Installation Guide
Tools Needed:
- Refrigeration manifold gauge set
- Vacuum pump
- Tubing cutter and bender
- Torque wrench
- Multimeter
- Leak detector
Step-by-Step Installation
- Select Location: Choose a level concrete pad location with proper clearance (minimum 24 inches on all sides) and away from obstructions.
- Prepare Electrical Connection: Install a dedicated 230V, 60Hz circuit with proper disconnect switch within sight of the unit.
- Install Condenser Unit: Place condenser on vibration-absorbing pad and secure with appropriate fasteners.
- Connect Refrigerant Lines: Connect pre-charged refrigerant lines using proper brazing techniques with nitrogen purge to prevent oxidation.
- Connect Electrical Wiring: Connect line voltage and low voltage wiring according to wiring diagram provided with unit.
- Evacuate and Charge System: Evacuate system to 500 microns, hold for 15 minutes, then release refrigerant charge according to nameplate specifications.
- Test Operation: Start system and verify proper operation, check temperature drop across evaporator coil (typically 15-20°F).
Specifications
| Model Series | GSXC180361 |
| Type | Split System Central Air Conditioner |
| Color | Galvanized Steel / Gray |
| Cooling Capacity | 3 Ton (36,000 BTU/h) |
| SEER Rating | 18 SEER |
| Sound Level | 72 dB (Outdoor Unit) |
| Refrigerant Type | R-410A |
| Refrigerant Charge | 7 lbs 8 oz (Factory Pre-charged) |
| Power Requirements | 230V, 60Hz, 1 Phase, 15A Minimum Circuit |
| Dimensions (HxWxD) | 35 x 31 x 31 inches |
| Weight | 205 lbs |
| Maximum Operating Pressure | 625 PSIG |
Warranty Information
- Compressor Warranty: 10 years limited warranty
- Parts Warranty: 10 years limited warranty
- Functional Parts Warranty: 1 year limited warranty
- Labor Warranty: Optional extended labor warranty available
For warranty service, contact Goodman Manufacturing at 1-877-254-4729 or visit GoodmanMFG.com
Key Features
Copeland Scroll Compressor
Features a durable Copeland scroll compressor with fewer moving parts for quiet, reliable operation and improved energy efficiency compared to piston compressors.
Two-Stage Cooling
Provides two levels of cooling operation - low stage for mild days (67% capacity) and high stage for hot days (100% capacity) - improving comfort and efficiency.
Sound Reduction System
Advanced sound reduction features including compressor sound blanket, swept-wing fan design, and insulated cabinet for quiet outdoor operation.
Corrosion Protection
WeatherGuard™ heavy-gauge galvanized steel cabinet with baked-on powder paint finish provides superior protection against harsh weather conditions.
Smart Coil Technology
Enhanced surface area coil design with louvered fins improves heat transfer efficiency while reducing air resistance for optimal performance.
Diagnostic LED
Built-in diagnostic LED light provides visual fault codes for quick troubleshooting and service diagnosis without additional equipment.
System Components Explained
Condenser Unit
Outdoor unit containing compressor, condenser coil, and fan that releases heat from refrigerant to outside air
Evaporator Coil
Indoor coil installed in air handler or furnace that absorbs heat from indoor air as refrigerant evaporates
Thermostatic Expansion Valve
Precisely meters refrigerant flow to evaporator coil based on cooling demand for optimal efficiency
Filter-Drier
Removes moisture and contaminants from refrigerant system to protect compressor and components
Service Valves
Schrader-type service valves allow for system pressure measurement and refrigerant charging without brazing
Control Board
Microprocessor-based control board monitors system operation and provides diagnostic fault codes
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit not cooling | Power issue, thermostat setting, refrigerant leak | Check circuit breaker, verify thermostat settings, check for refrigerant leaks |
| Insufficient cooling | Dirty filters, low refrigerant, dirty coils | Replace air filters, check refrigerant charge, clean condenser coil |
| Unit cycles on/off frequently | Dirty air filter, oversized unit, thermostat location | Replace filter, verify proper sizing, relocate thermostat if in direct sunlight |
| Unusual noises | Loose parts, debris in fan, failing motor bearings | Tighten all fasteners, clear debris from fan, lubricate or replace motor |
| Water leakage indoors | Clogged condensate drain, frozen evaporator coil | Clear condensate drain line, check airflow and refrigerant charge |
| High energy bills | Dirty coils, low refrigerant, poor insulation | Clean coils, check refrigerant charge, improve home insulation |
Diagnostic LED Codes
- 1 Flash: Low pressure switch open - Check refrigerant charge and pressure switches
- 2 Flashes: High pressure switch open - Check for restricted airflow or overcharge
- 3 Flashes: Low voltage or reverse polarity - Check electrical connections and voltage
- 4 Flashes: Compressor overload - Check compressor windings and capacitors
- 5 Flashes: Outdoor coil temperature sensor fault - Replace sensor
- 6 Flashes: Communication error - Check low voltage wiring between indoor and outdoor units
Manual Downloads
Current Model Manuals
GSXC180361
3 Ton 18 SEER Two-Stage AC
GSXC240481
4 Ton 18 SEER Two-Stage AC
GSXC150301
2.5 Ton 18 SEER Two-Stage AC
GSXC120241
2 Ton 18 SEER Two-Stage AC
Popular Previous Models
GSX140361
3 Ton 14 SEER Single-Stage AC
GSX160481
4 Ton 16 SEER Single-Stage AC
GSXC160301
2.5 Ton 16 SEER Two-Stage AC
GSX130241
2 Ton 13 SEER Single-Stage AC