Indirect heating
An indirect substation is used when district heating network conditions, such as pressure and temperature, do not allow direct connection. When a substation is connected indirectly, a heat exchanger provides energy-efficient heat transfer. It also ensures that the primary network supply side and the secondary building installation side remain safely separated.
An indirect substation is used when district heating network conditions, such as pressure and temperature, do not allow direct connection. When a substation is connected indirectly, a heat exchanger provides energy-efficient heat transfer. It also ensures that the primary network supply side and the secondary building installation side remain safely separated.
In this way, the building application works regardless of pressure or temperature variations in the district heating network (hydronic balancing) and is safe from pipe breaks or leaks.
Danfoss indirect substations are self-contained units that are generally wall-mounted. They can support single or multiple heating circuits, with or without domestic hot water production on the primary or secondary side.
These advanced solutions are also available with an electronic controller for weather compensation. This ensures easy and energy-efficient operation while simultaneously allowing central monitoring and energy consumption transparency.
Features and benefits
Advanced solutions available also with an electronic controller for weather compensation
Indirect substations with Micro Plate™ heat exchangers provide energy efficient heat transfer
District Heating Substations operating guide
Use this document for planning indirect heating / cooling, dhw production and other water based heating systems. Can be used for DSA; DPS; DSE; DSS; DSM; and DSC product types.
Smaller, lighter, more efficient: Danfoss' compact substation DSA1 Mini
Learn how the station is installed, as well as tips and tricks for commissioning and maintenance.
Video:
Products shown: 36
DSA1 HOME
The DSA HOME is designed for use in high-parameter district heating networks. Suitable for heating single houses. It provides an alternative solution to an oil or gas boiler. The DSA Home is designed for heating or heating and domestic hot water. The wall-mounted construction saves space needed for installation and servicing.
DSA1 WALL
The DSA WALL is designed for use in high-parameter district heating networks. Suitable for heating single and multifamily houses and commercial and industrial buildings. It provides an alternative solution to an oil or gas boiler. The DSA WALL is designed for heating, domestic hot water and floor heating. The wall-mounted construction saves space needed for installation and servicing.
DSA2
The DSA HOME is designed for use in high-parameter district heating networks. Suitable for heating single houses. It provides an alternative solution to an oil or gas boiler. The DSA Home is designed for heating or heating and domestic hot water. The wall-mounted construction saves space needed for installation and servicing.
DSP 1 MAXI
District heating transfer stations provide the link between district heating suppliers and customers’ systems. They incorporate the necessary equipment to tailor the supplied heat to the needs of the object premises as specified in the heating supply contract. In this they need to comply with all applicable standards and with the supplier’s technical connection conditions.Indirect connections (in which district heating and in-house systems are hydraulically isolated)incorporate components to separate the systems (heat exchanger), to limit the flow volume to that specified in the contract, regulate the secondary supply temperature and measure the energy consumption.
DSP MOD
District heating transfer stations provide the link between district heating suppliers and customers’ systems. They incorporate the necessary equipment to tailor the supplied heat to the needs of the object premises as specified in the heating supply contract. In this they need to comply with all applicable standards and with the supplier’s technical connection conditions. Indirect connections (in which district heating and in-house systems are hydraulically isolate) incorporate components to separate the systems (heat exchanger), to limit the flow volume to that specified in the contract, regulate the secondary supply temperature, and measure the energy consumption. The system described here is a standard type in which one different types of applications can be connected on the secondary
DSP1 SMALL
The DSP MINI is designed for use in district heating networks, suitable for heating and for providing DHW for single family houses. It provides an alternative solution to an oil or gas boiler. The DSP MINI is designed for heating, domestic hot water and floor heating. The wall-mounted construction saves space which is needed for installation and service. The DSP MINI is designed as a wall-mounted sta tion. Each station is equipped with micro plate heat exchangers for DHW and optional for heating manufactured by Danfoss, which significantly increase substation performance and lifetime. All components are placed at the front of the station, which makes it very easy to access them during maintenance or servicing. The mounting bracket significantly reduces the time required to mount the substation to the wall. The connections are predefined and allow installers to prepare installation before station is available on the site, which reduces the time between delivery and startup.
DSS1 MAXI
District heating transfer stations provide the link between district heating suppliers and customers’ systems. They incorporate the necessary equipment to tailor the supplied heat to the needs of the object premises as specified in the heating supply contract. In this they need to comply with all applicable standards and with the supplier’s technical connection conditions. Indirect connections (in which district heating and in-house systems are hydraulically isolated) incorporate components to separate the systems (heat exchanger), to limit the flow volume to that specified in the contract, regulate the secondary supply temperature and measure the energy consumption. The system described here is a standard type where primary medium is steam. On secondary heating circuits or modules can be connected optional.
Termix Compact 28 VX-FI-PS
The Termix Compact 28 VX-FI is a heat exchanger unit for the production of heating in large buildings such as sports centres, schools, blocks of flats etc. It can be used for connection to indirect district heating in places where the district heating plant requires a hydraulic break on the plant side. It is also suitable for conversion to district heating when the secondary heating system is unsuitable to being connected to direct district heating or when a particularly effective security against leakage in the heating system is required. It is possible to connect a hot-water tank.
Termix VX
The Termix VX is a complete solution for space heating with optimal safety, efficient energy transfer, servicefriendly construction and a compact design. The substation is used if a heat exchanger is required or on a conversion to district heating where the existing equipment is unsuitable for direct connection. The Termix VX substation is ideal, when a high level of security against burst pipes and water damage in the heating system is required
Termix VX Compact 28
The Termix VX Compact 28 is a complete solution for space heating with optimal safety, efficient energy transfer, service-friendly construction and a compact design. The substation is applicable, if a heat exchanger is required or on a conversion to district heating, where the existing equipment is unsuitable for direct connection. The Termix VX Compact 28 substation is ideal, where a high level of security against burst pipes and water damage in the heating system is required.
Termix VX FI
The Termix VX is a complete solution for space heating with optimal safety, efficient energy transfer, service-friendly construction and a compact design. The substation is used if a heat exchanger is required or on a conversion to district heating where the existing equipment is unsuitable for direct connection. The Termix VX substation is ideal, when a high level of security against burst pipes and water damage in the heating system is required
VX Solo 22
The VX Solo 22 is made in a compact design and is especially suitable for supply of heating for small properties and apartment houses. The substation is suitable for two pipe systems. The substation features a plate heat exchanger for the heating circuit and it is prepared for connection to a domestic hot water cylinder. The VX Solo 22 is available in two basic variants, - one variant with Danfoss ECL 310 for control of the heating circuit, and another variant with Danfoss ECL 310 for control of both the heating as well as the DHW cylinder circuits. The VX Solo 22 variants offer capacities ranging from 44 to 110 kW heating and 13 to 75 kW domestic hot water. Please contact our sales department and together we shall find the optimum solution for your exact requirements.
VX Solo II
The VX Solo II is a substation featuring high performance and simple operation. The VX Solo II is especially suitable for two-pipe systems and systems with floor heating. VX Solo II is available in various variants. The circuit diagram and the technical data on the back page illustrates VX Solo II HWS with 1 heating circuit and secondary connection for DHW cylinder, however, variants with 2 heating circuits, mixing loop and primary connection for cylinder are also available
VX Solo II HWS (A237)
The VXe Solo HWS (ECL 310/A337) is a fully insulated substation for indirect heating with one heating circuit and secondary connection for DHW cylinder featuring high performance and simple operation. VXe Solo HWS is especially suitable for two-pipe systems such as systems with radiator or floor heating. Designed for wall-mounting with pipes connection in bottom. The heating circuit and the cylinder temperature is controlled by electronic temperature controller Danfoss ECL 310/A337
VXe Solo H
The VXe Solo H (ECL 310/A237) is a fully insulated substation for indirect heating with one heating circut featuring featuring high performance and simple operation. VXe Solo H is especially suitable for twopipe systems such as systems with radiator or floor heating. Designed for wall-mounting with pipes connection in bottom. The heating circuit is controlled by electronic temperature controller Danfoss ECL 310/A237.
VXe Solo H OP
The VXe Solo H OP (ECL 310) is a fully insulated substation for indirect heating with one heating circuit without circulation pump. VXe Solo H OP is especially suitable for twopipe systems such as systems with radiator or floor heating. Designed for wall-mounting with pipes connection in bottom. The heating temperature is controlled by an electronic temperature controller Danfoss ECL 310 with weather compensation.
VXe Solo HWP
The VXe Solo HWP (ECL 310/A337) is a fully insulated substation for indirect heating with one heating circuit and primary connection for DHW cylinder featuring high performance and simple operation. VXe Solo HWP is especially suitable for two-pipe systems and systems such as systems with radiator or floor heating. Designed for wall-mounting with pipes connection in bottom. The heating circuit and the cylinder temperature is controlled by electronic temperature controller Danfoss ECL 310/A337.
