Ariterm Biomatic plus 50, Installation, Operation And Maintenance Manual

ARITERM SWEDEN AB

Installation, Operation & Maintenance - 

2009.02.18- 6/32

SAFETY AND ALARMS

The boiler is designed according to the same main principles as an oil heated system. 

The advantage of this pelletsystem is easy and comfortable handling, as the location of 

the fuel store does not depend on the layout of the boiler room. From the safety point 

of view, the separation of fuel store and burner in combination with interrupted fuel 

supply between the two means high security.  

In the event of temperature sensor failure, the high-limit thermostat stops ope-

• 

ration to prevent the boiler from overheating. The burner automatically resumes 

normal operation after power failure or interrupted fuel supply.   
Equipment failure leading to operation stop is indicated by a red LED combined 

• 

with a message on the display panel indicating the cause of the failure.  

In case of fuel shortage, there is also an audible alarm.  
The boiler design is outstanding with safety as an integral part of the function. As 

• 

the fuel supply is interrupted and corrected in the burner auger pipe before the 

boiler wall, there is no continuous fuel line capable of transferring heat outside the 

boiler wall which means that you do not have to rely on extra safety devices.   

For details about the various alarm conditions please refer to ”Troubleshooting”.

Safety is a natural part of the burner function

Each time filling takes place, only a limited amount of pellets (150 g) is transported 

through the external feeding system from the storage bin to the top feed connection. 

To make sure that the correct amount of pellets is supplied from the top feed 

connection to the burn pot, a separate supply auger has been installed immediately 

under the top connection controlling the supply of pellets through the air lock and 

burner auger. As the burner auger is feeding pellets to the burn pot three times a fast 

as they are supplied, a safety zone containing only a few seperated pellets is created 

between the air lock and the burn pot. This safety zone is always kept intact even in 

case of power failure, insucient maintenance or equipment failure. In consequence, 

safety has become an integral part of the burner functionality.

Air lock

Top feed connection

Back �flow

preventer 
plate

Primary air tube

Ignitor tube

Burner auger

Boiler front

Supply 
control
auger

Fan

The feeder screw is to be placed in relation 

to the inlet of the burner such that when 

the tipping chute hangs vertically from the 

screw it opens out outside of the burner.