30
Grant Euroflame Condensing External Modules
7 - COMMISSIONING
Refer to Fig. 17 for boiler controls
Note: Check that the baffles are in position and
that the cleaning cover is correctly fitted and a
good seal made.
IMPORTANT:
Check that the turbulators are in position and that
the ends are vertical (see Fig. 21).
Note: If the 70/90 model is down-rated to 20.7 kW, or
the 90/120 to 25.6 kW, the burner head must be
changed. See Section 3.3 and Sections 9.2 and 9.4.
The Riello RDB 2.2 burner fitted to 50/70 boiler
incorporates a secondary air adjustment shutter located
within the air inlet housing. If the burner is to be
down-rated to the minimum output of 50,000 Btu/h, it
is essential that this internal shutter be correctly
adjusted. To do this proceed as follows:
1. Switch off the boiler and isolate from the electrical
supply.
2. Remove the burner from the boiler.
3. Undo the two screws and remove the air inlet cover
from the side of the burner.
4. The secondary air shutter disc is factory set in position
‘C’ – i.e. with the cut-out marked C located against
the die-cast boss on the fan housing. See Fig 18.
Fig. 17
5. Remove the screw from the centre of the air shutter
disc, and re-position the disc such that the cut-out
‘B’ (see Section 3.3) is located against the cast
boss on the fan housing. Replace the screw in the
centre of the air shutter disc and tighten.
6. Re-fit the air inlet cover to the side of the burner.
7. Change nozzle - Refer to Section 3.3 for correct
nozzle for new output setting.
8. Re-fit the burner to the boiler.
Fig. 18 - 50/70 burner air adjuster disc (shown
set to position 'C')
D
E
F
G
H
L
M
I
Boiler Passport - The Installer is responsible for completing the boiler passport supplied with this boiler and
returning the paperwork to Grant Engineering (IRL) Ltd.. This appliance must be correctly commissioned in
accordance with the appliance instructions and the details returned to Grant Engineering (IRL) Ltd. using the
address shown on the back of this manual.
o
C
Overheat thermostat
reset button
(under screw cover)
Boiler thermostat
‘Lock-out’ reset button
Boiler front
panel removed
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