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4.10
Burner description
1
Flame stability disk
2
Ignition electrodes
3
Combustion head
4
Gas pressure test point and head fixing screw
5
Screw securing fan to sleeve
6
OIL/GAS selector
7
Relay
8
Slide bars for opening the burner and inspecting the com-
bustion head
9
Control box with lock-out pilot light and lock-out reset button
10 Air gate valve
11 Air inlet to fan
12 Gas input pipework
13 Gas butterfly valve
14 Screw for combustion head adjustment
15 Sleeve with flange for securing the burner to the boiler
16 Max. gas pressure switch
17 Cell UV
18 Servomotor controlling the gas butterfly valve and of air gate
valve (by means of a variable profile cam mechanism).
When the burner is not operating the air gate valve is fully
closed in order to reduce heat dispersion from the boiler due
to the flue draught which draws air from the fan suction inlet.
19 Fan motor
20 Extensions for slide bars 8)
21 Power switch for different operations:
automatic - manual - off
Button for: Power increase - power reduction
22 Motor contactor and thermal relay with reset button
23 Bracket for mounting the power regulator RWF40
24 Terminal strip
25 Fairleads for electrical connections by installer
26 Flame inspection window
27 Minimum air pressure switch (differential operating type)
28 Pump motor
29 Pump
30 Safety solenoid valve
st
nd
31 1
and 2
stage valves
32 Air pressure test point
Two types of burner failure may occur:
Control box lock-out:
if the control box 9)(Fig. 6) pushbutton lights up, it indicates that
the burner is in lock-out. To reset, press the pushbutton.
Motor trip:
release by pressing the pushbutton on thermal relay 22)(Fig. 6).
4.11
Standard equipment
1 - Gas train flange
1 - Flange gasket
4 - Flange fixing screws M 10 x 40 to the butterfly valve
1 - Thermal insulation screen
4 - Screws to secure the burner sleeve with flange to the
boiler: M 16 x 40
2 - Hoses
2 - Nipples for flexible hoses with gasket
2 - Extensions for slide bars 8)(Fig. 6)
(for models with 1551 mm blast tube)
1 - Instruction booklet
1 - Spare parts list
Technical description of the burner
13
GB
In case of use with gas oil containing up to 10%
Bio blend, it will be essential to use flexible oil
lines suitable for bio fuel use.
WARNING
Please contact Riello for further information.
D2955
Fig. 6
20035573
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