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Water heater Galmet SGW(S)B Tower Biwal 400 — bi‑valent storage tank, 400 L capacity
Galmet SGW(S)B Tower Biwal 400 is a bi‑valent storage water heater with a 400‑litre tank engineered for integration with central heating systems and auxiliary heat sources. Designed as a domestic hot water accumulator, it stores and supplies hot water reliably for large households or small commercial sites. The unit supports combination use of primary and secondary heat sources to improve system flexibility and efficiency while maintaining a stable domestic hot water supply.
The bi‑valent design allows connection of two heat sources, enabling seamless switching or simultaneous use of a central boiler and an auxiliary heater. A 400 L capacity ensures extended availability of hot water, reducing cycling of heat sources and improving energy management. Constructed for compatibility with standard heating installations, the heater offers straightforward hydraulic integration and steady thermal storage for domestic hot water needs.
Install the Galmet SGW(S)B Tower Biwal 400 in vertical orientation according to local standards and manufacturer installation guidelines. Connect the primary heat source (central heating boiler or similar) to the designated inlet and the auxiliary heater to the secondary inlet. Ensure correct hydraulic balancing, appropriate safety devices, correct expansion vessel sizing and proper temperature controls are fitted. Commission the system by filling, venting, and gradually heating the tank while checking for leaks and correct operation of valves and sensors.
Use thermostatic mixing valves at delivery points to maintain safe tap temperatures and reduce scalding risk. For systems with variable renewable input (solar or heat pump), configure control logic to prioritise auxiliary or primary source according to availability and efficiency. Periodic inspection of anode protection (if applicable), insulation integrity and connections will help maintain performance and prolong service life.
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