LG ARUN168BTE4 Installation Manual

The LG ARUN168BTE4 is a high-efficiency air conditioning unit designed for residential and commercial use. This installation manual provides comprehensive guidance for proper setup, including safety precautions, mounting instructions, electrical connections, refrigerant piping, drainage system setup, and initial startup procedures. Below are key sections covering all aspects of installation and initial configuration.

1. Safety Precautions 2. Package Contents 3. Unit Specifications 4. Installation Requirements 5. Mounting Instructions 6. Electrical Connections 7. Refrigerant Piping 8. Drainage System 9. Initial Startup 10. Commissioning 11. Troubleshooting

Safety Precautions

Before installation, read all safety instructions carefully to prevent injury and equipment damage.

Hazard Type	Precaution
Electrical Shock	Disconnect power before installation; use proper grounding
Heavy Lifting	Use proper lifting equipment; minimum 2-person lift required
Refrigerant Handling	Wear protective gloves and goggles; avoid open flames
Sharp Edges	Wear protective gloves during handling
High Pressure	Check for leaks before full system pressurization

Package Contents

Unpack and verify all components are present before beginning installation.

Outdoor Unit - ARUN168BTE4
Installation manual and warranty card
Mounting brackets and hardware kit
Communication cable (3-core shielded)
Drain hose extension
Pipe cover set
Remote controller with batteries

WARNING! Do not discard packaging until all components are verified. Report missing items immediately.

Unit Specifications

Model: ARUN168BTE4
Cooling Capacity: 16,000 BTU/h
Power Supply: 208-230V, 60Hz, 1Phase
Refrigerant: R410A
Operating Current: 7.2A (Cooling)
Sound Level: 54 dB (Outdoor)
Net Weight: 98 lbs (44.5 kg)
Pipe Connections: Liquid 3/8", Gas 5/8"
Max Pipe Length: 82 feet

Installation Requirements

Ensure all prerequisites are met before installation begins.

Clearance: Minimum 12 inches on all sides for airflow
Mounting Surface: Solid concrete or reinforced wall
Electrical: Dedicated circuit with proper disconnect
Tools Required: Torque wrench, flaring tool, vacuum pump, manifold gauge
Certification: Installer must be EPA certified for refrigerant handling

CAUTION! Installation by unqualified personnel may void warranty and create safety hazards.

Mounting Instructions

Proper mounting ensures stable operation and reduces vibration noise.

Select mounting location meeting clearance requirements
Mark and drill holes for mounting brackets
Secure brackets with provided expansion bolts
Lift unit onto brackets using proper equipment
Secure unit to brackets with anti-vibration pads
Ensure unit is level in all directions

Tip: Use spirit level to ensure perfect horizontal alignment.

Electrical Connections

Follow local electrical codes and manufacturer specifications.

Connection	Specification
Power Supply	208-230V ±10%, 60Hz
Circuit Breaker	20A dedicated
Wire Size	12 AWG minimum
Grounding	Proper earth ground required
Communication	Shielded 3-core cable

WARNING! All electrical work must be performed by licensed electrician.

Refrigerant Piping

Proper piping ensures optimal performance and efficiency.

Cut pipes to required length with pipe cutter
Deburr and clean pipe ends thoroughly
Flare connections to 45-degree angle
Apply minimal refrigerant oil to flare surfaces
Connect liquid and gas pipes with proper torque
Perform leak test with nitrogen at 150 PSI
Evacuate system to 500 microns vacuum

CAUTION! Over-torquing can damage flare connections and cause leaks.

Drainage System

Proper drainage prevents water damage and ensures efficient operation.

Install drain hose with continuous downward slope
Use insulated drain hose in unconditioned spaces
Ensure drain trap is installed if required
Test drainage with water before finalizing
Secure all connections with hose clamps

Tip: Minimum slope of 1/4 inch per foot for proper drainage.

Initial Startup

Follow startup sequence carefully for proper system initialization.

Verify all connections are secure and proper
Remove service port caps slowly to release refrigerant
Power on system at electrical disconnect
Set remote controller to cooling mode
Verify compressor and fan operation
Check for abnormal noises or vibrations
Measure temperature differential across coils

WARNING! Do not operate without proper refrigerant charge.

Commissioning

Final verification ensures optimal performance and warranty validation.

Refrigerant Charge: Verify superheat and subcooling
Airflow: Check supply and return airflow
Temperature: Measure temperature drop across evaporator
Pressure: Verify operating pressures within specifications
Electrical: Check voltage and current draw
Documentation: Complete commissioning report

Troubleshooting

Symptom	Possible Cause	Corrective Action
Unit not starting	Power supply/breaker	Check disconnect switch; verify circuit breaker; check voltage
Poor cooling	Refrigerant charge/airflow	Check refrigerant levels; clean filters; verify airflow
Water leakage	Drain blockage	Clear drain line; check slope; ensure proper trap
Unusual noise	Vibration/component	Check mounting; inspect fan blades; verify compressor
Error codes	Sensor/communication	Refer to service manual; check sensor connections

Reset: Power cycle unit; check error history in controller.

Service: Contact LG authorized service center for technical support.