Buderus Logano G125 BE User manual

Users Manual Low Emissions and
High Efficiency Oil
Boiler
Logano G125 BE US/CA
7 747 010 551 05/2007 US/CA
For the Owner
Please read carefully before
operating equipment.

Table of Contents
Logano G125 BE - Specifications subject to change without notice.
2
1 For your Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Regarding this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Proper Application Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Description of Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4 Observe the following Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.4.1 Directions regarding Boiler Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Product Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Proper Application Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Operation of the Heating System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Prior to System Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Testing of System Pressure, Filling and Venting of System . . . . . . . . . . . . . . . . . 5
3.2.1 When should you check the system pressure? . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2.2 Testing system pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2.3 Filling the System and Air Bleeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.3 Start-up using the Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4 Shutting down the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.5 Emergency Situations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.6 Important Operational Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.7 Importance of regular maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Trouble Shooting of your Heating System. . . . . . . . . . . . . . . . . . . . . . . . 10
Operating Pressure
Only use this fuel type:
#2 Fuel oil ASTM D396-05 Type 2
Maximum Operating Pressure
(Standard = 30 psi) ______________ psi
Maximum Operating Pressure
(Standard = 30 psi) ______________ psi
Stamp/Date/Signature
Manufacturer’s address: Never use gasoline, kerosine, crank case oil, or
other fuels unless specified above!
BBT North America Corporation
50 Wentworth Avenue
Londonderry, New Hampshire 03053, USA
Phone: [phone]
Internet: www.buderus.net

For your Safety 1
Logano G125 BE - Specifications subject to change without notice. 3
1 For your Safety
1.1 Regarding this Manual
This manual contains important information regarding
safe and proper operation of your boiler.
The high tech G125BE oil boiler is designed as a hot wa-
ter heating boiler.
1.2 Proper Application Description
The boiler is certified as a hot water heating boiler for
use in space heating and domestic hot water heating us-
ing an indirect fired hot water tank for single and multiple
family homes.
1.3 Description of Symbols
The following symbols are displayed in this manual:
ÎCross reference
Cross references a particular point or another document
with an arrow Î.
1.4 Observe the following Guidelines
You will learn to properly operate your heating system
when:
–Follow the instructions of your heating contractor dur-
ing the start-up of the system.
–Read these operating instructions carefully.
Perform only those operations to your heating system
that are described in this manual.
1.4.1 Directions regarding Boiler Room
WARNING!
DANGER TO LIFE
Denotes a potential danger that can lead
to bodily injury or death.
CAUTION!
PERSONAL INJURY/
SYSTEM DAMAGE
Denotes a potentially dangerous situation
that can lead to bodily injury or property
damage.
NOTICE
Denotes a suggestion for optimum use
and other useful information.
WARNING!
DANGER TO LIFE
from unqualified personnel.
zPlease make sure that the installation,
start-up and annual maintenance are
performed only by a heating contractor
or service company. Any electrical or
fuel carrying parts require work by a
certified individual with the proper
qualifications.
WARNING!
DANGER TO LIFE
from flue gas poisoning.
Insufficient combustion and ventilation air
during room air operation of the equip-
ment can lead to dangerous flue gases.
zMake sure that the ventilation and air
supply and exhaust openings are al-
ways fully open and never plugged.
zKeep door(s) to the boiler room always
closed.
zProtect the boiler room and specifically
the ventilation and intake air openings
from animals by means of louvers
and/or screens.
zIf the above issues are not resolved,
the boiler must not be operated.
WARNING!
FIRE DANGER
from flammable or combustible materials.
zMake sure that no flammable or com-
bustible materials are stored near the
boiler.

Product Description
2
Logano G125 BE - Änderungen aufgrund technischer Verbesserungen vorbehalten.
4
2 Product Description
2.1 Proper Application Description
The boiler can only be used as a hot water heating boiler
for space heating, and domestic hot water heating using
an indirect fired hot water tank for single and multiple
family homes.
2.2 Product Description
The boiler is a low temperature oil fired model designed
for maximum efficiency.
The boiler consists of the following components:
–Control System (Logamatic control or Honeywell
aquastat)
–Boiler jacket panels
–Cast Iron Boiler block with Insulation
–Burner cover
The Logamatic control system monitors and controls the
burner operation as well as several main components of
the heating system.
As an alternative, the boiler can also be equipped with a
Honeywell aquastat.
The boiler jacket serves as protection, insulation and
noise control.
The cast iron boiler block transfers the heat produced by
the burner to the boiler water. The insulation minimizes
heat loss.
Fig. 1 G125 BE US/CA High Tech Oil Boiler
1Control system (optional)
2Boiler jacket panels
3Cast Iron Boiler block with insulation
4Burner cover
5Burner
7 747 010 678-01.1RS
1
2
3
45

Operation of the Heating System 3
Logano G125 BE - Specifications subject to change without notice. 5
3 Operation of the Heating System
3.1 Prior to System Start-up
Check the following before engaging the system:
–That the system pressure is sufficient.
–That the main fuel supply valve is opened.
–That the boiler emergency switch is ON.
3.2 Testing of System Pressure, Filling and Venting of System
3.2.1 When should you check the system
pressure?
It is recommended to check the system pressure on
newly installed systems frequently during the first week
of operation, as the volume might be slightly reduced
due to air pockets being eliminated from the system.
zCheck the system pressure of a new system daily,
and add boiler water when needed. Possibly vent the
system at radiators if applicable.
zLater check the system pressure monthly, add boiler
water when needed. Vent the system at radiators if
applicable.
3.2.2 Testing system pressure
The system pressure should be a minimum of 12 to 15
psi.
The target value for the system can be read on
ÎPage 2 (To be filled out by the installing contractor).
zThe actual pressure and temperature can be read at
the pressure/temperature gauge.
zWhen the system pressure drops below 12 to 15 psi,
adding water to the boiler system is recommended.
3.2.3 Filling the System and Air Bleeding
Please ask your heating contractor or service company
to demonstrate to you how to add boiler water to the sys-
tem and how to vent the system.
Fig. 2 Pressure/temperature gauge (located at the rear of
the boiler).
CAUTION!
HEALTH DANGER
from contamination of drinking water with
boiler water.
zPlease request that your heating con-
tractor or service company shows you
how to properly add water to the boiler
system.

Operation of the Heating System
3
Logano G125 BE - Specifications subject to change without notice.
6
zFill the heating system slowly via the automatic feed
valve. Pay close attention to the pressure gauge.
zStop adding fill water, when the desired pressure is
reached.
zVent the system via radiator air bleeding valves
where available.
zWhen the system pressure drops following the air
venting, add additional water.
CAUTION!
SYSTEM DAMAGE
due to temperature swings.
When the water is added to a hot boiler,
thermal stresses can occur.
zAdd fill water to the boiler when the
boiler is cold (The boiler temperature
must not exceed 100 °F).
CAUTION!
SYSTEM DAMAGE
due to frequent filling.
When you have to add water on a regular
basis, the system might get damaged due
to lime stone build-up and corrosion.
zCheck with your heating contractor if
the boiler water requires treatment.
zPlease inform your heating contractor
if you frequently need to add water to
the boiler.

Operation of the Heating System 3
Logano G125 BE - Specifications subject to change without notice. 7
3.3 Start-up using the Control System
Turn the system on using your control panel. The burner
will automatically activate when you turn on the control
panel. The burner can also be started up from the con-
trol panel. Further information can be obtained from the
operating manual of the control panel or burner.
zSet the adjustable boiler aquastat to position “AUT”
(ON).
zTurn the main switch to “I” (ON).
Heating System Operation with Aquastat
zTurn boiler switch to “ON” position. This turns the
system on.
3.4 Shutting down the System
With Buderus control (Fig. 3)
zTurn main control switch to “OFF” (Position “O”).
This shuts off the boiler and all operating compo-
nents.
With Aquastat (Fig. 4)
zShut off boiler switch (Position “OFF”). This shuts off
the entire heating system.
zShut off oil supply by closing the main fuel valve.
Fig. 3 Turning on the control panel (Logamatic 2000)
1Adjustable Boiler Aquastat
2Main Switch
I0
2
1
NOTICE
zYou will find information regarding op-
eration, e.g. setting of temperatures, in
the Îdocumentation of the respec-
tive controls.
Fig. 4 Heating system operation with aquastat using main
service switch (No Buderus control panel).
CAUTION!
SYSTEM DAMAGE
from freezing.
When the heating system is not in opera-
tion, the system can freeze up.
zKeep your heating system in good op-
erating order.
zIf the system is not operational and
temperatures in the building can get
close to freezing, protect the system
from freezing by draining the heating
and DHW pipes at their lowest point.

Operation of the Heating System
3
Logano G125 BE - Specifications subject to change without notice.
8
3.5 Emergency Situations
In case of an emergency, such as a fire, proceed as fol-
lows:
zShut off oil supply using main shut-off valve.
zShut off the system electrically with the main service
switch or by disengaging the heating system circuit
breaker.
3.6 Important Operational Information
The proper fuel
For trouble free operation, the heating system requires
the correct fuel and fuel quality.
Use of unlisted fuel can lead to service calls, can cause
damage to burner, boiler and the venting system and
may void Buderus’ warranty.
Boiler Room
Use only the following fuel
#2 Fuel oil ASTM D396-05 Type 2
Stamp/Date/Signature
CAUTION!
SYSTEM DAMAGE
from incorrect fuel.
zUse only listed fuel.
CAUTION!
BOILER DAMAGE
due to contaminated combustion air.
zNever use or store cleaning agents
containing chlorine or hydro-carbons
(eg. Spray cans, solvents, paints,
cleaning agents) in the boiler room.
zAvoid dust generation and build-up.
CAUTION!
BOILER DAMAGE
from flooding.
zIn case of flood conditions, disconnect
the boiler electrically and fuel wise
(ÎChapter 3.4, page 7).
zHave your contractor check your sys-
tem, following flood conditions.
zComponents, such as valves, control
and electrical parts that have been in
contact with water must be replaced
by a heating contractor.

Operation of the Heating System 3
Logano G125 BE - Specifications subject to change without notice. 9
3.7 Importance of regular maintenance
Heating systems require annual maintenance for the fol-
lowing reasons:
–To maintain high efficiency level and ensure efficient
system operation (low energy use).
–To ensure high reliability of the system.
–To maintain low emissions.
CAUTION!
SYSTEM DAMAGE
due to incomplete cleaning or unqualified
maintenance.
zMake sure to have your heating sys-
tem serviced, cleaned and maintained
annually by a certified contractor or
heating company.
zBuderus recommends signing up for a
service agreement for annual mainte-
nance.

Trouble Shooting of your Heating System
4
Logano G125 BE - Specifications subject to change without notice.
10
4 Trouble Shooting of your Heating System
Two types of failures can be identified:
–Burner failures and
–Failures of the control system and heating system.
The reset light will be lit on the burner to indicate a burn-
er failure (Îrefer to Burner Manual). The failure can
typically be resolved by pressing the reset button on the
burner.
Failures of the control system or heating system are typ-
ically shown on the control’s display, provided the boiler
is equipped with a digital control panel. Further informa-
tion can be found in the ÎOperating Manual of the con-
trol.
Resolving burner failures
zPress the burner reset button. Fig. 5 Resetting the burner.
1Reset button
1
CAUTION!
SYSTEM DAMAGE
Frequent pressing of the reset button can
lead to damage to the ignition system.
zDo not press the reset more than three
times. If the burner does not function
properly after three trials, review the
burner manual for details. Contact
your heating contractor or service
company.
CAUTION!
SYSTEM DAMAGE
from freezing.
When the heating system is not in opera-
tion due to a failure, the system can
freeze up.
zHave the failure corrected immediately
and start up the system again.
zProtect the system from freezing by
draining the heating and DHW pipes at
their lowest point.

Notes
Logano G125 BE - Specifications subject to change without notice. 11

BBT North America Corporation
50 Wentworth Avenue
Londonderry, NH 03053
Tel. [phone]
Fax [phone]
www.buderus.net
Products manufactured by
BBT Thermotechnik GmbH
D-35573 Wetzlar
www.buderus.de
BBT North America Corporation reserves the right
to make changes without notice due to continuing
engineering and technological advances.