Product detailed description
Buderus Set for WB 1 VO WT
Buderus belongs to the Bosch Thermotechnik group and for decades has been synonymous with reliable and energy-efficient heating and hot water technology. German build quality, precise connection dimensions and long-term availability of spare parts and accessories are among the main reasons why Buderus boilers and system components are a popular choice among installers and investors across Europe.
The Set for WB 1 VO WT is genuine Buderus accessory intended for the hydraulic separation of the primary circuit of a wall-mounted condensing boiler (WB series) from the secondary heating circuits. Wall-mounted boilers have a limited output of their built-in circulation pump and limited tolerance to higher hydraulic resistance in more extensive systems — a hydraulic separator or heat exchanger together with its own pump group therefore separate the boiler's flow from the flow in the building's distribution system, enabling reliable operation even with a larger or more complex system.
The designation "WT" comes from the composition of the set — instead of a classic hydraulic separator, it contains a PWT 28 plate heat exchanger (WT = heat exchanger), which ensures both hydraulic and medium separation of the boiler's primary circuit from the secondary circuit. This variant is used where it is necessary to separate the heat transfer medium itself, for example in case of different water quality or a greater distance of the distribution piping.
What's included in the set
- PWT 28 (8718599387), 1 pc
- DNA HS25/6 low (8718599198), 1 pc
- Hydraulic separator sensor 6.0 10K (7735502296), 1 pc
- WMS 1 quick-mount group bracket (67900470), 1 pc
Purpose and number of heating circuits
Based on the composition of its components, the set is designed for connecting one heating circuit (1 VO). The pump group (or the basic and mixing group) ensures circulation and temperature control in the heating circuit, the temperature sensor of the hydraulic separator/heat exchanger provides feedback to the boiler control, and the quick-mount group (WMS) bracket is used to attach the entire assembly to the wall or to the distribution system.
Installation
Connecting the hydraulic separator, pump groups and sensors is professional installation work that fundamentally affects the behaviour of the entire heating system. Installation, electrical connection of the sensors and setting of the control parameters must therefore be carried out by a certified installer or an authorised Buderus service technician, according to the project documentation and installation manual.
Frequently Asked Questions
Why do I need a hydraulic separator or connecting set if I already have a wall-mounted boiler?
Wall-mounted condensing boilers have a limited own flow rate and pressure reserve of the circulation pump. If the heating system is more extensive, has more circuits or a different hydraulic resistance, it is necessary to separate the boiler's primary circuit from the secondary heating circuits — that is exactly what this set is for.
Does the set include the boiler itself?
No, the set is an accessory intended for hydraulic interconnection and circuit separation; the Buderus WB series boiler must be ordered separately.
What is the difference between the sets for 1 and 2 heating circuits?
The set for 1 VO contains one pump group and is intended where it is sufficient to separate one secondary circuit from the boiler. The set for 2 VO contains two pump groups (basic and mixing) and the corresponding double bracket, allowing two separate heating circuits to be connected and independently controlled.
What is the difference between the S variant and the WT variant?
The S variant uses a classic flow-through DN25 hydraulic separator for hydraulic separation. The WT variant contains a plate heat exchanger (PWT 28) instead, which also allows separation of the medium in the primary and secondary circuits, for example in case of different water quality requirements or a greater distance of the distribution piping.
Who should install and connect the set?
Installation, connection of the sensors and setting of the control must be carried out by a certified installer or an authorised Buderus service technician, in accordance with the project documentation and installation manual.
Does the set include a control unit or control module?
The set includes a temperature sensor for the hydraulic separator/heat exchanger, which connects to the boiler's control system or a higher-level controller. The controller itself (e.g. Logamatic) is included with the boiler or purchased separately depending on the specific configuration.
Warranty and service
The components of the set are covered by the standard warranty period provided by the manufacturer Bosch Thermotechnik GmbH / Buderus and by the seller in accordance with the applicable terms and conditions. To claim the full warranty on the boiler and accessories, we recommend having the installation and commissioning carried out by an authorised Buderus service partner and keeping a service log for the appliance. If you have any questions about choosing the right set for your specific boiler type and output, feel free to contact us — we will be happy to advise you.
