DSA WALL & DSA HOME heating substation for indirect systems

Standard heating substations guaranteeing high system performance

The DSA WALL and DSA HOME heating substations are designed for indirect central heating systems, domestic hot water, floor heating, air conditioning, and more. The substations are equipped with all the necessary devices to regulate heat for the building in accordance with the specifications of the heat supply agreement.

DSA HOME is suitable for single-family homes, apartment buildings, commercial, and industrial facilities. It combines DN20 piping suitable to convey 25 kW for heating and a separate circuit offering up to 40 kW for domestic hot water, with a compact design for efficient installation and operation.
DSA WALL caters to apartment buildings, commercial, and industrial buildings, delivering up to 145 kW for heating and 120 kW for domestic hot water. The DN 25-40 piping to heating circuits supports higher capacity demands. It ensures compatibility with high-parameter district heating networks.

DSA HOME and DSA WALL meet over 90% of technical connection requirements for typical district heating networks. Their modular design allows for configuration of one or two circuits, with easy expansion to a three-circuit substation, ensuring adaptability to diverse heating needs.

Features and benefits

Easy Access to Key Components: Facilitates quick servicing and maintenance, minimizing downtime and ensuring continuous operation.
Advanced Sealing System: Ensures safe, leak-free primary connections, enhancing safety and system integrity.
Optional Insulation: Minimizes heat loss, enhancing energy conservation and reducing utility expenses.
ECL Comfort Electronic Controller: Provides precise control of heating and domestic hot water circuits, ensuring optimal system performance and energy efficiency.
SCADA Access via ECL Portal: Enables remote monitoring and management, offering convenience and enhanced operational oversight.
MicroPlate™ Brazed Heat Exchangers: Incorporates patented plate technology for superior heat transfer, maximizing thermal efficiency and system reliability.
Class A Circulation Pumps: Delivers high performance with low energy consumption, reducing operational costs and environmental impact.

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.

DSA HOME is tailored for single‑family homes, DSA WALL suits residential, commercial, and industrial buildings with space‑saving wall‑mounted convenience, and DSE FLEX offers versatile connections for multifamily residential, commercial, and industrial applications.

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

Explore the DSA WALL – Unique features, smart installation & easy maintenance

Discover the DSA WALL district heating station – easy to mount, versatile, and built for efficient heating. This animation pans over the station, highlighting its unique design, modular flexibility, and advanced features.

Learn mounting options, multiple pipe connections, pump protection, draining, cleaning strainers, and replacing the heat exchanger. Check out the animation for practical tips that make installation and servicing simple, safe, and efficient.

Play animation

Documents

Documents
Type	Name	Language	Valid for	Updated	Download	File type
Operating guide	DSA HOME	English	Multiple	20 Sep, 2017	4.6 MB	.pdf
Operating guide	DSA HOME	Polish	Poland	28 Sep, 2017	4.6 MB	.pdf
Operating guide	DSA WALL	Swedish	Multiple	06 Apr, 2015	5.0 MB	.pdf
Operating guide	DSA WALL	Finnish	Multiple	31 Mar, 2015	4.9 MB	.pdf
Operating guide	DSA WALL	English	Multiple	25 Nov, 2014	5.3 MB	.pdf
Operating guide	DSA WALL	Polish	Multiple	15 Jan, 2015	5.1 MB	.pdf
Data sheet	DSA WALL	English	Multiple	01 Oct, 2025	1.6 MB	.pdf
Data sheet	DSA WALL	Swedish	Multiple	12 Feb, 2026	1.1 MB	.pdf
Data sheet	DSA WALL	Polish	Multiple	12 Sep, 2021	723.0 KB	.pdf
Data sheet	Substations, DSA HOME	English	Multiple	05 Feb, 2026	986.3 KB	.pdf
Data sheet	Substations, DSA HOME	Polish	Multiple	06 Feb, 2026	993.7 KB	.pdf
Data sheet	Substations, DSA WALL	Lithuanian	Multiple	16 Feb, 2026	1.1 MB	.pdf

FAQ

Installer Troubleshooting FAQ – DSA WALL & DSA HOME

The heating circuit is not working – no heat in radiators or floor heating.

Check if the heating circulation pump is running. If not, verify power supply and control signal from the ECL Comfort controller.
Inspect the heating curve settings in the controller – incorrect settings can prevent heat supply.
Bleed air from the heating circuit.
Clean primary and secondary sides filters – blockages reduce flow.
Confirm district heating supply valve is open and supply temperature is within specification.

No domestic hot water (DHW) is being produced.

Check DHW circulation pump operation and electrical connections.
Verify DHW program in the ECL Comfort controller is active.
Test DHW temperature sensor – replace if faulty.
Inspect DHW heat exchanger for scaling or fouling – clean if necessary.
Confirm district heating supply temperature meets DHW requirements.

Heating or DHW temperature is too low.

Adjust heating curve and DHW setpoint in the ECL Comfort controller.
Check supply pressure and temperature from the district heating network – contact utility if below spec.
Clean heat exchanger and filters.
Increase pump speed or replace pump if defective.

Leakage on the primary side pipe connections.

Shut down system and relieve pressure before inspection.
Check gasket seating – reseat or replace if needed.
Tighten connections to Danfoss torque specifications.
Replace damaged gaskets or O‑rings.

ECL Comfort controller or SCADA (ECL Portal) is not communicating.

Verify controller power supply.
Check network cable and connections.
Confirm IP settings match network requirements.
Reconfigure SCADA tool according to Leanheat® Monitor setup guide.

The system is noisy (pumps, pipes, or heat exchanger).

Bleed air from heating and DHW circuits.
Check inlet pressure to pumps (expansion vessel gas pressure) – low pressure can cause cavitation.
Secure mounting brackets and check vibration dampers.

Energy consumption is higher than expected.

Review heating curve and DHW setpoint – overly high settings waste energy.
Enable pump control via ECL Comfort controller to avoid continuous running.
Inspect insulation – replace if damaged or missing.
Clean heat exchanger to restore efficiency.

DHW temperature fluctuates during use.

Check DHW temperature sensor accuracy – replace if faulty.
Verify controller settings for DHW hysteresis and control mode.
Inspect DHW pump for intermittent operation.
Clean DHW heat exchanger – fouling can cause unstable temperatures.

Heating circuit pressure drops frequently.

Inspect for leaks in secondary circuit.
Check expansion vessel charge pressure – recharge if needed.
Bleed air from system.
Verify fill valve operation.

What’s the quickest way to isolate a fault in a multi‑circuit DSA WALL?

Close valves to each circuit one at a time.
Observe system response – if heating or DHW returns, the isolated circuit is the source of the fault.
Focus troubleshooting on that circuit’s pump, controller settings, and heat exchanger.

Are there any common mistakes to avoid during service?

Replacing sensors without checking controller diagnostics – many “sensor faults” are wiring or setting issues.
Forgetting to clean filters before suspecting heat exchanger fouling.
Over‑tightening primary connections – can damage gaskets.
Not checking district heating supply parameters before adjusting internal settings.

What spare parts should installers keep on hand?

Gasket and O‑ring kit for primary connections
DHW and heating temperature sensors
Circulation pump (A‑rated)
Filter elements
Controller backup battery (if applicable)

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