Skip to main content
Danfoss

DSE Flex

Submit inquiry

DSE FLEX is a compact substation platform designed for indirect district heating with up to 3 circuits with possibility to make combinations between modules if more circuits are required.

Maximum capacity is determined by temperature, allowable pressure drops and local regulations. HE 560 kW, DHW 590 kW. It is an exclusive solution designed to optimally fulfill specific requests and stringent requirements for district heating. Only available on request.

Features and benefits

  • Flexible substation design saves space and makes installation easy. 

  • Suitable for various applications such as heating, domestic hot water and/or other water based heating systems. 

  • Suitable for heating of multifamily houses, commercial and industrial buildings. 

  • The substation is floor mounted, has a light profile, compact size and is designed for fast and safe transportation.

  • Pre‑assembled & factory‑tested – Ensures quick commissioning, reliable operation, and reduced installation costs.

  • Efficient heat transfer & hydronic balancing – Improves energy efficiency and system performance.

  • Robust, service‑friendly construction – Durable components with easy access for maintenance, lowering lifecycle costs.

  • Scalable & compliant – Meets district heating standards and allows future expansion or adaptation.

High performance district heating solutions – DSA HOME, DSA WALL & DSE FLEX

Experience efficient, reliable district heating with DSA HOME, DSA WALL, and DSE FLEX. This brochure reveals how each pre‑configured Danfoss substation delivers heating and domestic hot water with ease, energy efficiency, and lasting quality. 

All feature high‑efficiency MicroPlate™ heat exchangers, precise ECL Comfort control, and remote monitoring via Leanheat® Monitor. Dive into the technical specifications and find the perfect fit for your next project.

Download the brochure
DSA HOME, DSA WALL & DSE FLEX

Documents

Documents
Type Name Language Valid for Updated Download File type
Operating guide DSE FLEX Swedish Multiple 19 Feb, 2018 4.0 MB .pdf
Operating guide DSE FLEX English Multiple 14 Feb, 2018 3.1 MB .pdf
Operating guide DSE FLEX Finnish Multiple 15 Feb, 2018 4.0 MB .pdf
Operating guide DSE FLEX Polish Multiple 19 Feb, 2018 4.1 MB .pdf
Fact sheet DSE FLEX Swedish Multiple 07 Feb, 2018 1.2 MB .pdf
Fact sheet DSE FLEX Finnish Multiple 07 Feb, 2018 1.2 MB .pdf
Fact sheet DSE FLEX English Multiple 07 Feb, 2018 1.2 MB .pdf
Fact sheet DSE FLEX Polish Multiple 07 Feb, 2018 1.2 MB .pdf
Brochure Flexible station design saves you space and makes installation easy English Multiple 16 Mar, 2015 1.1 MB .pdf
Brochure Flexible station design saves you space and makes installation easy Finnish Finland 07 Jun, 2015 1.1 MB .pdf
Brochure Flexible station design saves you space and makes installation easy Polish Poland 07 Jun, 2015 1.1 MB .pdf
Brochure Flexible station design saves you space and makes installation easy Swedish Sweden 07 Jun, 2015 1.1 MB .pdf

Videos

Split DSE Flex in parts
Split DSE Flex in parts
Full insulation of DSE Flex reduces the energy loss
Make your connections easier with DSE Flex
The compact dimensions of DSE Flex makes it easy to move inside buildings
Positioning of DSE Flex with adjustable feet

FAQ

Is the DSE FLEX controller pre-configured from the factory?

Yes, it is preset according to available data. After commissioning, it performs a self-test, displays a default system code, and enters operating mode. Fine-tuning should follow the controller manufacturer’s manual attached to the station.

What should I check before commissioning?

Ensure all hydraulic and electrical connections are correct, water quality meets Danfoss guidelines, and the controller manual is available for precise settings.

What water quality is required for optimal performance?

Follow the Danfoss Guideline to Water Quality for Copper Brazed Plate Heat Exchanger (VJ.KV.D3.02 or newer) to maximize heat exchanger performance and lifetime.

What causes excessive noise in the system?
  • Incorrect pump setting
  • Missing hydraulic setup
  • Flow noise in pipes or foreign objects in piping
  • Loose parts in components (e.g., non-return valve springs)
  • Incorrect system dimensioning (e.g., undersized control valve)
  • Defective control valve or pump impeller
How can I fix excessive noise?

Check and correct pump and hydraulic settings, rinse the substation, inspect valves, and replace defective components as needed.

What are common reasons for no heat?
  • Clogged strainers or filters
  • Defective differential pressure controller, sensor, actuator, or thermostat
  • Dirt in control valve housing
  • Incorrect or defective automatic controls / power failure
  • Pump not operating or set to low speed
  • Air in the system
How can I restore heating?

Clean strainers and filters, check and replace defective components, verify controller settings and power supply, adjust pump speed, and vent the system thoroughly.

Are there specific safety precautions for DSE FLEX?

Yes, follow the safety section in the operating guide, including electrical isolation before maintenance, correct handling during installation, and adherence to water quality standards

Related products

Heating Valves
Valves

Take control of water flows in HVAC and District energy systems with our hydronic balancing and control valves, motorized control valves, shut-off valves and butterfly valves.

Energy metering
Energy metering

Keep accurate track of energy consumption in any heating or cooling system for transparent cost allocation with our range of energy meters and automatic meter reading solutions.

Heat exchangers
Heat exchangers

Optimize the heat transfer in HVAC, District energy and freshwater systems with our brazed, gasketed and welded heat exchangers or freshwater distillers.

Stations and domestic hot water
Stations and domestic hot water

Safely produce, store and distribute hot water in direct and indirect heating systems with our substations, flat stations and charging systems

Electronic controls
Electronic controls

Run your District energy system the intelligent way with our electronic Comfort controllers and matching application keys and add an optional monitoring solution to remotely streamline service, maintenance and commissioning.

Differential pressure and flow controllers
Differential pressure and flow controllers

Optimize efficiency by reducing heat losses in district energy, heating or cooling systems by establishing a dynamic hydronic balance with our differential pressure and flow controllers.

Leanheat® Software Suite & Services
Leanheat® Software Suite & Services

Danfoss Leanheat® Software Suite & Services is an application-driven suite of the end-to-end software and services that harnesses the power of digitalization to optimize energy production and consumption, increase operational efficiencies, and put building control and maintenance in your hands.

Related applications

District heating
District heating

Unlock the grids full potential with end-to-end district energy solutions and get actionable insights enabling continuous optimization and optimal temperature control on both demand and supply side.

Buildings – commercial
Buildings – commercial

Tailored solutions for commercial buildings provide considerable energy, emissions, and cost savings without compromising quality or comfort.

News