Product detailed description
Buderus Set for WB 2 VO
Buderus is part of the Bosch Thermotechnik group and has been a synonym for reliable and energy-efficient heating and hot water technology for decades. 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 2 VO is genuine Buderus accessory designed 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 built-in circulation pump output and limited tolerance to the higher hydraulic resistance of a larger system — a hydraulic separator or heat exchanger together with its own pump group therefore separates the boiler's flow from the flow in the building's distribution system and enables reliable operation even with a larger or more complex system.
This variant includes a double hydraulic separator/manifold WHY/HKV 2/25/25, a basic pump group HS25/6 and a mixing pump group HSM25/6, both equipped with the MM100 control module. Thanks to the pair of independent pump groups, two heating circuits with different temperature requirements can be connected and controlled independently, for example a direct radiator circuit and a mixed underfloor heating circuit.
What's included in the set
- DNA WHY/HKV 2/25/25 (8718599383), 1 pc
- DNA HS25/6 INSIDE WITH MM100 (7736601162), 1 pc
- DNA HSM25/6 INSIDE WITH MM100 (7736601166), 1 pc
- Hydraulic separator sensor 6.0 10K (7735502296), 1 pc
- WMS 2 quick-mount groups bracket (67900471), 1 pc
Purpose and number of heating circuits
Based on the composition of the components, the set is designed for connecting two independently controlled heating circuits (2 VO). The pump group (i.e. the basic and mixing group) ensures circulation and temperature control in the heating circuit, the hydraulic separator/exchanger temperature sensor provides feedback to the boiler's control system, and the quick-mount groups mounting bracket (WMS) 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 a professional installation task that fundamentally affects the behavior 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 authorized Buderus service technician according to the project and the installation manual.
Frequently Asked Questions
Why do I need a hydraulic separator or connecting set when I 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 larger, has more circuits or a different hydraulic resistance, it is necessary to separate the boiler's primary circuit from the secondary heating circuits — this is exactly what this set is for.
Does the set include the boiler itself?
No, the set is an accessory intended for hydraulic connection 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 includes one pump group and is intended for cases where it is sufficient to separate a single secondary circuit from the boiler. The set for 2 VO includes two pump groups (basic and mixing) and the corresponding double bracket, allowing two separate heating circuits to be connected and controlled independently.
What is the difference between variant S and variant WT?
Variant S uses a classic flow-through hydraulic separator DN25 for hydraulic separation. Variant WT instead includes a plate heat exchanger (PWT 28), which also allows separating the medium in the primary and secondary circuits, for example in the case of different water quality requirements or a greater distance of the piping.
Who should install and connect the set?
Installation, connection of the sensors and setting of the control system must be carried out by a certified installer or authorized Buderus service technician, in accordance with the project documentation and installation manual.
Does the set include the control system or control module?
The set includes a hydraulic separator/exchanger temperature sensor, which connects to the boiler's control system or a superior 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 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 authorized Buderus service partner and keeping a service log of the equipment. 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 help.
