Buderus Logano GB125 BE US User manual

For the owner and operator
Please read carefully prior
to operating the boiler.
DANGER!
If these instructions are not followed exactly, a fire
or explosion may be caused with serious property
damage or loss of life and serious injury.
Donotstoreorusegasoline or anyotherflammable
liquids or vapors in the vicinity of this system or any
other heating system.
The heating system must only be installed and ser-
viced by a trained and certified technician.
Operating Instructions Low Emissions and
High Efficiency
Condensing Oil Boiler
Logano GB125 BE US/CA
6 720 615 060 - 10/2007 US

Contents
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.
2
Contents
1 General safety instructions and explanation
of symbols 3
1.1 Safety instructions 3
1.2 Explanation of symbols 4
2 Product description 5
2.1 Intended use 5
2.2 Certification and testing mark 5
2.3 Disposal 5
2.4 Product description 6
3 Commissioning the heating system 7
3.1 Starting up the heating system 7
3.2 Checking the operating pressure, topping
off the boiler water and bleeding the system 7
3.2.1 Checking the operating pressure 7
3.2.2 Topping off the boiler water and bleeding
the system 8
3.3 Starting the boiler system using the
Logamatic 2107 Controls 9
3.4 Shutting down the heating system 9
3.5 Action in an emergency 9
3.6 Operating tips 10
3.7 Why is regular servicing important? 10
4 Troubleshooting 11

1
General safety instructions and explanation of symbols
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 3
1 General safety instructions and explanation of symbols
1.1 Safety instructions
If you smell flue gases
VSwitch off the boiler (Æpage 9).
VOpen windows and doors.
VInform a trained and certified heating contractor.
Installation
VCorrect and proper installation and adjustment of the
burner and the controls are the fundamental require-
ments for safe and economical operation of the boiler.
VThe boiler may only be installed by trained and certified
heating contractor.
VDo not modify any parts that carry flue gases.
VNever close off safety valves!
Water may escape from the safety relief valve when is
being heated.
Maintenance and servicing
Heating systems should be regularly maintained for the
following reasons:
– to achieve a high level of efficiency and to operate the
system economically (low fuel consumption),
– to achieve a high level of operational reliability and a
long service life,
– to maintain the cleanest possible combustion.
VRecommendation for users: sign a maintenance
and servicing contract with a trained and certified heat-
ing contractor covering annual servicing and condition-
based maintenance.
VServicing and repairs may only be carried out by a
trained and certified heating contractor.
VHave any faults immediately rectified in order to prevent
damage to the system.
VThe operator is responsible for the general and environ-
mental safety of the heating system.
VUse only genuine spare parts. Damage caused by the
use of parts not supplied by Buderus is not covered by
the Buderus warranty.
Danger of failure to consider your own safety in an
emergency such as a fire
VNever put yourself at risk of fatal injury. Your own safety
must always take the highest priority.
Dangers posed by explosive and combustible
materials
VAny work on components that carry oil may only be car-
ried out by a trained and certified heating contractor.
VDo not use or store combustible material (paper, thin-
ners, paints, etc.) in the boiler room.
VMaintain a clearance of 16 inches from the boiler.
Risk of flue gas poisoning. Insufficient ventilation
may cause dangerous flue gas leaks.
VNever close off or reduce the size of air inlet or outlet
vents.
VThe boiler must not be operated until the obstruction
has been removed.
Risk of water damage
VDo not use the appliance if any part of it has been
under water.
VCall in a trained and certified heating contractor imme-
diately to check the appliance and replace any electri-
cal or fuel carrying components that have been under
water.
Combustion air
VKeep the combustion air free of corrosive substances
(e.g. halogenated hydrocarbons that contain chlorine
or fluorine compounds)to prevent corrosion.
Instructing the customer
VThe operator must read the information on how to oper-
ate the boiler and have the heating contractor explain
details.
Other important information
VThe flue system must be inspected once a year. Have
all parts replaced that show any signs of damage from
corrosion or other causes.
VThe boiler must be serviced by a trained and certified
heating contractor once a year. Servicing must include
the burner, the entire venting and air supply system and
any air inlet/outlet vents. All parts that show any signs
of damage from corrosion or other causes must be
replaced.

1General safety instructions and explanation of symbols
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.
4
1.2 Explanation of symbols
Signal words are used to indicate the seriousness of the
ensuing risk if measures for minimising damage are not
taken.
–Caution indicates that minor damage to property may
occur.
–Warning indicates that minor personal injury or severe
damage to property may occur.
–Danger means that severe personal injury may occur.
Very serious cases may result in death.
Notes contain important information in cases where there
is no risk to the user or the appliance.
Warnings are indicated by a warning trian-
gle and a grey background.
Notes are identified in the text by this sym-
bol. They are bounded by horizontal lines
above and below the text.

2
Product description
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 5
2 Product description
To ensure safe, economical and environmentally friendly
use of the heating system, we recommend that you care-
fully read the safety instructions and operating instruc-
tions.
These instructions provide the operator of the heating
system with an overview of the use and operation of the
boiler.
2.1 Intended use
The boiler is designed for central heating and indirect
heating of domestic hot water (e.g. with use of a hot water
tank), for instance in single family homes or multi family
buildings. Any other purpose is considered improper use.
2.2 Certification and testing mark
This appliance has been tested and certified for the US
and Canadian markets.
2.3 Disposal
VDispose of boiler packaging in an environmentally
responsible manner.
VAll heating system components that have to be
replaced should be disposed of in environmentally
responsible manner at an authorized disposal site.

2Product description
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6
2.4 Product description
This unit is a condensing boiler equipped with an oil
power burner and modulating control of the boiler water
temperature.
The boiler consists of:
– Logamatic controls
– Boiler jacket
– Boiler vessel with insulation
– Burner
– Secondary (condensing) heat exchanger system
The controls monitors and controls all electrical boiler
components.
The boiler jacket prevents heat loss and acts as a noise
insulator.
The boiler heat exchanger transfers the heat generated by
the burner to the boiler water. The insulation prevents
energy loss. Fig. 1 Boiler with burner
1Logamatic controls
2Boiler jacket
3Boiler vessel with insulation
4Burner hood
5Burner
Fig. 2 Rear view with secondary (condensing) heat
exchanger (thermal insulation not shown)
1Secondary (condensing) heat exchanger system

3
Commissioning the heating system
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 7
3 Commissioning the heating system
3.1 Starting up the heating system
Before switching on the power ensure that
– the operating boiler water pressure is sufficient,
– the fuel supply has been turned on at the main shut-off
valve, and
– the heating system emergency shutoff switch is in the
ON position.
3.2 Checking the operating pressure,
topping off the boiler water and
bleeding the system
The boiler water may loose a substantial amount of vol-
ume in the first few days due to the release of gas content.
This causes air pockets to form and make noise.
VWith new heating systems, check the operating pres-
sure daily at first, topping off the boiler water and
bleeding the system as needed.
VLater on, check the operating pressure monthly, top-
ping off boiler water and bleed as needed.
3.2.1 Checking the operating pressure
Your heating contractor will have set the system to the
required operating pressure of at least 15 psi (1 bar) and
entered the setting in tab. 1, page 8.
VRead the current operating pressure and temperature
from the temperature/pressure gauge.
VIf the temperature/pressure gauge needle drops below
the minimum pressure of 15 psi, the operating pressure
is too low. Add water to the system.
Fig. 3 Pressure/temperature gauge
7 747 010 720-24.2RS

3Commissioning the heating system
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.
8
3.2.2 Topping off the boiler water and bleeding
the system
Ask your heating contractor to show you where the boiler
fill & drain valve for topping off the heating system is
located in your heating system.
VSlowly fill the heating system. Observe the pressure
gauge (pressure/temperature gauge) while doing so.
VClose the boiler fill valve once the required operating
pressure has been reached.
VBleed heat exchanger using the bleed valve [1].
VBleed the system via the radiator bleed valves (if appli-
cable).
VTop off with water if the pressure drops as a result of
bleeding the system.
Fig. 4 Bleeding the secondary (condensing) heat
exchanger
1Bleed valve on heat exchanger
Warning: Health risk from contaminated do-
mestic water.
VIt is imperative that you observe all appli-
cable regulations and standards regarding
prevention of domestic water contamina-
tion.
Caution: Risk of damage to system due to
temperature stress.
If you fill the heating system when it is hot, the
resulting temperature stress can cause
stress cracks. The boiler will then leak.
VOnly fill the heating system when cold (the
boiler temperature should be no more
than 100 °F (38 °C)).
Caution: Risk of system damage from fre-
quent introduction of fresh water.
If you have to top off the boiler water fre-
quently, the heating system may suffer dam-
age from corrosion or scale buildup,
depending on the water quality.
VAsk your heating contractor if the local wa-
ter can be used untreated or whether it
needs to be treated.
VNotify your heating contractor if you find
you need to top up your heating system
frequently.
Operating pressure
Design operating pressure
(optimum setting) _____________ psi
Maximum operating pressure
(standard = 30 psi)
_____________ psi
Tab. 1 Operating pressure (entered by system installer)

3
Commissioning the heating system
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 9
3.3 Starting the boiler system using the Logamatic 2107 Controls
Turning the Logamatic 2107 controls on automatically
places the burner on standby. The burner will then be fired
upon a heat demand. For more information, consult the
instruction manual for the Logamatic 2107.
VSet the boiler temperature control [1] to "AUT" (Auto-
matic mode). In that setting, the controls manages all
functions of the boiler.
VSet the ON/OFF switch [2] to position "I" (ON).
Fig. 5 Switching on the Logamatic 2107 controls
1Boiler manual thermostat
2ON/OFF switch
3.4 Shutting down the heating system
VTurn off the ON/OFF switch on the controls
(position "0"). This switches off the boiler and all its
components (such as the burner).
VShut off fuel supply by closing main valve.
3.5 Action in an emergency
In the event of an emergency, e.g. a fire, proceed as fol-
lows:
VNever put yourself at risk of fatal injury. Your own safety
must always take the highest priority.
VShut off fuel supply by closing main valve.
VIsolate the heating system from the mains power sup-
ply by disengaging the heating system circuit breaker
or emergency shutoff switch.
Information on operating the system, e.g. set-
ting the temperatures, can be found in the
documentation of the Logamatic 2107.
1
2
7 747 019 141-28.1RS
Caution: Risk of system damage from freez-
ing.
If the heating system has been switched off,
it may freeze in cold weather conditions.
VLeave the heating system running as much
as possible.
VProtect the heating system from freezing
by draining the heating system and hot
water pipes at the lowest point.

3Commissioning the heating system
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.
10
3.6 Operating tips
The right fuel
To ensure it operates properly, the heating system
requires fuel of the correct type and grade.
Never use gasoline, kerosine, crank case, or other fuels!
Information on the boiler room
3.7 Why is regular servicing important?
Heating systems should be regularly maintained for the
following reasons:
– to achieve a high level of efficiency,
– to operate the system economically (low fuel consump-
tion),
– to maintain the cleanest possible combustion
– to ensure reliable operation and a long service life.
Caution: Risk of system damage from use of
incorrect fuel.
VOnly use the fuel specified. The correct
fuel is entered in tab. 2 by the heating con-
tractor.
Only use this fuel type
#2 Fuel oil ASTM D396-05 Type 2
Approved for B5 fuel oil
____________________________
____________________________________________
Stamp/Date/Signature
Tab. 2 Fuel to be used (entered by heating system
installer)
Caution: Risk of boiler damage from con-
taminated combustion air.
VKeep the supply of air for combustion free
of corrosive substances (e.g. halogenated
hydrocarbons that contain chlorine or fluo-
rine compounds). In that way you will pre-
vent corrosion.
VPrevent heavy accumulations of dust.
Caution: Risk of system damage from flood-
ing.
VIn the event of risk of flooding, disconnect
the boiler from its power supply and shut
off the fuel supply before water enters the
boiler room.
VAfter the flood has subsided, ask your in-
staller to check the heating system before
starting it up again.
VAll parts that have been in contact with
water must be replaced by a trained and
certified heating contractor.
Caution: Risk of damage to system due to
lack of or inadequate cleaning and mainte-
nance.
VHave your heating system inspected,
cleaned and maintained by a trained and
certified heating contractor once a year.
VWe recommend you sign a contract cov-
ering an annual inspection and condition
based maintenance.

4
Troubleshooting
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 11
4 Troubleshooting
There are two types of fault:
– Burner faults and
– Control and heating system faults.
If there is a burner fault, the fault indicator lamp on the
burner will light (Æburner documentation). Such faults
can generally be reset by pressing the reset button on the
burner. Controls and heating system faults are indicated
on the display of the controls. More detailed information
can be found in the documentation of the Logamatic
2107 controls.
Correcting burner faults
VPress reset button on burner.
Fig. 6 Resetting the burner
1Reset button
Caution: Risk of burner damage from fre-
quent pressing of the reset button.
If the reset button is pressed more than 3
times in quick succession the ignition trans-
former can be damaged.
VDo not press the reset button more than
three times in a row.
VIf the fault does not reset after the third at-
tempt, try to localize and rectify the fault
with the help of the burner documentation.
VNotify a a trained and certified heating
contractor.
Caution: Risk of system damage from freez-
ing.
The heating system can freeze up in cold
weather if it has been disabled due to a fault
shutdown.
VRectify the fault immediately and restart
the heating system.
VIf this is not possible, protect your heating
system from freezing by draining the heat-
ing system and hot water pipes at the low-
est point.

Bosch Thermotechnology Corp.
50 Wentworth Avenue
Londonderry, NH 03053
Tel. [phone]
Fax [phone]
www.buderus.net
Products manufactured by
Bosch Thermotechnik GmbH
Sophienstrasse 30-32
D-35573 Wetzlar
www.buderus.de
Bosch Thermotechnology reserves the right
to make changes without notice due to continuing
engineering and technological advances.