The KWB powerfire is equiped with a fire shutter (and optionally with a
cell wheel sluice). The stocker channel and the hopper are completely
sealed up to the fire shutter. This ensures that backfire is
extinguished due to lack of air. The fire shutter has been tested as a
backfire-protection device (BPD) as specified by TRVB H118 (Fire
The shutter is opened and closed by a servomotor. Fuel conveyance only
starts when the shutter is completely open.
In case of faults or power failure, the shutter closes automatically.
When in operation, the control system prevents
burnback in the stoker chanel by feeding fuel. In addition, a sensor
monitors the temperture in the stocker channel
area.There is a safety temperture limiter(STB), this system shuts down
the heating system if the boiler temperature
should exceed 95°C. So, the fuel conveyor will be switched off,
the fire shutter locks automatically, the fans are
switched off and alarm will be displayed on the boiler control
unit.Also, there is an emergency fire extinguisher
in the stocker screw channel serves as a last instance of protection in
special situations. It consists of a temperature
sensor witch opens a valve at 95°C. The temperature sensor is
mounted on the screw channel in a thermally conductive manner.
Under normal conditions, the valve blocks the hose connection between a
10-litre water canister and the screw channel. If there is backfire,
the channel is flooded and the fire is extinguished. As an additional
safety devive, KWB systems have a float switch installed in the water
canister. The float switch shuts down the system if the water level
drops (under the minimum level). The extinguishing device is a backfire
protection device (BPD), a pyrostat in accordance with TRVB H 118 and
it also functions if there is a power failure. Also, there is a thermal
discharge safety valve as an integrated safety device against
overheating of the boiler. The thermal discharge safety switch is
triggered if the temperture exceeds 95°C.
Trigger factors cloud be sudden shutdown if there is failure of the
boiler pump or there is black-out or there is defect boiler temperature
Also, there is a temperature monitor in the fuel storage whitch sends
of a fault message when a temperature of 70°C is
exceeded and shuts down the boiler. Also, there is a overfill
protection shuts down the system if the conveyor is overfilled whitch
causes the maintenance cover to lift.
KWB Powerfire boiler is among the most compact in the power range from
150 to 300 kW. It is able to work equally well with wood chips pellets
and is ideal for the supply of proximity and large buildings.
- Compact rotating grid system
- Cyclone combustion chamber for a very low emission rate, it is
- 240 liters comfort ashtray
- Removable lower part
- Minimum power consumption
- 10-year total warranty
- High maintenance ease
- Remote maintenance
- Using your mobile phone or laptop, you can interrogate your heating
Various operational states and actively control it remotely.
a silent boiler, no noisy, its a quiltely silent power for a soft life.