x-buffer® flex
x-buffer flex – layered buffer storage tank. Specifically for use with heat pumps.
The heat storage tank has been specifically developed for use with heat pumps. In conjunction with the integrated inflow dampers, the two temperature levels for hot water and heating ensure optimum temperature stratification and ensure that the generated heat is stored efficiently. Additional connections on both sides allow flexible integration of further heat generators on site.
x-buffer flex
The high-quality, 130 mm thick, 2-layer insulation made of 110 mm EPS and 20 mm fleece reduces storage losses to a minimum. The small tilt and door frame dimensions and the perfectly matched system components make for simple, fast, and error-free installation.
The layered buffer storage tank impresses with its modern design and by allowing flawless installation of the hydro module in a quick and self-explanatory way.
Storage capacity of 620 to 1300 litres
Connections are available for additional heat generators, solar integration, and accessories
Space-saving combined solution for heating and hot water
Clear construction, quick and easy installation
All electrical components are completely prewired
Flexible routing of cables on site
Ideal for operation with heat pumps.
Flexible wall mounting on left or right
All pipes between the storage tank and hydraulic tower that are included with delivery can be installed quickly with flat-sealing connections
Maintenance only from the front
Hydro module
When combined with an x-buffer flex layered buffer storage tank, the hydro module is used to charge the storage tank, to heat domestic water, and to supply the heating surfaces with thermal energy.
Buffer charging assembly
Speed-controlled circulation pump: Wilo Para G 25/8 iPWM 1
2 switching valves
Actuator: ESBE ARA 551, 60 s, 230 V
Flow and return shut-off valves along with integrated gravity brake
Heat pump connection: internal thread R 1 ¼", axial distance 125 mm
Heating circuit
Circulation pump WILO Para G 25/6 SC or WILO Para G 25/9
Mixing valve with actuator ESBE ARA 551, 60 s, 230 V (only with mixed heating circuit)
Heating system connection: internal thread R 1", axial distance 125 mm
Flow and return shut-off valves with integrated thermometer, sensor sleeve (only for mixed heating circuit), and gravity brake
Fresh water station
Electronically controlled hot water generation
Choice of Copper Soldered or Stainless Steel Soldered stainless steel heat exchanger (depending on water quality)
Modbus interface for direct communication with the Kermi x-center pro control
Domestic water circulation (optional)
For increased hot water comfort
Circulation control on request or individual time programs
Storage tank layering set (optional)
To maintain the storage layering in circulation mode
Switching valve type: ESBE SLB 136 24 V
Recommendation: The storage tank layering set is recommended for large systems according to DVGW W 551 and for small systems with greater circulation loads, e.g. old buildings, time control, and so on …
Hydro module pro
x-center pro heat pump control
On the hydro module pro, the x-center pro heat pump control is also integrated into the module with a display. The layered buffer storage tank has been specially designed for use with the x-change dynamic pro heat pump.
Integrated control components incl. contactors for screw-in radiators
High-resolution, capacitive 7" colour touch display
All components prewired at the factory
Guide
heat storage
Not all of the energy generated by the heat pump always gets used immediately. In this case, it makes sense to store the heat generated from renewable energy sources efficiently and with the lowest possible losses. That makes heat storage an important component of any future-oriented heating system.
Whether we are talking about making rooms warm and cosy or providing hygienic domestic water: Heat storage is an important element of all modern heating systems.
Buffer storage systems
Buffer storage tanks keep heat generation and heat consumption completely separate. This means that heat is generated regardless of when it is consumed and your heat pump does not have to start up again every time you turn up a radiator, for example.
Hot water storage systems
Hot water storage tanks ensure that there is always enough hot water available, even if everyone wants a bath.
As with buffer storage tanks, generation and consumption are once again kept separate.
Combined storage tanks
Combined storage tanks incorporate buffer storage and hot water storage in one unit.
The two types of storage are kept strictly separate from one another. Combined storage is the optimal solution if you don’t have much space in the cellar but still want to have an efficient and environmentally friendly storage system.
Installation video
Five-year system warranty
Accessories
x-buffer heat storage tanks
Storing heat with as little loss as possible.
Documents
Customer service
x-change heat pump/x-center control
Quotation and planning service for x-change heat pump/x-center control
Form
BIM
IT data
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