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The values in parentheses are valid for the LI 24TEL/ LI 28TEL

6.3Heating System Connection

The heating system connections on the heat pump have a 1 1/4" external thread. Use a spanner to firmly grip the transitions when connecting the heat pump.

Before connecting the heating water system to the heat pump, the heating system must be flushed to remove any impurities, residue from sealants, etc. Any accumulation of deposits in the liquifier could cause the heat pump to completely break down. For systems in which the heating water flow can be shut off via the radiator or thermostat valves, an overflow valve must be in- stalled in a heating bypass behind the heat pump by the cus- tomer. This ensures a minimum heating water flow rate through the heat pump and helps to avoid faults.

Once the heating system has been installed, it must be filled, de- aerated and pressure-tested.

Minimum heating water flow rate

The minimum heating water flow rate through the heat pump must be assured in all operating states of the heating system. This can be accomplished, for example, by installing either a manifold without differential pressure or an overflow valve. The procedure for adjusting an overflow valve is described in the Chapter Start-Up.

Antifreeze

A method of manual drainage (see illustration) should be pro- vided for heat pumps which are exposed to frost. The antifreeze function of the heat pump controller is active whenever the con- troller and the heat circulating pump are ready for operation. If the heat pump is taken out of service or in the event of a power failure, the system has to be drained. The heating circuit should be operated with a suitable antifreeze if heat pump systems are implemented in buildings where a power failure can not be de- tected (holiday home).

6.4Electrical Connection

The power supply and control voltage are supplied using stand- ard cables (load: 4-core, control: 3-core).

For detailed instructions on how to connect the external compo- nents and how the heat pump controller functions, please refer to the device connection diagram and the operating manual sup- plied with the controller.

An all-pole disconnecting device with a contact gap of at least 3 mm (e.g. utility blocking contactor or power contactor) as well as a 3-pole circuit breaker with common tripping for all external conductors must be installed in the power supply (tripping current in compliance with the Device Information).

Ensure that the incoming supply has a clockwise rotating field when connecting multiphase devices L1; L2; L3.

ATTENTION!

Ensure that there is a clockwise rotating field: Operating the compressor in the wrong rotational direction could cause damage to the compressor.

The control voltage must be protected by a 10 A fuse.

For detailed information, see Circuit Diagrams in the Appendix.

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Dimplex LI 24 TEL, LI 28TEL, LI 20TEL manual Heating System Connection, Electrical Connection
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LI 28TEL, LI 24 TEL, LI 20TEL specifications

Dimplex is a renowned name in the electric heater market, and its LI series, comprising the LI 20TEL, LI 24TEL, and LI 28TEL models, exemplifies innovation in energy-efficient heating solutions. These wall-mounted convection heaters combine sleek design with advanced technologies to meet the diverse needs of modern living spaces.

The LI 20TEL is a compact unit, specifically designed for smaller rooms or spaces where efficiency is paramount. With a capacity of 2000W, it delivers rapid warmth while maintaining energy efficiency. Its built-in thermostat allows for precise temperature control, ensuring that the desired comfort level is consistently achieved. This model also features a silent operation, making it suitable for bedrooms or offices where noise levels should be kept to a minimum.

The LI 24TEL, the middle variant in the series, offers a power output of 2400W, which is optimal for medium-sized areas. This model comes equipped with advanced technology that enhances its energy efficiency, including a programmable timer and multiple heat settings. Homeowners can easily customize their heating schedules to suit their daily routines, further reducing energy costs. This model also includes safety features such as an overheat protection mechanism, ensuring peace of mind during use.

The LI 28TEL stands as the most powerful option in the lineup, with a robust 2800W output, making it ideal for larger rooms or open-plan spaces. This model not only provides rapid heating but also employs advanced convection technology to circulate warm air efficiently throughout the room. Its external casing is designed to remain cool to the touch, providing an added layer of safety for homes with children or pets. Additionally, the LI 28TEL includes Wi-Fi connectivity, allowing users to control the unit remotely via a smartphone app, making it a truly modern heating solution.

In summary, the Dimplex LI series - LI 20TEL, LI 24TEL, and LI 28TEL - represents an excellent blend of modern aesthetics and high-performance heating technology. Each model is equipped with features tailored to different space requirements, from compact efficiency to powerful output. With energy-saving options, programmable settings, and enhanced safety features, Dimplex continues to lead the way in providing high-quality electric heating solutions for today's energy-conscious consumers.
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