71
• Leave the auger running until there
is a continuous flow of pellets from
the pellet delivery hose. This will
take between 15 to 20 minutes.
• Disconnect the two plugs from
each other and the auger will stop.
The pellet feed auger is now fully
primed.
• Refit the pellet delivery hose onto
the pellet feed tube of the burner.
• Check the condition of the pellet
delivery hose and ensure it forms an
air tight seal each end. Check for
damage and replace if necessary.
A damaged pellet delivery hose can
allow a back draught through the boiler
resulting in the pellet tube (burn back)
thermostat operating and shutting down
the burner.
• Finally, re-fit both the 6-way and
then 7-way plugs to their
corresponding sockets on the left
side of the burner. Ensure that both
plugs are fully pushed home until
the small catch clicks into place.
Refer to Figure 10-8.
10.8 Lighting the Boiler
Ensure that the electrical supply to
the hopper and boiler is switched on
connected and that the heating system
controls are operating and are calling
for heat.
Set the burner ON/STANDBY switch to
ON. The flue fan will start and pellets
will be delivered to the burner.
Refer to Section 9.1 for details of the
burner start-up, running and shut down
sequences.
After completing the start-up sequence,
the burner should be firing at maximum
output and the display on the burner
control shows ‘BURNER FIRING 100%’.
10.9 Combustion Chamber
Draught
10.9.1 Draught Measurement
The combustion chamber draught
must be checked and adjusted (where
necessary) as follows:
• Allow the boiler to run for a period
of at least 15 minutes, until the
boiler and flue system are warmed
up.
• Ensure the burner display is
showing ‘BURNER FIRING 100%’.
• Remove the screw from the draught
test point, located to the left of the
burner on the combustion chamber
door. Refer to Figure 10-11.
• After setting the zero on the
draught gauge, insert the end of the
draught gauge sample tube into the
test point on the door. Ensure that it
is pushed through the door
insulation and into the combustion
chamber.
• A draught reading of between 0.1
and 0.15mbar is required (0.04 and
0.06 in.wg).
10.9.2 Draught Stabiliser Adjustment
The combustion chamber draught
should be between of 0.1 to 0.15mbar
(0.04 and 0.06 in.wg) with the boiler
firing at maximum output (i.e. the burner
display is showing ‘
BURNER FIRING
100%
’).
To adjust the combustion chamber
draught reading, slacken the grub
screw re-position the weight on the
stabiliser door arm as follows:
•
To increase draught – move the
weight away from the damper (or
add extra weights if necessary –
see below).
•
To decrease draught –move the
weight closer to the damper. Refer
to Figure 10-12.
If it is necessary to increase the
draught, but the weight fitted is already
at the end of the damper arm, extra
slotted disc weights (supplied with the
boiler) can be used.
These weights are fitted on the ‘flue
end’ of the damper arm, as follows:
•
Slacken the grub screw and slide
the fitted weight along the arm
towards the damper.
•
Fit one of the slotted weights onto
the arm.
•
Secure by inserting a flat bladed
screwdriver into the slot and
twisting it. Refer to Figure 10-12.
•
Slide both the weights to the
end of the shaft and secure by
tightening the grub screw in the
fitted weight. Refer to Figure 10-13.
Repeat this process as necessary to
achieve the required draught.
!
NOTE
If the boiler ON/STANDBY switch is
set to STANDBY during the initial
pellet pre-load period, the pellet
feed will stop. The burner will then
complete the shut-down sequence
before it can start-up again, even if
the ON/STANDBY switch is reset to
ON.
If the ON/STANDBY switch is set
to STANDBY during the start-up
sequence, but AFTER the pre-load
is finished, then the burner will
immediately enter and complete
the shut-down sequence before it
can start-up again, even if the ON/
STANDBY switch is reset to ON.
Ensure the pellet delivery hose
forms an air tight seal each end
and that the hose is not damaged.
Leakage of air could cause
increased temperature in the pellet
delivery hose and result in the pellet
tube thermostat shutting down the
burner.
!
WARNING
Figure 10-11:
Draught test point
Figure 10-10:
Connection of the two
plugs
!
NOTE
Ensure that the grub screw is
tightened to secure the weight(s) to
the shaft after adjusting the draught.
Содержание Spira 5-18
Страница 19: ...19 This page is intentionally left blank...
Страница 95: ...95 13 Spare Parts 13 1 Boiler Figure 13 1 Boiler components exploded view...
Страница 106: ...106 Notes...
Страница 107: ...107 This page is intentionally left blank...
