Installation & Maintenance Manual
MGN 860- LN M3N Modulating
Gas Burner
Tel: +44 (0) 1905 794331 Fax: +44 (0) 1905 794017 Email: info@nu-way.co.uk Web: www.nu-way.co.uk
Contents
1 General information ....................................................................................................... 3
2 Checking scope of delivery and electrical data ............................................................. 3
3 Maintenance and customer service ............................................................................... 3
4 Operating instructions.................................................................................................... 3
5 Instruction of operating personnel ................................................................................. 3
6 Filter/Strainer ................................................................................................................. 3
7 Key for code designation ............................................................................................... 4
8 Technical specifications................................................................................................. 4
9 Boiler connection dimensions ....................................................................................... 4
10 Mounting the gas jacket on the boiler ............................................................................ 5
11 Mounting the burner housing on the gas jacket (service position)................................. 5
12 Electrical connection ..................................................................................................... 6
13 Air flap positioning motor .............................................................................................. 7
14 Air pressure switch ....................................................................................................... 7
15 Gas pressure switch for VPS......................................................................................... 8
16 Adjustment of the ignition electrodes ............................................................................ 8
17 Flame control with ionisation ......................................................................................... 8
18 Adjustment of the burner head ...................................................................................... 9
19 Control unit DMG 972 ................................................................................................... 9
20 Calculation principles for gas burner adjustment .......................................................... 11
21 Gas train KEV II1 ½" , KEV 2" and KEV DN65 ............................................................. 12
22 Gas train KEV25 1" and KEV30 1 ½" ........................................................................... 13
23 Leak check device (accessory) ..................................................................................... 14
24 Start-up .......................................................................................................................... 15
25 Possible faults ............................................................................................................... 16
26 Adjustment tables .......................................................................................................... 17
27 Explosion drawing / Spare parts list............................................................................... 18
28 Overall dimensions ........................................................................................................ 20
29 Working ranges.............................................................................................................. 20
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2
1 General information
Installation of a gas-fired heating system must be performed in accordance with the applicable regulations
and guidelines. It is therefore the duty of the installer to be familiar with all applicable regulations and requirements. Installation, start-up and maintenance must be performed with utmost care.
The burner must not be operated in rooms with high levels of air humidity (laundry rooms), dust or corrosive
vapours. The boiler room must be ventilated accordingly with ventilation air.
Nu-Way MG860/1350Series gas burners are suitable for combustion of natural gas in accordance with
EN 437 and are in compliance with the EN 676 European standard.
2 Checking scope of delivery and electrical data
Before installing the Nu-Way gas burner, please check that all items included in the scope of delivery are
present.
Scope of delivery:
burner housing, gas jacket with burner pipe, mounting kit, documentation and gas train.
Gas installation and commissioning are subject to the applicable national regulations. The gas pipe must
be designed to conform to the flow rate and the available gas flow pressure and routed with the lowest pressure loss over the shortest distance to the burner.
The loss of gas pressure via the gas train and the burner and the resistance on the fuel gas side of the heat
generator must be less than the connection flow pressure.
Caution!
Observe sequence and through-flow direction of valves and fittings.
3 Maintenance and customer service
A competent engineer appointed by the manufacturing company or any other qualified engineer should
check for leaks and make sure that the overall system is functioning correctly once a year.
We accept no liability for consequential damage in cases of incorrect installation or repair, the fitting of nongenuine parts or where the equipment has been used for purposes for which it was not intended.
4 Operating instructions
The operating instructions together with this technical information leaflet must be displayed in a clearly visible position in the boiler room. The address of the nearest customer service centre must be displayed on
the back of the operating instructions.
5 Instruction of operating personnel
Failures are often caused by operator error. The operating personnel must be properly instructed in how
the burner works. In the event of recurring faults, Customer Service should be notified.
6 Filter/Strainer
According EN676 a filter/strainer shall be fitted at the inlet of the safety shut-off valve to prevent the ingress
of foreign elements.
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3
7 Key for code designation
MGN(L)860-LN
LowNox
Burner output max
.
Natural gas LL + E ="N", LPG = "L"
Series
All dimensions in mm
220
250-290
M10
45°
45°
8 Technical specifications
Burner type
Technical specifications MG860-LN M3S MG1350-LN M3S
Min. burner output in kW 225 225
Max. burner output in kW 860 1350
Gas type Natural gas LL+E=“N“, LPG = „L“
Mode of operation modulation
Voltage 3 / PE ~ 50 Hz 400 V
Max. power consumption at start / during operation 6.5 A max./ 3.6 A eff. 8.0 A max./ 4.6 A eff.
Electric motor power (at 2800 rpm) in kW 1.1 2.2
Flame control Ionisation
Control box DMG 972
Weight in kg 56 58
Noise emission in db(A)
≤
78
9 Boiler connection dimensions
≤
78
4
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10 Mounting the gas jacket on the boiler
Air pressure
connection
B
A
A
B
Use adhesive to affix the gas-jacket gasket to the
gas jacket.
The boiler connection plate has to be prepared in accordance with the sizes as stated in "8 Boiler
connection dimensions". You can use the gas-jacket
gasket as a template.
Using an 8 mm socket-head wrench, attach the gas
jacket to the boiler using the supplied 4 M 10 fastening
screws and washers. Screw in the air pressure connection for compact unit KEV at the top.
11 Mounting the burner housing on the gas jacket (service position)
Position the burner housing in the gas-jacket hinge
and secure it with a rod. The burner is now in the service position.
Make sure that the gasket is correctly seated
between the gas jacket and the burner housing.
Swing the burner closed and insert the second securing rod into the hinge. Tighten the screw at the top to
secure the burner in position.
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5
12 Electrical connection
B
Cover
1
1
Always set the main switch to "Off" and remove
the fuse before connecting the cables or removing
electrical components.
The burner must be connected to the electricity supply
in accordance with the wiring diagram. This wok must
be performed by trained, qualified electricians. The
supply cable to the burner must be of the flexible type.
See Circuit diagram
The cover has to be removed and set to the service position in order to permit access to the control unit. Remove the 2 securing screws (1) and fold the cover down
to the left.
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6
13 Air flap positioning motor
ST0
ST1
ST2
Colour codes of the switching cams:
blue (II) = ST0 (position closed)
yellow (III/IV) = ST1 (position stage 1)
red (I) = ST2 (position stage 2)
Type Modulating
The air flap positioning motor is used for adjustment of
the air flaps on controlled burners with air shutters.
Make the adjustment using the limit switch cams on the
positioning drive roller.
The cam positions for adapting the burner to the required boiler output are specified in the adjustment table (pages 16-17) .
For this purpose, remove the hood from the air flap positioning motor. Adjust the cam positions on the levers
using a standard screwdriver (cam holder for fine adjustment).
If necessary, the switching cams can be adjusted as
required when setting the burner.
higher number = more air
lower number = less air
When adjusting the switching cams, please note the following:
– Do not set cam position ST1 via ST 2.
– After adjusting ST1 and ST2, toggle to the next stage and back again in order to activate the adjust-
ment.
– After setting the burner, replace the positioning motor hood and toggle the stage 1-2 switch to stage 2.
IMPORTANT!
Do not set cam position ST2 via mark 88.
14 Air pressure switch
The air pressure switch is a differential pressure switch
and is used for monitoring the pressure at the forcedair burner.
The air pressure switch is preset to 2.5 mbar
at the factory.
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7
15 Gas pressure switch for VPS
2,5 - 3 mm
ignition electrode
ionisations
electrode
The gas pressure switch is used for monitoring the gas inlet pressure. When the gas inlet pressure drops
below the minimum level (preset at the factory to 12 mbar), the burner is shut off. The burner starts up automatically again when the minimum pressure is exceeded.
16 Adjustment of the ignition electrodes
The ignition electrodes are preset at the factory.
17 Flame control with ionisation monitor
In the presence of an alternating-current voltage between burner and ionisation rod, the rectifying effect of
the flame causes a direct current to flow. This ionisation current is the flame signal and is amplified before
being output to the control box. A flame cannot be simulated, because the rectifying effect collapses if there
is a short-circuit between sensor electrode and burner.
Measuring ionisation current
The ionisation current must be measured during burner start-up and maintenance or after a fault indication
in the control box. Disconnect the plug of the ionisation cable and connect the ionisation
measuring cable.
Perform measurement straight after the post-ignition time during the safety time period !
The ionisation current must be at least 1.5 µA. Currents lower than 1.5 µA cause unstable operation or shutdown. If the current is too low clean the ionisation rod and the inside of the burner tube. It may be necessary
to correct the shape of the ionisation rod. If the ionisation rod is defective, replace the electrode. Reverse
the polarity of the ignition transformer, if necessary. Check the cables for moisture formation and dry if necessary.
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8
18 Adjustment of the burner head
19 Control unit DMG 972
Set the position of the burner head according to
burner output in accordance with the table on page
15ff.
Testing the control unit for proper functioning
Danger of fatal injury from electric shocks!
Disconnect electrical cable from power supply before
carrying out any work on live parts!
Troubleshooting may only be carried out by authorised
and trained personnel! Unlocking may only be carried
out by an authorised specialist.
Carry out the following checks after commissioning and each time after the burner has been serviced:
bypass the gas pressure monitor by disconnecting the grey cube connector on the compact unit. Close the
ball valve while operating the burner with the gas pressure monitor bypassed: the unit must go into fault
mode immediately after flame failure occurs. Start-up with ball valve closed and gas pressure monitor bypassed: the unit must go into fault mode after expiry of the safety period.
After checking the connection, cancel the fault and restore the unit to its original state. Check the air pressure switch contact: the unit must go into fault mode after the silicone connecting hose is disconnected.Re-
connect the hose to coupling "+".
Bypass the air pressure switch before start-up: a fault warning is indicated briefly after 10 sec., after which
the warning resets automatically. A second start-up attempt is made. If the air pressure switch contact is
still closed, a full failure shutdown will occur. If the air pressure switch opens the contact within 10 sec., the
burner will go into operation.
Safety and switching functions
In the event of flame failure during operation, the fuel feed is shut off immediately and the burner goes into
fault mode within 1 sec.A restart always takes place following a mains power failure.
If a flame signal is given during the pre-ventilation phase, a failure shutdown will occur immediately.
The position of the air pressure controller is continuously checked. There can be no start-up if it is not in its
neutral position. If the NO contact does not close or reopens during the pre-ventilation phase, a failure shutdown will occur. If there is an insufficient supply of air during operation, the air pressure controller contact
opens and the valves close immediately. The device switches to fault mode within 1 sec.
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9
Failure cause diagnostics
Luminous phase
Dark phase
lasting 10 secs.
lasting 0.6 secs.
Dark phase
lasting 1.2 secs.
Flash code
In case of failure, the LED is lit continuously. The light from the LED is interrupted every 10 sec. and a flash
code with information on the failure is output. This results in the following sequence which is repeated until
the failure is acknowledged, i.e. the unit is reset.
Following sequence:
Reader for failure code display:
SatroPen Art. No. 47-10-22542
SatroCom Art. No. 47-10-22563
Failure message Flash code Cause of fault
Fault shutdown No flame detection within the safety time
External light fault External light during monitored phase, possible sensor fault
Air controller in working position Air controller contact fused
Air controller time-out Air controller does not close within a defined time span
Air controller opens Air controller contact opens during start-up or operation
Flame failure Flame failure signal in operation
10
E.06.99 • G. 21.09.11
20 Calculation principles for gas burner adjustment
V
n
Q
n
η
k
H
×
i n,
--------------------
220kW
0 92 10×4
kWh
m
3
-----------
, ,
----------------------------------------= 23
m
3
h
------
= =
V
B
V
n
f
------
23
m
3
h
------
0 94,
-------------= 24
m
3
h
------
= =
f
B P
G
+
1013
--------------
273
273 ϑ
G
+
--------------------
×=
The values given in the tables are setting values for start-up.
The necessary system adjustment must be newly determined in each case.
General:
the calorific value (H
for the normal state (0°C, 1013 mbar).
) of fuel gases is generally specified
i,n
Natural gas type E H
Natural gas type LL H
LPG gas (Propane) H
= 10.4 kWh/m
i,n
= 9.3 kWh/m
i,n
= 25.89 kWh/m
i,n
3
3
3
Gas counters measure the volume of gas in the operational state.
Gas flow determination:
To allow the heat generator load to be adjusted correctly, the gas flow rate must be determined in advance.
Example:
Altitude above m.s.l. 230 m
Barometric air pressure B (acc. to table) 989 mbar
Gas pressure PG on gauge 20 mbar
Gas temperature
Boiler output Q
Efficiency η
Calorific value H
ϑ
G
n
(assumed) 92%
K
i,n
16°C
220 kW
10.4 kWh/m
3
Gas flow in standard state (Vn)
Gas flow in operating state (V B)
Conversion factor (f)
Annual average air pressure
Average geodetic altitude of the
supply region above sea level [m]
Annual average of air pressure (mbar) 1016 1013 1007 1001 995 989 983 977 971 965 959 953 947 942 936 930
Legend:
Qn = boiler output [kW]
η
= efficiency [%]
K
H
= lower standard calorific value [kWh/m3]
i,n
f = conversion factor
B = barometric air pressure [mbar]
= gas pressure at gas meter [mbar]
p
G
ϑ
= gas temperature at gas meter [°C]
G
E.06.99 • G. 21.09.11
from 1 51 101 151 201 251 301 351 401 451 501 551 601 651 701
to 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750
11
21 Gas train KEV
Gas pressure switch
SKP 15
VGD
Pulse line p
G
SKP 75
Cover plate for
"AIR" air pressure connection
(gas inlet pressure)
Adjustment screws
Pressure gauge
Nozzle pressure p
G
p
F
detail
1 ½" , KEV 2" and KEV DN65
II
Installing the gas train
Installation position only in horizontal line, not tilted.
Minimum distance to walling 20 mm
Screw the combustion chamber pressure measuring nipple into the gas jacket at the top (see "10 Mounting the gas jacket on
the boiler").
Route the connecting hose between the measuring nipple for combustion chamber pressure and the gas train in a loose loop.
Screw each air pressure measuring nipple into the top of the gas jacket (see 10. Mounting the gas jacket
on the boiler).
Connect the blue hose to the "AIR" connection on the gas train and the air pressure connection on the gas
jacket. The blue hose serves as a control line for the gas train and must be routed in a loose loop without
kinking.
Remove the plate for covering the adjustment screws from the gas pressure regulator.
Start the burner.
1. Setting the air surplus in high and low-load operation
• Set the air flap positions P9 for high-load operation and P1 for low-load operation as specified in
26. Adjustment tables.
• In high-load operation, set the air surplus with the "large flame" adjustment screw on the gas pressure
regulator. The CO2 level in the flue gas should be 9-10% for natural gas.
• In low-load operation, set the air surplus with the "small flame" adjustment screw on the gas pressure
regulator. The CO2 level in the flue gas should be 9-10% for natural gas. The low-load setting influences the high-load setting.
• In high-load operation, check the air surplus and, if necessary, correct the setting with the "large
flame" adjustment screw on the gas pressure regulator.
2. Setting the output in high and low-load operation
• Check the high-load setting via the gas flow at the gas meter or compare the nozzle pressure with the
values stated in 26. Adjustment tables. The output can be increased by opening the air flap (to
increase P9) and reduced by closing the air flap (to reduce P9). The air surplus is not affected by this
adjustment.
• Check the low-load setting via the gas flow at the gas meter or compare the nozzle pressure with the
values stated in 26. Adjustment tables. The output can be increased by opening the air flap (increase
P1) and reduced by closing the air flap (reduce P1). The air surplus is not affected by this adjustment.
12
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22 Gas train KEV25 1" and KEV30 1 ½"
A
B
Installing the compact unit
Installation position only in horizontal line, not tilted.
Minimum distance to walling: 20 mm
Screw the air pressure measuring nipple into the gas jacket at the top (see "10 Mounting the gas jacket on the boiler").
Route the connecting hose between the measuring nipple for air pressure and the compact unit in a loose loop.
A Test socket A
B Test socket B
Test socket pF
Test socket pL
pG1 = pressure, stage 1 (N)
pG2 = pressure, stage 2 (V)
pw = gas pressure monitor pressure
• Connect the air control line between the compact unit test socket pL and the test socket on the gas
jacket.
• Connect the combustion chamber control line between the compact unit test socket pF and the measuring point on the combustion chamber. Route the control line in such a way that condensate cannot
flow into the compact unit, but flows back into the combustion chamber. If there is no measuring point
on the combustion chamber, the assembly control line can be dispensed with.
• Preset the combustion air for stage 2 or. Max. load and for stage 1 or Min. load on the air flap positioning motor as per Table.
• Set the flue-gas values on the compact unit at adjustment screw V using a 2.5 mm socket wrench (factory preset for initial start-up).
CO2 too high => reduce V
CO2 too low => increase V
• After completing the adjustment, switch from stage 2 to 1.
• Set the flue-gas values for stage 1 or Min. load at adjustment screw N using a 2.5 mm socket wrench
(factory preset for initial start-up).
CO2 too high => reduce N
CO2 too low => increase N
• Check the values again at full load and low load and make adjustments where necessary.
• Check the burner output by clocking the gas flow at the gas meter or compare the nozzle pressures.
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13
23 Leak check device (accessory)
The leak check device is an automatic valve monitoring device. The two gas solenoid valves integrated in
the gas line are checked for integrity. After a controlled shutdown of the burner or forward before restarting
the purge time, the gas pressure is increased in the test line between the gas solenoid valves. After the test
period expires, the burner control contact is enabled when the test line is tight. The leak check device is
checked for intrinsic safety before each start.
If a leak has occurred (pressure drop in the test line), the leak check device goes into failure mode and the
burner control contact is disabled.
24 Start-up
The burner can be put into operation once the gas and electrical installation and assembly work has been
completed.
• Prepare your flue-gas analyser.
• Set the air flap positioning motor as described in section 12.
• Prepare your gas train as described in section 21, 22.
• Switch on the burner.
• After the burner is started, toggle the switch to stage 2 (high load).
• Set the air flap to the desired output range (see adjustment table).
• Set the gas pressure by adjusting pG2 (V) according to the necessary maximum burner output.
• Check the flue-gas values (CO2, CO, O2). The CO2 level in the flue gas should be 9-10% for natural
gas (see section 20).
• After correct adjustment of stage 2 (high load), toggle the switch to stage 1 (low load). Set the gas
pressure by adjusting pG1 (N) as per the table.
Check the flue-gas values and adjust if necessary (see section 20).
• After making the adjustment, toggle the switch to stage 2 (high load) and check the flue-gas values
again.
• The setting data must be logged once adjustment is complete.
• Check the gas pressure controller after start-up.
Close the ball valve slowly, the burner must switch off without triggering a fault.
• Check the values again at full load and low load and make adjustments where necessary.
• If the inlet flow pressure is higher than 20 mbar, set the gas pressure monitor to approx. 70-80% of the
inlet flow pressures.
14
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25 Troubleshooting
Defect determined:
Burner motor does not
start up
Burner starts up and
switches to fault mode
before or after expiry of
safety period
Flash code DMG
972
- Electric supply lead faulty Rectify faults in electrical installation
- Fuse faulty Replace
- Safety thermostat locked Unlock
- Temperature of controller setting is
- Control box faulty Replace
- Leak Rectify leak
- No gas Safeguard gas supply
- Gas pressure monitor faulty Replace the compact unit
- Filter in compact unit dirty Clean or replace
- Air pressure switch not in idle position Check air pressure controller
- No load at terminal 5 Check plug connection and current path of
Cause: Remedy:
Renewed start attempt after temperature
exceeded
Burner motor faulty Replace
Mains voltage <
Ionisation signal Solenoid valve leaky, replace compact unit
Air pressure monitor does not switch
through during pre-ventilation
Ionisation monitoring device affects
ignition
Gas solenoid valve does not open Replace the compact unit
Starting gas quantity set too low Increase starting gas quantity
No ignition Check ignition electrode and setting, igni-
187 V
drop
solenoid valve
Rectify faults in electrical
installation
See Page 6
See Page 7
tion transformer and cable
Flame extinguishes
during operation
Burner motor starts up
briefly. Control unit
switches to fault mode
Control box resets automatically
- No gas Safeguard gas supply
- Filter in compact unit
Any failure flash
code
Intermittent fault
(10 sec.)
Phase and zero mixed up Connect connector unit in correct phase
sequence
Ionisation monitoring device faulty Check according to Page 7
Air pressure switch opens during operation
Gas nozzle dirty or faulty Replace gas nozzle
dirty
Flame failure Wrong burner setting (see page 13)
Air pressure monitor contact opens Check/replace air pressure switch (see
Flame signal too weak Measure flame signal, check ionisation
Control unit was not
reset
Air pressure controller not in
neutral position
Gas pressure monitor cause brief (1-5
sec.) gas pressure fluctuations.
See Page 6
Clean or replace
page 6)
electrode
Reset control unit fault
Check air pressure controller
Safeguard gas supply. Set the gas pressure switch and set a lower start point if
necessary.
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15
26 Adjustment tables
The values given in the tables are only setting values for start-up. The necessary system adjustment must be newly determined in the
case of deviating data such as boiler output, calorific value and altitude.
A correction is required in any case.
The maximal burner output can only be achieved in mixing head position 0. Due to the variable mixing head position, the operating
behaviour of the burner can be optimised for different heat generators.
MGN860-LN M3S MGL860-LN M3S
Natural gas LL
Hi,n = 9.3 [kWh/m
3
]
Natural gas E
H
i,n
= 10.4 [kWh/m
3
]
LPG
H
i,n
= 25.89 [kWh/m
3
]
Burner output
[kW]
Boiler output
η= 92%
[kW]
Air flap
position
[ ° ]
Burner
heat pos.
[mm]
Gas nozzle
pressure
[mbar]
Gas flow rate
[m
3
/h]
Gas nozzle
pressure
[mbar]
Gas flow rate
[m
3
/h]
Gas nozzle
pressure
[mbar]
Gas flow rate
[m
3
/h]
Stage 2 Stage 1 Stage2
I
(red)
Stage1
III
(yellow)
Stage2 Stage1 Stage2 Stage1 Stage2 Stage1 Stage2 Stage1 Stage2 Stage1 Stage2 Stage1
450 224 419 26.0 9 22 7.3 2.1 49.9 24.8 5.7 1.6 44.6 22.2 7.4 2.0 17.4 8.7
520 260 484 33.0 12 22 9.6 2.7 57.6 28.8 7.5 2.1 51.5 25.8 9.5 2.7 20.1 10.0
600 300 558 40.0 14 22 12.0 3.5 66.5 33.3 9.4 2.7 59.5 29.7 12.1 3.6 23.2 11.6
740 370 688 90.0 19 22 14.7 5.0 82.0 41.0 11.5 3.9 73.4 36.7 17.4 5.2 28.6 14.3
560 280 521 30.5 13 10 7.9 2.7 62.1 31.0 6.2 2.1 55.5 27.8 9.4 2.9 21.6 10.8
640 320 595 36.0 17 10 10.3 3.5 70.9 35.5 8.1 2.7 63.4 31.7 11.8 3.6 24.7 12.4
760 380 707 51.0 21 10 14.5 4.8 84.2 42.1 11.3 3.8 75.3 37.7 16.0 4.8 29.4 14.7
813 410 756 90.0 22.5 10 16.2 5.2 90.1 45.4 12.7 4.1 80.6 40.6 18.0 5.5 31.4 15.8
600 300 558 30.0 10 0 9.1 2.8 66.5 33.3 7.1 2.2 59.5 29.7 9.0 2.9 23.2 11.6
680 340 632 34.0 13 0 11.2 3.5 75.4 37.7 8.8 2.7 67.4 33.7 11.3 3.5 26.3 13.1
780 390 725 44.0 17 0 14.3 4.3 86.5 43.2 11.2 3.4 77.3 38.7 14.5 4.3 30.1 15.1
860 430 800 90.0 20 0 17.4 5.0 95.3 47.7 13.6 3.9 85.2 42.6 17.4 5.1 33.2 16.6
16
E.06.99 • G. 21.09.11
MGN1350-LN M3S MGL1350-LN M3S
Natural gas LL
Hi,n = 9.3 [kWh/m
3
]
Natural gas E
H
i,n
= 10.4 [kWh/m
3
]
LPG
H
i,n
= 25.89 [kWh/m
3
]
Burner output
[kW]
Boiler output
η= 92%
[kW]
Air flap
position
[ ° ]
Burner
heat pos.
[mm]
Gas nozzle
pressure
[mbar]
Gas flow rate
[m
3
/h]
Gas nozzle
pressure
[mbar]
Gas flow rate
[m
3
/h]
Gas nozzle
pressure
[mbar]
Gas flow rate
[m
3
/h]
Stage 2 Stage 1 Stage2
I
(red)
Stage1
III
(yellow)
Stage2 Stage1 Stage2 Stage1 Stage2 Stage1 Stage2 Stage1 Stage2 Stage1 Stage2 Stage1
44.0 220 405 22 9 22 4.9 1.3 48.8 24.6 3.8 1.0 43.6 22.0 4.3 1.6 17.0 8.5
600 300 552 30 13 22 6.9 2.5 66.5 33.3 5.4 2.0 59.5 29.7 7.5 2.4 23.2 11.6
800 400 736 40 20 22 12.8 4.2 88.7 44.3 10.0 3.3 79.3 39.7 12.8 3.7 30.9 15.4
1000 500 920 90 25 22 19.6 5.2 110.9 55.4 15.3 4.1 99.1 49.6 19.5 5.4 38.6 19.3
500 250 460 25 9 10 5.0 1.2 55.4 27.5 3.9 0.9 49.6 24.6 4.5 1.5 19.3 9.7
660 330 607 32 17 10 7.0 3.0 73.2 36.6 5.5 2.3 65.4 32.7 7.4 2.2 25.5 12.7
860 430 791 41 22 10 13.0 4.2 95.3 47.7 10.2 3.3 85.2 42.6 12.3 3.4 33.2 16.6
1080 540 994 90 27 10 20.3 5.3 119.7 59.9 15.9 4.1 107.1 53.5 19.2 5.1 41.7 20.9
600 300 552 21 10 0 5.1 1.4 66.5 33.3 4.0 1.1 59.5 29.7 4.9 1.5 23.2 11.6
800 400 736 26 14 0 8.6 2.4 88.7 44.3 6.7 1.9 79.3 39.7 8.6 2.4 30.9 15.4
1100 550 1012 43 19 0 16.0 4.9 121.9 61.0 12.5 3.8 109.0 54.5 16.2 4.2 42.5 21.2
1350 680 1242 90 24 0 24.6 6.3 149.7 75.4 19.2 4.9 133.8 67.4 24.5 6.2 52.1 26.1
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27 Explosion drawing / Spare parts list
ZBZ_2-168
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Item Designation PU Art. No.
1 Burner tube MG860-LN 47-90-24880
1 Burner tube MG860-LN, extended by 100 mm 47-90-25260
1 Burner tube MG860-LN, extended by 200 mm 47-90-25261
1 Burner tube MG1350-LN 47-90-24878
1 Burner tube MG1350-LN, extended by 100 mm 47-90-25258
1 Burner tube MG1350-LN, extended by 200 mm 47-90-25559
2 Flow plate complete with ignition electrode 47-90-24877
3 Ignition- Ionisation electrode compl. consist to no. 3 and 5 47-90-27354
4 Spare part set Ignition- Ionisation electrode compl. 47-90-25134
4 Spare part set Ignition- Ionisation electrode compl., ext. by 100 mm 47-90-27356
4 Spare part set Ignition- Ionisation electrode compl., ext. by 200 mm 47-90-27357
7 Gasket for gas nozzle 5 47-50-25500
8 Gas nozzle complete 47-90-26626
8 Gas nozzle complete , extended by 100 mm 47-90-26698
8 Gas nozzle complete , extended by 200 mm 47-90-26699
8 Gas nozzle complete 47-90-26709
8 Gas nozzle complete, extended by 100 mm 47-90-26710
8 Gas nozzle complete , extended by 200 mm 47-90-26711
9 Sealing ring for cover 47-90-10698
10 Actuator drive STA 12 complete till 08.08 47-90-25376
10 Actuator drive STA 12 complete from 09.08 47-90-27031
11 Air flap complete till 08.08 47-90-24663
11 Air flap complete from 09.08 47-90-27030
12 Cover for sight glass 47-90-12106
13 Cover 47-90-24857
14 Sight glass 36-90-11544
15 Fan wheel ∅218 x 80 for MG860-LN 36-90-11540-01
15 Fan wheel ∅224 x 82 for MG1350-LN 47-90-24847
16 1.1 kW 400 V / 50 Hz motor for MG860-LN 47-90-26721
16 2.2 kW 400 V / 50 Hz motor for MG1350-LN 47-90-24846
17 1.1 kW motor complete with fan wheel for MG860-LN 47-90-25205
17 2.2 kW motor complete with fan wheel for MG1350-LN 47-90-25508
18 4-pole female connector, green 37-90-20744
19 7-pole female connector, black / brown 37-90-20731
20 5-pole female connector, black 37-50-20748
21 Socket CR-PLSx 47-90-26713
22 Relay CR-P230AC2 47-90-25199
23 Thermal relay T7DU MG860-LN 47-90-25172
23 Thermal relay T7DU MG1350-LN 47-90-25173
24 Miniature motor contactor B7-30-10 47-90-25171
25 Lower section, control box 31-90-22393
26 Control box DMG 972 47-90-22232
27 Electronic ignition transformer , complete 47-90-24469
28 7-pole female connector, green 37-90-10831
29 Terminal box cover 47-90-24852
30 Control panel 47-90-25389
31/33/35 Gasket complete 47-90-26722
32 Gas jacket part 2, complete 44-90-30242
34 Gas jacket part 1, complete 44-90-30245
36 Securing rod 2 46-50-21085
37 Differential pressure switch 47-90-26723
- Fan inlet device 36-90-11541
- Protective screen 47-90-10696
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Enertech Limited,
P O Box 1,
Vines Lane
Droitwich,
Worcestershire,
WR9 8NA
Tel: +44 (0) 1905 794331 Fax: +44 (0) 1905 794017
Email: info@nu-way.co.uk Web: www.nu-way.co.uk
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