Grant Spira Series - Page 26

26
2.2 Boiler Input and Output
Data
The settings in the table below are
based on the boiler using the Grant
fixed angle pellet feed auger at 45° with
an auger motor fixed speed of 8.1 rpm.
Only EN Plus Grade A1 (BS EN ISO
17225-2) pellets MUST be used with the
Grant Spira boilers. These pellets must
be bark and sand free AND approved
by Grant BEFORE being used in the
Spira boilers. Failure to use approved
pellets will invalidate the product
guarantee.
2.2.1 Burner settings
All burner settings must be checked as
part of commissioning and servicing.
Refer to Section 9.6 for full details of
the burner settings and how to access,
check and, where necessary, how to
adjust them.
Boiler and Hopper Weights
To ensure correct combustion, the
burner settings given in the table
below must NOT be changed unless
instructed to do so by Grant UK.
!
CAUTION
Do not sample the flue gases
through either the draught stabiliser,
or from within the flue, as they will
have been diluted with air entering
through the draught stabiliser.
Only use the combustion test point
in the top rear access door to check
the CO
2
content of the flue gases.
See Figure 10-16.
!
CAUTION
!
NOTE
Use only a calibrated flue gas
analyser with a ‘Wood Pellet’ fuel
setting. Setting the fuel to anything
other than wood pellets will give an
incorrect reading.
Units 5-18 6-26 9-36
Weight boiler - less burner and fan box (empty) kg 201 201 231
Weight burner kg 25.5 25.5 25.5
Weight fan box kg 5 5 5
Total weight of boiler (empty) kg 232 232 262
Total weight of boiler (full) kg 283 283 322
Weight 110kg pellet hopper (empty) - incl. auger kg 41 41 41
Weight 110kg pellet hopper (full) - incl. auger kg 151 151 151
Weight 200kg pellet hopper (empty) - incl. auger kg 77 77 77
Weight 200kg pellet hopper (full) - incl. auger kg 277 277 277
Weight of auger kg 8 8 8
Weight 140kg double boiler hopper (empty) - incl.
2 augers
kg 42 42 42
Weight 140kg double boiler hopper (full) - incl. 2
augers
kg 182 182 182
Model
Pellet
feed
auger
angle
MAX flame MIN flame
Burner setting Heat
output
Heat
input
Full
eff.
%
Input
kg/
hr*
Draught CO
2
Burner
setting
Heat
output
TIME
LOAD
MAX
TIME
PAUSE
kW
(Btu/h)
kW
(Btu/h)
mbar
(in.wg)
% TIME
PAUSE
MIN
kW
(Btu/h)
5-18 45° 0025
(2.5 sec)
0048
(4.8 sec)
17.8
(60 769)
18.6
(63 500)
95.5 3.87 0.1-0.15
(0.04-0.06)
10-12 0220
(22.0 sec)
5.6
(19 050)
6-26 45° 0025
(2.5 sec)
0025
(2.5 sec)
26.3
(89 735)
27.1
(92 500)
97.4 5.70 0.1-0.15
(0.04-0.06)
10-12 0140
(14.0 sec)
6.5
(22 100)
9-36 45° 0065
(6.5 sec)
0025
(2.5 sec)
36
(122 832)
38.7
(132 000)
93.1 7.78 0.1-0.15
(0.04-0.06)
10-12 0250
(25 sec)
9
(30 700)
Notes
*Heat input is based on a calorific value of 4.81 kWh/kg.
Heat input and output data given above is approximate only.
All burner settings must be checked as part of commissioning and servicing. Refer to Section 9.6 for full details of the burner settings
and how to access, check and, where necessary, how to adjust them.
2.3 Flue Gas Analysis
As part of both the commissioning and
servicing procedures, the CO
2
content
of the flue gases must be checked. To
enable this to be done, the boiler is
supplied with a combustion test point
in the top rear cleaning door. Refer to
Figure 10-16.
To gain access to this test point, first
remove the top casing panel from the
boiler. The test point should be at the
back left corner of the rear cleaning
door. If it is located at the front right
corner of the cleaning door, then
remove the door and refit it with the test
point in the correct position.