05/26/2021 Liebherr air conditioning units for the Rhein-Main suburban railway system

The Liebherr air conditioning units are mounted on the roof of the ET 430 suburban railway train. – © Alstom/Daniel Stephan

The Liebherr air conditioning units are mounted on the roof of the ET 430 suburban railway train. – © Alstom/Daniel Stephan

The Liebherr air conditioning units are mounted on the roof of the ET 430 suburban railway train. – © Alstom/Daniel Stephan

Liebherr-Transportation Systems will supply Alstom with further air conditioning equipment for seven suburban railway trains. The first Liebherr air conditioning systems for the ET 430 series were delivered to the rail vehicle manufacturer eleven years ago.

Four air conditioning units for the passenger compartments and two for the driver’s cabin will be installed in each train set. Alstom has ordered a total of 28 roof-mounted air conditioning units for the passenger areas and 14 units for the driver's cabs of the vehicles operated by DB Regio AG, Hesse Region (Germany). The delivery will be made in two parts. In the second quarter of 2021, units for three train sets with be delivered to Hennigsdorf and then, in the first half of 2022, units for four train sets will be delivered to the Alstom plant in Bautzen.

Since the end of 2014, the modern and environmentally-friendly suburban railway trains have been in service on the Rhein-Main rail network on the S1, S7, S8 and S9 lines. They can also be used as replacement vehicles on other routes.

The air conditioning units in the passenger compartment are designed to be particularly energy-efficient, as they use the thermal discharge from traction to heat the passenger areas. Heating using electrical energy can therefore largely be avoided.

The ET 430 series is the evolution of the ET 422 fleet. It is a four-part, electric multiple-unit train and is used by Deutsche Bahn on the suburban networks in various metropolitan areas. Since 1999, more than 700 trains of the ET 422, 423 and 430 series have been fitted with air conditioning systems from Liebherr.