Wiring a Gree 120 cabinet air conditioner involves connecting the indoor and outdoor units, control wiring, and power supply according to the manufacturer's specifications to ensure safe and proper operation.

Key Components and Wiring Overview

1. Indoor Unit Connections
   • The indoor unit contains the fan, evaporator, and control board.
   • Connect the control wiring from the indoor unit to the outdoor unit using the designated communication lines. These typically include a two- or three-wire connection for signal transmission and thermostat control .
   • Ensure the fan motor and sensors are properly connected to the indoor control board as indicated in the wiring diagram.
2. Outdoor Unit Connections
   • The outdoor unit houses the compressor, condenser fan, and main control board.
   • Connect the power supply to the outdoor unit according to the voltage and amperage specified in the service manual. For a Gree 120 cabinet unit, this is usually single-phase or three-phase AC, depending on the model .
   • Attach the communication wires from the indoor unit to the outdoor unit terminals, ensuring correct polarity and secure connections.
3. Power Supply and Safety Components
   • Install a dedicated circuit breaker rated for the unit's voltage and amperage.
   • Use a disconnect box to safely isolate the unit during maintenance .
   • Ensure all wiring complies with local electrical codes and the manufacturer's specifications.
4. Control Wiring and Thermostat
   • Connect the thermostat or wired controller to the indoor unit control board.
   • Verify that the signal wires are correctly routed and terminated to allow proper communication between the indoor and outdoor units .
   • Some models may support optional Wi-Fi or remote control modules, which require additional wiring as per the installation manual.
5. Wire Types and Gauge
   • Use ductless or multi-strand copper wire suitable for HVAC systems.
   • The wire gauge should match the unit's current requirements, typically 12–14 AWG for control wiring and 10–6 AWG for power lines, depending on distance and load .

Installation Tips

• Always turn off power before starting any wiring work.
• Follow the manufacturer's wiring diagram closely; diagrams may vary slightly between models.
• Double-check all connections for tightness and correct polarity.
• After wiring, perform a system test to ensure the indoor and outdoor units communicate correctly and the unit operates safely. For detailed wiring diagrams and step-by-step instructions, refer to the Gree 120 cabinet air conditioner service manual or the online wiring guides provided by Gree . These resources include visual diagrams showing all terminal connections, wire colors, and control board layouts.