Buderus Logatop BE 1.3 Quick guide

Installation and Service
Instructions
Low Emissions Blue
Flame Oil Burner
Logatop BE 1.3 and 2.3
6 720 804 882 (2012/10) EN-US
For trained installers
Read carefully prior to
installation, maintenance
and service.
CAUTION!
Read this manual carefully before putting
this burner into operation.
WARNING!
This burner requires special training and
a specific tool kit. Do not attempt installa-
tion and/or service unless you are a Bud-
erus trained and certified technician
equipped with the proper tools and mea-
surement equipment.
Improper installation, adjustment, alter-
ation, service or maintenance can cause
property damage, personal injury, or loss
of life. Refer to this manual.
For assistance or additional information
consult a Buderus trained installer, ser-
vice agency or oil company.
CAUTION!
The operating manual is part of the docu-
mentation that is delivered to the installa-
tion's operator. Go through the
information in this manual with the own-
er/operator and make sure that he or she
is familiar with all the necessary operating
instructions.
Notice! This manual must be retained for future reference.

Table of Contents
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice.
2
1 General Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Codes and standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1.1 Certification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1.2 United States installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1.3 Canadian Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Regarding this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Notes structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 Important safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.5 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Technical data and scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Burnertypes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Burner tubes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.3 Settings and nozzle specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.4 Auto digital burner controller LMO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.5 Scope of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5 Conducting service work on the automated primary
burner controller LMO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.1 Program sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2 Operating automated burner controller LMO . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.3 Repairing faults in the automated burner controller LMO . . . . . . . . . . . . . . . . . 14
6 Initial burner start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.1 Checking electrical plug connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2 Establishing combustion air pipe connection . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.3 Checking and connecting oil lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.4 Bleeding oil line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.5 Starting the Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.6 Tightening burner door retaining screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.7 Adjusting the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.7.1 Recording measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.7.2 Measuring CO2-value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.7.3 Fine tuning the CO2-Value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.7.4 Measuring CO content (carbon monoxide). . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.7.5 Measuring chimney draft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.7.6 Run particle test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.8 Carrying out safety test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.9 Installation protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table of Contents
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice. 3
7 Burner start-up and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.1 Record and correct burner measurement values . . . . . . . . . . . . . . . . . . . . . . . 24
7.2 Inspecting burner hood and burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.3 Verify burner motor operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.4 Shutting off the burner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.5 Clean oil pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.6 Check fan housing for contamination and damage . . . . . . . . . . . . . . . . . . . . . . 26
7.6.1 Minor dust or contamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.6.2 More significant contamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.7 Checking ignition electrodes, mixing system, gasket, nozzle, and burner tube . . . . . 27
7.7.1 Check electrodes and replace as needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.7.2 Check the mixing system (replace as needed) . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.7.3 Replacement of oil nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.7.4 Checking the shut-off valve in the oil pre-heater . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.7.5 Inspecting the burner tube. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.7.6 Burner installation and checking of burner gasket. . . . . . . . . . . . . . . . . . . . . . . . . 30
7.8 Securing boiler door bolts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.9 Check electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.10 Conducting the safety test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.11 Inspections and maintenance protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8 Additional service tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.1 Measurement of the flame sensor current. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.2 Verifying tightness of fireside heating surfaces. . . . . . . . . . . . . . . . . . . . . . . . . 35
8.2.1 Establishing the upper limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.2.2 Performing tests in the combustion chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9 Layout of oil supply system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.1 Installation of the oil filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.2 Sizing the oil supply lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9.3 Testing for oil line vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9.4 Testing Integrity of oil supply line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
9.5 Use of vacuum valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
10 Troubleshooting burner failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
10.1 Functional diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
10.2 Burner failure - reasons and solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
11 Spare part listing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
12 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

General Instructions
1
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice.
4
1 General Instructions
1.1 Codes and standards
1.1.1 Certification
BE- burners are CSA listed for the U.S. and Canada,
certified to comply with ANSI/UL 296 and CSA B140.2.1,
for use with #2 heating oil (per standard ASTM D396).
Burner labels list compliance, where required, with spe-
cial local, state or provincial approvals.
1.1.2 United States installations
Burner/appliance installations in the United States must
comply with the latest revisions of NFPA 31 (Standard
for the Installation of Oil-Burning Equipment), ANSI/NF-
PA 70 (National Electrical Code), and all applicable local
codes. In the commonwealth of Massachusetts, 527
CMR 31.00 requires owners of all residential properties
to install and maintain carbon monoxide (CO) alarms.
1.1.3 Canadian Installations
Burner/appliance installations in Canada must comply
with the latest revision of CSA B139 (Installation Code
for Oil Burning Equipment), CSA standard C22, Part 1
(Canadian Electrical Code), and all applicable local
codes.
NOTICE
It is the installer’s and service personnel’s
responsibility to follow all applicable na-
tional and local codes and regulations.
Country All Countries
Fuel #2 Fuel Oil ASTM D396-05 Type 2
Comments No other fuel may be used with this burner.
Burner requires annual service and cleaning. Verify each time that the complete heating system is in working
order. Defects must be remedied immediately.
Table 1 Permitted fuel types
NOTICE
Install this burner in accordance with all lo-
cal codes and authorities having jurisdic-
tion. Regulations of these authorities take
precedence over the general instructions
provided in this manual.

Safety 2
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice. 5
2 Safety
2.1 Regarding this manual
This document contains important information regarding
safe and proper installation, operation, maintenance
and troubleshooting of the blue flame burner Logatop
BE 1.3 and 2.3.
The Installation and Maintenance Instructions are direct-
ed at the installing contractor who has professional
knowledge of fuel oil powered heating boilers.
The Logatop BE 1.3 and 2.3 blue burners are referred as
"burners" in this document.
For your own safety, observe these instructions.
2.2 Intended use
The burner must be installed in the Logano G125 BE
boiler series.
The fully automatic burner complies with the specifica-
tions of UL-296 (burner) and UL-726 (boiler).
The burner is heat-tested at the factory and preset for
the specified nominal boiler output (see label on burner).
This means that it is only necessary to verify the burner
settings at initial start-up and adjust for the local condi-
tions if necessary.
2.3 Notes structure
Two danger levels are identified and signified by the fol-
lowing terms:
Additional symbols for identification of dangers and user
instructions:
WARNING!
DANGER TO LIFE
Identifies possible dangers emanating
from a product, which might lead to serious
injury or death if appropriate care is not tak-
en.
CAUTION!
DANGER OF INJURY/SYSTEM
DAMAGE
Identifies potentially dangerous situations,
which might lead to medium or slight inju-
ries or material losses.
WARNING!
DANGER TO LIFE
from electric shock.
NOTICE
Tip for optimum use of equipment and ad-
justment as well as useful information.

Safety
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Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice.
6
2.4 Important safety information
If required by applicable regulations, the heating system
has to comply with ANSI/ASME CSD-1 (Standard for
Controls and Safety Devices for Automatically Fired
Boilers).
Carbon monoxide detectors must be installed if required
by applicable regulations.
WARNING!
DANGER TO LIFE
from poisonous gases.
Insufficient combustion air can cause dan-
gerous flue gas leaks.
zThe ventilation and exhaust openings
must never be plugged. The cross-sec-
tion of the ventilation and exhaust
openings must comply with the design
specifications at all times.
zIf the ventilation and exhaust openings
do not comply with the specifications,
the heating system must never be oper-
ated.
zNotify operator and building owner of
the defect in writing.
WARNING!
FIRE DANGER
from flammable material or liquids.
zMake sure that there is no combustible
material or liquids in the boiler room be-
fore starting work.
WARNING!
FIRE DANGER
from unintended use.
zThe burner may only be operated while
installed in a boiler.
CAUTION!
BURNER DAMAGE
from contaminated combustion air.
zPrevent excessive dust levels.
CAUTION!
SYSTEM DAMAGE
from blocked oil filters.
Filters that clog up immediately after filling
a tank may indicate that residue from the
bottom was stirred up.
zIn such cases it is recommended to
shut down the heating system while fill-
ing the tank and wait several hours be-
fore restarting the system. Instruct the
operator and building owners accord-
ingly.
CAUTION!
SYSTEM DAMAGE
From improper installation
zAlways follow state of the art construc-
tion techniques for installation and
maintenance, and observe all applica-
ble codes and regulations.
WARNING!
DANGER TO LIFE
from electrical shock.
zDo not work on electrical components
unless you have the required qualifica-
tion.
zBefore you start working, disconnect
the heating system from electrical pow-
er by shutting off the emergency shutoff
switch, or the heating system circuit
breaker.
zIt is not sufficient to simply shut off the
controls.
zObserve all applicable codes and regu-
lations.
CAUTION!
DEVICE DAMAGE
from incorrect repair.
zDo not attempt to repair parts that have
built in safety features. Always replace
the part.
NOTICE
zOnly use original Buderus spare parts.
Buderus does not accept responsibility for
damage caused by third party spare parts.

Safety 2
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice. 7
2.5 Disposal
zDispose of packaging material in an environmentally
responsible manner.
zComponents of the heating system must be disposed
of according to local regulations.
WARNING!
DANGER TO LIFE
from neglecting ones own safety in case of
emergency.
zSafety first. Never risk your life.
CAUTION!
SYSTEM DAMAGE
From insufficient maintenance.
zPerform maintenance annually. Check
the complete heating system for de-
fects and malfunction.
zMitigate defects immediately to avoid
larger scale system damage.

Product description
3
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice.
8
3 Product description
The main components of the burner are:
–Oil pump with solenoid valve and oil connection hos-
es (Fig. 1, Item 1)
–Burner motor (Fig. 1, Item 2)
–Burner tube (Fig. 1, Item 3)
–Automated burner controller with reset button (Fig. 1,
Item 5)
–Flame sensor (Fig. 1, Item 6)
–Blower (Fig. 1, Item 7)
The burner (Fig. 1) is directly connected to the heating
system control using the provided burner cable (7-pin
burner plug Fig. 3, Item 4).
The burner is operated and monitored by the fully auto-
mated primary burner controller.
–After a demand for heat has been generated by the
heating system control, the burner is switched on and
the oil in the nozzle is heated to approximately 150°
F. From a cold start the process may take a maxi-
mum of three minutes.
–After the oil has been heated, the fan and pump are
energized, the solenoid valve is opened, and power
supplied to the igniter.
–A blue flame is visible immediately after ignition.
–This combustion system vaporizes the oil using recir-
culation of hot gases, mixing them homogenously
with the combustion air and burning them inside the
burner tube.
–The flame sensor must send a flame signal before
the safety period expires; otherwise the system will
be switched off. (see Chapter 6.8 „Carrying out safe-
ty test“, page 22)
Fig. 1 Logatop BE 1.3 and 2.3 Burner
Item 1: Oil pump with solenoid valve and oil connection
hoses
Item 2: Burner motor
Item 3: Burner tube
Item 4: Burner connection for 7-pin burner cable
Item 5: Automated burner controller with reset button
Item 6: Flame sensor
Item 7: Blower
1
2
3
6
7
5
4

Technical data and scope of delivery 4
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice. 9
4 Technical data and scope of delivery
The technical data provide information on the output
profile of the burner.
4.1 Burnertypes
Fig. 2 Mixing system – Ø A, B, C
Item 1: Stamp
Fig. 3 Mixing system – dimension „X“ Fig. 4 Ignition electrode (dimension in
inches)
1
Mixing system
Boiler Burner Stamp 4A4B4C X
in inches in inches in inches in inches
Logano G125 BE 1.3 – 21 1.1 – 21 1 3/32 15/32 15/64 5/64
BE 2.3 – 28 1.1–28 1 9/32 31/64 9/32 5/64
BE 2.3 – 34 2.1 – 34 1 9/32 31/64 5/16 5/64
Table 2 Technical data– mixing system and ignition electrode

Technical data and scope of delivery
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Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice.
10
4.2 Burner tubes
4.3 Settings and nozzle specification
Atmospheric combustion
Fig. 5 Dimensions of burner tube
Stamp
Burner Logatop Stamp Tube n x 4A *
in inch
n x 4B *
in inch
LA
in inch
LB
in inch
BE 1.3 - 21 63028636 D83/L224/4,3/2,6 12 x 0.17 6 x 0.1 0.71 3
BE 2.3 - 28 63028637 D83/L224/5,9/4,8 12 x 0.17 6 x 0.1 0.71 3
BE 2.3 - 34 63028638 D83/L224/7,0/5,7 12 x 0.17 6 x 0.1 0.71 3
Table 3 Ceramic burner tubes and their dimensions
* Tolerances of all measurements are -1/16“
NOTICE
Specification is based on an intake air tem-
perature of 68 °F and an installation below
1650 ft. elevation (see Chapter 6.7.2 „Mea-
suring CO2-value“, page 19).
Settings, nozzle installation1G125 BE atmospheric combustion
Burner type BE1.3–21 BE2.3–28 BE2.3–34
Output MBtu/h 72 96 116
Mixing system 1.1–21 1.1–28 2.1–34
Nozzle1Danfoss
0.45 gph
80° HFD
Danfoss
0.55 gph
60° HFD
Danfoss
0.65 gph
80° HFD
Oil pressure psi 189 – 290 218 – 334 218 – 334
Oil gph 0.58 0.76 0.95
Air intake setting (estimated) 4.5 5.5 5.5
Static air pressure
W. C.
[inch
H2O]
3.8–4.4 3.8–4.4 3.8–4.5
Combustion chamber pressure 0–0.15 0–0.16 0–0.24
Min draft (required draft)20 0 0
Available draft 0.12 0.12 0.12
CO2-without hose connected %13.0 – 13.5 13.0 – 13.5 13.0 – 13.5
CO2-with hose connected %13.5 – 14.0 13.5 – 14.0 13.5 – 14.0
CO-Value ppm <50 <50 <50
Table 4 Settings and nozzle installation for G125 BE with atmospheric combustion
1Recommended: use only the nozzle types specified here. 2In chimney systems with negative pressure.

Technical data and scope of delivery 4
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice. 11
Sealed combustion
4.4 Auto digital burner controller LMO
4.5 Scope of Delivery
zVerify that the packaging is not damaged on arrival.
zVerify that the delivery is complete.
Settings, nozzle installation1G125 BE sealed combustion
Burner type BE 1.3 – 21 BE 2.3 – 28 BE 2.3 – 34
Output MBtu/h 72 96 116
Mixing system 1.1 – 21 1.1 – 28 2.1 – 34
Nozzle1Danfoss
0.45 gph
80° HFD
Danfoss
0.55 gph
60° HFD
Danfoss
0.65 gph
80° HFD
Oil pressure psi 189 –290 218 –334 218 –334
Oil gph 0.58 0.76 0.95
Air intake setting 4.5 5.5 5.5
Static air pressure
W. C.
[inch
H2O]
3.8–4.4 3.8–4.4 3.8–4.5
Combustion chamber pressure 0 – 0.15 0 – 0.16 0 – 0.24
Min draft (required draft)2000
Available draft 0.12 0.12 0.12
CO2-without hood %Fig. 16, page 20
CO2-with hood %Fig. 16, page 20
CO-value ppm <50 <50 <50
Table 5 Settings and nozzle installation for G125 BE with sealed combustion
1Recommended: use only the nozzle types specified here.
2In chimney systems with negative pressure.
LMO
Supply voltage V, AC 120
Frequency Hz 60
External fuse A6.3
Wattage VA 12
Weight lbs ca. 0.5
Protection IP 40
Table 6 Technical specifications LMO
NOTICE
The burner is supplied as a complete unit
with the boiler, the burner door, the panels
and the front boiler cover.

Conducting service work on the automated primary burner controller LMO
5
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice.12
5 Conducting service work on the automated primary burner
controller LMO
The LMO operates and monitors the burner at all times.
The flame is monitored by a blue-flame sensor. The
LMO receives a heat demand from the heating system
control or boiler Aquasmart control.
In case of a fault the reset button (Fig. 6, Item 1) on the
LMO allows troubleshooting (see Chapter 5.3 „Repair-
ing faults in the automated burner controller LMO“,
page 14).
5.1 Program sequence
Fig. 6 Automated burner controller LMO
Item 1: Three color indicator light and Reset button
Item 2: Latch to release
1
2
WARNUNG!
DANGER TO LIFE
from electric shock.
zNever open the automated burner con-
troller LMO and never attempt repair or
modifcations.
zNever operate the unit after the LMO
has been dropped or taken a hit. Safety
functions may be affected even if there
is no visible damage.
Fig. 7 Automated burner controller program sequence
= control signals
= required input signals
= allowed input signals
yellow yellow
gleaming green gleaming
Legend:
RTemperature and pressure control
WTemperature and pressure monitor
SB Safety limiter
OH Oil pre-heater
OW : Oil pre-heater activation
M: Burner motor
BV1 : Solenoid valve 1
Z: Ignition transformer
FS : Flame signal
LED : 3-color indicator light
tw : Wait time
t1’ : Ventilation time
t1 : Pre-ventilation time
t3 : Pre-ignition time
t3n : Post-ignition time
TSA : Start-up safety time
A´ : Start of operation in burner with "OH"
A: Start of operation in burner without "OH"
B: Time of flame formation
C: Operating position
D: Control shutoff by "R"

Conducting service work on the automated primary burner controller LMO 5
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice. 13
5.2 Operating automated burner
controller LMO
The three color light and reset button is the interface for
unlocking the burner, and for activating and deactivating
diagnosis mode. The multicolor LED (yellow, green, red)
indicates the current operating status.
Operating status Color code Color
Oil preheater heating, wait time Yellow
Preventilation, ignition on yellow-off
Operation, flame signal OK green
Operation, flame signal weak green-off
Wait time before fault red-off
Fault, alarm (see page 14) red
Foreign light at burner start green-red
Low voltage yellow-red
Fault code output (see Table 8, page 14) The LED flashes 2 –10 times red-off
Interface-Diagnosis (see Table 8, page 14) red flickering light
Table 7 Display of burner operating status by multicolor LED
... = permanent
= off
= red
= yellow
= green

Conducting service work on the automated primary burner controller LMO
5
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice.14
5.3 Repairing faults in the automated
burner controller LMO
After a fault shut off the burner, the LED on the automat-
ed burner controller LMO will light red. The faults can be
identified by observing a flash code.
Proceed as follows:
zPress reset button for 5 seconds until the LED briefly
flashes yellow.
zObserve the flash code and find the type of the fault
in the table (Table 8).
zPress reset button for one second to stop the diagno-
sis and to unlock the burner.
Flash code Possible cause Correction
2 x flash no flame formed during safety time Troubleshooting (see Chapter 10 „Troubleshooting burner failures“,
page 39).
4 x flash Stray light at burner start
7 x flash Flame goes out during operation
8 x flash oil pre-heater time monitoring First check electrical connections.
Next step replace oil pre-heater.
10 x flash Internal error Unlock LMO
Wiring fault (Press reset button for one second).
Next step, replace LMO.
LED "flickers"
RED
Interface mode is active Activate interface diagnosis by pressing the reset button for five seconds.
If the diagnosis has been accidentally activated (LED "flickers" red), it can
be switched off by pressing the reset button again for five seconds. It sig-
nals the mode change by a yellow flash.
Table 8 Diagnosing faults
NOTICE
The control outputs are deactivated and
the burner remains off while diagnosing
faults.

Initial burner start-up 6
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice. 15
6 Initial burner start-up
This chapter describes how to start the burner for the
first time. The burner has been factory-fired, and set up
at the factory for room air independent operation. Verify
if the factory settings are acceptable for the installation,
and only adjust if required due to system specification.
zThen complete the inspection log (see Chapter 6.9
„Installation protocol“, page 23).
6.1 Checking electrical plug connections
zVerify that all electrical plug connections are correctly
installed.
6.2 Establishing combustion air pipe connection
In sealed combustion installations the flexible hose is
connected to the air intake in the blower housing.
zAttach the flexible hose using the supplied hose
clamp.
6.3 Checking and connecting oil lines
Before connecting the oil supply to the burner, check
that all oil lines and the oil filter are clean and tight.
zInspect the oil lines including all components and
clean or replace if necessary.
zCheck oil filter, replace if previously used.
zCheck oil supply system (see Chapter 9 „Layout of oil
supply system“, page 36).
zConnect burner oil hoses to a Tigerloop (supplied).
Fig. 8 Oil pump – Suntec
Item 1: Oil suction line (red stripe)
Item 2: Return line (blue stripe)
21
NOTICE
For safety reasons the burner is supplied
in "lock out status".
Fig. 9 Connecting flexible hose to burner
Item 1: Supplied hose clamp
Item 2: Flexible combustion air hose
2
1
NOTICE
Be careful not to reverse the suction and
return lines (Fig. 8).

Initial burner start-up
6
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice.16
6.4 Bleeding oil line
The oil supply system must be checked to ensure that
the burner will operate properly (see Chapter 9 „Layout
of oil supply system“, page 36). Check the suction resis-
tance and inspect for leaks, particularly in retrofit sys-
tems.
There are two methods for bleeding the oil line:
–Oil suction pump – this will prevent damage to the oil
pump caused by running dry.
–Burner tester (Fig. 11, Item 1; Accessory) – if the
burner oil pump is to supply the oil.
The procedure for bleeding the oil line with the burner
tester (Fig. 11, Item 1) is described below.
zDisconnect the heating system from the electric pow-
er.
zRemove automated burner controller (Fig. 10,
Item 2) from its base.
zPlug burner tester (Fig. 11, Item 1) into the base.
zSwitch ON power to the heating system.
zSwitch on control mode switch. The LED (red) lights
(Fig. 11, Item 2).
zSwitch on burner tester with the mode switch
(Fig. 11, Item 5) . Both LEDs (red and green) light
(Fig. 11, Item 2 and 3).
zSwitch on oil preheater (Fig. 11, Item 4) switch.
zCheck that the oil in the Tigerloop reservoir (Fig. 10,
Item 4) is free from bubbles.
Fig. 10 Oil filter, vacuum meter and transparent hose
Item 1: Oil suction line
Item 2: Automated burner controller
Item 3: Vacuum meter
Item 4: Tigerloop
Item 5: Oil return line
1
2
3
4
5
Fig. 11 Bleeding oil line with burner tester
Item 1: Burner tester
Item 2: LED (red)
Item 3: LED (green)
Item 4: Switch for running the oil preheater
Item 5: Burner tester switch
63044451-03.1K
3
2
4
1
5
CAUTION!
SYSTEM DAMAGE
from a defective oil pump.
zNever run the pump without oil longer
than five minutes.

Initial burner start-up 6
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice. 17
6.5 Starting the Burner
zDisconnect your heating system from electric power.
zClose oil valve (Fig. 10, Item 5, page 16) and re-
move transparent hose (Fig. 10, Item 4, page 16)
and vacuum meter (Fig. 10, Item 3,page 16).
zScrew oil suction line (Fig. 10, Item 1, page 16) to
the filter connection of the Tigerloop (Fig. 10, Item 5,
page 16).
zOpen oil valve at oil filter (Fig. 10, Item 5, page 16).
zSwitch ON power to the heating system.
zPress and hold reset button (Fig. 12, Item 1) for at
least one second (switch on). The burner will be reset
to start or operating mode after about five seconds
(see Table 7, „Display of burner operating status by
multicolor LED“, page 13).
zCheck oil connections for leaks.
If the burner does not start:
zPress reset button (Fig. 12, Item 1).
If the burner does not start after pressing the reset but-
ton three (3) times, the cause of the problem must be
found with the assistance of the functional diagram (see
Chapter 10.1 „Functional diagram“, page 39).
Fig. 12 Reset button and indicator light
Item 1: Reset button
Item 2: Automated burner controller
1
2
CAUTION!
SYSTEM DAMAGE
from frequent resets.
If the burner is reset more than three times
in quick succession (within three minutes)
without consequential ignition, the burner
ignition transformer may be damaged.
zBleed the system using an external oil
pump, not by repeatedly pressing the
reset button (Fig. 12, Item 1).
NOTICE
The burner is in fault setting when deliv-
ered (the reset button LED is permanently
red). The burner must first be reset.
NOTICE
Before every start (switch-on) the automat-
ic burner controls runs through a self-test
(about five seconds).

Initial burner start-up
6
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice.18
6.6 Tightening burner door retaining screws
The screws fastening the burner door must be tightened
to approx. 8 ft lbs when hot to prevent excess air from
entering the combustion chamber.
zTighten the burner door retaining screws.
6.7 Adjusting the burner
6.7.1 Recording measured values
The measurements are taken in the exhaust pipe
(Fig. 13).
The measurement port (coupling; Fig. 13, Item 2)
should be located distance A (approx. 2 × the diameter
of exhaust pipe D) from the boiler rear section (Fig. 13).
If the exhaust system is connected to an elbow immedi-
ately after the boiler, the measurement must be made
before the elbow.
zMake sure that the exhaust pipe is properly sealed
between the exhaust connection and measuring
point, because additional air will falsify the measure-
ment.
Fig. 13 Recording measured values
Item 1: Exhaust pipe sealing collar
Item 2: Measurement aperture (coupling)
Item 3: Probe
3
21

Initial burner start-up 6
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice. 19
6.7.2 Measuring CO2-value
The burner has been factory-fired, and set up at the fac-
tory for room air independent operation. Combustion air
brought in directly from outside can result in large tem-
perature extremes. This requires adjusting the CO2on
the day of initial startup.
Measure CO2with the boiler at approx. 140°F after the
burner ran for at least 10 minutes or after the boiler has
reached steady state condition.
zInsert temperature probe in the combustion air hose
near the back of the boiler and measure combustion
air temperature while the burner is running.
zInsert combustion analyzer probe (Fig. 13, Item 4) in
flue gas pipe and position near center (highest tem-
perature).
zCompare measurements with Fig. 15.
Example:
Combustion air: 77 °F,
with combustion air piped in from outside.
Set CO2-value to 14.1% ±0.2 %.
Fig. 14 Combustion air hose
2
1
Fig. 15 CO2-adjustment based on combustion air from outdoors with separate pipes for combustion air and exhaust
(valid with or without burner hood installed)
Combustion air temperature near back of boiler in °F
Wall termination
CO2- value in %

Initial burner start-up
6
Buderus Blue Flame Burner BE 1.3 - 2.3 - Specifications subject to change without notice.20
6.7.3 Fine tuning the CO2-Value
Adjusting the oil pump pressure
By turning the adjustment screw (Fig. 16, Item 1) slight-
ly, you can fine tune the oil pressure and consequentially
the CO2-Value.
zScrew the oil pressure gauge to the oil pump (con-
nection “P”).
If the specified CO2content is not reached within the lim-
its of the oil pressure, the gasket on the combustion side
must be checked (see Chapter 8.2 „Verifying tightness
of fireside heating surfaces“, page 35).
Adjusting combustion air supply
If you are unable to dial in the CO2-value by adjusting
the oil pressure, because the oil pressure would end up
outside of range (Tab. 9), you will need to adjust the
amount of combustion air manually.
zLoosen the screw on the blower housing (Fig. 17,
Item 1).
zSlightly adjust the static plenum pressure by moving
the air lever along the scale.
zAdjust the oil pressure as needed (see „Adjusting the
oil pump pressure“, page 20), until the CO2-value
reaches the target. If this is not possible, it may be
necessary to replace the oil nozzle.
Fig. 16 Adjusting oil pressure - Suntec pump
1
Raise pressure
Rotate clockwise = Raise CO2
Reduce pressure
Rotate counter-clock-
wise
= Lower CO2
Fig. 17 Adjusting air volume
Item 1: Screw
Item 2: Scale
Item 3: Arrow
Item 4: Adjustment lever
1
2
1
3
4
NOTICE
Lower numbers on the scale equal a
higher air pressure as shown by the ar-
row in Fig. 17.
Scale Air volume CO2-content
0 maximum minimum
6minimum maximum
Tab. 9 Adjusting the air volume