Installation Guide
Tools Needed:
- Multimeter
- Manifold gauge set
- Vacuum pump
- Torque wrench
- Leak detector
- Pipe cutter
- Flaring tool
Step-by-Step Installation
- Site Preparation: Select a level, stable location with proper clearance for service access and airflow.
- Furnace Placement: Position furnace on a solid, level surface, ensuring proper venting requirements are met.
- Condenser Unit Installation: Place outdoor condenser unit on a level pad with adequate clearance from walls and vegetation.
- Refrigerant Line Installation: Connect copper refrigerant lines between indoor and outdoor units using proper brazing techniques.
- Electrical Connections: Connect to properly sized circuit breakers according to local electrical codes and manufacturer specifications.
- Ductwork Connection: Connect supply and return ducts, ensuring proper sealing to prevent air leakage.
- Gas Line Connection: Connect gas supply line using approved piping materials and leak test all connections.
- System Startup: Perform complete system startup including refrigerant charging, gas pressure adjustment, and safety checks.
Specifications
| Model Series | GMVC96 / GSXC18 |
| System Type | Gas Furnace & Air Conditioner Combo |
| Furnace Efficiency | 96% AFUE |
| AC Efficiency | 18 SEER |
| Heating Capacity | 60,000 - 120,000 BTU/h |
| Cooling Capacity | 1.5 - 5 Tons (18,000 - 60,000 BTU/h) |
| Sound Level | Indoor: 65 dB / Outdoor: 72 dB |
| Control Type | Digital Thermostat with Programmable Settings |
| Power Requirements | 115V/230V, 60Hz, 15-30A |
| Refrigerant Type | R-410A |
| Gas Requirements | Natural Gas / LP (Conversion Kit Available) |
| Dimensions (Furnace) | 45" H x 21" W x 26" D |
| Dimensions (Condenser) | 35" H x 31" W x 31" D |
Warranty Information
- Limited Warranty: 10 years parts, 1 year labor
- Heat Exchanger Warranty: Lifetime limited warranty
- Compressor Warranty: 10 years limited warranty
- Registration Required: 90-day registration for full warranty
For warranty service, contact Goodman Manufacturing at 1-877-466-8626 or visit GoodmanMFG.com
Key Features
Variable Speed Technology
Advanced variable speed blower motor provides precise airflow control, improved comfort, and significant energy savings compared to single-speed systems.
Two-Stage Cooling
The two-stage compressor operates at low capacity most of the time for efficient operation, only switching to high capacity during extreme temperatures.
SilentComfort™ Technology
Specially designed cabinet and internal components reduce operational noise for quieter heating and cooling performance.
SmartFrame™ Coil Guard
Protective coil guard on outdoor unit prevents damage from lawn equipment and debris while maintaining optimal airflow.
ComfortNet™ Compatible
Advanced communication technology allows for system diagnostics, remote monitoring, and integration with smart home systems.
DuraGuard™ Plus Protection
Heavy-duty construction with corrosion-resistant materials protects against harsh weather conditions and extends system life.
System Components Explained
Heat Exchanger
Stainless steel primary and aluminized steel secondary heat exchangers for maximum efficiency and durability
Blower Assembly
Variable speed ECM motor with insulated cabinet for quiet, efficient airflow
Compressor
Two-stage scroll compressor with sound insulation for reliable, quiet cooling operation
Coil System
Enhanced surface area coils with corrosion-resistant coating for optimal heat transfer
Control Board
Microprocessor-based control with self-diagnostic capabilities and LED status indicators
Air Filtration
High-capacity filter system with options for upgraded filtration including HEPA and electronic air cleaners
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| System won't start | Power issue, thermostat setting, safety lockout | Check circuit breakers, verify thermostat settings, reset system |
| No heat/cool production | Gas valve closed, refrigerant leak, dirty filter | Check gas supply, inspect for leaks, replace air filter |
| Insufficient airflow | Dirty filter, blocked vents, blower issues | Replace filter, clear vents, check blower operation |
| Unusual noises | Loose components, duct issues, motor problems | Tighten components, inspect ductwork, check motor bearings |
| Frequent cycling | Oversized system, thermostat issues, airflow problems | Check system sizing, calibrate thermostat, verify airflow |
| High energy bills | Dirty coils, leaky ducts, improper refrigerant charge | Clean coils, seal ductwork, check refrigerant levels |
Error Codes
- E1: Ignition failure - Check gas supply and ignition system
- E2: Pressure switch error - Verify venting and switch operation
- E3: Limit switch lockout - Check airflow and filter
- E4: Flame loss during operation - Inspect flame sensor and gas valve
- E5: Blower error - Check motor and capacitor
- E6: Communication error - Check thermostat wiring and connections
- E7: Refrigerant pressure error - Check charge and pressure switches
- E8: Temperature sensor error - Verify sensor operation and wiring
Manual Downloads
Current Model Manuals
GMVC96 / GSXC18
96% AFUE Furnace & 18 SEER AC
GMVC80 / GSXC16
80% AFUE Furnace & 16 SEER AC
GMEC96 / GSXC18
96% ECM Furnace & 18 SEER AC
GMS8 / GSX14
Single Stage Furnace & 14 SEER AC
Popular Previous Models
GMS9 / GSX13
90% Furnace & 13 SEER AC
GMP / GSC13
80% Furnace & 13 SEER AC
GKS9 / GSC13
90% Upflow Furnace & AC
GMS / GSC10
Standard Efficiency System