Vitotrans 353 range

Freshwater modules are used for convenient and hygienic DHW heating according to the instantaneous water heater principle. In contrast to conventional DHW cylinders, the drinking water is not used for storing thermal energy but instead is only heated when required, by means of a powerful plate heat exchanger. The energy for this DHW heating is drawn from a heating water buffer cylinder, which can be heated by a wide range of systems – by solar thermal systems, or by solid fuel boilers, conventional oil/gas boilers, heat pumps or other systems.

The Vitotrans 353 freshwater modules can ensure a constant outlet temperature at the hot water tap despite great differences in draw-off rates. High efficiency circulation pumps of the latest generation are controlled by powerful variable speed controllers, so that the heating water flow rate is always at the optimum level for the current draw-off rate. The Vitotrans 353 thus provides perfect convenience, optimum hygiene and futureproof energy saving operation.

Vitotrans 353 is available in five different types. In the standard version – for wall mounting – there are models PBS (draw-off rate 25 l/min), PBM (draw-off rate 48 l/min) and PBL (draw-off rate 68 l/min).


Take advantage of these benefits

  • High draw-off rate enables wide application range: e.g. in detached and two-family houses, sports facilities, retirement homes
  • Thanks to the instantaneous water heating principle, fresh DHW is available at all times; no DHW cylinder required
  • Pre-assembled module for quick and easy wall mounting – the control unit and HE circulation pump are already fitted and connected
  • The compact design enables easy integration into an existing heating system with heating water buffer cylinder
  • Ideally suited for connection to low temperature heating systems with solar thermal systems, due to the low flow temperature required
  • Control unit with full graphic display and SD card slot for system statements
  • Option of cascade installation without additional external control unit

Hygienic water heating with the continuous-flow heating principle

Fresh water modules are used for delivering comfortable and hygienic water heating using the water heater principle. Unlike the conventional storage water heater, the water is not used for energy storage, but is heated by a powerful plate heat exchanger only when necessary. The energy required for hot water comes from a heating water buffer tank, which can be heated by a variety of systems - through solar systems as well as by solid fuel boilers, conventional oil / gas boilers, heat pumps or other systems.

The Vitotrans 353 can ensure a constant outlet temperature at the hot water tap at different dispensing volumes. The latest highly efficient circulating pumps are speed-controlled by an integrated control so that the heating water volume flow is optimally adjusted to the current tap output.

The Vitotrans 353 offer perfect comfort, optimal hygiene and a future-oriented energy-saving operation.There are five different types.

In the basic version - for wall mounting - the types PBS (tap capacity 25 l / min), PBM (tap capacity 48 l / min) and PBL (tap capacity 68 l / min).


Basic fresh water modules

Basic fresh water modules

The basic version are supplied without a circulation pump and can be retrofitted with a circulation set (accessory) within the thermal insulation. It is also possible to implement a return distribution set (accessory) by means of a 3-way valve installed in the vicinity of the heating water buffer tank. In order to increase the flow rate, there is the possibility to interconnect up to four identical basic modules to form a cascade. No additional control is required since the integrated control systems communicate with each other via a BUS line.


Fresh water modules for storage with Vitocell buffer cylinders

The are two types (draw-off capacity 25 l / min) and (tap capacity 48 l / min) available in this version for storing water in
the Vitocell buffer cylinder. For easy and fast storage assembly, they are supplied  from the factory with the circulation set and the return distribution set. The fresh water modules in this range can be combined with the following Vitocell heating water buffer systems:

Fresh water modules for storage with Vitocell

Product cross-section Vitotrans 353

Product cross-section Vitotrans 353