Installation and Operating Instruction for Dimplex LA 0712C Air-to-Water Heat Pump

Quick guide from the manual

This document provides essential instructions for the installation, operation, and maintenance of the Dimplex LA 0712C air-to-water heat pump. Key requirements include ensuring a level installation surface, maintaining specific clearances for airflow, and verifying electrical connections (clockwise rotating field). Commissioning must be performed by an authorized technician via the heat pump manager.

Intended use

The LA 0712C is designed exclusively for heating and cooling heating water in domestic environments. It is suitable for mono-energetic and bivalent operation. Note: The device is not suitable for operation with a frequency converter.

Transport

During transport, the heat pump must not be tilted by more than 45 degrees in any direction. Use a pallet for transport. Before commissioning, remove the transport locks located on both sides of the base.

Installation

The heat pump must be installed on a permanently level, smooth, and horizontal surface. Ensure the frame lies tightly against the floor for sound insulation and to prevent small animals from entering. Maintain the following minimum clearances for maintenance and airflow:

• 0.5 m and 2.0 m from sides
• 0.4 m from the rear
• 0 m minimum at the front

The air outlet direction should be perpendicular to the main wind direction to allow unrestricted defrosting.

Condensate pipe

Condensed water must be drained frost-free. The condensate pipe must have a minimum diameter of 50 mm and be fed into a sewer. Do not discharge directly into clearing tanks or cess pits.

Assembly

Heating side connection

Before connecting, flush the heating system to remove impurities. Use a spanner to grip transitions. The filling water must be of drinking water quality and pre-filtered (max 5 µm). For systems with large volumes, use demineralized water and a pH stabilizer (min pH 7.5).

Electrical connection

Three lines/cables are required:

• Power supply: Standard 5-core cable with all-pole disconnecting device (min 3 mm contact gap).
• Control voltage: Supplied via the heat pump manager.
• Communication: Shielded line (J-Y(ST)Y ..LG) connecting the heat pump manager to the internal µPC2.

Important: Ensure a clockwise rotating field for the power supply; otherwise, the heat pump will not start.

Commissioning

Commissioning is performed via the heat pump manager. If heating water temperatures are below 7 °C, commissioning is not possible; the buffer tank must be heated to at least 18 °C using a second heat generator. Follow the program in the special functions menu of the manager.

Cleaning and maintenance

Do not use abrasive, acidic, or chloride-based cleaners. Clean the evaporator, fan, and condensate drain of debris (leaves, twigs) before each heating period. Ensure all circuits are disconnected from the power supply before opening the device. Wait at least 5 minutes after disconnecting power to allow electric charges to dissipate.

Troubleshooting

Faults are indicated on the heat pump manager display. Consult the troubleshooting section in the heat pump manager's manual. If the fault persists, contact an authorized after-sales service technician.