Enertech Bentone BFG1 User manual

178 051 35-3 2012-11-27
Installation- and maintenance instruction
BFG1

3Bentone BFG1
General
Table of contents
GENERAL
Important to think about!_____________________________________________4
Safety instructions______________________________________________________4
Warning ____________________________________________________________________4
Safety instruction________________________________________________________5
Delivery check____________________________________________________________5
Preparations for installation__________________________________________5
1. TECHNICAL DATA _________________________________________________________6
1.1 Dimensions BFG1 ____________________________________________________6
1.1.1 Dimensions flanges________________________________________6
1.2 Capacity range BFG1 H1, BFG1 H2 and BFG1 H3______7
1.3 Model BFG1 H1_______________________________________________________8
1.3.1 Burner output/ Basic settings_________________________8
1.4 Model BFG1 H2_______________________________________________________9
1.4.1 Burner output/ Basic settings_________________________9
1.5 Model BFG1 H3_____________________________________________________10
1.5.1 Burner output/ Basic settings_______________________ 10
1.6 Description____________________________________________________________ 12
1.6.1 Components_______________________________________________13
2. INSTALLATION ____________________________________________________________ 14
2.1 Skeleton diagrams _________________________________________________14
2.2 Delivery check _______________________________________________________15
2.3 Preparations for installation_____________________________________15
2.4 Gas supply ____________________________________________________________15
2.5 Electric connection_________________________________________________15
2.6 Setting brake plate and air flow________________________________15
2.7 Burner installation___________________________________________________ 16
2.7.1 Hole pattern________________________________________________ 16
2.7.2 Burner installation________________________________________ 16
2.7.3 Gas connections _________________________________________16
2.7.4 Electric connection ______________________________________16
2.8 Control measures___________________________________________________ 17
2.8.1 Gas quality _________________________________________________ 17
2.8.2 Bleeding_____________________________________________________17
2.8.3 Function test_______________________________________________17
2.8.4 Leakage testing___________________________________________17
3. BASIC SETTINGS ________________________________________________________ 18
3.1 Determination of gas quantity for the system_____________18
3.1.1 Example of how to calculate the gas quantity
(natural gas):_______________________________________________ 18
3.1.2 Nozzle assembly adjustment ________________________ 19
3.1.3 Air intake adjustment ___________________________________19
3.1.4 Air quantity setting procedure _______________________ 19
3.1.5 Inlet cone, air control ___________________________________20
3.1.6 Rotation of air intake____________________________________20
3.1.7 Air duct ______________________________________________________20
4. BURNER SERVICE ______________________________________________________ 21
4.1 Service__________________________________________________________________ 21
4.1.1 Combustion device service___________________________ 21
4.1.2 Fan motor replacement________________________________22
4.1.3 Air intake and inlet cone service ____________________23
4.1.4 Fan wheel check _________________________________________ 23
4.1.4.1 Inspection ______________________________________________23
4.1.5 Fan wheel service________________________________________ 24
4.1.6 Electrical package _______________________________________24
4.1.6.1 Complete electrical package replacement _____________25
4.1.6.2 Single electrical package component replacement____26
5. MULTIBLOCK______________________________________________________________ 27
5.1 GB-LD055 D01...___________________________________________________27
5.1.1 Setting multiblock, GB-LD055 D01..._____________ 28
5.1.1.1 Setting the gas flow ____________________________________28
5.1.1.2 Setting the pressure regulator__________________________28
5.1.1.3 Coil replacement _______________________________________28
5.1.1.4 Replacement of gas pressure switch (GW...A5)________28
5.1.1.5 Important _______________________________________________28
5.2 MBC-65-DLE-S20__________________________________________________29
5.2.1 Setting multiblock, MBC-65-DLE-S20 ___________30
5.2.1.1 Setting gas flow ________________________________________30
5.2.1.2 Setting pressure regulator______________________________30
5.2.1.3 Replacement of coil ____________________________________30
5.2.1.4 Replacement of gas pressure switch (GW...A5)________30
5.2.1.5 Important _______________________________________________30
5.3 MBC-120-DLE-S20________________________________________________31
5.3.1 Setting multiblock, MBC-120-DLE-S20 _________32
5.3.1.1 Setting gas flow ________________________________________32
5.3.1.2 Setting pressure regulator______________________________32
5.3.1.3 Setting start gas flow___________________________________32
5.3.1.4 Replacement of coil ____________________________________33
5.3.1.5 Replacement of gas pressure switch (GW...A5)________33
5.3.1.6 Important _______________________________________________33
6. GENERAL INSTRUCTIONS __________________________________________ 34
6.1 Flame monitoring and ionisation current check__________ 34
6.1.1 Flame monitoring ionisation __________________________ 34
6.1.2 UV –detector (QRC)_____________________________________34
6.1.3 Flame monitoring UV-detector (QRC)_____________34
6.1.4 Setting of air pressure switch________________________35
6.1.5 Setting gas pressure switch min____________________ 35
6.1.6 Setting gas pressure switch max___________________35
6.1.7 Air pressure switch, gas pressure switch________36
6.1.8 Handing over of the installation _____________________37
7. ELECTRIC EQUIPMENT LME...____________________________________ 38
7.1 Wiring diagram ______________________________________________________38
7.1.1 List of components______________________________________39
7.1.2 Function LME...___________________________________________39
7.2 Control program at faults; fault mode indicator LME ....__40
7.2.1 Colour codes ______________________________________________40
7.2.1.1 Diagnosing alarm causes_______________________________40
7.2.1.2 Limiting of starting repetitions __________________________40
7.2.1.3 Alarm code table _______________________________________41
7.2.1.4 Interface diagnostics ___________________________________41
8. FAULT LOCATION GUIDE ____________________________________________ 42
8.1 Gas Burner____________________________________________________________ 42
9. DECLARATION OF CONFORMITY _______________________________ 46
10. GENERAL INSTRUCTIONS FOR GASBURNERS_______ 47
General

4Bentone BFG1
General
Warning
!
Important to think about!
Read this manual
• This manual should be taken into account by all who, for whatever
reason, work
with the apparatus and associated system parts.
• This manual is aimed specifically at authorized personnel.
• This manual should be viewed as a part of the burner and should
always be kept
close to the installation site.
Safety instructions
The electrical installation should be performed in accordance with the power
wiring regulations and in accordance with professional standards, in order to
avoid leaking gas, fire, and injuries.
Warning
• The manual should be read before the burner is installed and placed
into service.
• The burner should be installed by authorized personnel only.
• Ensure that the burner is adapted to the efficiency range of the boiler.
• The burner should be installed in such a manner as to meet local
regulations for electric safety, boiler and fuel distribution.
• Ensure that the burner is approved for the intended gas quality and
connection pressure.
• No safety systems on the burner may be disconnected.
• The installer must ensure that the boiler room has sufficient fresh air
ventilation as per local norms.
• Before servicing, close the fuel supply and switch off the power to the
burner.
• The surface temperature on the burner components can exceed 60°C.
• Be careful when servicing: a pinch risk may be present.
• Ensure that the burner is protected against direct wet spraying, since
the construction is not adapted for this.
• Only spare parts recommended by Enertech should be used.
• This burner cannot be used for biogas without first contacting
Enertech.

5Bentone BFG1
General
Warning
!
Safety instruction
• If an electric connector other than the one recommended by Enertech
is used, a risk of damage and injury can arise.
• In order to avoid leaking gas, fire, and injuries, the electrical installation
should be performed in accordance with the power wiring regulations
and in accordance with professional standards.
• Accuracy should be observed in order not to pinch or damage electric
cables or gas pipes during installation or service.
• If the boiler is equipped with an opening door, this should be
interlocked with a door switch.
Delivery check
• Check that all has been delivered and that the goods have no transport
damages.
• If something is wrong with the contents of the delivery, please notify
the delivery company.
• Transport damages should be reported to the forwarding agency.
Preparations for installation
• Check that the measurements and capacity range of the burner are
compatible with the boiler.
• The power ratings on the type plate refer to the min. and max. power of
the burner.

6Bentone BFG1
General
135
286 195
186 35 195
B
A
ø89,7 17
130-150
10,3
ø90 5
125-150
10,3
145
109,5
10
23,5
1. TECHNICAL DATA
1.1 Dimensions BFG1
The above-mentioned measurements are maximum measurements. They can vary, depending on which components
are used.
1.1.1 Dimensions flanges
Flange 1
BFG1 H1 and BFG1 H2
Flange 2
BFG1 H1 and BFG1 H2
Flange 3
BFG1 H3

7Bentone BFG1
General
1.2 Capacity range BFG1 H1, BFG1 H2 and BFG1 H3
Capacity
kW
Gas quantity
at min. power
Nm3/h 1)
Gas quantity
at max. power
Nm3/h 1)
Max. inlet
pressure
mbar
Nominal inlet
pressure
mbar
15 - 60 BFG1 H1
G 20 1,59 6,35 60/360 2) 20
G 25 1,86 7,44 60/360 2) 25
G 30 0,47 1,86 60/360 2) 30
G 31 0,61 2,45 60/360 2) 30
15 - 65 BFG1 H2
G 20 1,59 6,88 60/360 2) 20
G 25 1,86 8,06 60/360 2) 25
G 30 0,47 2,02 60/360 2) 30
G 31 0,61 2,66 60/360 2) 30
25 - 100 BFG1 H3
G 20 2,65 10,58 60/360 2) 20
G 25 3,10 12,41 60/360 2) 25
G 30 0,75 3,10 60/360 2) 30
G 31 1,02 4,09 60/360 2) 30
Type kWh/Nm31) kWh/kg
G20 : Natural gas H 9,45
G25 : Natural gas L 8,06
G30 : Butane 32,24 12,68
G31 : Propane 24,44 12,87
Fitting 3) Motor Ignition transformer 4)
BFG1 H1 / H2 / H3
Natural gas, Propane
½” - 1”
110 W
230 V, 50/60 Hz
0,9 A
Prim. 230/240 V, 0,15 A
50-60 Hz
Sec. 26 kV Peak 40 mA
E.D. 50% in 3 min
1. Normal state at 15°C 1013,25 mbar (acc. to EN676).
2. Max inlet pressure can vary depending on choice of multiblock.
Indicated pressure applies to Dungs standard block type MBC...
3. The dimension should be adapted in accordance with capacity,
gas quality and inlet pressure.
4. Data apply to Fida model 26/40 50%.

8Bentone BFG1
General
!Scale value valid at 0 mbar in furnace pressure.
ø89
9,5-10,5
2,5-3,0
7,0-8,0
0,0-2,0
-0,5
0,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
10 15 20 25 30 35 40 45 50 55 60 6
5
Pressure in the furnace mbar
Burner output kW
Scale
0
2
4
6
8
10
12
14
16
18
20
22
15 20 25 30 35 40 45 50 55 60
Burner output kW
Air setting
Nozzle assembly setting
1.3 Model BFG1 H1
1.3.1 Burner output/ Basic settings
15 - 60 kW
Blast tube length
mm
Blast tube
Dimension A mm
Flange
Dimension B ø
108 81 89
140 113 89
The above-mentioned measurements are maximum measurements. They
can vary, depending on which components are used.

9Bentone BFG1
General
!Scale value valid at 0 mbar in furnace pressure.
7,0-8,0
0,0-2,0
2,5-3,0
9,5-10,5
ø89
Pressure in the furnace mbar
Burner output kW
-0,5
0,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
10 15 20 25 30 35 40 45 50 55 60 65 70
0,0
2,0
4,0
6,0
8,0
10,0
12,0
14,0
16,0
18,0
20,0
22,0
15 20 25 30 35 40 45 50 55 60 65
Air setting
Nozzle assembly setting
Scale
Burner output kW
1.4 Model BFG1 H2
Blast tube length
mm
Blast tube
Dimension A mm
Flange
Dimension B ø
115 88 89
147 120 89
The above-mentioned measurements are maximum measurements. They
can vary, depending on which components are used.
1.4.1 Burner output/ Basic settings
15 - 65 kW

10 Bentone BFG1
General
!Scale value valid at 0 mbar in furnace pressure.
29,0-31,0
16,0-71,0
ø103
2,5-3,5
7,5-8,5
Pressure in the furnace mbar
Burner output kW
-0,5
0,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
20 30 40 50 60 70 80 90 100 Burner output kW
0,0
2,0
4,0
6,0
8,0
10,0
12,0
14,0
16,0
18,0
20,0
22,0
25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Air setting
Nozzle assembly setting
Scale
1.5 Model BFG1 H3
Blast tube length
mm
Blast tube
Dimension A mm
Flange
Dimension B ø
145 121,5 103
245 221,5 103
The above-mentioned measurements are maximum measurements. They
can vary, depending on which components are used.
1.5.1 Burner output/ Basic settings
25 - 100 kW

12 Bentone BFG1
General
4
3
5
1
6
2
10
16
9
15
14
13
7
8
22
11
12
1.6 Description

13Bentone BFG1
General
18
20
19
17
21
1.6.1 Components
1. Blast tube
2. Gas pressure switch
3. Connection multiblock
4. Ignition transformer
5. Motor
6. Capacitor
7. Multiblock
8. Air pressure switch
9. Test point for the air pressure switch on the low-pressure side
10. Air intake
11. Air regulation
12. Electric connection
13. Gas burner control
14. Reset button
15. Nozzle assembly adjustment
16. Screw for division of burner in front and rear part
17. Nozzle assembly
18. Brake plate
19. Ignition electrode
20. Ionisation electrode
21. Nozzle
22. Air flow indicator (indicates the air setting)

14 Bentone BFG1
General
Incorporated in the multiblock
2. INSTALLATION
2.1 Skeleton diagrams
1. Ball valve
2. Filter
3. Pressure regulator
4. Outlet for gas pressure measuring
5a. Gas pressure switch, min.
5b. Gas pressure switch, max.
6a. Main valve
6b. Safety valve
1)7. Leakage control
9. Air pressure switch
10. Gas burner control
Pos. 5b: Components not required acc. to EN 676.
1)Required above 1200 kW acc. to EN 676.

15Bentone BFG1
General
2.2 Delivery check
Check that all has been delivered and that the goods have not been
damaged during transport. If that is not the case, please notify the delivery
company. Transport damages should be reported to the forwarding agency.
2.3 Preparations for installation
Check that the measurements and capacity range of the burner are
compatible with the boiler. The power ratings on the type plate refer to the
min. and max. power of the burner.
2.4 Gas supply
For good operating safety, it is important that the gas supply system is
installed correctly.
Consider the following:
1. Check that the burner is approved for the gas quality of the installation.
If not, please contact the supplier.
2. Check that the gas components of the burner are approved for
indicated gas pressure.
3. The gas supply system should be installed in accordance with current
standards.
4. Pipe lines should be run so that service on boiler and burner is
facilitated.
5. Pipe lines should be run so that eventual contaminants cannot come
into contact with the gas components.
2.5 Electric connection
Before starting the electric installation, the main switch must be turned off.
If the boiler has a 7-pole and a 4-pole Eurostecker connector, these usually
fit directly to the burner. If not, use the connectors included.
(Refer to connection under Electric equipment)
2.6 Setting brake plate and air flow
Before the placing into service, the burner should be initially set according to
diagram.
(Refer to Basic settings). Note that it is only a question of a basic setting
which should be adjusted once the burner has been started.
!If an electric connection other than the one recommended by Enertech is used, a risk of damage and
injury can arise.

16 Bentone BFG1
General
E
F
X1
X2
2.7 Burner installation
2.7.1 Hole pattern
Check that the hole pattern on the boiler matches that of the flange.
(Refer to Technical data.)
2.7.2 Burner installation
1. Install the flange with gasket on the boiler.
2. Insulate between the blast tube and the boiler door to minimize heat
radiation.
3. Check the ignition electrode and ionisation electrode.
(Refer to Technical data).
4. Install the burner on the boiler and lock into the flange (E).
5. Install the gas line on the burner. Check that the O-ring has not been
damaged during installation, fasten with the screws (F).
6. Where support for the multiblock is included, this should be installed.
2.7.3 Gas connections
1. Check the gas pipe dimensions. (According to local regulations).
2. Connect the gas pipe to the gas flange of the multiblock.
3. A manual gas valve should be installed in the vicinity of the burner.
4. No mechanical stresses/forces should exist in the gas connection.
5. Check the sealing of the gas connections, including the multiblock and
flanges.
NOTE!
If the gas connection is via a hose, the support for the multiblock that is
supplied with the burner should be mounted (F). Install the support so that
the underneath of the multiblock rests on it.
2.7.4 Electric connection
If the boiler does not have a pre-wired connector, connect in the included
connector, X2 according to the wiring diagram.
1. Turn off the main switch.
2. Connect the Eurostecker X2 acc. to Alt. 1 - 3 (Refer to Electric equipment).
3. Install the Eurostecker X2 on the burner.
4. Turn on the main switch.

17Bentone BFG1
General
2.8 Control measures
2.8.1 Gas quality
Check that the combustion head is intended for the gas quality to be used
(refer to Technical data).
2.8.2 Bleeding
Bleeding of the gas pipe can be achieved by removing the screw on the test
nipple for the inlet pressure. Connect a plastic hose and lead out the gas into
nature. When the bleeding in completed,
don’t forget to install the screw in the test nipple again.
2.8.3 Function test
The electric function test can be done as follows:
When connecting to the mains, check that the phase and zero are not
switched. The gas tap should be closed. To prevent the gas pressure switch
from blocking, it should be bridged temporarily.
After the main switch has been turned on and the max. and control
thermostats have been set, the prepurging period lasts for 30-35 secs. After
this, the pre-ignition is started (0.5-2.5 secs. depending on the design of
the gas burner control). The ignition spark should then be able to operate
faultlessly at the required quantity of air for combustion. The gas valve is
energized and opens. After the end of the safety period (2-3 secs.), the gas
burner control blocks.
The solenoid valve and motor become de-energized. Remove the bridge
after completed testing.
Check that no safety functions are disconnected before placing the burner
into service.
2.8.4 Leakage testing
When leakage testing the gas fittings with test points between the valves, the
solenoid valve should be closed. A pressure gauge should be connected to
the test nipple Pa. The test pressure in the fittings should be 1.5 x max inlet
pressure or min. 150 mbar. If leakage is observed when measuring, localise
the leaking site with soapy water or leak detection spray. After sealing, leak
test the fittings again. After completed trimming, all joints, branching points
and outlets on the gas line should be tested for leaks.

18 Bentone BFG1
General
3. BASIC SETTINGS
3.1 Determination of gas quantity for
the system
Indicated values are default values.
For further details, please contact the gas supplier.
Lower heat value
Gas quality kWh/Nm3kJ/Nm3kcal/Nm3
Natural Gas G 20 9,45 34 056 8 147
Natural Gas G 25 8,06 29 046 6 948
Butane G 30 32,24 116 064 27 793
Propane G 31 24,44 87 984 21 069
Biogas 6,0 21 600 5 172
3.1.1 Example of how to calculate the gas quantity
(natural gas):
V°= Desired gas quantity [Nm3/h]
Q= Boiler output [kW]
Hμ=Gas heat value [kJ/Nm3] alt. [kWh/Nm3]
η= Boiler efficiency [%]
Calculation example:
Q=60 kW
Hμ=34 056 kJ/Nm3alt. 9.45 kWh/Nm3
η=90%
V°=Q x 3600 =60 x 3600 ≈7,05 Nm3/h
Hμ x(η/100) 34056 x (90/100)
V°=Q=60 ≈7,05 Nm3/h
Hμ x(η/100) 9,45 x (90/100)
If the height of the barometer (altitude), pressure and temperature of the gas
deviate from normal values, this should be taken into account as follows.
t = Temperature of gas at gas meter [°C]
B = Height of barometer [mbar]
Pμ=Pressure of gas at gas meter [mbar]
f = Calculated factor for multiplication with flow in Nm3to arrive at
actual gas flow
V = Actual gas flow [m3/h]
f = (273 + t) x1013,25
273 (B + Pμ)
Calculation example:
t = 15°C
B = 945 mbar
Pμ= 15,0 mbar
f = (273 + 15) x1013,25 ≈1,11
273 (945 + 15)
V = V°x f ⇒ V = 7.05 x 1.11 ≈ 7.83 m3/h gas flow to be read at the gas
meter

19Bentone BFG1
General
Ι
Π
3.1.2 Nozzle assembly adjustment
The burner is equipped with a control which changes the position of the brake
plate in the blast tube. This is used to set the correct pressure differential across
the combustion device and thereby get a good combustion without pulsations.
The setting to be used depends on the set effect and the overpressure in the
boiler. (For basic setting, see Technical data).
Setting brake plate
H1 och H2
• Smaller gap: turn the screw to the left
• Larger gap: turn the screw to the right
H3
• Smaller gap: turn the screw to the right
• Larger gap: turn the screw to the left
The setting of the brake plate position affects the air flow. Therefore, the air
must always be readjusted with the air regulation device of the burner.
3.1.3 Air intake adjustment
The air setting is very important to get good combustion with neither too
much nor too little air. The air flow for combustion is adjusted by turning the
air adjusting screw with an Allen key. How open the air control should be is
determined by the fired-in effect and overpressure in the boiler, as well as
other settings on the burner such as the position of the brake plate.
(For basic setting, see Technical data).
3.1.4 Air quantity setting procedure
The setting of the air control depends on how the screw, with which the
air adjustment is done, is installed. If the air intake is pointing downwards
as in Fig. Ι, a clockwise turn gives a decrease in the air flow and a counter-
clockwise turn an increase in the air flow.
If the air intake is pointing upwards as in Fig. Π, a clockwise adjustment
increases the air flow and a counter-clockwise adjustment decreases it.

20 Bentone BFG1
General
D
M
3.1.5 Inlet cone, air control
The air flow is also affected by the position of the intake cone. This rarely
needs adjustment, however, and should be maintained in the standard
position ”STD” for good operation and starts. (A cast-in arrow on the fan
housing indicates the position of the inlet cone. In addition to the scale on
the inlet cone casting, there is also a mark (M) indicating the factory setting.)
3.1.6 Rotation of air intake
The air intake can be rotated in order to fit the burner into different
environments. The intake can be rotated into various positions, not just the
ones shown to the left.
To rotate the air intake, loosen the three screws securing the air intake and
the two screws fastening the air pressure switch. Then rotate the air intake to
the desired position and tighten the screws.
The air intake position does somewhat affect the air flow through the burner.
The position giving the largest flow is with the air intake downwards.
3.1.7 Air duct
A hose connection via a air duct is available in three different dimensions, 48,
68 and 78 mm outer diameter ”D”. The air duct is installed on the air intake
at the place where the grid is installed in the standard design.

21Bentone BFG1
General
!
Warning
!When servicing/replacing components which affect the combustion, gas side leakage analysis and check
should be performed on the system.
4. BURNER SERVICE
4.1 Service
Service should be performed after approx. 3000 working hours, but no less
than once a year.
Only authorized personnel should perform the service.
Before any kind of service is performed, switch off the current with the line
breaker and turn off the gas supply.
Be careful: certain parts exposed after the separation of the burner can be
warmer than 60°C.
Be careful not to pinch or damage any electric cables or gas pipes during
installation or service.
4.1.1 Combustion device service
1. Switch off the main current, disconnect the Eurostecker from the
burner and turn off the gas.
2. Remove the gas pipe after ensuring that the gas is turned off.
3. Remove the burner from the burner flange. Pull out the burner.
Disconnect the blast tube and remove it.
4. If necessary, clean the brake plate and nozzle.
5. Check the ignition electrode and ionisation electrode. Replace if
necessary. (Refer to Technical data for setting of electrodes)
6. Install on the blast tube and fasten the burner on the burner flange.
7. Install the gas pipe.
8. Check the gas pipe for leakage.
9. Install the Eurostecker; switch on the main current and open the gas flow.
10. Start the burner and check the combustion.

22 Bentone BFG1
General
!When servicing/replacing components which affect the combustion, gas side leakage analysis and check
should be performed on the system.
4.1.2 Fan motor replacement
1. Switch off the main current, disconnect the Eurostecker from the
burner and turn off the gas.
2. Loosen the screw assembling the front piece of the burner and the fan
housing, but not more than that the fan housing can be removed from
the front piece. Disconnect the cables to the multiblock.
3. Remove the fan housing from the front piece and pull it backwards
until the cables to the ignition electrode and ionisation electrode can be
loosened.
4. Disconnect the electric bracket to the motor.
5. Loosen the screw holding the electrical bracket.
6. Remove the cable conduit for the ignition electrode and ionisation
electrode.
7. Loosen the screws (H) holding the motor flange, 5 pcs.
8. Lift off the motor.
9. Disconnect and remove the fan wheel.
10. Install the fan wheel on the new motor and tighten the locking screw.
The fan wheel should be installed in the bottom position against the
motor shaft.
11. Fit in the motor flange against the fan housing.
12. Assemble the motor flange and the fan housing. Tighten the screws
alternatively and not one at a time.
13. Place the cable conduit and the hose for the air pressure switch in
position.
14. Install the screws in the electrical bracket.
15. Connect the motor cable. Connect the ignition electrode and ionisation
electrode.
16. Assemble the fan housing and the front piece.
17. Install the Eurostecker; switch on the main current and open the gas flow.
18. Start the burner and check the combustion.