Storage water heater KOSPEL SWPC-301.PL with 300 L capacity and spiral coil heat exchanger for heat pumps

KOSPEL SWPC-301.PL is a vertical storage water heater with a 300 L capacity and an integrated spiral coil heat exchanger designed for connection to heat pump systems. The cylinder stores domestic hot water while the built-in spiral coil transfers thermal energy from an external heat source such as a heat pump. The design is intended for residential and light-commercial installations that require indirect water heating and buffer storage to stabilise supply and improve system efficiency.

Advantages

The unit combines a large storage volume with a compact vertical footprint, providing substantial hot water reserves without occupying excessive floor space. The spiral coil heat exchanger ensures efficient indirect heat transfer from heat pumps or other low-temperature sources, enabling safe separation between the heating circuit and potable water. Corrosion protection and standard insulation reduce heat losses and extend service intervals, while the straightforward hydraulic connections simplify integration into existing systems.

Suitable for

• Domestic hot water storage in single-family homes and apartment buildings
• Integration with heat pump systems for indirect water heating
• Buffer storage in small commercial or light-industrial installations
• Systems requiring separation between potable water and heating circuits

Key specifications

• Storage capacity: 300 litres
• Cylinder orientation: vertical
• Heat exchanger: internal spiral coil for indirect heating
• Primary connection: designed for heat pump or low-temperature heat source integration
• Intended use: domestic hot water storage and indirect heating
• Insulation: factory-installed thermal insulation to reduce standby losses

How to use

Install the storage water heater in a dry, accessible location with adequate clearance for maintenance and hydraulic connections. Connect the spiral coil to the heat pump circuit using appropriate piping and controls; the potable water supply and draw-off lines must be connected to the designated tank ports. Commissioning should include filling the system, venting air from the coil and tank, checking for leaks, and setting the control parameters of the heat source to match the required supply temperatures. Follow local regulations for potable water installations and ensure all safety devices, such as pressure relief valves and temperature controls, are fitted and operational.

Usage recommendations

For optimal performance with heat pumps, operate the system at moderate flow rates and temperatures recommended by the heat pump manufacturer to maximise coil heat transfer and maintain high seasonal efficiency. Periodic inspection of connections, sacrificial anode (if fitted), insulation integrity, and routine maintenance of the heat source will help sustain reliable operation and prolong lifecycle.