Riello Burners RLS 300/E MX User manual

TS0070UK01
RLS/E-EV MX SERIES
RLS 300/E MX 600/1250 ÷3550 kW
RLS 400/E MX 800/1800 ÷4300 kW
RLS 300/EV MX 600/1250 ÷3550 kW
RLS 400/EV MX 800/1800 ÷4300 kW
RLS/E-EV MX series burners are characterised by a modular monoblock structure that
means all necessary components can be combined in a single unit thus making installation
easier, faster and, above all, more flexible.
The series covers a firing range from 600 to 4300 kW, and they have been designed for
use in hot water boilers, overheated water boilers as well as steamboilers. Operation can
be “two stage progressive” or alternative “modulating” with the installation of a PID logic
regulator. The burner can, therefore, supply with precision the demanded power, guaranteeing
an high efficiency system level and the stability setting, obtaining fuel consumption and
operating costs reduction.
The innovative combustion head, adjustment system ensures perfect movement during
modulation as well as reducing noise and pollutants.
LOW NOx DUAL FUEL BURNERS

TECHNICAL DATA
Approval Fuel / air dataElectrical data
Emissions
600/1250÷3550 800/1800÷4300 600/1250÷3550 800/1800÷4300
516/1075÷3053 688/1548÷3698 516/1075÷3053 688/1548÷3698
50/105÷299 67/151÷362 50/105÷299 67/151÷362
60/125-355 80/180÷430 60/125-355 80/180÷430
70/145-412 93/209÷500 70/145-412 93/209÷500
included in LMV51 included in LMV51 included in LMV52 included in LMV52
6,5 9,5 6,5 9,5
4,5 7,5 4,5 7,5
9,1-15,8 17,5 - 30 9,1-15,8 17,5 - 30
51-86 113 - 195 51-86 113 - 195
83 85 83 85
CE in progress CE in progress -- --
two stages progressive/modulating
1 ÷4
SQM 48 (OIL and GAS)
0/60
11,86
0,82
4-6
TA4
870 (20 bar)
25
50
NO
10
0,71
8,6
0,78
--
--
--
reverse blade fan wheels
60
3/50/400 (±10%)
1/50/430 (±10%)
2
--
54
1,5
3,7
7xIn
54
54
N.A.
230 V - 2 x 5 kW
1,9 A - 35 mA
Intermittent (at least 1 stop every 24 h) or Continuous (at least 1 stop every 72 h)
N.A.
< 10
< 2
< 2
< 185
< 10
< 80
90/396 - 89/336 - 73/23 EEC
EN 267 - EN 676
Since the Company is constantly engaged in the production improvement, the aesthetic and dimensional features,
the technical data, the equipment and the accessories can be changed.
This document contains confidential and proprietary information of RIELLO S.p.A. Unless authorised, this information
shall not be divulged, nor duplicated in whole or in part.
Reference conditions: Temperature: 20°C - Pressure: 1000 mbar - Altitude: 100 m a.s.l. - Noise measured at a distance of 1 meter.
RLS 400/E MXRLS 300/E MX RLS 400/EV MXRLS 300/EV MX
2
type
s
kW
Mcal/h
°C min./max.
kWh/kg
kg/l
mm2/s (cSt)
kg/h
type
kg/h
bar
max. °C
kWh/Nm3
kg/Nm3
Nm3/h
kWh/Nm3
kg/Nm3
Nm3/h
kWh/Nm3
kg/Nm3
Nm3/h
type
max °C
Ph/Hz/V
Ph/Hz/V
type
kW
kW
kW
IP
kW
A
A
IP
kW
A
A
IP
type
V1 - V2
I1 - I2
dB (A)
W
mg/kWh
N°Bacharach
mg/kWh
mg/kWh
mg/kWh
mg/kWh
Model
Burner operation mode
Modulation ratio at max. output
Servomotor
run time
Heat output
Working temperature
net calorific value
Light Oil density
viscosity at 20°C
delivery
Pump delivery
Atomised pressure
Fuel temperature
Fuel pre-heater
net calorific value
G20 density
gas delivery
net calorific value
G25 density
gas delivery
net calorific value
LPG density
gas delivery
Fan
Air temperature
Electrical supply
Auxiliary electrical supply
Control box
Total electrical power
Auxiliary electrical power
Heaters electrical power
Protection level
Pump motor electrical power
Rated pump motor current
Pump motor start up current
Pump motor protection level
Fan motor electrical power
Rated fan motor current
Fan motor start up current
Fan motor protection level
Ignition transformer
Working
Sound pressure
Sound power
CO emission
Light Oil grade of smoke indicator
CxHy emission
NOx emission
G20 CO emission
NOx emission
Directive
Conforming to
Certification

FIRING RATES
Test conditions conforming to EN 676:
Temperature: 20°C
Pressure: 1000 mbar
Altitude: 100 m a.s.l.
0
4
8
12
10
6
2
14
18
16
0
0
40
80
120
100
60
20
140
180
160
RLS 300/ E-EV MX RLS 400/
E-EV MX
hPa (mbar) mm H
2
O
3
Mcal/h
15001000500 2000 2500 3000 3500 4000 4500
kW
500 1000
0
1500 2000 2500 3000 3500 4000 4500 5000
1 9
1 9 0
Useful working field for choosing the burner
Modulation range

The burners are fitted with a butterfly valve to regulate the fuel, controlled by the main management
module of burner through a high precision
servomotor.
Fuel can be supplied either from the right or
left sides, on the basis of the application
requirements.
A maximum gas pressure switch stops the
burner in case of excess pressure in the fuel
line.
The gas train can be selected to best fit system
requirements depending on the fuel output and
pressure in the supply line.
The gas trains are “Multibloc” and “Composed”
type (assembly of the single components)
without seal control. This function is included
in the burner management module.
GAS TRAIN
FUEL SUPPLY
Gas input pipework
Manual valve
Anti-vibration joint
Pressure gauge with pushbutton cock
Filter
Pressure regulator (vertical)
Minimum gas pressure switch
VS safety solenoid (vertical)
VR regulation solenoid (vertical)
Two settings: - firing output (rapid opening)
- maximum output (slow opening)
Gasket and flange supplied with the burner
Gas adjustment butterfly valve
Burner
Gas train-burner adapter
Maximum gas pressure switch
Combustion head pressure
Pressure downstream from the regulator
Pressure upstream from the filter
Gas train supplied separately, with the code given in the table
Installer’s responsibility
1
2
3
4
5
6
7
8
9
10
11
12
14
15
P1
P2
P3
L
L1
MULTIBLOC gas train type MBC 1200
COMPOSED gas train type MBC 1900-3100-5000
LL1
Example of the RLS/E MX gas adjustment butterfly valve.
12
12
4
P1
15 11
10
14 6
LL1
98
7
5
4
P3
P2
321
P1
15 11
10
14 968
7
5
4
P3
P2
321

COMPOSED
GAS TRAINS
MULTIBLOC
GAS TRAINS
Y
ZX
Øo
Y
ZX
Øi
Øo
Name
MBC 1200 SE 50
MBC 1900 SE 65 FC
MBC 3100 SE 80 FC
MBC 5000 SE 100 FC
Code
3970221
3970222
3970223
3970224
Ø i
2”
DN 65
DN 80
DN 100
X mm
573
583
633
733
Y mm
161
237
240
350
Z mm
425
430
500
576
Ø o
2”
DN 65
DN 80
DN 100
Example of gas train
“COMPOSED” type
without seal control
Example of gas train
“MULTIBLOC” type
without seal control
Øi
Gas trains are approved by standard EN 676 together with the burner.
The overall dimensions of the gas train depends on how they are constructed. The following table
shows the maximum dimensions of the gas trains that can be fitted to RLS 300-400/E-EV MX burners,
intake and outlet diameters.
The maximum gas pressure of gas train “Multibloc” type is 360 mbar, and that one of gas train
“Composed” type is 500 mbar.
MULTIBLOC guarantees a range of pressure towards the burner from 3 to 60 mbar. For version DN
65 and DN 80 is from 20 to 40 mbar. The range of pressure in the MULTIBLOC with flange can be
modified choosing the stabiliser spring (see gas train accessory).
5

PRESSURE DROP DIAGRAM
RLS 300/E-EV MX
RLS 400/E-EV MX
The diagrams indicate the minimum pressure drop of the burners with the various gas trains that
can be matched with them; at the value of these pressure drop add the combustion chamber pressure.
The value thus calculated represents the minimum required input pressure to the gas train.
NATURAL GAS
note
Please contact the Riello Burner Technical Office for different pressure levels from those above
indicated and refer to the technical manual for the correct choice of the spring.
MBC 1200 gas train: the minimum operating pressure (*) is higher or equal to 10 mbar.
The gas train has to be installed next to the burner (if needed, only with the adapters listed in
the catalogue) and it has to operate in its own working field.
MBC 1900-3100-5000 gas train: the minimum operating pressure (*) is higher or equal to
15 mbar. The gas train has to be installed next to the burner (if needed, with the adapters listed
in the catalogue) and it has to operate in its own working field.
(*) it is the upstream gas train pressure in full load operation conditions.
Gas train
MBC 1200 SE 50
MBC 1900 SE 65 FC
MBC 3100 SE 80 FC
MBC 5000 SE 100 FC
Code
3970221
3970222
3970223
3970224
Adapter
3000826 ( I )
3010221 ( I )
3010222 ( I )
3970223 ( I )
Seal Control
(*)
(*)
(*)
(*)
Gas train
MBC 1200 SE 50
MBC 1900 SE 65 FC
MBC 3100 SE 80 FC
MBC 5000 SE 100 FC
Code
3970221
3970222
3970223
3970224
Adapter
3000826 ( I )
3010221 ( I )
3010222 ( I )
3970223 ( I )
Seal Control
(*)
(*)
(*)
(*)
(*) The seal control is managed by the control box LMV51/LMV52.
(*) The seal control is managed by the control box LMV51/LMV52.
mbar
Δ P
Combustion head and gas train Combustion head
Pressure drop
mbar
Δ P
Combustion head and gas train Combustion head
Pressure drop
Mcal/h
10
20
0
G25G20
0
30
40
50
60
70
80
90
20
40
60
80
100
120
140
160
180
200
220
240
260
280
MBC SE 1900
MBC SE 3100
MBC SE 1200
3000 35001500 25002000500 1000
kW2500 350030002000 4000500 1000 15000
0
100
G25G20
6
MBC SE 5000
Mcal/h
kW2500 350030002000 4000 4500
3000 400035001500 25002000
500 1000 1500
500 1000
20
40
00
60
80
100
120
140
20
40
60
80
100
120
140
160
180
200
MBC SE 1900
MBC SE 3100
MBC SE 1200
MBC SE 5000

0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 1234510620
50 60 10080 200 400 800 1000600
3
6
9
12
15
22
30 45 61 76 95 122 152
V
1234567810
20 30 40
1,4
1/2
3/4
1"
1" 1/2
6"
1" 1/4
4"
3"
2" 1/2
2"
PRESSURE DROP (mbar)
PIPE DIAMETER
PIPE LENGTH (m)
= G as output N mc /h
1 - G20
= 0,62 - G25
1,18 - G31
{
f
V
15,34
7
Figure A
The following diagram enables pressure drop in a pre-existing gas line to be calculated and to select the
correct gas train.
The diagram can also be used to select a new gas line when fuel output and pipe length are known. The
pipe diameter is selected on the basis of the desired pressure drop. The diagram uses methane gas as
reference; if another gas is used, conversion coefficient and a simple formula (on the diagram) transform
the gas output to a methane equivalent (refer to figure A). Please note that the gas train dimensions must
take into account the back pressure of the combustion chamber during operations.
Control of the pressure drop in an existing gas line or selecting a new gas supply line.
The methane output equivalent is determined by the formula fig. A on the diagram and the conversion
coefficient.
Once the equivalent output has been determined on the delivery scale ( ), shown at the top of the
diagram, move vertically downwards until you cross the line that represents the pipe diameter; at this
point, move horizontally to the left until you meet the line that represents the pipe length.
Once this point is established you can verify, by moving vertically downwards, the pipe pressure drop
of on the botton scale below (mbar).
By subtracting this value from the pressure measured on the gas meter, the correct pressure value will
be found for the choice of gas train.
Example: - gas used G25
- gas output 9.51 mc/h
- pressure at the gas meter 20 mbar
- gas line length 15 m
- conversion coefficient 0.62 (see figure A)
- equivalent methane output = 9.51 = 15.34 mc/h
0.62
- once the value of 15.34 has been identified on the output scale ( ), moving vertically downwards you
cross the line that represents 1" 1/4 (the chosen diameter for the piping);
- from this point, move horizontally to the left until you meet the line that represents the length of 15 m
of the piping;
- move vertically downwards to determine a value of 1.4 mbar in the pressure drop botton scale;
- subtract the determined pressure drop from the meter pressure, the correct pressure level will be found
for the choice of gas train;
- correct pressure = ( 20-1.4 ) = 18.6 mbar
V
V
V
SELECTING THE FUEL SUPPLY LINES

HYDRAULIC CIRCUIT
EN 267 > 100 Kg/h (TRD 604, NBN)
The hydraulic circuit of the RLS/E-EV MX series of burners
is characterised by a fuel pump with an independent
motor.
The burners are fitted with two valves (a safety valve
and an operation valve) and an oil filter along the oil
line from the pump to the nozzle.
A pressure regulator on the return circuit from the nozzle
enables the quantity of fuel burnt to be varied.
Two safety valves on the return circuit avoid oil leakage
from the nozzle when the burner is in stand-by and
prepurge phase.
The models are fitted with a maximum pressure switch
on the oil return circuit, and a minimum oil pressure
switch on the oil line from the pump to the nozzle.
The burner is suitable for continuous operation.
Example of the RLS/E-EV MX burner hydraulic circuit
P
PO min
VF
VS
MM
NL
U
AT
MR
SM
RO
PO max
VR
VR1
Pump with filter and pressure regulator
Min. oil pressure switch on the delivery circuit
Operating valve
Safety valve on the delivery circuit
Pressure gauge on the delivery circuit
Nozzle pipe
Nozzle
Actuator for opening and closing the nozzle needle
Pressure gauge on the return circuit
Servomotor
Pressure regulator on the return circuit
Max. oil pressure switch on the return circuit
Safety valve on the return circuit
Safety valve on the return circuit
P
VS
POmax RO
SM
VR
MR
POmin
U
NL
VF
VR1
M
MM
8

The fuel feed must be completed with the safety devices required by the local norms.
The table shows the choice of piping diameter, depending on the difference in height between the
burner and the tank and their distance.
With ring distribution oil systems, the feasible drawings and dimensioning are the responsibility
of specialised engineering studios, who must check compatibility with the requirements and
features of each single installation.
note
Model
Diameter piping
+H, -H (m)
+2,0
+1,5
+1,0
+0,5
0
-0,5
-1,0
-1,5
-2,0
-3,0
Ø1/2”
Lmax (m)
25
23
20
18
15
12
10
8
5
3
Ø 3/4”
Lmax (m)
85
80
70
65
60
50
45
35
30
15
H
Ø
P
V
1
2
3
4
5
6
7
8
9
10
7
10
95 V
P
+H
-H
8
1
4
10 cm 2
5
73
9
6
6
MAXIMUM EQUIVALENT LENGTH FOR THE PIPING L[m]
Difference in height pump-foot valve
Internal pipe diameter
Max. height 10 m
Height 4 m
Burner
Burner pump
Filter
Manual shut off valve
Suction pipework
Bottom valve
Remote controlled rapid manual
shut off valve
(compulsory in Italy)
Type approved shut off solenoid valve
(compulsory in Italy)
Return pipework
Check valve
RLS/E-EV MX
9
SELECTING THE FUEL SUPPLY LINES

The ventilation unit comes with
a sound proofing radial
regulating system.
All the burners in the RLS/E-EV
MX
series are fitted with fans
with reverse curve blades, which give excellent performance
and are fitted in line with the combustion head. The air flow
and sound-deadening materials used in the construction are
designed to reduce sound emissions to the minimum and
guarantee high levels of performance in terms of output and
air pressure.
A high precision servomotor through the main management
module installed on each burner of RLS/E-EV MX series,
controls the air dampers position constantly, guaranteeing
an optimal fuel-air mix.
COMBUSTION HEAD
VENTILATION
The innovative combustion
head adjustment system
ensures perfect movement
during modulation as well as
reducing noise and pollutants.
Simple adjustment of the combustion head allows to adapt
internal geometry of the head to the output of the burner.
The same adjustment servomotor for the air damper also
varies, depending on the required output, the setting of
the combustion head, through a simple lever.
This system guarantees excellent mix on all firing rates
range.
Flame dimensions
Example:
Burner thermal output = 3500 kW;
L
flame (m) = 3,5 m (medium value);
D
flame (m) = 1,5 m (medium value).
D
L
Burner output (MW)
02
3
5
1
13
2
4
6
7
4 5678 910
Flame length (m)
Flame diameter (m)
0
4
0
0,5
1
1,5
2
2,5
3
3,5
L
max
L
min
D
max
Dmin
10
Example of a RLS/E MX burner combustion head
Example of a sound proofing radial regulating system