Tuxhorn » Products » Heating » Flat stations » FSU / FSM
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Flat stations
The thermally controlled tubra®-FSU / FSM flat stations for comfortable, decentralized and hygienic potable hot water heating and efficient heating distribution.
For new construction and renovation with extensive standard equipment. Versions
for radiator systems, underfloor heating and combinations.
All versions with copper or stainless steel brazed plate heat exchanger.
- power classes from 35 kW – 50 kW
- Thermal hot water control
through 3-way priority control valve - standby temperature 50 °C according to VDI 2072
- hot water comfort levels
- and much more
The flat stations are available as unmixed and mixed heating circuits with or without HT connection in various designs.
Unmixed heating circuit:
- tubra®-FSU-S (14 l/min) copper heat exchanger
- tubra®-FSU-S (14 l/min) stainless steel heat exchanger
- tubra®-FSU-M (20 l/min) copper heat exchanger
- tubra®-FSU-M (20 l/min) stainless steel heat exchanger
Mixed heating circuit
- tubra®-FSM-S (14 l/min) copper heat exchanger
- tubra®-FSM-S (14 l/min) stainless steel heat exchanger
- tubra®-FSM-M (20 l/min) copper heat exchanger
- tubra®-FSM-M (20 l/min) stainless steel heat exchanger
Mixed heating circuit with HT connection
- tubra®-FSM HT-S (14 l/min) copper heat exchanger
- tubra®-FSM HT-S (14 l/min) stainless steel heat exchanger
- tubra®-FSM HT-M (20 l/min) copper heat exchanger
- tubra®-FSM HT-M (20 l/min) stainless steel heat exchanger
Performance classes
Mains temperature 60 °C, hot water temperature 45 °C
- FSU/M-S: 14 l/min (35 kW)
- FSU/M-M: 20 l/min (50 kW)
Dimensions
- construction depth 110 mm suitable for drywall
- SM housing narrow: 570 x 700 x 150 mm
- FM housing narrow: 570 x 700 – 900 x 110 – 160 mm
- SM housing wide: 700 x 1160 x 150 mm
- FM housing wide: 700 x 1160 – 1350 x 110 – 160 mm
Thermo Comfort System
- thermal hot water control by 3-way priority control valve
- standby temperature 50 °C according to VDI 2072
- hot water comfort level III according to VDI 6003
Delta Control System
- integrated differential pressure regulator 30 kPa
- presettable zone valve in the heating outlet
Safety Set
- strainer in the station entrance
- water hammer damper
- manual air vent in the flow
Measurement Ready
- fitting for heat meter 110 mm / 3⁄4″
- fitting for cold water meter 110 mm / 3⁄4″
Circulation Set
- connection for hot water circulation pump
- e.g. Lowara Ecocirc 15/1 with intgr. thermostat
- controllable via timer
Mixed Heating System – 10 kW
- connection of mixed heating circuit for floor heating with thermal fixed value control section
- maximum power floor circuit: Q=10 kW, dT=5 K, 1.7 m³/h
- A thermostatic head with remote sensor regulates the volume flow from the mains and
keeps the VL temperature constant at 20 – 50 °C - temperature switch in floor circuit flow max. 55 °C
High Temperature Radiator Option
- additional high-temperature outlet for bathroom radiators with return temperature limitation
Typ | tubra®-FSU-S | tubra®-FSU-M | tubra®-FSM-S | tubra®-FSM-M | |
---|---|---|---|---|---|
Material PWT | Cu / VE | Cu / VE | Cu / VE | Cu / VE | |
WW-Volumenstrom 60/10-45 °C | l/min | 14 | 20 | 14 | 20 |
WW-Leistung | kW | 35 | 50 | 35 | 50 |
Hz-Leistung max. (360 l/h / dT=25 K) | kW | 10 | 10 | 10 | 10 |
Primärvolumenstrom (WW-max.) | l/h | 720 | 1180 | 720 | 1180 |
kvs-Wert Warmwasser | m³/h | 1,2 | 1,7 | 1,2 | 1,7 |
dp-max Warmwasser Volllast | kPa | 37 | 44 | 37 | 44 |
kvs-Wert Heizung | m³/h | 0,7 | 0,7 | 0,7 | 0,7 |
Ausstattungsvarianten | |||||
Differenzdruckregler 30 kPa | Ja | Ja | Ja | Ja | |
therm. Warmwassertemperaturregelung | Ja | Ja | Ja | Ja | |
Warmwasser Vorrangregelung | Ja | Ja | Ja | Ja | |
Heizungs-Zonenventil M30*1,5 | Ja | Ja | Ja | Ja | |
EPP Dämmung Wärmetauscher | Ja | Ja | Ja | Ja | |
PWT Temperatur Vorhaltung | Ja | Ja | Ja | Ja | |
Schmutzfänger, Position WMZ-VL-Sensor | Ja | Ja | Ja | Ja | |
Hand-Entlüfter Primärseite | Ja | Ja | Ja | Ja | |
Wasserschlagdämpfer | Ja | Ja | Ja | Ja | |
Passstück für Wärmemengenzähler Netz | Ja | Ja | Ja | Ja | |
Passstück für Kaltwasserzähler | Ja | Ja | Ja | Ja | |
Anschlussmöglichkeit für WW-Zirkulation | Ja | Ja | Ja | Ja | |
gemischerter Heizkreis 20 - 50 °C | - | - | Ja | Ja | |
Temperaturschalter 55 °C | - | - | Ja | Ja | |
Optionen | |||||
Flies-Dämmung | optional | optional | optional | optional | |
Montageanschlussplatte 7-fach | optional | optional | optional | optional | |
Montageanschlussplatte 9-fach (inkl. HT-Abgang) | - | - | optional | optional | |
Hochtemperatur Abgang für Badheizkörper | - | - | optional | optional | |
Rohrset für Fußbodenverteiler | - | - | optional | optional | |
Set - temperaturgesteuerte Zirkulationspumpe | optional | optional | optional | optional | |
Gehäuse | |||||
AP-Gehäuse schmal: 570 x 700 x 150 mm | optional | optional | - | - | |
UP-Gehäuse schmal: 570 x 700 - 900 x 110 - 160 mm | optional | optional | - | - | |
AP-Gehäuse breit: 700 x 1160 x 150 mm | - | - | optional | optional | |
UP-Gehäuse breit: 700 x 1160 - 1350 x 110 - 160 mm | - | - | optional | optional |
tubra®-Selection of accessories
The thermally controlled tubra®-FSU / FSM home stations for
convenient, decentralized and hygienic DHW heating and
efficient heating distribution.

Flat station with circulation
tubra®-FSU / FSM
DHW flow rate 60/10 – 45 °C with 14 to 20 l/min

Flat station without circulation
tubra®-FSU / FSM
DHW flow rate 60/10 – 45 °C with 14 to 20 l/min

