper drainage slope for condensing furnaces.

Tip: Always perform combustion analysis after installation to verify proper operation.

Startup and Commissioning

Initial startup procedures and system verification.

Gas pressure check: Verify inlet and manifold pressures.
Leak test: Check all gas connections with bubble solution.
Electrical verification: Confirm proper voltage and polarity.
Vent verification: Check for proper draft and vent integrity.
Sequence test: Verify proper ignition and safety shutdown.
Temperature rise: Measure and adjust within specified range.
Combustion analysis: Verify CO levels and efficiency.
Customer orientation: Explain operation and maintenance requirements.

WARNING! Never bypass safety controls or operate furnace with safety devices disabled.

Operating Instructions

Proper furnace operation and user controls.

Thermostat Settings: Program for energy efficiency. Filter Maintenance: Replace every 1-3 months. System Switch: ON for heating, OFF for service. Fan Switch: AUTO for automatic operation, ON for continuous circulation.

Maintenance Schedule

Recommended maintenance intervals and procedures.

Monthly: Check air filter; clean if dirty. Annually: Professional inspection and cleaning. Every 5 years: Heat exchanger inspection.

CAUTION! Always turn off power and gas supply before performing any maintenance.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
No heat	Thermostat, power, gas valve	Check thermostat setting; verify power; check gas valve position
Furnace short cycles	Dirty filter, restricted vent	Replace filter; check vent system for obstructions
Blower runs continuously	Thermostat fan setting	Set thermostat fan to AUTO mode
Unusual noises	Loose components, airflow	Tighten access panels; check blower wheel; verify duct sizing
Lockout condition	Ignition failure, safety switch	Reset power; check flame sensor; verify pressure switches

Reset Procedure: Turn thermostat to OFF, wait 5 minutes, turn to HEAT.

Service: Contact qualified HVAC technician for complex issues.

Warranty Information

Goodman furnace warranty coverage and registration requirements.

Limited Lifetime Warranty: Heat exchanger. 10-Year Parts Limited Warranty: Covered components. 1-Year Labor Allowance: For registered products. To activate full warranty: Register within 60 days of installation at www.goodmanmfg.com or call 1-877-466-8626. Keep original receipt and installation date for warranty claims.