SWEBO Bioenergy
Manual pellet burner PB20
Rev no.
Date
Page
PBM1:12
2018-01-22
11 (36)
4.4 Electric firing device
The electric firing device (firing element) is used to
achieve automatic firing in the firebox.
The firing element’s output is 420W.
4.5 Overheat protection drop pipe
The overheat protection installed on the drop pipe is
used to prevent blowback fires via the fuel feed pipe. In
the event of the overheat protection being deployed,
the current to the burner and auger motor is cut, which
prevents more fuel being fed causing the fire to go out
due to lack of fuel.
Overheat protection is reset manually and alarm input
for overheating is of the safety type and triggers A-
alarm.
4.6 Flame detector
The flame detector is used to detect fire in the burner.
4.7 Extra alarm inputs 1-2
The two extra alarm inputs can be used for optional
external alarm switches. Extra alarm inputs 1-2 are of
the safety type and trigger A-alarm.
Connect extra alarms according to the image below.
4.8 Alarm output A-alarm
The buzzer output is in the form of 2 breaking (NC) relay
switches for A-alarm. The relay switches in the figure
below are shown is non-powered position. Max.
connection to the relay switches is 230 VAC, 2A.
Connect buzzer alarm output A-alarm according to the
image below.
Firing sequence
4.9 Remote panel
Extra external operating panel or other type of device
that can communicate with automatic lighting control
device PB 1. The remote panel displays information on
its front panel in PB 1 but certain other operations can
be carried out from the remote panel. The remote panel
can be installed at a distance of up to 500 metres from
the automatic lighting control device.
The remote panel is connected according to the image
below.
4.10 External temperature sensor
The external temperature sensor is used to provide the
system with information about the current boiler
temperature. The sensor must be installed in the
submerged tube, if applicable.
If
there is no submerged
tube, the sensor can be installed against the boiler inside
the boiler’s insulation. Regardless of whether the sensor is
installed in the submerged tube or not, it must be installed
3/4 of the way up the boiler. Furthermore, the sensor must
be connected to terminals 1 and 2 on the control box
terminal block. See wiring diagram under 3.3.
Содержание PB/20
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