Riello DB 6 LSE C13 Quick start guide

Istruzioni per installazione, uso e manutenzione
Installation, use and maintenance instructions
Instructions d'installation, d'utilisation et d'entretien
Bruciatori industriali policombustibile gasolio/gas
Light Oil/Gas dual fuel industrial burners
Brûleurs industriels polycombustible fioul/gaz
20023874 (2) - 06/2010
DB 6 LSE C13
I
GB
F
Funzionamento modulante
Modulating operation
Fonctionnement modulant

1
General warnings
Informations about the This handbook is a supplement to the burner and must always be kept
handbook with it. It should be read carefully as it supplies important
information for installation, use and maintenance; it should be kept
in a safe place for future consultation.
Who should receive it This handbook has been prepared for people who already have a
working knowledge of all aspects involving oil and gas burners.
These aspects refer to:
- installation;
- use;
- maintenance;
- safety.
Those who receive the handbook should also have qualified and suf-
ficient experience in this sort of appliance and typical working envi-
ronments.
Relative documentation - Gas trains
- Control panel diagram
- Output regulator (modulating)

2
Index
CHAPTER1Introduction . . . . . . . . . . . . . . . . . . . . pagina 3
Selection code descriptions. . . . . . . . . . . . . . . . . . . . . . 3
Specification of the burner type and coding . . . . . . . . . . . . . 3
CHAPTER 2Burner description. . . . . . . . . . . . . . . . . . . . . 4
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Firing rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Burner components . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Overall dimensions – Burner weight . . . . . . . . . . . . . . . . . 6
Air side pressure drop . . . . . . . . . . . . . . . . . . . . . . . . 7
Gas side pressure drop . . . . . . . . . . . . . . . . . . . . . . . . 8
CHAPTER 3Installation. . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation positions . . . . . . . . . . . . . . . . . . . . . . . . . 9
Blast tube length . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Securing the burner to the boiler . . . . . . . . . . . . . . . . . . . 9
Accessibility to the interior of the combustion head . . . . . . . . . 9
CHAPTER 4Fuel supply . . . . . . . . . . . . . . . . . . . . . . . .10
General gas supply layout (example). . . . . . . . . . . . . . . . 10
Choice of nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Pressure variation. . . . . . . . . . . . . . . . . . . . . . . . . . 11
Hydraulic system layout . . . . . . . . . . . . . . . . . . . . . . 12
CHAPTER 5Preparation for start up . . . . . . . . . . . . . . . . . .13
Combustion head adjustment . . . . . . . . . . . . . . . . . . . . 13
Gas train - pilot connection. . . . . . . . . . . . . . . . . . . . . 14
Ignition pilot . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Electrodes positioning . . . . . . . . . . . . . . . . . . . . . . . 15
Control box for the air/fuel ratio (LMV52...) . . . . . . . . . . . 15
Actuator (SQM48.4....) . . . . . . . . . . . . . . . . . . . . . . . 18
Pressure switches setting . . . . . . . . . . . . . . . . . . . . . . 20
Periodic checks . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
CHAPTER 6Maintenance . . . . . . . . . . . . . . . . . . . . . . . .22
Problems and remedies . . . . . . . . . . . . . . . . . . . . . . . 22
CHAPTER 7Wiring diagrams. . . . . . . . . . . . . . . . . . . . . .24

3
1Introduction
1.1 Selection code description 1.2 Specification of the burner type
and coding
DB 6 S TC A-0
supply
A-0 = from below
A-90 = from the right
Combustion head
TC = standard head
Fuel
S= natural gas
P= LPG
Adjustment
E= electronic cam
Size
Series
N= fuel oil
NS = fuel oil / natural gas
NP = fuel oil / LPG
NA = fuel oil assisted atomisation
L= light oil
TL = long head
Combustive air
NAP = fuel oil assisted atomisation / LPG
M= progressive (modulating, mechanical cam)
LS = light oil / natural gas
LP = light oil / LPG
NAS = fuel oil assisted atomisation / natural gas
TXL = special head
A-180 = from above
A-270 = from the left
4 - 6
E
HS = low emissions
TYPE CODE
DB 6 LSE C13 A0 20004685

4
2Burner description
2.1 Technical data
2.2 Firing rate
Model DB 6
Capacity Min./Max. natural gas [kW] 4000 ÷ 7800
Output adjustment Modulating
Combustibile Natural gas (G 20) - Net calorific value 10 kWh/Nm3
Natural gas (G 25) - Net calorific value 8,6 kWh/Nm3
Combustive air temperature Max. 150 °C
Electrical supply 230 V+/-10%50/60 Hz
Ignition Pilot burner
Flame control Standard (1 stop in 24 hours)
Continuous self-check (on request)
Air temperature
kW
7800
66004000
1400
150°C
50°C
0
250°C
DB6
GAS
5850
Air temperature
D8871
Fig. 1

5
CHAPTER 2Burner description
2.3 Burner components
Key
1Air box
2Cover
3Gas delivery regulator
4Control box base for electrical connections
5Boiler attachment flange
6Combustion head
7Gas servomotor
8Air servomotor
9Air pipe attachment flange
10 Flame inspection window
11 Photocell
12 Air pressure switch
13 Maximum gas pressure switch
14 Maximum oil pressure switch on return circuit
15 Pressure gauge nozzle return
16 Pressure gauge nozzle delivery
17 Gauge level (0-90) pressure speed gear
18 Pilot burner
19Burner opening hinge
20 Atomisation nozzle-holder
21 Pilot gas train
Fig. 2
10
11
21
12
7894
11
12 13
14
15
16 17
18
19 20
1
2
5 6
3
D10366

6
CHAPTER 2Burner description
2.4 Overall dimensions – Burner weight
The weight of the burner is shown in table:
Modello kg
DB 6 LSE C13 270
Air duct connection Fixing to the boiler
FLANGE DIMENSIONS
Gas supply
D7549
Fig. 4 Fig. 5 Fig. 6
Fig. 3
D10368
301391
692
355 710
173
1724
428
450
812
659
485
D10367
435
350
350
18
M
DN 80
160
18
D3974

7
CHAPTER 2Burner description
2.5 Air side pressure drop (taken upstream from the completely open air damper)
The pressure curves refer to the different adjustment conditions for the combustion head in accordance to the table on page 14.
Refer to Paragraph 5.1.
In the case of air supply at a higher temperature than 20°C and/or an altitude higher than 100 m. a.s.l., the pressure drop in the
head that is shown in the graph must be multiplied by the Kccoefficient as indicated in the table below.
Example for DB 4
Burnt output = 4000 kW - Altitude = 750 m. a.s.l. - Combustive air temperature = 120 °C
From the diagram, with an output of 4000 kW, a total head pressure drop is shown of: 'p20 = 20 mbar (combustive air at 20 °C
and altitude 100 m. a.s.l.).
The table gives a multiplying coefficient, for combustive air at 120 °C and altitude 750 m. a.s.l., equal to Kc= 1,449.
The total pressure drop of the burner head is:
'p= 'p20 x Kc= 20 x 1,449 = 29 mbar.
Altitude Kc
Air temperature °C
m. a.s.l. 0 20 30 40 50 60 70 80 90 100 120 140 150
0 0,920 0,988 1,021 1,055 1,089 1,122 1,156 1,190 1,223 1,257 1,325 1,392 1,426
100 0,932 1,000 1,034 1,069 1,103 1,137 1,171 1,205 1,239 1,273 1,342 1,410 1,444
500 0,976 1,047 1,083 1,119 1,155 1,190 1,226 1,262 1,298 1,333 1,405 1,477 1,512
750 1,007 1,080 1,117 1,154 1,191 1,228 1,265 1,302 1,338 1,375 1,449 1,523 1,560
1000 1,038 1,114 1,152 1,190 1,228 1,266 1,304 1,342 1,380 1,418 1,494 1,570 1,608
1250 1,069 1,147 1,186 1,226 1,265 1,304 1,343 1,382 1,421 1,460 1,539 1,617 1,656
1500 1,102 1,182 1,223 1,263 1,304 1,344 1,384 1,425 1,465 1,505 1,586 1,667 1,707
1750 1,130 1,213 1,254 1,295 1,337 1,378 1,419 1,461 1,502 1,544 1,626 1,709 1,751
2000 1,174 1,260 1,303 1,346 1,389 1,432 1,475 1,518 1,561 1,604 1,690 1,776 1,819
2250 1,206 1,294 1,338 1,382 1,427 1,471 1,515 1,559 1,603 1,647 1,736 1,824 1,868
2500 1,251 1,343 1,389 1,434 1,480 1,526 1,572 1,618 1,664 1,709 1,801 1,893 1,939
2750 1,284 1,378 1,425 1,472 1,519 1,566 1,613 1,660 1,707 1,754 1,848 1,942 1,989
3000 1,320 1,417 1,465 1,514 1,562 1,610 1,659 1,707 1,755 1,804 1,901 1,997 2,046
0 1000 2000 4000 6000 8000
mbar
K
W
5
10
15
20
25
30
35
40
D8326
Fig. 7
Potenza bruciatore Pb [kW]
'p[mbar]

8
CHAPTER 2Burner description
2.6 Gas side pressure drop
mbar
K
W
0 1000 2000 4000 6000 8000
4
G20
G25
6
8
10
12
14
16
2
18
20
0 1000 2000 4000 6000 8000
mbar
KW
G20
10
20
30
40
50
60
70
80
G25
D8328
D8327
Pb (Burner output) [kW]
Fig. 8
'p[mbar]
Gas pressure on the basis of the
maximum output developed by
the burner is given by the curves
in Fig. 8.
It represents the pressure drop
in the combustion head.
Natural gas G 20 - Net calorific
value = 10 kWh/Nm3
The curves were taken in the fol-
lowing conditions:
• pressure measured at the test
point on the pressure switch
downstream from the gas but-
terfly valve;
• combustion chamber at 0
mbar;
• burner working at full output.
The pressure drop of the com-
pletely open butterfly valve is
given in Fig. 9.
Head pressure drop
Butterfly valve pressure drop
Fig. 9
Pb (Burner output) [kW]
'p[mbar]

9
3Installation
3.1 Installation positions
Horizontal installation
The burner is available in various models to be installed with the air intake from below or above.
3.2 Blast tube length (Fig. 10)
The length of the blast tube must be selected according to the indications provided by the manufacturer of the boiler, and in any
case it must be greater than the thickness of the boiler door complete with its fettling. For boilers with front flue passes 1) or flame
inversion chambers, protective fettling in refractory material 5) must be inserted between the boiler fettling 2) and end cone 4).
This protective fettling must not compromise the extraction of the blast tube. For boilers having a water-cooled front the refractory
fettling 2)-5)(Fig. 10) is not required unless it is expressly requested by the boiler manufacturer.
3.3 Securing the burner to the boiler (Fig. 10)
• Prepare an adequate system of hoisting by
hooking onto the rings 3).
• Slip the thermal protection (standard equip-
ment) onto the blast tube 4).
• Place entire burner on the boiler hole
arranged previously and fasten with the
screws given as standard equipment.
The coupling of the burner-boiler must be
air-tight.
3.4 Accessibility to the interior of the combustion head (Fig. 11) (Optional)
• Switch off the electrical power.
• Unscrew the locknut 6) and release the tie rod 7).
• Remove the 4 fixing screws 1).
• Open burner at hinge (see Fig. 11) (only optional).
• Disconnect the wires of the electrode and the
probe 2).
• Turn the under part of the elbow 3) anticlockwise
until it comes free of its slot.
• Unscrew screw 4) with pressure test point.
• Extract the internal part 5) of the combustion
head.
• With burner closed, the accessibility to the interior
combustion head is possible by removing the
cover 8).
1
1
2
5
3
3
3
4
Fig. 10 D8772
6
71
2
3
4
58
Fig. 11 D8773