Direct heating and instantaneous DHW
Direct heating stations with instantaneous domestic hot water preparation are used in single-family houses, where pressure and temperature conditions allow direct connections, but the most common use is in the multi-family buildings with decentralized heating and DHW installations.
Direct heating substation with instantaneous domestic hot water preparation are used in single-family houses, where pressure and temperature conditions allow direct connections, but the most common use is in the multi-family buildings with decentralized heating and DHW installations.
Each building and apartment has a directly connected substation or flat station with integrated production of domestic hot water. Single or multiple heating circuits (e.g. radiator, floor heating system) are supplied with heated water from the central heat source.
Today, renovated or new buildings are obliged to make at least partial use of renewable energy sources. Modern central heating systems can use buffer tanks to combine different energy sources.
All buildings must comply with strict DHW hygiene regulations.
Product Highlights
- Integrated components ensure safe operation, increases durability and minimize whole life costs
- Compact design - Minimum space required for installation
- Electronic or flow/thermostatic control of heating and domestic hot water
- Operates independently of differential pressure and flow temperature
- Low energy loss
- Domestic hot water is produced on demand, without storing and with Min. risk of lime scale and bacteria formation
- Heating systems can combine different energy sources
- If the volume of water held between the water heater and the taps is less than 3 liters, no regular hygienic testing is required.
Product types shown: 3
EvoFlat FSS
Product
The EvoFlat FSS is a compact and user-friendly flat station designed for use in multi family buildings. It is particularly suitable for two-pipe systems in residential buildings supplied with heat from a central heat source, such as district heating, boilers, solar heating systems, heat pumps, and similar installations.
All pipes are made of stainless steel and connected using Danfoss Hair-pin technology. Compared to traditional stations with threaded connections, this innovative connection method requires no retightening during installation.
The rear panel consists of an EPP insulation plate, complemented by a heat-insulating front cover, ensuring minimal heat loss.
Primary side (DH)
The flat station is equipped with a differential pressure regulator, integrated into the main regulator type TPC M and a central strainer. A thermostatically controlled summer bypass maintains the heat supply at operating temperature, ensuring a rapid domestic hot water (DHW) response outside the heating season.
Heating (HE)
The flat station supplies the radiator circuit with the same temperature as the heat source. The differential pressure regulator ensures efficient heating operation. For time-dependent temperature control, the station can optionally be equipped with an actuator for the zone valve integrated into the regulator.
Domestic hot water (DHW)
Domestic hot water is heated via a heat exchanger using the flow-through principle. Three sizes of heat exchangers are available, covering capacities from 37 to 55 kW.
The domestic hot water temperature is regulated by the self-acting TPC-M regulator (with integrated differential pressure regulator), ensuring a constant DHW temperature even with fluctuating supply temperature, flow, and differential pressure.
If desired, the station can be supplied with built-in DHW circulation.
EvoFlat FSS 110
Application
The EvoFlat FSS 110 is a compact and user‑friendly flat station with a depth of only 110 mm. It can be used for both radiator heating and underfloor heating.
It is particularly suitable for two‑pipe systems in residential buildings supplied via a secondary connected district heating system, a combined heat and power (CHP) system, or a central boiler plant. The EvoFlat FSS 110 is available either as a built‑in version with a Recess box or as a wall‑mounted.
Primary Side
The flat station is pre‑assembled with components such as a differential pressure controller (integrated into the main temperature controller TPC‑M), strainer, and fitting pieces for the installation of a heat meter and water meter.
Radiator heating (HE)
The flat station supplies the radiator heating circuits with the flow temperature provided by the supply. The differential pressure regulator integrated as standard creates optimal operating conditions for the heating.
Floor heating (HE)
With the SGTZ Distribution units installed, the flat station supplies the underfloor heating with a regulated flow temperature, adjustable form 15 °C to 50 °C. The integrated temperature controller create optimal operating conditions.
A bathroom radiator or towel dryer can be connected using an optional high‑temperature connection set.
Domestic hot water (DHW)
The domestic hot water is heated in the heat exchanger according to the flow‑through principle, with the temperature regulated by the automatic controller featuring an integrated differential pressure controller, TPC‑M.
The combined hydraulic and thermostatic control of the TPC‑M ensures maximum user comfort. The flow‑controlled section allows primary and secondary side flow through the heat exchanger only when hot water is being drawn, and stops the flow immediately once the draw‑off is completed.
If necessary, the station can be expanded with a hot water circulation set.
EvoFlat RENO
The EvoFlat Reno is a flat station for direct heating and a pressure and temperature controlled instantaneous domestic hot water heater for two - pipe systems, designed for decentralized heat distribution and is especially suitable for apartment buildings, where existing gas boilers should be replaced. The existing connections for DHW and DCW as well as supply and return of secondary heating circuits can be used without major changes, but it is recommended that the connections for the primary hot water flow and return are to lead through the chimney. Optionally the heating supply and return pipe can also be established in top of the unit.
Primary side
The station is supplied with heating water from a energy source and it is prefabricated with interconnecting components such as a differential pressure controller (integrated in main temperature controller TPC-M), strainer, thermostatic bypass FJVR, sensor pockets and fitting piece for insertion of a heat meter.
Heating (HE)
The self-acting temperature controller TPC-M with integrated differential pressure controller sets the optimum operating conditions for heating and DHW. In order to enable a time dependent temperature control program, a zone valve with actuator and a room thermostat* can be included as an option.
* National laws and guidelines must be observed.
Domestic hot water (DHW)
The domestic hot water is prepared in the heat exchanger based on the flow principle and the temperature is regulated by the self-acting controller with integrated differential pressure controller - the TPC-M. Supreme ease of operation is obtained via the combined hydraulic and thermostatic regulation of the TPC-M controller. The flow - controlled part allows primary and secondary side flow through the heat exchanger, only when hot water is tapped and blocks the flow immediately after completion of the tapping process. The thermostatic part controls the domestic hot water temperature. Thanks to the quick-acting hydraulic control of the heat exchanger, it is largely protected from the formation of lime scale and growth of bacteria. The TPC-M controller with integrated differential pressure controller compensates for variations in supply temperature and varying differential pressure and thereby ensures a constant domestichot water temperature at all times.
Supper bypass
The station is equipped with a summer bypass.
Construction
All pipes are made of stainless steel and insulated.