Product detailed description
The Buderus brand is part of the Bosch Thermotechnik group and has been one of the leaders in heating and hot water technology in Germany and throughout Europe for decades. The combination of German manufacturing quality, focus on energy efficiency and a wide range of mutually matched components makes Buderus cylinders a proven choice for both new builds and renovations.
Indirectly heated cylinder Buderus Logalux WU120, white
Buderus Set WU120, white is an indirectly heated storage water heater with a capacity of 120 litres, which, thanks to its design (abbreviation "WU" - Warmwasser Umlauf/universal indirectly heated cylinder), represents an alternative to the S120 model, often with a different shape of connections or installation design depending on the specific product line. The cylinder contains one heat exchanger through which heating water from the boiler flows and transfers heat to the domestic water stored in an enamelled tank with a protective magnesium anode.
The Set WU120 is designed as a complete solution ready for installation - in addition to the cylinder, it also includes an expansion vessel and a safety valve, so there is no need to purchase additional safety circuit components.
What's included in the set
The set includes:
- Logalux WU120 W-B (code 8735100645, 1 pc)
- Logafix expansion vessel D12, 10bar, white (code 80432072, 1 pc)
- Logafix AirfixControl (code 7747201056, 1 pc)
- Bracket for expansion vessel MB2 (code 12222017, 1 pc)
The Logafix D12 expansion vessel (10 bar) compensates for volume changes of water during heating, the AirfixControl safety valve with a pressure gauge monitors the system pressure and protects it from excessive increase, and the MB2 mounting bracket ensures safe attachment of the expansion vessel in the installation.
How to choose the right cylinder size
A capacity of 120 litres is suitable for a 2-3 member household with average hot water consumption. For a larger number of household members or higher demands on simultaneous draw-off from multiple points, we recommend considering a cylinder with a larger capacity. The speed of reheating after draw-off depends on the output of the connected boiler.
Frequently Asked Questions
How does the WU120 differ from the S120 model?
Both models have the same capacity of 120 litres and a similar function as an indirectly heated cylinder, but they may differ in the specific construction design or the placement of connections depending on the product line - we recommend checking the exact dimensions and connections in the technical data sheet.
Does the set include a safety circuit?
Yes, the WU120 set includes a Logafix D12 expansion vessel, an AirfixControl safety valve and a mounting bracket.
Is the cylinder compatible with common boilers on the market?
Yes, the heat exchanger is standardised and suitable for connection to most common gas and other heat sources.
What is the recommended frequency of safety valve inspection?
An annual inspection is recommended as part of a regular service check of the heating system.
Is professional installation required?
Yes, the connection of the cylinder and the safety circuit, as well as any inspection of the pressure vessel, must be carried out by a qualified technician.
Can a capacity of 120 litres be considered sufficient for a family house?
For smaller households (2-3 persons), yes. For a larger number of members or higher comfort demands, consider a larger model, such as the S160.
Installation and operation
Installation of the cylinder and its connection to the heating or, where applicable, solar circuit may only be carried out by a qualified person with the relevant authorisation - this involves work on hot water, gas or electrical systems as well as work with pressure vessels, where incorrect installation can jeopardise operational safety and the validity of the warranty. Before installation, we recommend checking that there is sufficient space at the installation site for service access (especially to the heat exchangers, anode and sensors), that the floor can bear the weight of the filled cylinder, and that drainage for any water from the safety valve is ensured.
After connection, the cylinder must be filled, vented and the control technology (sensors, or solar circuit control if applicable) set according to the project documentation and the manufacturer's instructions. Regular service inspection - checking the anode, tightness, pressure in the expansion vessel and the function of the safety valve - extends the service life of the cylinder and reduces the risk of unexpected failure.
Warranty and service
Buderus products are usually covered by a 2-year statutory warranty. When registering the appliance via the official Buderus portal and having it commissioned by an authorised service technician, it is possible to obtain an extended warranty on the cylinder's heat exchanger under standard conditions - we recommend verifying the exact conditions and length of the extended warranty directly upon product registration or with an authorised Buderus service partner. The Buderus service network in Slovakia is extensive, spare parts are readily available, and if the installation and maintenance instructions are followed, you can expect many years of trouble-free operation from the cylinder.
