Model MAX Flame MIN Flame
Pellet Burner setting Heat Heat Draught CO
2
Burner Heat
feed Output Input Setting Output
Auger TIME TIME kW kW Full Input mbar % TIME kW
angle LOAD PAUSE (Btu/h) (Btu/h) Eff. kg/hr* (in.wg) PAUSE (Btu/h)
MAX MIN
SPIRA 45° 0025 0025 26.3 27.1 97.4 5.70 0.1–0.15 10–12 0140 6.5
6-26 (2.5sec) (2.5sec) (89,735) (92,500) (0.04-0.06) (14.0sec)) (22,100)
SPIRA 45° 0065 0025 36 38.7 93.1 7.78 0.1–0.15 10–12 0250 9
9-36 (6.5sec) (2.5 sec) (122,832) (132,000) (0.04-0.06 (25sec) (30,700)
in.wg)
1. *Heat input is based on a calorific value of 4.81 kWh/kg.
2. Heat input and output data given above is approximate only.
Technical Data
9
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 ENplus A1 (EN14961-2) pellets
MUST be used with the Grant SPIRA
boilers. These pellets must be bark
and sand free AND approved by
Grant UK BEFORE being used in the
Spira boilers. Failure to use approved
pellets will invalidate the product
warranty.
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
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 10-17.
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.
Spira Model
Model Number Units 6-26 9-36
Weight boiler – less burner and fan box (empty) kg 201 231
Weight burner kg 25.5 25.5
Weight fan box kg 5 5
Total weight of boiler (empty) kg 231.5 261.5
Total weight of boiler (full) kg 283 321.5
Weight 110kg pellet hopper (empty) – incl. auger kg 41.35 41.35
Weight 110kg pellet hopper (full) – incl. auger kg 151.35 151.35
Weight 200kg pellet hopper (empty) – incl. auger kg 77 77
Weight 200kg pellet hopper (full) – incl. auger kg 277 277
Weight of auger kg 8.35 8.35
Weight 140kg double pellet hopper (empty)
– incl. 2 augers
kg 42 42
Weight 140kg double pellet hopper (full)
– incl. 2 augers
kg 182 182
To ensure correct combustion, the
burner settings given in the table
above 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 Fg. 10-17.
!
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.
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