Riello Burners RDB1R CF 26, RDB1R CF 38, RDB1R CF 33, RDB1 CF 38, RDB2R CF 38 Installation, Use And Maintenance Instructions

2902661 (3) - 06/2009

Installation, use and maintenance instructions

Light oil burners

One stage operation

CODE MODEL TYPE

3510225 RDB1 CF 38 501 T3
3510050 RDB1R CF 26 501 T1R
3510150 RDB1R CF 33 501 T2R
3510250 RDB1R CF 38 501 T3R
3510650 RDB2R CF 38 502 T3R
3510750 RDB2R CF 46 502 T5R

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CONTENTS

1. BURNER DESCRIPTION

One stage gas oil burner.

1.1 BURNER EQUIPMENT

Flange with insulating gasket. . . . No. 1 Screws for flange to be fixed to boiler. . . . . . . . No. 4

Screw and nuts for flange . . . . . . No. 1 Flexible oil pipes with nipples. . . . . . . . . . . . . . No. 2

1. BURNER DESCRIPTION. . . . . . . . . . . . 1

1.1 Burner equipment . . . . . . . . . . . . . . . . . 1

2. TECHNICAL DATA . . . . . . . . . . . . . . . . 2

2.1 Technical data . . . . . . . . . . . . . . . . . . . . 2

2.2 Working fields . . . . . . . . . . . . . . . . . . . . 2

2.3 Overall dimensions . . . . . . . . . . . . . . . . 3

3. INSTALLATION. . . . . . . . . . . . . . . . . . . 3

3.1 Boiler fixing . . . . . . . . . . . . . . . . . . . . . . 3

3.2 Hydraulic systems . . . . . . . . . . . . . . . . . 4

3.3 Electrical wiring . . . . . . . . . . . . . . . . . . . 5

4. WORKING . . . . . . . . . . . . . . . . . . . . . . . 6

4.1 Combustion adjustment. . . . . . . . . . . . . . 6

4.2 Nozzles recommended . . . . . . . . . . . . . . 6

4.3 Electrodes setting . . . . . . . . . . . . . . . . . . 7

4.4 Pump pressure . . . . . . . . . . . . . . . . . . . . 7

4.5 Air damper adjustment . . . . . . . . . . . . . . 7

4.6 Fuel heating . . . . . . . . . . . . . . . . . . . . . . 7

4.7 Burner start-up cycle . . . . . . . . . . . . . . . . 7

5. MAINTENANCE . . . . . . . . . . . . . . . . . . . 8

6. FAULTS / SOLUTIONS . . . . . . . . . . . . . 9

O

The burner meets protection level of IP 40, EN 60529.

O

Burner w i th CE mark i ng in conf ormity with EEC Di r e ctives: EMC 89/336/EEC - 2004/108/CE, Low V o ltage
73/23/EEC - 2006/95/CE, Machines 98/37/EEC and Efficiency 92/42/EEC.

O

CE Certification No.: 0036 0316/01 as 92/42/EEC.

1 – Pump
2 – Flange with insulating gasket
3 – Air damper adjustment screw
4 – Reset button with lock-out lamp

5 – Photoresistance
6 – Control-box
7 – Pump pressure adjustment screw
8 – Pressure gauge port

1

D4044

Fig. 1

2

3

6

4

7

8

5

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2. TECHNICAL DATA

2.1 TECHNICAL DATA

2.2 WORKING FIELDS (as EN 267)

TYPE 501T3 501T1R 501T2R 501T3R 502T3R 502T5R

Output kg/h 2

– 3.2 1.4 – 2.2 1.8 – 2.8 2 – 3.2 2 – 3.2 2.8 – 3.9

Thermal power kW 23.8 - 37.9 16.6 - 26 21.4 - 33.2 23.8 - 37.9 23.8 - 37.9 33.2 - 46.2

(with air at 20°C) (H

i

= 11.86 kWh/kg)

Fuel Gas oil, viscosity 4 – 6 mm

2

/s at 20°C

Electrical supply Single phase,

~

50Hz 230V ± 10%

Motor Run current 0.7 A – 2850 rpm – 298 rad/s
Capacitor 4.5 µF
Ignition transformer Secondary 8 kV – 16 mA
Pump Pressure: 8

– 15 bar

Absorbed electrical power 0.115 kW 0.170 kW 0.180 kW

0

0.4

Pressure in the combustion

chamber – mbar

Fuel output - kg/h

18 Thermal power - kW

D6270

0.2

0.6

26

0.8

1.0

1.2

16 20 22 24 28

501T1R

501T2R 501T3

1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.21.2

30 32 34 36 38

Pressure in the combustion

chamber – mbar

Fuel output - kg/h

0.4

0.2

0.6

0.8

1.0

1.2

D6271

0

Thermal power - kW2624 28

2 2.2 2.4 2.6 2.8 3 3.2

30 32 34 36 38

3.4 3.6 3.8 4

40 42 44 46

1.4

502T3R 502T5R

1.8

22 48

501T3R

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2.3 OVERALL DIMENSIONS

3. INSTALLATION

THE BURNER MUST BE INSTALLED IN CONFORMITY WITH LEGISLATION AND LOCAL
STANDARDS.

3.1 BOILER FIXING

y Put on the flange (1) the screw and two nuts, (see fig. 2).
y Fix the flange (1) to the boiler door (4) using screws (2) and (if necessary) the nuts (3) interposing the

insulating gasket (5), (see fig. 3).

Flange Burner

140 86

202

130

45

°

223.5

11

168

D4049

180

72 72

150

4

5

°

136

ø 89

D4085

20

5

1

2

4

3

E9149

Fig. 2

Fig. 3

1

E9148

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3.2 HYDRAULIC SYSTEMS

The pump is designed to allow working with two pipes.
In order to obtain one pipe working it is necessary to unscrew the return
plug (2) (fig. 4), remove the by-pass screw (3) and then screw again the
plug (2).

³

In the two pipes systems, before starting the burner make sure that
the return pipe-line is not clogged. An excessive back pressure woul d
cause the damage of the pump seal.

³

A metal bowl filter with replaceable micronic filter must be fitted in the
oil supply pipe.

³

Check periodically the flexible pipes conditions.

PRIMING PUMP
On the system in fig. 5 it is sufficient to loosen the suction gauge

connection (6) (fig. 4) and wait until oil flows out.

The suction plug (1) is made of plastic. Once removed,
it must not be used again.
In single-pipe installations, the plug in the return line (2)
must be totally in steel.

WARNING

7

Fig. 4

6

5

4
3

21

8

D9630

H

max. 4 m

min. 0.1 m

D5741

Fig. 5

H

meters

L meters

I.D.

8 mm

I.D.

10 mm

0.5
1

1.5
2

10
20
40
60

20
40
80

100

On the systems in fig. 6 and 7 start the burner and wait for the priming.
Should lock-out occur prior to the arrival of the fuel, await at least 20 seconds before repeating the operation.

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.

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.

WARNING

1 Suction line
2 Return line
3 By-pass screw
4 Gauge connection
5 Pressure adjuster
6 Suction gauge connection
7Valve
8 Auxiliary pressure test point

D5740

max. 4 m

H

H

max. 4 m

H

H

D1842

Fig. 6

Fig. 7

H

meters

L meters

I.D.

8 mm

I.D.

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

H = difference of level;
L = max. lenght of the suction line;
I.D. = interminal diameter of the oil pipes

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3.3 ELECTRICAL WIRING

NOTES:

y Wires of min. 1 mm

2

section. (Unless requested otherwise by local standards and legislation).

y The electrical wiring carried out by the installer must be in compliance with the rules in force in the Country.

TESTING:

Check the shut-down of the burner by opening the thermostats
and the lock-out by darkening the photoresistance.

Start

White

Black

Neutral

Capacitor

LN

M

~

50Hz - 230V

Oil valve

D6072

CONTROL BOX

Photoresistanc

e

535RSE/LD

Motor

Main switch

T6A

Blue

White

Black

DO NOT EXCHANGE NEUTRAL WITH PHASE

WARNING

Resistance

PE

M

thermostat

Ignition

electrodes

Neutral

Capacitor

LN

M

~

50Hz - 230V

Oil valve

D6041

CONTROL BOX

Photoresistance

535SE/LD

Limit thermostat

Motor

Remote lock-out signal

(230V - 0.5A max.)

Main switch

T6A

Blue

White

Black

PE

Ignition

electrodes

M

CONTROL BOX (see fig. 8)

To remove the control box from the burner follow of the istruction:

y Loosen the screw (1), open the protection (2) and remove all

components.

y Remove the coil (3).
y Loosen the two screws (4).
y Move a little the control box and remove the high voltage leads.

E9150

4

4

3

12

Fig. 8

501T3

501T1R-2R-3R - 502T3R-5R

Safety thermostat Safety thermostat

Limit thermostat

Remote lock-out signal

(230V - 0.5A max.)

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4. WORKING

4.1 COMBUSTION ADJUSTMENT

In conformity with Efficiency Directive 92/42/EEC the application of the burner o n the boiler, adjustment and
testing must be carried out observing the instruction manual of the boiler, including verification of the CO and CO

2

concentration in the flue gases, their temperatures and the average temperature of the water in the boiler.
To suit the required appliance output, fit the proper nozzle, then adjust the pump pressure 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).

They refer to 12.5% CO

2

at sea level and with gas oil and room temperature of 20 °C.

4.2 NOZZLES RECOMMENDED : Delavan type W - E; Monarch type R - NS

Steinen type Q - H ; Danfoss type S - H.

TYPE

Nozzle

Pump

pressure

Burner output Air damper adjustment

GPH Angle bar kg/h

± 4% Set-point

501T3

0.50 60° 12 2.0 3.3

0.55 60° 12 2.2 4.5

0.60 60° 12 2.4 4.8

0.65 60° 12 2.6 5.5

0.75 60° 12 3.0 6.5

0.75 60° 13.5 3.2 7.5

501T1R

0.40 60° 10.5 1.4 0.8

0.50 60° 12 1.9 2.8

0.55 60° 12 2.1 3.8

0.55 60° 13 2.2 5

501T2R

0.50 60° 11 1.8 3.3

0.50 60° 12 1.9 3.5

0.55 60° 12 2.1 4.3

0.60 60° 12 2.3 4.7

0.65 60° 12 2.5 5.2

0.75 60° 11 2.8 6

501T3R

0.55 60° 11 2.0 3.1

0.60 60° 12 2.3 4.1

0.65 60° 12 2.5 4.8

0.75 60° 12 2.9 6.3

0.85 60° 11.5 3.2 7.5

502T3R

0.55 60° 11 2.0 3.4

0.60 60° 12 2.3 4

0.65 60° 12 2.5 4.6

0.75 60° 12 2.9 5.4

0.85 60° 11.5 3.2 6.5

502T5R

0.75 80° 11 2.8 1.5

0.85 60° 12 3.3 2.2

1.00 60° 12 3.8 3.6

1.00 60° 12.5 3.9 3.8

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4.3 ELECTRODES SETTING

4.4 PUMP PRESSURE:

12 bar: The pump leaves the factory set at this value.
14 bar: (Only for type 501T3).

Improves flame retention; it is therefore suitable for ignitions at low temperatures.

4.5 AIR DAMPER ADJUSTMENT

The settings indicated in the schedule are purely indicative. Each installation however, has its own
unpredictable working conditions: actual nozzle output; positive or negative pressure in the combustion­chamber, the need of excess air, etc. All these conditions may require a different air-damper setting.

4.6 FUEL HEATING (fo r t ype 501T1R-2R-3R - 502T3R-5R)

In order to assure regular ignition and working also at low temperatures the burner has an oil pre-heater fitted in
combustion head. The pre-heater starts when thermostats close and it is indicated by the ignition of an orange
led placed on the control box. When the required temperature for ignition is reached the thermostat fitted on the
nozzle holder starts the burner the orange led switches off, the green led switches on and the motor starts. The
pre heater remains energised during working and cuts out when burner shuts-down.

4.7 BURNER START-UP CYCLE

Lock out is indicated by a lamp on the control box (3, fig. 1, page 1)

Before removing or assembling the
nozzle, loosen the screw (A, fig. 9)
and move the electrodes ahead.

ATTENTION

4 ± 0.3 mm

IMPORTANT:
THESE DIMENSIONS
MUST BE OBSERVED

D5230

A

2 – 2.5 mm

Fig. 9

Thermostat

Motor

Ignition transformer

Flame

Lock-out lamp

0 ÷ 150s

D5329

0 ÷ 150s

~

12s

~

12s

~

5s

Resistance

Valve

Thermostat

Motor

Ignition transformer

Oil valve

Flame

Lock-out lamp

~ 12s

D5229

~ 12s

~ 5s

Lock-out due to failure to light

B

Normal

501T3

Lock-out due to failure to light

B

Normal

501T1R-2R-3R - 502T3R-5R

B

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5. MAINTENANCE

The burner requires periodic maintenance carried out by a qualified and authorised technician in conformity
with legislation and local standards.

Maintenance is essential for the reliability of the burner, avoiding the excessive consumption of fuel and
consequent pollution.

Before carrying out any cleaning or control always first switch off the electrical supply to the
burner acting on the main switch of the system.

THE BASIC CHECK ARE:

y Check that there are not obstructions or dents in the supply or return oil pipes.
y Clean the filter in the oil suction line and in the pump.
y Clean the photoresistance, (5, fig. 1, page 1).
y Check for correct fuel consumption.
y Replace the nozzle and check the correct position of electrodes (fig. 9, page 7).
y Clean the combustion head in the fuel exit area, on the diffuser disc.
y Leave the burner working without interruptions for 10 min. and set rightly all the components stated in

this manual. Then carry out a combustion check verifying:



Smoke temperature at the chimney; Content of CO2 (%) ;



Content of CO (ppm);



Smoke value according to opacity smokes index according to Bacharach scale.

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6. FAULTS / SOLUTIONS

Here below you can find some causes and the possible solutions for some problems that could cause a
failure to start or a bad working of the burner.

A fault usually makes the lock-out lamp light which is situated inside the reset button of the control box
(3, fig. 1, page 1).

When lock out lamp lights the burner will attempt to light only after pushing the reset button. After this if the
burner functions correctly, the lock-out can be attributed to a temporary fault.
If however the lock out continues the cause must be determined and the solution found.

WARNING

The manufacturer cannot accept responsibility for any damage to persons, animals or property due to error
in installation or in the burner adjustment, or due to imprope r or unreasonable use or non observance of the
technical instruction enclosed with the burner, or due to the intervention of unqualified personnel.

FAULTS POSSIBLE CAUSES SOLUTION

The burner will not
start when the ad­justment thermostat
closes.

Lack of electrical supply.

Check presence of voltage in the
clamps of the plug.

Check the conditions of the fuses.

Check that thermostat limit is not
lock out.

The photoresistance sees false light. Eliminate the light.

Resistance or start thermostats are
faulty.

Replace them.

The connections in the control box
are wrongly inserted.

Check and connect completely all the
plugs.

Burner runs normal­ly in the prepurge
and ignition cycle
and locks out after 5
seconds ca.

The photoresistance is dirty. Clear it.

The photoresistance is defective. Change it.

Flame moves away or fails.

Check pressure and output of the fuel.

Check air output.

Change nozzle.

Check the coil of solenoid valve.

Burner starts with an
ignition delay.

The ignition electrodes are wrongly
positioned.

Adjust them according to the
instructions of this manual.

Air output is too high. Set the air output.

Nozzle dirty or worn. Replace it.

Subject to modifications

RIELLO S.p.A.
I-37045 Legnago (VR)
Tel.: [phone]
http:// www.rielloburners.com