deutschland en Press Trade press 2011 WTC-OB oil-fired condensing boiler (20 to 35 kW)

WTC-OB oil-fired condensing boiler (20 to 35 kW)

The WTC-OB oil-fired condensing boiler is providing highly efficient, reliable heating in the 20 to 35 kW range.

Trade press

Mar 01, 2011

WTC-OB oil-fired condensing boiler (20 to 35 kW)

The WTC-OB oil-fired condensing boiler is providing highly efficient, reliable heating in the 20 to 35 kW range.

The factory-preset Weishaupt purflam® blue burner is particularly economical in its use of fuel oil, thanks to its two-stage operation. The difference in output between stage 1 and stage 2 is up to 13 kW, depending on the boiler rating, thereby achieving an economical matching of output to current heat demand.

The aluminium heat exchanger has excellent heat transfer properties, which contribute greatly to the energy-efficient operation of the boiler. Flue gas temperatures under all operating conditions are extremely close to the water return temperature. Furthermore, special temperature and deformation-resistant insulation made from rigid EPP foam reduces standby heat losses to a minimum.

Electrical consumption has also been reduced to a minimum, and the electrical components consume less than 4 W when on standby. In addition, the "H" and "W" versions (20 and 25 kW outputs) are equipped as standard with high-efficiency pumps. Version "W" also has a three-way valve for DHW heating. Over a 15-year operating period, compared to a three-stage pump, approximately 4000 kWh are saved. That is the equivalent of the annual electrical consuption of a four-person household.

All relevant emission limits and ordinances are not only met, but considerably undercut. The WTC-OB oil-fired condensing boiler is approved for use with low-sulphur fuel oil (per DIN 51603-1) or a maximum 10 % blend of bio-oil (per DIN 51603-6). The admixture of ash-forming additives is not permitted. The low sulphur content of 50 mg/kg or less protects the environment and extends the service life of the heat-exchange surfaces.

Innovate sensor technology makes a considerable contribution to operational reliabilty and safety, for example by controlling the ignition current. Sensors monitor system and combustion chamber pressure, and if the limit values are exceeded this is shown immediately on the controller display. Another sensor monitors the air inlet temperature so that the air volume can be adjusted accordingly. The boiler's thermal behaviour is analysed in order to optimise burner run times.

Boiler operation is extremely quiet thanks to a combined flue-gas and air-inlet silencer. A special oil filter located within the housing precludes adverse oil odours . It has a sealed air separation system, that provides a controlled feed of the collected air via the burner nozzle into the combustion chamber. Oil consumption is calculated for convenient efficiency control. The current status can be called up on the controller's display.

Careful commissioning by qualified personnel is crucial to the reliable and economical operation of the WTC-OB oil-fired condensing boiler. The controller, with its integrated commissioning assistant, provides usesful help in providing the correct chronological control of the process. It begins with the venting of the hydraulics and the oil lines and concludes with the optimisation of burner stages 1 and 2.

The WTC-OB is easy to transport and install thanks to its compact dimensions and low weight. To help overcome particularly difficult obstacles, such as narrow, steep staircases, there are pipe couplings welded to the boiler frame into which pipe sections can be screwed to serve as carrying handles. The boiler is also suitably protected for transportation by hand truck.

The modular construction behind the WCM controller system with its shared-platform strategy offers benefits both to the end user and to the heating installer. There are specially tailored modules for the widest range of applications, communicating with each other via eBUS to guarantee precisely the right amount of heat and maximum convenience.

 

SystemEnergy efficiency class*
WTC-OB 18-A W-PEA A
WTC-OB 25-A W-PEA A
WTC-OB 30-A H-PEA A
WTC-OB 35-A H-PEA A
WTC-OB 45-A H-PEA A

*Per EU Regulation No. 811/2013 Heating, seasonal space heating energy efficiency class

Weishaupt's WTC-OB oil-fired condensing boiler is available in four ratings from 20 to 35 kW.
Weishaupt's WTC-OB oil-fired condensing boiler is available in four ratings from 20 to 35 kW.
Print-ready image (541.3 KB)
Cut-away drawing of the WTC-OB oil-fired condensing boiler (20 to 35 kW).
Cut-away drawing of the WTC-OB oil-fired condensing boiler (20 to 35 kW).
Print-ready image (848.9 KB)

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