Vitotrans 353

Freshwater modules for DHW

The Vitotrans 353 Freshwater module for DHW heating using the instantaneous water heater principle; draw-off rate up to 68 l/min depending on type.

  • Designed for
  • Domestic
    Hot Water
  • Detached &
  • DHW Cylinder
    Not Required
  • Graphic
  • Easy mounting
  • Ready for
  • Made in
  • High draw-off rate enables wide application range: e.g. in larger houses, sports facilities, retirement homes
  • Thanks to the instantaneous water heating principle, fresh DHW is available at all times; no DHW cylinder required
  • Option of cascade installation without additional external control unit
  • 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
  • Designed to support integration with a solar thermal energy system

Key Benefits

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:

The Vitotrans 353 range

Vitotrans 353 series 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.

Convenient, hygienic and futureproof DHW

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 future proof energy saving operation.

A full choice

The 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).

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Product Data


Vitotrans 353

Vitotrans 353

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