Enertech Nu-Way MGN320 S1L 355 Technical specifications

Providing sustainable energy solutions worldwide
178 027 73
Installation- and maintenance instruction
MGN320 S1L 355

Components
1. Cover,inspection glass
2. Air pressure switch
3. Air adjustment
4. Inner assembly adjustment
(not town gas)
5. Multibloc
6. Flame cone
7. Connecting pipe
16. Motor
17. Ignition electrode
18. Transformer
19. Ionization electrode
20. Inner assembly
21. Nozzle
22. Brake plate
8. Air dampe
9. Air intake
10. Gas pressure switch
11. Ball valve
12. Control box
13. Electrical connection
14. Reset button
15. Fan wheel
172 205 39 08-01
DESCRIPTION

Capacity chart according
to EN 676
Output range
TECHNICAL DATA
The above dimensions are max. measurements. Depending on the compo-
nents used, the measurements may vary.
172 215 65 09-01
1 
Natural gas 10 kWh/Nm3
LPG 26 kWh/Nm3
2) Dimension and capacity depen-
ding on gas quality and available
pressure
Type Capacity
kW
Gas volume at a min.
output Nm3/h 1)
Gas volume at a max
output Nm3/h 1)
Max. inlet
pressure mbar
Rated inlet
pressure mbar
Natural gas/LPG Natural gas LPG Natural gas LPG Natural gas LPG
400 60-318 6 2,3 31,8 12,2 100 20 20
(5,0 kg/h) (24,8 kg/h)
2) Town gas 2) Town gas 2) Town gas 2) Town gas
Type designation BG 400
Dimensions
Length of burner tube Measure A
Standard 172 155
272 255
Long design 372 355
2) Motor Ignition transformer
Natural gas, LPG 1-phase, 0,25 kW, Primary 230 V, 1, A
1" 2 800 r/m, 230 V Secondary 8 000 V
2) Town gas
506
ø108
A 100
192
250
410
ø140
410

TECHNICAL DATA
172 215 30 07-01
ø175-240
M10

ø140

SKELETON DIAGRAMS, 1-STAGE BURNER
1.Ball valve
2.Filter
3.Governor
4.Pressure gauge with shut-off cock
5a.Gas pressure switch, mini
5b.Gas pressure switch, maxi
6a.Main valve
6b.Safety valve
1)7.Valve proving system
9.Air pressure switch
10.Gas burner control

according to EN 676.
1) Required over 1200 kW according
to EN 676.
When Bio gas is used, Bentone shall always be contacted.
!
172 415 04 08-01
Incorporated in the MultiBloc
3
6b
5b
10
6a
9
7
12
5a
4

Removal of fan house unit from
burner.
Loosen the screws. Swing out the fan
house. Remove the ionisation and
ignition cables from the electrodes.

Remove the combustion unit from the
     


as a pattern.
Removal of valve unit from burner
Remove the plug-in contact from the
multi-bloc. Loosen the union nut.
MOUNTING ON THE BOILER
Installation example
Connect the gas to the burner by
means of the ball valve. Ensure that
the union nut, ball valve and tubing
make it easy to remove the burner for
inspection and service.
172 205 36 08-01

172 425 16 08-01
ELECTRIC EQUIPMENT
Component list
A1 Gas burner control
A2 Twin thermostat
B1 Ionization electrode
F1 Fuse
H1 Alarm, 230 V
If there is no plug-in contact (X2) on the
boiler, connect to the contact enclosed.
In case the twin thermostat is in series
on incoming phase L1,
a loop between the terminals T1 and
T2 is necessary.
Mains connection in accordance with local regulations.
M1 Burner motor
S3 Main switch
S8 Air pressure switch
S9 Gas pressure switch
T1 Ignition transformer
X1 Plug-in contact, burner
X2 Plug-in contact, boiler
Y1 Gas solenoid valve
Gas burner control: LGB21/LMG21/LME11/LME21
Wiring diagram
1(5)

172 425 16 08-01
ELECTRIC EQUIPMENT
Control diagnosis under fault conditions and lockout indication
Gas burner control: LGB
Lock-out and Control Programme Indication
The position of the cam can be read through the sight-glass. Under fault condition
the programme is stopped and thus also the lock-out indicator. The symbol visible on
the cam indicates both the position in the programme run and the type of fault. The

No start because the control loop is interrupted
Waiting for the pre-purge to start
Air damper open (LGB22)
Fault condition due to absence of air pressure signal (LGB21),
air damper not open (LGB22)
Pre-purge period
Fuel release (LGB22)

safety time
Release of the 2nd fuel valve (LGB21)
Release of the load controller LR (LGB22)
Partial or full load operation (or return to the operating position)
Control Programme in Case of Faults
Basically, the fuel supply is stopped immediately in the case of any fault. If the fault
condition occurs at a time between start and pre-ignition, which is not indicated by
symbols, the cause is usually a switch-off by the air pressure switch LP or a too early,

• After supply voltage failure: Start-up repetition with unabridged programme.
• 
• If contacts of air pressure switch LP have welded during tw: No start.
• If no air pressure signal: Lock-out when t10 has elapsed.
• If air pressure failure
• If burner does not ignite: Lock-out when safety time t2 has elapsed.
•  Immediate lock-out.
• For ignition spark proving with QRE
closed and there is lock-out when t2 has elapsed.
Resetting the burner controls
The controls can be reset immediately after any fault condition. The programme re-
verts to its start position and programmes the controls for restarting the burners.

2(5)
A1 = LGB
GP
R/W
L N
br bl rt sw
sw rtQ1 = AGQ 1...
QRA
11112 2

172 425 16 08-01
3(5)
During the time the cause
of the fault is diagnosed,
the control outputs are
deactivated.
– The burner remains shut
down
– 
signal «AL» at terminal 10
The burner is switched on
only after a reset is made.
– Press lockout reset but-
ton for 0.5...3 seconds
ELECTRIC EQUIPMENT
Control diagnosis under fault conditions and lockout indication
Gas burner control: LMG ...
Diagnosis of cause of fault
After lockout, the red fault LED is steady on. For reading the cause of fault, refer to


Error code table
Blink code Possible cause
2 x
••
• 
– Fault or soiled detector electrode
– Fault or soiled fuel valves
– Poor adjustment of burner
3 x
•••
• Air pressure monitor does not close
– «LP» faulty
– «LP» incorrectly adjusted
– Fan motor does not run
4 x
••••
• Air pressure monitor does not open or extraneous light on
burner startup
– «LP» faulty
– «LP» incorrectly adjusted
5 x
•••••
• Extraneous light during pre-purging
– Or internal device fault
7 x
•••••••
• 
– Poor adjustment of burner
– Faulty or soiled fuel valves
– Short-circuit between detector electrode and ground
8...17 x
••••••••
.................
••••••••••
•••••••
• Free
18 x
••••••••••
••••••••
• Air pressure monitor opens during pre-purging or operation
– «LP» correctly adjusted
– 
19 x
••••••••••
•••••••••
• Faulty output contact
– Wiring error
– External power supply on output terminal
20 x
••••••••••
••••••••••
• Internal device fault
A1 = LMG
GP
R/W
L N
br bl rt sw
sw rtQ1 = AGQ 2...
QRA
11112 2
AL
FS
Red LED on 
Fault
Press lockout reset button
for > 3 s Blink code Off Blink code
Approx.
3 s

172 425 16 08-01
4(5)
ELECTRIC EQUIPMENT
Control diagnosis under fault conditions and lockout indication
Gas burner control: LME....
Colour codes
Diagnostics alarm trigger
The red alarm signal lamp lights continuously after the alarm is disconnected.

Limit on start attempts

or goes out during operation. LME 11 … permits a maximum of three start attempts if
the start cycle is uninterrupted.
Continuous
Off
Red
Yellow
Green
Colour code table for multi-coloured signal lamps (Light diodes)
Status Colour codes Colours
Waiting time «tw», other waiting times ○………………… Off
Ignition phase, ignition checked •○ •○ •○ •○ •○ • Flashing yellow
Normal operation  Green
  Flashing green
  Green-Red
Undervoltage  Yellow-Red
Disruption, alarm  Red
Flashing code for fault codes  Flashing red
Interface diagnostics  

AL
FS
Flash code Pause Flash code
Approx. 3 s
lights red Press the reset
button > 3 s

172 425 16 08-01
5(5)
ELECTRIC EQUIPMENT
Control diagnosis under fault conditions and lockout indication
Gas burner control: LME...
During alarm trigger diagnostics, control outputs are to be disconnected from all
power.
– The burner is disconnected
– Exception, the «AL» alarm signal at connection block 10
– The burner is only to be reconnected after it is reset
– Press the reset button 0.5...3 s
Interface diagnostics
To switch to interface mode, hold the reset button depressed for more than 3 s. To

unit is in the alarm mode, it is reset by pressing the reset button 0.5...3 s.

Alarm control table

on signal lamp
(LED)
Possible causes
Flashing 2 x
••
• 
– 
– Defective or obscured fuel valves
– Poor burner installation
– Defective ignition unit
Flashing 3 x
•••
«LP» defective
– No air monitor signal after «t10»
– «LP» is welded in the open position
Flashing 4 x
••••

Flashing 5 x
•••••
Time out «LP»
– «LP» is welded in the closed position
Flashing 6 x
••••••
Free
Flashing 7 x
•••••••

– Poor burner installation
– Defective or obscured fuel valves
– 
Flashing 8 x
••••••••
Free
Flashing 9 x
•••••••••
Free
Flashing 10 x
••••••••••
Connections fault or internal fault,
outgoing contacts or other fault
Flashing 14 x
••••••••••
••••
CPI contact not closed
A1 = LME
GP
R/W
L N
br bl rt sw
sw rtQ1 = AGQ 3...
QRA
11112 2

MEASURES AND CHECKS BEFORE START-UP, 1-STAGE BURNER
General rules
Care should be taken by the installer
to ensure that no electrical cables or
fuel/gas pipes are trapped or damaged
during installation or service/mainte-
nance.
Inner assembly
Ensure that the ignition and ionisation
electrodes are correctly adjusted. The
sketch shows the correct measure-
ments.
Gas quality
Ensure that the burner head is meant

Venting
The gas line is vented by loosening the
screw on the test nipple for the inlet
pressure. Connect a plastic hose and
conduct the gas into the open. After
having vented the gas line tighten
the screw again.
172 205 33 08-01
Leakage control
Leakage control
When making a leakage control of the
gas supply system the solenoid valve
should be closed. Connect a pressure

The test pressure in the system should
be 1,5x max. inlet pressure or min.
150 mbar. If any leakage, locate the
source by means of soapy water or
a leak location spray. After tightening
repeat the test.
Electric function test:
Ensure that phase and neutral are
not reversed. The gas shut-off cock
should be closed.To prevent the gas
pressure switch from locking out it
should be linked temporarily.
After the main switch has been
switched on and the thermostats have
been adjusted the pre-purging period
begins (30-35sec.). At the end of this
period the pre-ignition period starts
(0,5-2,5 sec. dependent on the design
of the gas control). The gas valve is
     
established. At the end of the safety
time (2-3 sec.) the gas control locks
out. The solenoid valve and the motor
will be "dead". Remove the link from
the gas pressure switch after the test

NOTE! Applies only to gas burner
control LFL1.
When using LPG (Propane) the burner
should be connected for post-purge.
Move connection to terminal 6 to ter-
minal 7 in the base of LFL1.

MEASURES AND CHECKS BEFORE START-UP
172 205 78 07-01
INNER ASSEMBLY
Town gas
INNER ASSEMBLY
Natural gas, LPG
INNER ASSEMBLY
Biogas (UV-detector)
Natural gas
LGP
2,5
8

172 205 16 07-01
If the barometer height, pressure and temperature of the gas deviate very much from the normal values this must

f = 273+t . 1013,25
273 B+Pu
t = Temperature of the gas at the gas meter (15°C)
B = Barometer height (945 mbar)
Pu= Pressure of the gas at the gas meter (15,0 mbar)
f = 273+15 . 1013,25
273 945+15
f = 11,1
The gas volume read on the gas meter actually reads 1,11 .12,9 = 14,4 m3/h.

Gas quality kWh/Nm3kJ/Nm3kcal/Nm3
Natural gas 10,3 37 144 8 865
Propane 26,0 93 647 22 350
Butane 34,3 123 571 29 492
Town gas 4,9 17 653 4 213
Bio gas 7,0 25 219 6 019
V = Gas volume Nm3/h
Q = Boiler output 120 kW
Hu=3, B. 10.3 kWh/Nm3
η=
Ex. A v= Q .3 600 =120 .3 600 ≈12,9 Nm3/h
Hu
· η37 144 .0,90
Ex. B v= 120 ≈12,9 Nm3/h
10,3 · 0,90
Example how to calculate the gas volume (natural gas)
DETERMINATION OF GAS VOLUME FOR THE INSTALLATION
  
gas and bio gas vary. For more exact
information please contact the gas
distributor.

ADJUSTMENT OF MULTI-BLOC, MB-DLE 405-420


405 - 412 S50 = 4 - 50 mbar
415 - 420 S20 = 4 - 20 mbar
415 - 420 S50 = 20 - 50 mbar

with adjustable start load and max.

1. Protective cover start load
adjustment
2. Hydralic damping
3. Fixing screw
4. Test nipple (inlet pressure)
5. Test nipple (pressure after
governor)
6. Test nipple (pressure in inner
assembly)
7. Governor
8. Filter
9. Gas pressure switch
10. Solenoid valve
Flow adjustment




      
screw again.
     
made by means of the governor.
Adjust the outlet pressure to a value

open valve. At small capacities (gas
 
as above.
Adjustment of governor
Adjust outlet pressure from governor
by means of a screw . Min. and max.
outlet pressures corresponds to appr.
60 turns of the spring. It is not possible
to change pressure springs in order
to change the outlet pressure.
Turn to the right = the outlet pressure
is increased
Turn to the left = the outlet pressure
is reduced

Remove the protective cover c.
Turn the adjustment knob d (use
the protective cover as a tool) to the


is reduced

increased

Adjustment of governor
Flow adjustment
172 505 02 08-01
d
c

GENERAL INSTRUCTIONS
Adjustment of burner
The burner is from the factory pre-set
to an average value that must then be
adjusted to the boiler in question.
All burner adjustments must be made
inaccordance withboilermanu-facturers
instructions. These must include the
    
average water temperature and CO2
or O2concentration.
General instructions
The installation of the gas burner
must be carried out in accordance
with current regulations and standards.
The installers of gas burners should
therefore be acquainted with all regu-
lations and ensure that the installation
complies with the requirements. The
installation, mounting and adjustment
should be made with the greatest
care and only the correct gas should
be used.
Operating instructions
The operating instructions accom-
panying the burner should be left
in a prominent position in the boiler
room.
Instructions
The user should be thoroughly
instructed in the function of the gas
burner and the whole installation.
The supplier must instruct the user.
Inspection and maintenance
Daily inspection is advisable.
Start up
      
the boiler and the electric connection,
the leakage control, the venting and
the electric function test have been
carried out, the burner will be ready
for start-up.
Howerer, study the sections dealing
with adjustments of multi-bloc, com-
bustion air and combustion head.
Open the ball valve and switch on the
main switch. If the burner starts the
actual adjustment can be made.
Adjustment of burner head
The burner is equipped with an adjust-
ment device changing the position of
the brake plate in the burner head. This
is used to adjust the correct pressure
drop over the combustion device in
order to obtain a good pulsation free
combustion.
Which position to use depends on
input and overpressure in the boiler.
172 305 28 07-01
A general rule is that the lower capacity
the smaller the opening between
brake plate and combustion device.
Commissioning of installation
Control of the combustion. The com-
bustion quality is checked by means


in accordance with the table. Check


gas volume on the gas meter so that
the correct input is achieved.
Service
Service should only be carried out

parts should be of the same make and
approved by the same authorities as
the original. If the burner is converted

re-commissioned. If town gas is to be
 
converted and the gas train adjusted
to suit (e.g.a larger gas armature or a
different spring in the governor may
be required).
Gas quality CO2
lambda 1,2
02max. CO2
Natural gas 10,0 3,5 11,9
LPG 11,5 3,5 13,9

172 305 31 08-01
GENERAL INSTRUCTIONS, 1-STAGE BURNER
Adjustment of inner assembly
Control of burner head
Air adjustment
Loosen the stop screw and turn the
knob along the scale to the desired
position and tighten the screw. Check

gas analysis.
Adjustment of brake plate
- Loosen the screw on the adjust-
ment device.
      
knob to the left.
 
knob to the right.
The adjustment of the position of the
  
therefore always necessary to make a

the adjustment device of the burner.
Control of burner head
To check the burner head, brake plate

Loosen the nuts a. Swing out the
burner. Remove the screw b and
the knob for adjustment of burner
head. Loosen the screw c so much
so that the inner assembly can be
pulled out.
Air adjustment

172 305 25 11-01
Flame monitoring and measure-
ment of ionisation current
The burner is monitored according
to the ionisation principle. Check the
ionisation current on start-up and on
each service call.
The reason for a low ionisation current
may be leaking currents, bad connec-
tion to earth, dirt or a faulty position

head. Sometimes also a faulty gas/air
mixture may cause too weak a ionisation
current.
The ionisation current is measured
by means of a microampere meter
(µA) connected in series with the
  
control.

required ionisation current according
to table. In practice this current must
be considerably higher, preferably
more than 10 µA. All the gas burners
are equipped with a ionisation cable
that can be slit which facilitates the
connection of the µA-device.
Gas pressure switches:

2,5-50 mbar GW 50
5-150 mbar GW 150
Adjustment of min. gas pressure
switch
The min. pressure switch should react
if the gas pressure is too low and
prevent the burner from starting. Too
low a gas pressure during operation
should stop the burner. The burner
may start again when the rated gas
pressure has been reached.
Remove the protective cover. Connect
a pressure gauge for measuring the
rated pressure. Decide on pressure
at which the gas switch should switch
off. Set this pressure by means of the
valve. Carefully turn the knob (see

switches off. The value shown on the
scale should then approximately cor-
respond with the value shown on the
pressure gauge. Tolerance on scale

GENERAL INSTRUCTION
Adjustemnt of max. gas pressure
switch
The burner is equipped with a max.
gas pressure switch only on request.
It should stop the burner if the gas
pressure exceeds the set value. The
burner can then only be re-started
manually (gas burner control or
overpressure switch).
Remove the protective cover. Connect
a pressure gauge for measuring the
rated gas pressure. Decide on pres-
sure at which the gas pressure switch
should switch off.Turn the adjustment
knob to this value. Tolerance on the

Adjustment of air pressure switch
The air presure switch should stop the
burner if the air volume is reduced.
The air proving device shall be adjusted

air supply at the highest or lowest
burner operating stage, the device
operates before the supervised pres-

at the controlled stage and the CO
content of the combustion products

Air pressure switch:

1-10 mbar LGW 10
2,5-50 mbar LGW 50
Flame monitoring
Gas pressure switch, air pressure
switch
Gas control Connection to terminal
in gas control
Min. ionisation
current required
LME 15 µ A
LGB 110 µ A
LFL 24 10 µ A
MMI 810 25 µ A
TMG 740-3 15 µ A

FINAL TEST OF THE INSTALLATION
172 305 17 07-01
–Make repeated start attempts to
ensure that the adjustments
function.
–Close the ball valve during
operation to check that the gas
switch switches off at the set
value.
–Remove the hose for the air
pressure switch to check that
the burner locks out.
–Check that all protective covers
and measurement nipples are
mounted and fastened.
–Fill out necessary test reports.
–Instruct the persons in charge
of the operation on the service
and maintenance of the installa-
tion and what to do should any
troubles occur.
–Inspection and service must
only be carried out by author-
ized people.
Fault location, functional troubles
Trouble free operation is dependent

supply. Should there be any changes
in the ratio between these three factors
there is a risk of break downs. It has
been proved that most break downs
are caused by simple faults. Before
callingtheservice engineer,thefollowing

–Is the gas cock open?
–Are all fuses in order and the
current switched on?
–Are the thermostats correctly
set?
–Are pressostats, overheating
protection etc. in operating posi-
tion and not locked-out?
–
–Is the gas burner control in start
position?
–Has the gas control or the motor
protector locked out? - Reset.
–Is the circulation pump in opera-
tion?
–Is there a supply of fresh air to
the installation?
If integral components are of a
different make from what is stated
in this manual, see the enclosed
loose-leaf.