Riello Burners RG2 Quick start guide

2903260 (0)
Installation, use and maintenance instructions
Light oil burner
One stage operation
CODE MODEL TYPE
3737754 RG2 377 T1
GB

3260
1GB
INDEX
1. BURNER DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Burner equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. TECHNICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Overall dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.3 Firing rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1 Working position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2 Boiler fixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.3 Hydraulic systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.4 Electrical wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4. BURNER OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.1 Combustion adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.2 Recommended nozzles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.3 Pump pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.4 Electrodes adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.5 Maintenance position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.6 Combustion head adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.7 Air damper adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.8 Operating programme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.8.1 Normal operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.8.2 Lockout due to firing failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.8.3 Lockout due to extraneous light during pre-purging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.8.4 Lockout types and triggering times in case of burner malfunction. . . . . . . . . . . . . . . . . . . . . . . . 12
4.8.5 Control box reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.8.6 Recycle function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.8.7 Logging of burner operation parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.9 Additional, programmable control box functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.9.1 Post-purging function (t6). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.9.2 Continuous purging function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.9.3 Long pre-purging function (t7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.9.4 Function setting procedure using reset button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5. MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1 Control box visual diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6. FAULTS / SOLUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.1 Start-up problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2 Operating irregularities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7. WARNINGS AND SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.1 Burner identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.2 Basic safety measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3260
2GB
1. BURNER DESCRIPTION
One stage light oil burner.
1.1 BURNER EQUIPMENT
Flange with insulating gasket No. 1 Screws and nuts for flange to be fixed to boiler .No. 4
Screw and nuts for flange No. 1 Flexible oil pipes with nipples . . . . . . . . . . . . . .No. 2
Remote reset connection . . . . . . . . . . No. 1
1.2 ACCESSORIES
DIAGNOSTIC SOFTWARE KIT
A special kit is available that detects the life of the burner through optical connections with a PC showing
the duty hours, number and types of lockout, control box serial number etc...
Do the following to display the diagnostic:
³Connect the kit supplied separately to the appropriate socket on the control box.
The information is read after the software program in the kit is booted.
REMOTE RESET KIT
The burner is fitted with a remote reset kit (RS)consisting of a connection to which a button can be con-
nected up to a distance of 20 meters.
For the installation, remove the protection block installed in the factory and install the block that is supplied
with the burner (see wiring diagram on page 6).
1– Oil pump
2– Control-box
3– Reset button with lockout lamp
4– Flange with insulating gasket
5– Air damper adjustment assembly
³Burner with CE marking in conformity with EEC Directives: EMC 89/336/EEC, Low Voltage 73/23/EEC,
Machines 98/37/EEC and Yield 92/42/EEC.
³CE Certification No.: 0036 0344/03 in accordance with 92/42/EEC.
³The burner meets protection level IP X0D (IP 40), as per EN 60529.
³The burner is approved for intermittent operation as per Directive EN 267.
6– Nozzle holder assembly
7– Flame detector
8– Flame tube
9– Motor
Fig. 1
1
2
3
4
8
9
7 56
D4681

3260
3GB
2. TECHNICAL DATA
2.1 TECHNICAL DATA
2.2 OVERALL DIMENSIONS
2.3 FIRING RATE, (as per EN 267)
TYPE 377T1
Output – Thermal power 4 −10kg/h–47−119 kW
Fuel Light oil, viscosity 4 − 6 mm2/s at 20°C
Electrical supply Single phase, ~ 50Hz 230V ±10%
Motor Run current 0.8A – 2750 rpm. – 288 rad/s
Capacitor 4 µF
Ignition transformer Secondary 8 kV – 16 mA
Pump Pressure: 8 −15 bar
Absorbed electrical power 0.18 kW
202 115 189
140
168
10
28
230
280
11
8383
106
45°
45°
D5707
255
ø95
0
3 4 5 Light oil output – kg/h
35 45 55 Thermal power – kW
1.0
0.8
0.6
0.4
0.2
Pressure in combustion
chamber – mbar
D5416
67
65 75
891011
85
1.2
95 105 115 125

3260
4GB
3. INSTALLATION
THE BURNER MUST BE INSTALLED IN CONFORMITY WITH LEGISLATION AND LOCAL STANDARDS.
3.1 WORKING POSITION
The burner is designed to work only in the positions, 1and 2.
Installation 1is preferable, as it is the only one that allows performing maintenance operations as de-
scribed in this manual.
Installations 2allow working operations but not maintenance with hooking to the boiler.
Any other position could compromise the correct working of the appliance.
Installations 3, 4 and 5are forbidden for safety reasons.
3.2 BOILER FIXING
To install the burner on the boiler, do the following:
³Put on the flange (1) the screw and two nuts (see fig. 3).
³Widen, if necessary, the insulating gasket holes (5 fig.).
³Fix the flange (1) to the boiler door (4) using screws (2) and (if necessary) the nuts (3) interposing the
insulating gasket (5), (see fig. 2).
D7088
1 2 3 4 5
Fig. 2
Fig. 3
S7209

3260
5GB
3.3 HYDRAULIC SYSTEMS
ONLY FOR ITALY: Automatic cut-off device as per Ministry of Internal Affairs’ regulation n° 73 dated 7/29/71.
H= difference of level; L= max. length of the suction line; øi= internal diameter.
PRIMING PUMP
On the system in fig. 5 it is sufficient to loosen the suction gauge connection
(5, fig. 4) and wait until oil flows out.
On the systems in fig. 6 and 7 start the burner and wait for the priming.
Should lockout occur prior to the arrival of the fuel, await at least 20 seconds be-
fore repeating the operation.
The pump suction should not exceed a maximum of 0.4 bar (30 cm Hg).
Beyond this limit gas is released from the oil. Oil pipes must be completely tight.
In the vacuum systems (fig. 7) the return line should terminate within the oil tank
at the same level as the suction line. In this case a non-return valve is not
required. Should however the return line arrive over the fuel level, a non-return
valve is required. This solution however is less safe than previous one, due to the
possibility of leakage of the valve.
H
meters
L meters
øi
8 mm
øi
10 mm
0.5
1
1.5
2
10
20
40
60
20
40
80
100
H
meters
L meters
øi
8 mm
øi
10 mm
0
0.5
1
1.5
2
3
3.5
35
30
25
20
15
8
6
100
100
100
90
70
30
20
³The burner is designed to accomodate the installation of
light oil supply pipes on either side of the burner.
³It is necessary to install a filter on the fuel supply line.
³The pump is designed for use with a two-pipe system.
In order to obtain one-pipe working, it is necessary to
unscrew the return plug (2), remove the by-pass screw (3)
and then screw the plug (2) up again, (see fig. 4).
³Before starting the burner make sure that the return pipe-
line is not clogged. An excessive back pressure would
cause the damage of the pump seal.
ATTENTION:
H
max. 4 m
D5710

H
max. 4 m
max. 4 m
H
H
H
D5711
Fig. 6 Fig. 7

1- Suction line
2- Return line
3- By-pass screw
4- Gauge connection
5- Pressure adjuster
6- Vacuometer connection
7- Valve
8- Auxiliary pressure socket
SYSTEM
NOT ALLOWED
IN GERMANY
Fig. 5
1
324
8
76
D5487
5
Fig. 4

3260
6GB
3.4 ELECTRICAL WIRING
WARNING:
³Do not swap neutral and phase over, follow the dia-
gram shown carefully and carry out a good earth con-
nection.
³The cross section of the wires must be at least 1 sq. mm.
(Unless requested otherwise by local standards and legis-
lation).
³The electrical wiring carried out by the installer must com-
ply with the rules in force in the country.
CONTROL BOX, (see fig. 8)
To extract the control box from the burner it is necessary:
³to disconnect all the connectors connected to it, the 7 pin plug, and
the earth wire (TB);
³undo the screw (A) and pull out the control box in the direction of
the arrow.
For the installation of the control box it is necessary:
³to tighten up the screw (A) with a torque of 1 to 1.2 Nm;
³connect all the connectors that were previously connected.
NOTE:
The burners have been approved for intermittent operation.
This means that they must stop once every twenty four hours to permit
the electrical control box to check its efficiency at start up.
Normally the boiler's limit thermostat (TL) ensures the stopping of the
burner. If this is not the case, it is necessary to apply in series with
(TL) a timer switch that turns off the burner at least once every twenty-
four hours.
AE9275
KEY TO LAY-OUT:
C– Capacitor
E– Electrode
F– Flame detector
h1 – Hour counter
MV – Motor
P– Bridge socket
RS – Remote reset
SER – Safety lockout device
S3 – Remote lockout signal
T6A –Fuse
TB – Burner earth
TL – Limit thermostat
TS – Safety thermostat
V1 – Oil valve
V2 – Safety lockout device
X7 – 7 pin plug
XP7 – 7 pole socket
TESTING
³Check the burner has stopped by opening
the thermostats.
³Check the burner's lockout during opera-
tion by interrupting the flame detector.
CONTROL BOX
MO550
D4684
Main switch
230V ~ 50Hz
Fig. 8
TO BE DONE BY
THE INSTALLER
CARRIED-OUT
IN THE FACTORY

3260
7GB
4. BURNER OPERATION
4.1 COMBUSTION ADJUSTMENT
In conformity with Efficiency Directive 92/42/EEC, the application of the burner on the boiler, adjustment and
testing must be carried out by observing the instruction manual of the boiler, including verification of the CO
and CO2concentration in the flue gases, their temperatures and the average temperature of the water in the
boiler. To suit the required appliance output, choose the proper nozzle and adjust the pump pressure, the
setting of the combustion head, and the air damper opening in accordance with the following schedule.
The values shown in the table are measured on a CEN boiler (as per EN 267), and they refer to 12.5% CO2
at sea level and with light oil and room temperature of 20 °C.
4.2 RECOMMENDED NOZZLES
Delavan W - B type; Danfoss S - B type;
Monarch R type; Steinen S - Q type.
For nozzles of 1.75 - 2.00 - 2.25 GPH, it is advisable to use full cones.
4.3 PUMP PRESSURE
It leaves the factory set at 12 bar. To change it act on pump pressure screw (4, fig. 4, page 5).
4.4 ELECTRODE ADJUSTMENT, (see fig. 9)
Nozzle Pump pressure Burner
output
Combustion head
adjustment
Air damper
adjustment
GPH Angle bar kg/h ± 4% Set-point Set-point
1.00 60° 12 4.0 0 0.9
1.10 60° 12 4.4 1 3.1
1.25 60° 12 5.0 2 3.4
1.50 60° 12 6.0 3 3.8
1.75 60° 12 7.0 4 4.5
2.00 60° 12 8.0 5 4.9
2.25 60° 14 9.8 6 6.0
QUALIFIED PERSONNEL WITH THE RIGHT INSTRUMENTS MUST HANDLE THE BURNER'S
START-UP.
!
ATTENTION
MEASURES MUST BE RESPECTED
Lean the diffuser disc-holder assem-
bly (1) on the nozzle-holder (2) and
lock it by screw (3).
For prospective adjustments loosen
screw (4) and move the electrode as-
sembly (5).
To access the electrodes do the follow-
ing described in chapter “4.5 MAINTE-
NANCE POSITION” (page 8).
ATTENTION
4 to 5 mm
4.5 – 0.5 mm
0
123
5
4
D5537
Fig. 9

3260
8GB
4.5 MAINTENANCE POSITION, (fig. 10 and 11)
ACCESSIBILITY TO THE NOZZLE, THE DIFFUSER DISC AND THE ELECTRODES IS MADE EASY IN 2 WAYS:
³Unscrew and remove the fixing nuts to the
flange and remove the burner from the boiler.
³Hook the burner onto flange (1), loosen the
screws (3) and remove the nozzle (2).
³Remove the small cables (4) from the elec-
trodes, loosen the screw (3 fig. 9 page 7) and
remove the diffuser disc-holder assembly (5)
from the nozzle-holder assembly (7).
³Screw up the nozzle (6) holding the nozzle sup-
port with a spanner.
³Refit following the operations in the reverse
order to the one described above.
³Undo the wires (4) from the control box, the
flame detector (8) and undo the nut (9) from the
pump.
³Loosen the screws (10) and extract the nozzle
holder assembly (7) by turning to the right.
³Remove the small cables (4) from the elec-
trodes, loosen the screw (3 fig. 9 page 7) and
remove the diffuser disc-holder assembly (5)
from the nozzle-holder assembly (7).
³Screw up the nozzle (6) holding the nozzle sup-
port with a spanner.
³Refit following the operations in the reverse
order to the one described above.
2
5
4
3
6
1
E9315
Fig. 10
E9316
Fig. 11
TIGHTEN WITHOUT MOVING
BACKWARDS TO THE END
D5684
9
Fig. 12
ATTENTION
During the reassembly of the nozzle-holder assembly
screw the nut (9) as shown in fig. 12.
410
8
95
6
7
7

3260
9GB
4.6 COMBUSTION HEAD ADJUST-
MENT,(see fig. 13)
The adjustment of the combustion head varies
depending on the burner output.
Do the following to adjust it:
³Rotate the setting screw (11) clockwise or coun-
terclockwise until the set-point marked on the
regulating rod (12) is level with the outside plane
of the nozzle-holder assembly (7).
³In the example the regulating rod (12) is set at
notch 3; this means that the burner is regulated
for an output of 6 Kg/h with pump pressure at 12
bar and with the use of a nozzle of 1.50 GPH, as
indicated in the reference table.
4.7 AIR DAMPER ADJUSTMENT,
(see fig. 13)
To regulate the air damper, do the following:
³Loosen the nut (13) and set the air damper by turning the screw (14).
³When burner shuts down the air damper automatically close still a max. chimney depressure of
0.5 mbar.
³When the adjustment is completed do the nut (13) up again.
1411
12
Fig. 13
7
13

3260
10 GB
4.8 OPERATING PROGRAMME
4.8.1 NORMAL OPERATION WITH PREHEATING
KEY TO LAY-OUT
F– Flame detector
I– Ignition transformer
LED – Reset button LED indicating operating
status
MV – Fan motor
TL – Limit thermostat
V1 –Oilvalve
t1 Waiting time of a control box input signal: reaction time,
the control box stands still for the time t1.t4i Transformer turn on time: total turn on time ts +t5i.
t1I Presence of extraneous light before the heat request: if
the presence of light during the t1l time, a block follows. t5i Transformer post- turn on time: additional turn on time after ts.
t2 Wait time after a request for heat:
the control box stays still for the t2 time. t4I Flame loss in operation: maximum oil valve drop reac- tion time, after three recycle attempts a block follows.
t3 Pre-purging time:
start of the fan motor. t6
Post-purging time:
additional purging time on the opening of the heat limit
thermostat (TL)
t3I Presence of an extraneous light during pre-purging:
immediate block. t6I Presence of an extraneous light during post-purging. if the presence of light lasts the t6l time, a block follows.
ts Safety time: if at the end of the ts time there is no flame,
a block follows. t7 Long pre-purging time: pre-purging time more than t3.
OPERATING TIMES
Time is expressed in seconds
t1 max 1 t4i -8
t1I max 30 t5i -3
t2 -3 t4I max 1
t3 -15 t6 max 360
t3I max 1 t6I max 30
ts -5 t7 -120
Red
Green + Yellow slow blinking
Green + Yellow fast blinking
Green
Green + Yellow medium blinking
Red + Yellow fast blinking
Yellow fast blinking
t 2
t 1
t 3
t 4i
t s t 5i
TL
MV
I
V1
F
LED
F
LED
P
M
.
t 4l
D7359
Yellow Yellow
MV = stopped
Yellow Yellow Yellow
Red
Lockout
No signal needs to be received
Green
Green
Loss of flame during operation (Recycle max. 3 attempts)

3260
11 GB
4.8.2 LOCKOUT DUE TO FIRING FAILURE
KEY TO LAY-OUT
F– Flame detector
I– Ignition transformer
LED – Reset button LED indicating operating
status
MV – Fan motor
TL – Limit thermostat
V1 –Oilvalve
4.8.3 LOCKOUT DUE TO EXTRANEOUS LIGHT
DURING PRE-PURGING
OPERATING TIMES
Time is expressed in seconds
t1 max 1 t4i -8
t1I max 30 t5i -3
t2 -3 t4I max 1
t3 -15 t6 max 360
t3I max 1 t6I max 30
ts -5 t7 -120
Red
Green + Yellow slow blinking
Green + Yellow fast blinking
Green
Green + Yellow medium blinking
Red + Yellow fast blinking
Yellow fast blinking
t 2
t 1
t 3
t 4i
t s
TL
MV
I
V1
F
LED
P
M
t 2
t 1
t 3
t s
TL
MV
I
V1
P
M
.
LED
F
t 3l
D7360
Green Red
Green+Yellow
Green Red+Yellow
Lockout
D7361

3260
12 GB
COLOUR CODE OF THE CONTROL BOX RESET BUTTON LED
(*) only for applications provided for.
4.8.4 LOCKOUT TYPES AND TRIGGERING TIMES IN CASE OF BURNER MALFUNCTION
(*) only for applications provided for.
4.8.5 CONTROL BOX RESET
To reset the control box, proceed as follows:
³Press and hold the reset button for between 1 and 2 seconds. If the burner does not restart, you must
make sure the limit thermostat (TL) is closed.
³If the control box reset button continues to blink signalling the cause of the failure (RED LED), it is
necessary to press the button again for no more than two seconds.
4.8.6 RECYCLE FUNCTION
The control box allows a recycle, i.e. complete repetition of the start-up programme, making up to 3 attempts, in
the event the flame goes out during operation.
If the flame goes out again, this will cause the burner to lock out. If there is a new demand for heat during the re-
cycle, the 3 attempts are reset when the limit thermostat (TL) switches.
4.8.7 LOGGING OF BURNER OPERATING PARAMETERS
With this control box, data - i.e. the number of blocks that have occurred, the type of block that has occurred
(just the last one) and the oil valve opening operating time - can be logged even when there is no power supply.
That way, you can determine how much fuel has been consumed during operation.
To display these parameters, it is necessary to connect the software diagnosis kit as described in paragraph
(1.2) page 2.
Operating status LED colour codes Blinking
speed
ON OFF
Seconds
Wait Led unlit
Pre-purging Green
Long pre-purging Green
Transformer turn on Green + Yellow blinking Fast 0.3 0.3
Regular flame Green + Yellow blinking Slow 0.3 2
Post-purging Green + Yellow
Recycle Green + Yellow blinking Medium 2 1
Continuous purging (*)Green
Extraneous light during standby Yellow blinking Fast 0.3 0.3
Extraneous light during post or continuous purging (*)Green + Yellow blinking Fast 0.3 0.3
Extraneous light during lockout Red + Yellow blinking Fast 0.3 0.3
Lockout Red
Lockout with continuous purging (*)Red + Green
DESCRIPTION OF THE FAULT TYPES BLOCK
Extraneous light when the burner is turned on and off After max. 30 seconds
Extraneous light detected during pre-purging Within 1 second
Extraneous light detected during post-purging or continuous purging (*) After max. 30 seconds
Flame goes out during operation After 3 recycles
No flame is detected after safety time Immediate

3260
13 GB
4.9 ADDITIONAL, PROGRAMMABLE CONTROL BOX FUNCTIONS
4.9.1 POST-PURGING FUNCTION (t6)
Post-purging is a function that keeps air purging on even after the burner switches off. The burner switches off
when the limit thermostat (TL) opens, consequently cutting off the fuel supply to the valves. To use this function
the reset button must be pressed when the limit thermostat is not switched over (burner switched off).
Post-purging time can be set to a maximum of 6 minutes, proceeding as follows:
³Press and hold the reset button for at least 5 seconds till the LED indicator changes to red.
³Set the desired time by pressing the button the appropriate times: once = post-purging for 1 minute.
³After 5 seconds the control box automatically shows the minutes set by the red LED blinking: 1 led pulse =
post-purging for 1 minute.
To reset this function, press and hold the button for at least 5 seconds at least, till the LED indicator changes to red
then release it without carrying out any operation, then wait for 20 seconds for the burner to start again.
If during post-purging there is a new request for heat, post-purging time is halted and a new burner operating cy-
cle starts when the limit thermostat (TL) switches.
If during post-purging there is an extraneous light the burner blocks after thirty seconds.
The control box's factory settings are as follows: 0 minutes = no post-purging.
4.9.2 CONTINUOUS PURGING FUNCTION, (only for applications in which this is provided for)
Continuous purging is an operation that maintains the air purging regardless of whether there is a request for the
burner to turn on or not. From the moment it is set, the motor keeps running whether the limit thermostat (TL) has not
been switched (burner off), or when the burner is blocked.
Only when the limit thermostat (TL) is switched does the motor stop for the standby time of four seconds (stand-
by position = t2 + t1).
The function can be set from the reset button when the limit thermostat (TL) is not switched (burner off), by
following the procedure in the post-purging function paragraph 4.9.1 by pressing the button 7 times = con-
tinuous purging.
To reset this function, press and hold the button for at least 5 seconds at least, till the LED indicator changes to red
then release it without carrying out any operation, then wait for 20 seconds for the burner to start again.
If when the limit thermostat (TL) switches, there is an extraneous light the motor stops as long as the extrane-
ous light is there followed by the block.
The control box's factory settings are as follows: 0 minutes = no continuous post-purging.
4.9.3 LONG PRE-PURGING (t7) FUNCTION
The long pre-purging makes it possible too lengthen the purging of the air by the switching of the limit ther-
mostat (TL) on the ignition of the flame for up to two minutes. The function can be set from the reset button
when the limit thermostat (TL) is not switched (burner off), by following the procedure in the post-purging
function paragraph 4.9.1 by pressing the button 8 times = long pre-purging.
To reset this function, press and hold the button for at least 5 seconds at least, till the LED indicator changes to
red then release it without carrying out any operation, then wait for 20 seconds for the burner to start again. The
control box's factory settings are as follows: 0 minutes = no long pre-purging.
4.9.4 FUNCTION SETTING PROCEDURE USING RESET BUTTON
Control box function
CONTROL BOX Action with the reset button Reset button inabled status
Reset 1 to 2 seconds After control box lockout
Visual diagnostics of lockout causes
(5.1) 3 seconds After control box lockout
Post-purging (4.9.1) 5 seconds then press
once = 1 minute
With limit thermostat (TL) not
switched (burner off)
Continuous purging (4.9.2) (only for
applications provided for).
5 seconds then press
7 times = continuous purging
With limit thermostat (TL) not
switched (burner off)
Long pre-purging (4.9.3) 5 seconds then press
8 times = long pre-purging
With limit thermostat (TL) not
switched (burner off)
Resetting set functions 5 seconds With limit thermostat (TL) not
switched (burner off)
Resetting operating parameters 5 seconds With limit thermostat (TL) switched
during pre-purging

3260
14 GB
5. MAINTENANCE
Before carrying out any cleaning or control operation, cut off the electricity supply to the burner using
the system's main switch and close the oil cut off valve.
The burner requires periodic maintenance carried out by a qualified and authorised technician in conformity
with legislation and local standards.
Periodic maintenance is essential for the reliability of the burner, avoiding the excessive consumption of fu-
el and consequent pollution.
THE BASIC CHECKS ARE:
³Check that there are no obstructions or kinks in the supply or return oil pipes, in the air intake regions
and the combustion product discharge tubes.
³Check the proper positioning of the combustion head and its fixing to the boiler.
³Clean the combustion head in the oil outlet area.
³Clean the filter in the oil suction line and in the pump.
³Check that the electrical wiring of the burner have been made properly.
³Clean the flame detector.
³Check the correct oil consumption.
³Check that the combustion head (fig. 13 page 9) and the air damper (fig. 13, page 9) have been regulat-
ed properly.
³Replace the nozzle (fig. 10 and 11, page 8) if necessary and check the correct position of electrodes
(fig. 9, page 7).
³Clean the fan.
Leave the burner working without interruptions for 10 min. and set all the components stated in this manual
properly. Then carry out the analysis of the scale combustion by checking:
- Smoke index as per Bacharach; - CO2 Percentage (%); - CO Content (ppm);
- NOx content (ppm); - Smoke temperature at the chimney.
5.1 VISUAL DIAGNOSTICSCONTROL BOX
The control box features a diagnostics function through which any causes of malfunctioning can be identi-
fied (indicator: RED LED).
To use this function, you must press and hold the reset button for at least 3 seconds once it has entered the
safety condition (lockout).
The control box generates a sequence of led pulses, which is repeated at constant 2-second intervals.
The sequence of led pulses issued by the control box identifies the possible types of malfunction, which are
listed in the table below.
SIGNAL PROBABLE CAUSE
2 pulses
The flame does not stabilise at the end of the safety time:
– flame detector faulty or dirty;
– oil valve faulty or dirty;
– faulty ignition transformer;
– poor burner regulation.
4 pulses
Light present in the chamber before the burner’s switching on or off:
– presence of extraneous light before or after the limit thermostat switching over;
– presence of extraneous light during pre-purging;
– presence of extraneous light during post-purging.
2sPulses Pulses
RED LED illuminated
press reset for 3 sec.
Interval

3260
15 GB
To reset the control box after the diagnostics display, press the lockout-reset button.
6. FAULTS / SOLUTIONS
Here below you can find some causes and the possible solutions for problems that could cause a failure to start
or a bad working of the burner.
A fault usually makes the lockout lamp light which is situated inside the reset button of the control box (3, fig. 1,
page 2).
When lock out lamp lights the burner will attempt to light only after pushing the reset button. After this if the burn-
er functions correctly, the lockout can be attributed to a temporary fault. If however the lock out continues, the
cause must be determined and the remedies shown in the following table adopted.
6.1 START-UP PROBLEMS
SIGNAL PROBABLE CAUSE
7 pulses
Loss of flame during operation:
– poor burner regulation;
– oil valve faulty or dirty;
– flame detector faulty or dirty.
8 pulses
Check and monitor oil heater (if fitted):
– check the correct position of the bridge socket "P".
FAULT POSSIBLE CAUSES SOLUTION
The burner does not
start when the limit
thermostat closes.
Lack of electrical supply.
Check presence of voltage in the
L1 - N clamps of the 7 pin plug.
Check the conditions of the fuses.
Check that safety thermostat is not lock
out.
Bridge socket “P” missing or discon-
nected. Connect it up properly.
The connections in the control box
are wrongly inserted.
Check and connect completely all the
plugs.
The burner goes in
safety lockout
before or during the
pre-purging.
The flame detector sees extraneous
light. Eliminate the light.
Burner runs normal-
ly in the prepurge
and ignition cycle
and locks out after 5
seconds ca.
The flame detector is dirty. Clear it.
The flame detector is faulty. Replace it.
Flame moves away or fails.
Check pressure and output of the fuel.
Check air output.
Change nozzle.
Check the coil of solenoid valve.
ATTENTION

3260
16 GB
6.2 OPERATING IRREGULARITIES
Burner starts with an
ignition delay.
The ignition electrodes are wrongly
positioned.
Adjust them according to the instruc-
tions of this manual.
Air output is too high. Set the air output according to the in-
structions of this manual.
Nozzle dirty or worn. Replace it.
FAULT POSSIBLE CAUSES SOLUTION
Burner locks out
during operation.
Flame disappears four times.
Clean or replace the flame detector.
Replace the dirty or deteriorated nozzle.
Does not shut down.
Check efficiency of flame detector.
Check efficiency pressure regulator’s pis-
ton.
Check efficiency of pump’s on-off valve.
FAULT POSSIBLE CAUSES SOLUTION

3260
17 GB
7. SAFETY WARNINGS
The dimension of the boiler’s combustion chamber must respond to specific values, in order to guarantee a
combustion with the lowest polluting emissions rate.
You are therefore advised to consult the Technical Assistance Department before choosing this type of burn-
er for the combination with a boiler. Qualified personnel are those with the professional and technical re-
quirements indicated by law no. 46 dated March 5, 1990 n° 46.
The commercial organisation has a widespread network of agencies and technical offices whose personnel
participates periodically in instructional and refresher courses at the company training centre.
This burner must only be used for the purposes it has specifically been designed for.
All contractual and other liability on the part of the manufacturer is excluded for injury caused to people, an-
imals or damage caused to property due to faulty installation, calibration, adjustment, maintenance or im-
proper use.
7.1 BURNER IDENTIFICATION
The Identification Plate on the product gives the serial number, model and main technical and performance
data. Tampering with, removal or absence of the Identification Plate will mean it is not possible to identify
the product with certainty and therefore make any installation or maintenance difficult and/or dangerous.
7.2 BASIC SAFETY RULES
³Children or inexpert persons must not use the appliance.
³Under no circumstances must the intake grids, dissipation grids and ventilation vents in the installation
room be covered up with cloths, paper or any other material.
³Unauthorised persons must not attempt to repair the appliance.
³It is dangerous to pull or twist the electric leads.
³Cleaning operations must not be performed if the appliance is not disconnected from the main power supply.
³Do not clean the burner or its parts with inflammable substances (e.g. petrol, alcohol, etc.). The cover
must be cleaned with soapy water.
³Do not place anything on the burner.
³Do not block or reduce the size of the ventilation vents in the installation room.
³Do not leave containers and inflammable products in the installation room.

RIELLO S.p.A.
I-37048 Legnago (VR)
Tel.: [phone]
http:// www.rielloburners.com