Set of steel boiler WBS with pre-mounted pellet burner and fuel feeder. Range in nominal output from 20 to 90 kW to satisfy the heating demands of medium to large sized spaces by using the environmentally friendly fuel wood pellets. The WBS Active boiler is adapted for pellet burning, and together with the PELL pellet burner can reach very high efficiency levels.

Product features

• Ready to use set. Includes WBS Active boiler, pellet burner BURNiT PELL, auger with feeder chute and mounting kit
• The boiler is specially adapted for burning pellets with additional elements such as turbulators and upper protective door
• Microprocessor controller that operates:

• Pellet feed and automatic ignition;
• Self-cleaning of the burner;
• Control of the central heating pump (circulation pump);
• Control of domestic hot water pump (DHW pump);
• Control via thermostat;
• Control by buffer tank temperature

• Temperature sensor to monitor the boiler temperature
• Temperature sensor for water heater
• Two temperature sensors for buffer tank
• Pellet burner with built-in:
• Photo sensor for monitoring of flame intensity;
• Internal auger;
• Feeder chute with 360^o rotation
• Dry contactless resistance heater for pellet ignition;
• Air feed fan, step-regulated

Safety devices

For a safe and reliable operation of the boiler, a number of safety devices are installed

• Bent feeder chute to prevent backfire into the fuel hopper
• Thermostatic protection (80^oC)
• Electricity-independent memory of the burner. In case of power interruption, all settings are stored in the pellet burner memory.
• Fuse 10A
• Safety heat evacuator- a tap-water-filled line passes through the upmost part of the boiler body. In case of overheating it is triggered open by a thermostatic valve (not included) to evacuate the heat off the boiler. 
• Pressure relieve valve 3bar

Schematic of the main features of a WBS Active pellet boiler

Legend:

1. Boiler WBS Active
2. Pellet burner Pell, flexible connection, automatic pellet-feeding auger;
3. Pellet fuel hopper FH 500 - (not included)
4. Upper barrier rib / turbulator/
5. Lower barrier rib  /turbulator/
6. Upper protective door ; 
7. Opening of burner flange cover on lower boiler door 
8. Mounting kit - to connect burner Pell to the boiler