Verswater-buffer BT-400 XL-LE1
Verswater-buffer BT-400 XL-LE1
225 200 1004The Nexus BT-400 XL-LE1 Fresh Water Buffer fresh water buffer is an AISI 304 stainless steel heating buffer with a large AISI 316L hygienic coil for instantaneous domestic hot water production.
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Cost overview
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€ 1.688,17Article
Verswater-buffer BT-400 XL-LE1
Nexus BT-400 XL-LE1 Fresh Water Buffer Stainless Steel Fresh Water Buffer with Hygienic Coil
The Nexus BT XL-LE1 fresh water buffer combines heating buffer function and domestic hot water production in one stainless steel vessel. The tank contains technical heating water, while shower water is produced hygienically through the large AISI 316L stainless steel coil.
Because domestic hot water is heated in flow-through operation, there is no large stored volume of hot drinking water. This hygienic fresh-water principle helps reduce legionella risk and heats only the water that is needed at the tap or shower.
The AISI 304 stainless steel buffer tank increases the water volume of the heating system, improves hydraulic stability and supports smoother heat pump operation. It can also store useful heat in the heating water, for example when heat is produced during low-tariff electricity periods.
The large corrugated hygienic coil provides efficient heat transfer for domestic hot water production, while the buffer connections support heat pump and central heating integration. The frosted-metal white outer casing, PU insulation and 5-year warranty make this a professional solution for installers and HVAC projects.
Key Features
- Buffer tank and domestic hot water producer in one unit
- AISI 304 stainless steel tank for technical heating water
- Large AISI 316L hygienic coil for flow-through DHW
- No large stored volume of hot drinking water
- Helps reduce legionella risk through fresh-water operation
- Improves heat pump stability and system volume
Specifications
Technical data - BT-400 XL-LE1 Fresh Water Buffer
| General | |
| Product type | Stainless steel fresh water buffer with hygienic coil |
| Rated volume | 400 L |
| Application | Heating buffer and instantaneous domestic hot water production |
| Installation type | Vertical floor-standing |
| Connection layout | Top and side connections for heat pump, heating circuit and hygienic coil |
| Number of heat exchangers | 1 |
| Height [mm] | 1800 |
| Tilt height [mm] | 1914 |
| Outer diameter [mm] | 650 |
| Inner diameter [mm] | 550 |
| Insulation | CFC-free rigid PU foam |
| Insulation thickness [mm] | 50 |
| Outer casing | Frosted metal, white |
| Weight [kg] | 80 |
| Warranty | 5 years |
| Tank | |
| Tank material | Stainless steel AISI 304 |
| Max. tank pressure [bar] | 6 |
| Max. tank temperature [deg C] | 95 |
| Heat Exchanger | |
| Exchanger type | Hygienic flow-through corrugated heat exchanger |
| Exchanger design | Ø28 mm corrugated pipe coil |
| Exchanger material | AISI 316L stainless steel |
| Exchanger length [m] | 55 |
| Exchanger surface area [m2] | 7 |
| Exchanger volume [L] | 25 |
| Max. exchanger pressure [bar] | 10 |
| Max. exchanger temperature [deg C] | 95 |
| Connections | ||||
| H | Height | 1800 mm | ||
| ØD | Outer diameter | 650 mm | ||
| Ød | Inner diameter | 550 mm | ||
| H | DN 14 | G 3/4" | P&T safety valve | 1800 mm |
| B | DN 3 | G 1" | Ø28 mm AISI 316L hygienic coil 55 m, 7 m2, 25 L (outlet) | 1565 mm |
| N | DN 23 | G 1 1/4" | Heat pump connection (inlet) | 1465 mm |
| C | DN 5 | G 1/2" | Sensor pocket (1) (12.7 mm) | 1365 mm |
| D | DN 7 | G 1/2" | Sensor pocket (2) (12.7 mm) | 500 mm |
| A | DN 4 | G 1" | Ø28 mm AISI 316L hygienic coil 55 m, 7 m2, 25 L (inlet) | 350 mm |
| L | DN 6 | G 1 1/2" | Electric heating element connection | 250 mm |
| M | DN 24 | G 1 1/4" | Heat pump connection (outlet) | 250 mm |
| F | DN 9 | G 1 1/4" | Heating circuit flow (outlet) | 800 mm |
| E | DN 8 | G 1 1/4" | Heating circuit return (inlet) | 250 mm |
| P | DN 1 | G 3/4" | Drain tap | 85 mm |
| Safety notice |
| The storage vessel must be protected against overpressure at all times. We recommend installing the following safety accessories: - Safety valve and inlet combination - Nexus sanitary expansion vessel - Nexus expansion vessel for heating systems The required expansion vessel capacity must be calculated according to the total system volume and operating conditions. |