Buderus Logano G115 WS US/CA User manual

For the operator
Please read carefully before
use.
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.
Do not store or use gasoline or any other flammable
liquids or vapors in the vicinity of this system or any
other heating system.
Operating Instructions Low-temperature
oil boiler
6 720 615 225-00.1RS
Logano G115 WS US/CA
6 720 615 226 - 08/2007 US/CA

Contents
Logano G115 WS 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 Turning the heating system on 7
3.2 Checking the operating pressure, topping up
the boiler water and bleeding air from
the system 7
3.2.1 Checking the operating pressure 7
3.2.2 Topping up the boiler water and bleeding
the system 8
3.3 Starting the heating system using the controls 9
3.4 Turning the heating system off 10
3.5 Action in an emergency 10
3.6 Operating tips 10
3.7 Why is regular servicing important? 11
4 Troubleshooting 12
4.1 Identifying operating modes and
resetting faults 12

1
General safety instructions and explanation of symbols
Logano G115 WS 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 gas
VSwitch off the boiler (Æpage 10).
VOpen windows and doors.
VInform an authorized 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 or converted by an
approved heating contractor.
VDo not modify any parts that carry flue gas.
VThe hot water tank may only be used for heating
domestic hot water.
VNever shut off safety valves!
Water must be able to escape from the safety valve for
the hot water system and piping when the water is
being heated.
Maintenance and servicing
Heating systems should be regularly maintained for the
following reasons:
– to maintain a high level of efficiency and to operate the
system economically (low fuel consumption),
– to achieve a high level of operational reliability,
– to maintain the cleanest combustion.
VThe flue system must be inspected once a year. Have
all parts that show any signs of damage from corrosion
or other causes replaced.
VThe boiler must be serviced by qualified boiler service
company once a year. Servicing must include the
burner, the entire flue and combustion air system and
any air inlet/outlet vents. All parts that show any signs
of damage from corrosion or other causes must be
replaced.
VRecommendation for users: sign a maintenance
and servicing contract with an approved heating con-
tractor covering annual servicing and maintenance.
VServicing and repairs may only be carried out by a
trained heating contractor.
VHave any faults immediately corrected in order to pre-
vent damage to the system.
VThe operator is responsible for the general and environ-
mental safety of the heating system.
VUse only genuine Buderus spare parts. Damage
caused by the use of parts not supplied by Buderus is
not covered by the Buderus warranty.
Danger by failing to consider your own safety in an
emergency such as a fire
VNever put yourself at risk. Your own safety must always
take the highest priority.
Dangers posed by explosive and flammable mate-
rials
VAny work on components that carry oil may only be car-
ried out by a certified heating contractor.
VDo not use or store flammable (paper, thinners, paints,
etc.) near the boiler.
VMaintain a clearance of at least 16 inches from the
boiler.
Risk of 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 qualified customer service technician immedi-
ately to check the appliance and replace any controls
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). In that way you will prevent
corrosion.
Instructing the operator
VThe operator must read the information on how the
boiler works and have the heating system installer
explain how to operate it.

1General safety instructions and explanation of symbols
Logano G115 WS US/CA - Technical specifications are subject to change without prior notice.
4
1.2 Explanation of symbols
Signal words are used to indicate the level of risk if
counter measures 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 additional information.
Notes do not contain any warnings or information about
hazards or risks.
Warnings are indicated by a warning trian-
gle and a grey background.
Notes are identified in the text by this sym-
bol. They are separated by horizontal lines
above and below the text.

2
Product description
Logano G115 WS 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 overall view of the use and operation of the
boiler.
2.1 Intended use
The boiler is designed for heating central heating system
water and domestic hot water, in residential buildings or
apartment buildings, and light commercial installations.
Other uses are not intended.
2.2 Certification and testing mark
This appliance has been tested and certified to meet rules
and regulations in place for the US and Canadian mar-
kets.
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
The boiler (ÆFig. 1) is a low-temperature oil-fired appli-
ance.
The main components of the boiler (ÆFig. 1) are:
– Control panel
– Boiler jacket
– Boiler heat exchanger with insulation
The controls monitors the boiler and system water tem-
peratures and controls the burner. It also includes the
safety devices.
The boiler can alternatively be fitted with a simple aqu-
astat control.
The boiler jacket prevents heat loss and reduces noise.
The boiler heat exchanger transfers the heat generated by
the burner to the heating water. The thermal insulation
reduces radiant and standby heat loss.
Fig. 1 Boiler without burner
1Control panel
2Boiler jacket
3Boiler heat exchanger with insulation
4Burner door
5Burner door panel
6 720 615 225-01.1RS
1
2
3
4
5

3
Commissioning the heating system
Logano G115 WS US/CA - Technical specifications are subject to change without prior notice. 7
3 Commissioning the heating system
3.1 Turning the heating system on
Before switching on, ensure that:
– the operating water pressure is sufficient,
– the fuel supply has been turned on at the main shut-off
valve, and
– the heating system emergency shut-off switch is in the
ON position.
3.2 Checking the operating pressure,
topping up the boiler water and
bleeding air from the system
The water used for filling the heating system loses a sub-
stantial amount of volume in the first few days due to the
release of its gas content. This causes air pockets to form
and the heating system starts to make noises.
VWith new heating systems, check the operating pres-
sure daily at first, topping up the boiler water and
bleeding the system and radiators (if so equipped).
VLater on, check the operating pressure monthly, top-
ping up boiler water and bleeding the boiler and radia-
tors (if so equipped).
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 (psi) and temper-
ature (°F) from the temperature/pressure gauge.
VIf the temperature/pressure gauge needle drops below
the minimum pressure marker of 15 psi, the operating
pressure is too low. Top up the system until the con-
tractor's selected operating pressure is reached.
Fig. 2 Pressure/temperature gauge
7 747 010 720-24.2RS

3Commissioning the heating system
Logano G115 WS US/CA - Technical specifications are subject to change without prior notice.
8
3.2.2 Topping up the boiler water and bleeding
the system
Ask your heating contractor to show you where the boiler
fill & drain valve for topping up the heating system is
located in your heating system.
VIf there the fill valve is not hard piped to the water sup-
ply, you will need to connect a hose.
VFill the heating system by slowly opening the fill valve.
Observe the pressure gauge (pressure/temperature
gauge) while doing so.
VClose the boiler fill valve once the required operating
pressure has been reached.
VBleed the system via the air vent and the radiator bleed
valves (if so equipped).
VTop up with additional water if the pressure drops as a
result of bleeding the system.
Caution: Health risk from contaminated do-
mestic water.
VIt is imperative that you observe all regula-
tions and standards applicable in your
country regarding prevention of domestic
water contamination.
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 and a leak in the boiler.
VOnly fill the heating system when cold (the
flow temperature should be no more than
100 °F).
Caution: Risk of system damage due to fre-
quent topping up.
If you have to top up the heating water fre-
quently, the heating system may suffer dam-
age from corrosion or scaling due to
repeated introduction of oxygen.
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, as there may be a leak.
Operating pressure
Design operating pressure
(optimum setting) _____________ psi
Maximum heating system
operating pressure
(standard = 30 psi) _____________ psi
Tab. 1 Operating pressure (entered by system installer)

3
Commissioning the heating system
Logano G115 WS US/CA - Technical specifications are subject to change without prior notice. 9
3.3 Starting the heating system using the controls
Switching on the controls automatically places the burner
on standby. The burner is then ready to start. For more
information, consult the instruction manual for the controls
and the burner.
VSet the boiler temperature control to "AUT" (Automatic
mode). In that setting, the controls operates the boiler.
VSet the ON/OFF switch to position "I" (ON).
Fig. 3 Switching on the controls
(e.g. Logamatic 2000 )
Starting up the system using the Aquastat
VSwitch on emergency shut-off switch ("ON" position).
This turns on the heating system.
Fig. 4 Switching the heating system on/off using the
emergency shut-off switch (without Buderus
controls)
Information on operating the system, e.g. set-
ting the temperatures, can be found in the
controls' documentation.
1
2
7 747 019 141-28.1RS
7 747 019 141-35.1RS

3Commissioning the heating system
Logano G115 WS US/CA - Technical specifications are subject to change without prior notice.
10
3.4 Turning the heating system off
With Buderus controls (
Æ
Fig. 3, page 9)
VSwitch off the on/off switch on the controls
(position "0"). This switches off the boiler and all its
components (such as the burner).
With Aquastat (
Æ
Fig. 4, page 9)
VSwitch off the emergency shut-off switch ("OFF" posi-
tion). This switches off the boiler and all its compo-
nents.
Completing final operations
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 means of the heating system emergency stop
switch or the appropriate electrical fuse/circuit breaker.
3.6 Operating tips
The right fuel
To ensure it operates properly, the heating system
requires fuel of the correct type and grade.
Information on the boiler room
Caution: Risk of system damage from freez-
ing.
If the heating system has been switched off,
it may freeze up.
VLeave the heating system permanently
switched on as much as possible.
VProtect your heating system against freez-
ing by draining the heating system and hot
water pipes at the lowest point.
Use the heating system emergency shutoff
switch located outside the boiler room or the
heating system circuit-breaker for emergency
shutdown.
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 sys-
tem installer.
Use only this fuel
__________________________
____________________________________________
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 combustion air free of corrosive
substances (e.g. halogenated hydrocar-
bons that contain chlorine or fluorine com-
pounds).
VPrevent heavy accumulation of dust.
Caution: Risk of system damage from water.
VIn the event of severe risk of flooding, dis-
connect 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
flood water must be replaced by a quali-
fied heating contractor.

3
Commissioning the heating system
Logano G115 WS US/CA - Technical specifications are subject to change without prior notice. 11
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.
Caution: Risk of system damage due to lack
of or inadequate cleaning and maintenance.
VHave your heating system inspected,
cleaned and maintained by a heating con-
tractor once a year.
VWe recommend you sign a contract cov-
ering an annual inspection and mainte-
nance on an as-required basis.

4Troubleshooting
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12
4 Troubleshooting
4.1 Identifying operating modes and
resetting faults
Two type of fault are distinguished:
– Burner faults and
– Control and heating system faults
If there is a burner fault the fault indicator lamp on the
burner comes on (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
control unit display if it has one. More detailed information
can be found in the controls' documentation.
Fig. 5 Resetting the burner
1Burner
Correcting burner faults
VPress reset button on burner.
1
6 720 615 225-04.1RS
Caution: Risk of system damage due to
too many resets. Always follow the burner
manufacturer's instructions.
Too many resets can damage the bur-
ner's ignition transformer.
VDo not press the reset button more
than three times in a row. If the fault
does not reset after the third attempt,
localize and rectify the fault with the
help of the burner documentation. No-
tify a service contractor if necessary.
Caution: Risk of system damage from
freezing.
The heating system can freeze up in cold
weather if it has been switched off or dis-
abled by a fault shutdown.
VRectify the fault immediately and re-
start the heating system.
VIf that is not possible, protect the heat-
ing system against freezing by draining
it at the lowest point.
Canadian installations of this boiler are re-
quired to be equipped with a blocked vent
switch (WMO) that interrupts the burner in
case of an obstructed flue gas pipe. Call your
boiler service technician if you suspect the
WMO may have tripped.

Notes
Logano G115 WS US/CA - Technical specifications are subject to change without prior notice. 13

Notes
Logano G115 WS US/CA - Technical specifications are subject to change without prior notice.
14

Notes
Logano G115 WS US/CA - Technical specifications are subject to change without prior notice. 15

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