SCREWLINE⁴-i (WiDHN-KSL1 PL) series is the new water cooled polyvalent heat pump for indoor installation, with R513A refrigerant, and inverter screw compressors.

The WiDHN-KSL1 PL series is the ideal solution to meet the simultaneous needs of hot and chilled water in four-pipe systems (4T configuration).

It is available in Excellence energy version (EXC) which offers high efficiency in all operating modes: SEER up to 7.85 and SCOP up to 4.67, with a capacity range from 440 up to 945 kW.

Further strengths

Eco-friendly solution

The use of R513A refrigerant, with a low GWP (Global Warming Potential = 631), guarantees an environmental impact that is more than halved compared to traditional R-134a refrigerant (GWP = 1430).

Inverter Screw technology

Inverter dual-rotor screw compressors are able to:

• Perfectly match the cooling load of the plant in any condition;
• Follow the load also with a great staging;
• Ensure high efficiency values, reducing operating costs;
• Ensure a null starting current.

Low noise operation

The WiDHN-KSL1 PL series offers 2 acoustic levels:

• Standard acoustic configuration (ST): basic version, value from to 97 to 101 dB(A);
• Super-silenced acoustic configuration (EN): -18 dB (A) compared to ST version, thanks to integral acoustical enclosure.

Maximum adaptability

The capacity modulation from 100% to 20%, the double refrigerant circuit and a hot water production up to +55°C even during the summer season and cold water production up to +4°C, are able to satisfy the requirements of multiple operating conditions. Many options and accessories are available to suit the needs of each plant.

Already complies with 2021 Requirements

The WiDHN-KSL1 PL series complies with the most stringent requirements of the Commission Regulation 2281:2016 in force from January 2021.