Installation and Maintenance Manual for Hisense Hi-Therma Heat Pump Outdoor Unit

Quick Guide from the Manual

This manual provides essential instructions for the installation, operation, and maintenance of the Hisense Hi-Therma heat pump outdoor unit. Key procedures include proper site selection, water and refrigerant piping, electrical wiring, and system configuration via DIP switches. Always ensure installation is performed by qualified personnel.

Safety Precautions

The unit uses R32 refrigerant, which is flammable. Strict adherence to safety protocols is required:

• Ensure the installation area is well-ventilated.
• Keep ignition sources away from the unit.
• Do not mix the unit with general household waste at the end of its life; dispose of it according to local regulations.
• Always disconnect the power supply before performing any maintenance or electrical work.
• Ensure the unit is properly grounded.

Installation and Handling

Proper placement is critical for system performance and safety:

• Install the unit in a shaded area, away from direct sunlight and heat sources.
• Ensure the foundation is solid and stable.
• Maintain required clearances around the unit to ensure proper airflow and maintenance access.
• Use appropriate lifting equipment and ensure the unit remains stable during transport.

Water Piping and Connections

The water circuit must be installed correctly to prevent leaks and ensure efficiency:

• Install a water filter at the inlet to protect the heat exchanger.
• Use flexible joints to minimize vibration.
• Ensure all connections are tight and leak-free.
• The system must be filled and purged of air before operation.
• Check water pressure; the operating range is typically 1 to 3 bar.

Electrical Wiring and Configuration

Electrical work must comply with local regulations:

• Verify the power supply voltage and frequency match the unit specifications.
• Use appropriate cable sizes and circuit breakers as specified in the manual.
• Ensure all electrical connections are secure and properly grounded.
• Configure the system using the DIP switches on the PCB (Printed Circuit Board) to set unit capacity, pump operation, and emergency modes.

Test Run and Maintenance

Before starting the system, perform a thorough check:

• Verify all electrical connections and grounding.
• Ensure all service valves are fully open.
• Check that the water circuit is filled and air is purged.
• Perform a test run to ensure the system operates correctly.
• Regularly inspect the unit for leaks, debris, and proper ventilation.