Haier Multi-Split Air Conditioner Installation Manual

Introduction

This manual provides comprehensive instructions for the professional installation of Haier Multi-Split Air Conditioner systems. It details safety precautions, installation procedures, refrigerant handling, electrical work, testing, and troubleshooting for the specified models.

Important Safety Information

WARNING: Installation, maintenance, and repair must be performed by qualified and certified personnel only. Improper installation can lead to severe hazards including electric shock, fire, explosion, water leakage, and environmental damage.

• Always adhere to the instructions in this manual and relevant national/local regulations.
• Use only genuine Haier specified parts and accessories.
• Ensure all electrical work complies with standards and uses appropriate safety devices like earth leakage breakers.
• Handle refrigerants (R32) with extreme care. Ensure adequate ventilation and avoid ignition sources.
• Never attempt to dismantle or service the unit yourself.
• Keep children and unauthorized persons away from the installation and operating areas.
• Properly recover and dispose of refrigerants and old units to protect the environment.

CAUTION: Incorrect operations may result in injuries or damage to the equipment.

Safety Symbol Explanations:

• ⚠ Warning: Indicates a critical safety instruction to prevent severe injury or death.
• ❗ Caution: Indicates instructions to prevent minor injury or equipment damage.
• ✔ Instruction: Indicates important information or steps to follow.
• [Grounding Symbol]: Indicates a part requiring grounding.
• [Electric Shock Symbol]: Indicates a risk of electric shock.
• [No Smoking Symbol]: Prohibits smoking in the area.
• [Anti-static Symbol]: Indicates the need for anti-static precautions.
• [Goggles Symbol]: Recommends wearing protective goggles.
• [Fire Hazard Symbol]: Indicates a risk of fire.

Product Overview & Models

This manual covers Haier Multi-Split Air Conditioner systems, including the following outdoor unit capacity classes:

• 3U55S2PR1FA
• 4U71S2PR1FA
• 4U80S2PR1FA
• 5U100S2PS1FA
• 5U125S2PN1FA

The system uses R32 refrigerant, which is flammable.

Installation Procedures

1. Location Selection

Choose a location that is:

• Structurally sound to support the unit and its vibrations.
• Away from living areas to minimize noise impact.
• Provides adequate space for airflow, installation, and maintenance.
• Free from flammable gas leaks.
• Positioned at least 3048mm from electronic devices like TVs and radios to prevent interference.
• Protected from corrosive elements (e.g., sea breeze).
• Not exposed to direct rain, snow, or strong winds.
• Away from heat sources and open flames.
• Consider snow hoods for outdoor units in snowy climates.

2. Installation Drawings

Detailed diagrams illustrate the correct placement of indoor and outdoor units, piping routes, and wiring connections. Ensure proper clearances are maintained for airflow and service access.

3. Outdoor Unit Installation

Mount the outdoor unit securely on a stable base or bracket. Ensure it is level. Connect piping using specified torque values to prevent leaks. Use appropriate tools for flare nut tightening.

4. Installation Limitations

Adhere to maximum refrigerant piping lengths and height differences between indoor and outdoor units for optimal performance. Shorter piping runs are recommended.

Maximum level difference: 15m (outdoor unit higher than indoor), 7.5m (between adjacent indoor units).

5. Refrigerant Piping

Align and tighten flare nuts using specified torque. Apply refrigeration oil to flare surfaces. Purge air from the system using a vacuum pump and check for leaks. Ensure all connections are gas-tight.

6. Pump Down Operation

Perform pump down when relocating or disposing of the unit. This process safely recovers refrigerant by closing valves after a cooling operation.

7. Wiring

All electrical connections must be made by a licensed electrician. Use correct wire types, ensure proper grounding, and connect power and communication lines as per diagrams. The ground wire should be the last to disconnect.

8. DRED Function

If equipped, connect the DRED device output to the outdoor unit's RJ45 connector following specific instructions.

9. Test Running

Verify correct installation by performing a test run. Check piping, wiring, unit compatibility, and refrigerant charge. Ensure all stop valves are open and voltage is correct. The unit may perform an automatic wiring check.

10. Troubleshooting

Consult the troubleshooting table for error codes and LED indicators that help diagnose issues such as communication failures, sensor malfunctions, compressor problems, and refrigerant pressure faults.

Maintenance, Handling & Disposal

Relocation

For relocation, contact your dealer. Follow procedures for system inspection, refrigerant discharge, and recovery.

Maintenance

Maintenance should only be performed by qualified personnel. Ensure proper ventilation and safety measures are in place.

Scrapping & Recovery

Recover refrigerant safely before scrapping. Dispose of the unit and its components responsibly according to environmental regulations.