The Dimplex SIH 40TE is a brine-to-water heat pump designed for indoor installation, suitable for both heating and domestic hot water preparation. This device is an efficient and environmentally friendly solution for residential and commercial applications, particularly in new constructions or renovation projects where a sustainable heating system is desired.
Function Description
The SIH 40TE operates by extracting thermal energy from a brine circuit (ground collector or groundwater) and transferring it to the heating water circuit of a building. This process is achieved through a refrigeration cycle involving a compressor, evaporator, condenser, and expansion valve. The heat pump can effectively utilize low-temperature energy sources, making it highly efficient. It is designed to work with both underfloor heating systems and conventional radiators, and can also provide domestic hot water. The integrated control system manages the entire heating process, ensuring optimal performance and energy efficiency. The unit is equipped with various sensors to monitor temperatures and pressures, allowing for precise control and fault detection.
Important Technical Specifications
The SIH 40TE is a robust unit with a compact design for indoor installation. Key technical specifications include:
- Type and Order Code: SIH 40TE.
- Design: Brine-to-water heat pump for indoor installation.
- Protection Class: IP 21.
- Operating Temperature Limits: Heating water flow up to 70°C, brine inlet temperature from -5°C to +25°C.
- Antifreeze: Monoethylene glycol, 25% concentration.
- Heating Output / COP (Coefficient of Performance):
- At B0/W35: 9.8 kW / 5.0
- At B5/W55: 28.9 kW / 2.4
- At B0/W45: 10.6 kW / 3.1
- At B0/W50: 31.7 kW / 3.2
- At B0/W35: 13.5 kW / 2.5
- At B5/W55: 33.1 kW / 3.1
- At B0/W45: 13.7 kW / 2.4
- At B0/W50: 34.2 kW / 4.1
- At B0/W35: 18.6 kW / 4.4
- At B5/W55: 17.9 kW / 4.3
- Sound Power Level: 65 dB(A) (according to EN 12102).
- Sound Pressure Level at 1m Distance: 50 dB(A).
- Heating Water Flow with Internal Pressure Differential: 3.2 m³/h / 1100 Pa.
- Brine Flow with Internal Pressure Differential: 11.0 m³/h / 8800 Pa.
- Refrigerant: R134a / 8.0 kg.
- Lubricant: Polyolester (POE) / 6.5 litres.
- Dimensions (H x W x L): 1890 x 1350 x 775 mm.
- Connections:
- Heating system: G 1 1/2" internal/external.
- Brine circuit: G 2" internal/external.
- Weight: 502 kg.
- Electrical Connection: 3~PE 400 V AC, 50 Hz.
- Nominal Voltage / Fuse Protection: 400/50 V / A.
- Nominal Power Consumption: 8.36 kW.
- Starting Current with Soft Starter: 84 A.
- Max. Absorbed Compressor Power: 65 W.
- Water in Device Protected Against Freezing: Yes.
- Performance Levels: 2.
- Control: Internal.
- Operating Overpressure (Heat Source/Heat Sink): 3.0 bar.
The heat pump is equipped with a soft starter to reduce starting current peaks, protecting the electrical installation. It also features a thermal energy meter (WMZ) to monitor the quantity of heat supplied, which is crucial for billing and performance analysis.
Usage Features
The SIH 40TE is designed for user-friendly operation and integration into various heating systems.
- Installation: The unit must be installed indoors in a frost-free, dry, and horizontally level space. A minimum clearance of 1 meter in front of the heat pump is required for maintenance. The transport of the unit requires careful handling, ensuring it remains upright or tilted no more than 45 degrees.
- Control System: The heat pump manager provides comprehensive control over the heating system. It supports various communication protocols like Modbus, EIB, and KNX, allowing for integration into building management systems. The manager monitors and controls all relevant parameters, including temperatures, pressures, and flow rates, to ensure efficient operation.
- Domestic Hot Water: The SIH 40TE can be integrated with a domestic hot water tank to provide hot water for household use, making it a versatile solution for complete heating and hot water needs.
- Safety Features: The heat pump includes several safety measures, such as frost protection for the water in the device, and various sensors to prevent overheating or overpressure. It is crucial to ensure that the brine circuit contains at least 25% antifreeze agent (monoethylene glycol or propylene glycol) to prevent freezing.
- Noise Emissions: The heat pump is designed for quiet operation, with sound-decoupling measures to minimize noise transmission to the building structure.
Maintenance Features
Regular maintenance is essential to ensure the long-term reliability and efficiency of the SIH 40TE.
- General Maintenance: The manual emphasizes the importance of regular checks and maintenance by qualified personnel. This includes inspecting the heat pump manager, the heat source and heat distribution systems, and all connections.
- Cleaning: Regular cleaning of the heating side and heat source side is recommended. For the heating side, a suitable cleaning agent (e.g., 5% phosphoric acid solution) can be used to remove deposits. For the heat source side, a mild cleaning agent is recommended to prevent damage to the evaporator. The brine filter should be checked and cleaned regularly to maintain optimal flow and prevent pressure drops.
- Refrigerant Circuit: The refrigerant circuit is hermetically sealed and requires inspection for leaks every five years, as per EU directive 842/2006. Leakage tests must be documented by certified personnel.
- Commissioning: Initial commissioning must be performed by an authorized and qualified customer service technician to ensure proper setup and optimal performance. This includes checking all connections, filling and venting the heating and brine circuits, and verifying the correct operation of all components.
- Troubleshooting: The heat pump manager display provides information on malfunctions and error codes, facilitating quick diagnosis. In case of persistent issues, contacting the after-sales service is recommended. Disconnecting electrical power is a crucial safety step before any maintenance work.
The Dimplex SIH 40TE is a sophisticated and reliable heat pump system that offers an efficient and environmentally friendly solution for heating and domestic hot water, provided it is installed and maintained according to the manufacturer's guidelines.
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