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Storage water heater KOSPEL WW-120 with twin coil heat exchanger, domestic hot water tank 120 L
KOSPEL WW-120 is a storage water heater with a twin-coil heat exchanger and a nominal capacity of 120 litres. It is designed to deliver domestic hot water by combining two internal heat-exchange coils that allow connection to separate heat sources, for example a boiler and a solar thermal loop. The tank supports stratified heating for improved efficiency and stable hot water output, making it suitable for residential and light commercial installations that require reliable hot water supply.
The twin-coil arrangement enables simultaneous use of two heat sources, improving flexibility in system design and allowing priority heating from renewable or auxiliary sources. Stratified heating and efficient heat transfer reduce energy consumption by maintaining temperature layers inside the tank. The 120-litre capacity balances storage volume and footprint for homes or small businesses, and the appliance is compatible with common hydronic systems.
Install the storage water heater according to local regulations and the manufacturer's installation instructions, ensuring proper hydraulic connections for primary and secondary heat sources. Connect each coil to its designated heat source—typically one to a boiler and the other to a solar thermal loop or auxiliary heat circuit—using appropriate safety and control devices such as thermostats, expansion vessels and pressure relief valves. Commission the system by filling, venting and heating the tank while checking for leaks and verifying temperature controls and safety devices operate correctly.
For efficient operation, balance heat source priorities with a suitable control strategy (e.g., solar priority when available), perform regular maintenance on heat exchangers and anode protection if present, and follow local water quality guidelines to limit scaling and corrosion. Ensure routine inspection of safety valves and insulation integrity to maintain performance and prolong service life.
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