70
10.5.1 Pellet Feed Tube Thermostat
When the burner display reads ‘
WAIT
BOILER THERMOSTAT
’ check the
operation of the pellet feed tube (‘burn-
back’) thermostat as follows:
•
Remove the red burner cover by
loosening the four M5 screws (two
on each side of the cover) and
lifting it off the burner.
•
The thermostat is located on the
pellet feed tube. Refer to Figure
10-5.
•
Disconnect the lead from the
thermostat terminals. Refer to
Figure 10-6.
The burner display screen should
automatically go blank, as all power to
the burner has been interrupted.
To make the burner operational again:
•
Re-connect the lead.
•
Refit the burner cover and tighten
the four fixing screws.
10.5.2 Combustion Chamber Door
Switch
When the burner display reads ‘
WAIT
BOILER THERMOSTAT
’ check the
operation of the combustion chamber
door interlock as follows:
•
The interlock is activated by
opening the combustion chamber
door.
•
Fit removable door handle into
slot in door catch. Lift handle to
disengage catch and open the
door.
•
The burner display screen should
automatically go blank, as all
power to the burner has been
interrupted.
To restart the display; close the door
and fully engage the door catch to
re-make the cut-out switch. Refer to
Figure 10-7.
Closing the door will reconnect the
power supply to the burner and the
display will return, confirming that the
door interlock is operating correctly.
Remove handle and keep in a safe
place for future use.
10.6 Burner Settings
The boiler comes with the
burner pre-set from the factory.
However, the burner settings
should be checked as part of
the commissioning process and
recorded on the Commissioning
Report form. Refer to Section 10-12.
With the electrical power to the hopper
and boiler Switched on, and the burner
ON/STANDBY switch set to STANDBY,
check that ALL burner settings in the
‘INSTAL’ (Installer) menu are as given in
Section 9.6.
Refer to Section 9.7 for details of how to
access and check these settings.
Set the boiler temperature set point
using buttons 1 or 2 on the burner
control panel. Refer to Section 1.1 for
required flow and return temperatures.
10.7 Priming the Pellet
Feed Auger
The pellet feed auger MUST be fully
primed BEFORE attempting to start the
boiler.
Prime the auger as follows:
• Disconnect the 6-way plug (No.3),
from the pellet feed auger, from the
upper socket on the left side of the
burner. Refer to Figure 10-8.
• Disconnect the 7-way plug (No.1)
from the socket on the left side of
the burner. Refer to Figure 10-8.
• Disconnect the pellet delivery hose
from the pellet feed tube (on the
burner) and place in a container of
at least 1 litre capacity. Refer to
Figure 10-9.
•
Insert the 6-way plug into the
7-way plug. Refer to Figure 10-10.
It is not possible to connect these
two plugs incorrectly as they will
only fit together one way. The feed
pellet feed auger will now run
continuously until the plug and
socket is disconnected.
Figure 10-6:
Removal of thermostat
lead
Figure 10-7:
Combustion door catch
Figure 10-5:
Location of thermostat
Figure 10-8:
Pellet feed auger plug (3)
Figure 10-9:
Pellet delivery hose
The interlock on the combustion
chamber door interrupts the
power supply to the burner if the
door is opened. IT DOES NOT
IMMEDIATELY EXTINGUISH THE
BURNER FLAME. If the burner
door is opened whilst the burner
is firing, there can still be a large
uncontrolled flame from the brazier.
WARNING
!
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