24
All hoppers are supplied with a
rectangular blanking plate fitted on the
top rear panel. This can be removed, as
required, to allow the fitting of the Grant
SpiraVac pellet feed system. Refer to
installation instructions supplied with
the Grant SpiraVac system for further
details.
This blanking plate has a single round
‘knock-out’ to provide an entry into
the hopper from an auger supplying
pellets from a bulk hopper system.
This knockout is positioned to ensure
the pellets drop into the hopper and
operate the hopper contents switch.
Only this opening MUST be used
as making another opening in the
intermediate hopper could affect the
operation of the contents switch.
Electrical connection for either a bulk
auger or Grant SpiraVac system, if
required, is made using the 6-way
electrical plug and flying lead supplied
factory-fitted at the rear of the hopper.
Refer to Section 8 for connection
details.
Always ensure that the door and top
panel of the boiler hopper are fitted
to ensure no foreign debris enters the
hopper. If a bulk system with an auger
is fitted, ensure that the bulk auger
does not impede the opening of the
hopper door.
1.4.5 Pellet Feed Auger.
All Grant
hoppers are supplied with either one
or, on double boiler hoppers, two
1.2m pellet feed augers. These are set
at a fixed angle of 45° to maintain a
consistent feed. If the pellet feed auger
angle is altered the input to the boiler
will also be altered.
The pellet feed auger is a hollow spiral
type. Its function is to deliver the pellets
from the hopper to the burner. The
output of the boiler is determined by
varying the on/off periods of the pellet
feed auger motor. Refer to Section 3.2
for pellet feed data.
1.5 Boiler Cleaning and
Servicing
Grant Spira condensing wood pellet
boilers are equipped with an automatic
cleaning system for each of the two
heat exchangers and also for the burner
brazier.
Care must be taken to avoid contact
with hot surfaces.
Always wait for the boiler to
cool down before opening the
combustion chamber door and
removing the ash pan.
The boiler MUST be serviced either
ANNUALLY or when a service is
indicated on the burner control
panel display, whichever comes
first. Servicing should only be
carried out by a Grant UK trained
Installer and details of each
service should be recorded in the
Service Log in the back of the user
instructions.
!
WARNING
The ash pan (located inside the
combustion chamber) will need to
be periodically emptied. This simple
task must be carried out by the
user at MONTHLY intervals for the
FIRST THREE MONTHS. Thereafter,
the ash pan should be emptied
regularly, on at least a monthly
basis, or as indicated by the amount
of ash found during the first three
months. Two carrying handles are
supplied with the boiler to allow
removal of the ash pan when hot.
Refer to Figure 1-3
Figure 1-3:
Removable carry handles
!
CAUTION
The amount of ash produced varies
between the different pellet brands
and this will affect the frequency of
cleaning and maintenance required.
!
NOTE
1.6 Removable Door Catch
Handle
All Grant Spira boilers are supplied with
a removable handle for the combustion
chamber door catch. This must be
removed when the door is shut. Refer to
Figure 1-4.
To open the combustion chamber
door:
•
Fit the removable door handle into
the slot in the door catch.
•
Lift handle to disengage the catch
and open the door.
When closing the combustion
chamber door:
•
Fully engage the door catch to
remake the door cut-out switch.
•
Remove the handle and keep in a
safe place for future use.
Figure 1-4:
Removable door catch
handle
