Safety
Safety devices in the fuel path
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as well as the requirements of TRVB 118 H. That
provides reliable protection against back burning for
wood chips and pellets.
Fig. 6-12: Single chamber rotary valve
Temperature monitoring system in the fuel store
room
A thermostat must be installed in the wall opening for
the conveyor screw from the wood chip store. It must
trigger the connected warning device, such as a horn,
if a temperature of approx. 70°C is exceeded. The
sensor is inserted into the tube on the conveying
system trough. The activation temperature of the
thermostat is set to 65°C at the factory.
Fig. 6-13: Temperature monitoring system
1
Adjustable thermostat
2
Temperature sensor
Manually activated fire extinguishing system
This safety device floods the fuel store with water in the
event of a fire. This system consists of non-flammable
empty piping with a minimum nominal diameter of 20
mm and must be installed in the fuel store directly
above the conveying system. The empty piping must
be connected to a pressurised water supply and
equipped with a shut-off valve (a ball valve, for
example), and labelled "Fire extinguisher for
storeroom".
Fig. 6-14: Manually activated fire extinguishing system
1
Water supply
2
Empty piping (minimum nominal diameter 20 mm)
in the fuel store
3
Ball valve
Thermally activated sprinkler as automatic extin-
guishing system
The following graphic shows the connection for
the automatic extinguishing system. This extin-
guishing system can be prescribed in certain
countries. It is installed above the rotary valve, so it can
