Buderus Logano GB125/22 BE Quick guide

For trained and certified
installers
Please read carefully prior
to installation, maintenance
and service
CAUTION!
Observe the safety instructions of this installation
and maintenance manual before placing the boiler
in operation.
DANGER!
Installation, adjustment, modification, operation or
maintenance of the heating system carried out by
an unqualified person may result in danger to life
and limb or property damage.
The directions of this installation and maintenance
manual must be followed precisely.
Contact a trained and certified service company or
service provider if support or additional information
is required.
CAUTION!
The operating manual is a component of the techni-
cal documentation and must be handed over to the
operator of the heating system.
Discuss the instruction in this manual with the ow-
ner or operator of the heating system to ensure that
they are familiar with all information required for
operation of the heating system.
Installation and Service
Instructions
Low Emissions and
High Efficiency
Condensing Oil Boiler
Logano GB125 BE US/CA
6 720 615 063 - 05/2009 US/CA

Contents
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.2
Contents
1 Safety instructions and explanation of
symbols 3
1.1 Safety instructions 3
1.2 Explanation of symbols 4
1.3 Standards, regulations and code compliance 5
1.4 Notes on installation and operation 5
1.4.1 Other important information 5
2 Product description 6
2.1 Intended use 6
2.2 Product details 7
2.3 Heating system water quality 8
2.4 Tools, materials and accessories 8
2.5 Package Contents 9
2.6 Dimensions and specifications 10
2.6.1 Logano GB125 BE dimensions 10
2.7 Conditions for operation 11
2.7.1 General operating conditions 11
2.7.2 Boiler room and ambient conditions 12
2.7.3 Fuel conditions 12
2.7.4 Power supply conditions 12
2.7.5 Hydraulic conditions and water quality 12
2.8 Disposal 13
3Movingtheboiler 14
3.1 Reducing the boiler weight for handling
purposes 14
3.2 Lifting and carrying the boiler 15
3.3 Moving the boiler with hand truck 15
4 Placing the boiler 16
4.1 Wall clearances 16
4.2 Reversing the burner door 17
4.3 Mounting the adjustable feet
(included with B-kit) 18
4.4 Positioning and leveling the boiler 18
5 Boiler installation 19
5.1 Flue pipe installation 19
5.2 Test ports 20
5.3 Installation options 22
5.4 Installation of Water Connections 24
5.4.1 Installing B-Kit 24
5.4.2 Installation of boiler drain (included in B-Kit) 25
5.4.3 Installation of system components 25
5.5 Filling heating system and checking
for water leaks 26
5.6 Connecting the fuel supply 27
5.7 Condensate trap 28
5.8 Electrical connections 29
5.8.1 Logamatic control installation 29
5.8.2 Fitting the temperature sensor assembly 30
5.8.3 Power connection and connections of
additional components 31
5.8.4 Fitting cable strain relief 32
5.9 Install the back boiler cover 32
6 Placing the heating system in operation 33
6.1 Bringing the system up to operating pressure 33
6.2 Testing relief valve 34
6.3 Checking position of heat exchanger baffles 34
6.4 Preparing the heating system for operation 34
6.5 Starting up the control and the burner 34
6.6 Taking measurements 35
6.7 Checking the manual reset high limit (STB) 36
6.8 Replacing the burner hood 36
6.9 Commissioning log 37
7 Shutting down the heating system 38
7.1 Normal shut-down 38
7.2 Shutting down the heating system in an
emergency 38
7.2.1 Action in an emergency 38
8 Heating system servicing 39
8.1 Why is regular servicing important? 39
8.2 Preparing the boiler for servicing 39
8.3 Cleaning the boiler 40
8.3.1 Cleaning the boiler with cleaning brushes 40
8.3.2 Wet cleaning (chemical cleaning) 41
8.4 Cleaning the heat exchanger system 42
8.5 Cleaning the neutralizer unit and trap 44
8.6 Checking the air supply hose 45
8.7 Check heating system operating pressure 45
8.8 Testing relief valve 46
8.9 Concentric combustion air supply and
flue pipe 46
8.10 Air supply system 46
8.11 Inspection and maintenance reports 47
9 Troubleshooting 50
10 Examples of installations 51
11 Spare parts 53
12 Wiring diagrams 62
Index 63

1
Safety instructions and explanation of symbols
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 3
1 Safety instructions and explanation of symbols
1.1 Safety instructions
If you smell flue gas
VSwitch off the boiler (Æpage 38).
VOpen windows and doors.
VInform an authorized heating contractor.
Risk of poisoning. Insufficient ventilation may
cause dangerous flue gas leaks.
VNever close off or reduce the size of air inlet or outlet
vents.
The boiler must not be operated until the obstruction
has been removed.
VEnsure that no mechanical air-extraction equipment
draws air from the boiler room, e.g. kitchen vent hood,
clothes dryer, central vacuum system, etc.
VInform the system operator in writing of an existing
problem and associated danger.
Danger from escaping flue gases
VMake sure that the flue pipes and seals are not dam-
aged.
VUse silicone as sealing compound.
VNever install a barometric nor a thermally controlled
vent damper with this boiler.
VConnect only one boiler to each flue system or chimney
flue.
VThe flue system piping must not feed into another air
extraction duct.
VDo not route the flue system piping through or inside
another duct, used for exhausting air or other flue
gases.
VThe condensate trap must be primed at all times. Fail-
ure to do so will allow combustion gases to escape into
boiler room.
Dangers posed by explosive and combustible
materials
VDo not use or store combustible materials (paper, lace
curtains, clothing, thinners, paints, etc.) near the boiler.
VMaintain a clearance of 16 inches from the boiler.
Combustion air
VKeep the supply of air for combustion free of corrosive
substances (e.g. halogenated hydrocarbons that con-
tain chlorine or fluorine compounds). In that way you
will prevent corrosion.
Danger from electrical shock
VBefore opening the boiler:
Disconnect the heating system from the electrical
power supply by means of the emergency shutoff
switch or the heating system circuit breaker on the
main fuse panel.
VIt is not sufficient just to switch off the control.
VTake measures to ensure the heating system can not
be switched on again unintentionally.
Installation
VCorrect and proper installation and adjustment of the
burner and the controls are the fundamental require-
ments for safe and economic operation of the boiler.
VThe boiler may only be installed and maintained by a
trained and certified heating contractor.
VDo not modify any parts that carry flue gases.
VOnly qualified electricians are permitted to carry out
electrical work. Follow applicable code.
VThe hot water tank may only be used for heating
domestic hot water.
VNever shut off safety relief valves! Water may
escape from the safety relief valve when the water is
being heated.
DANGER TO LIFE
by 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.

1Safety instructions and explanation of symbols
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.4
Maintenance and service
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,
– 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 should only be carried out by a
trained and certified heating contractor.
VHave any faults immediately corrected in order to pre-
vent damage to the system.
VUse only genuine spare parts. Damage caused by the
use of parts not supplied by Buderus is not covered by
the Buderus warranty.
Instructing the customer
VExplain to the customer how the boiler works and how
to operate it.
VInform the customer that he/she must not carry out any
alterations or repairs.
1.2 Explanation of symbols
Signal words are used to indicate the seriousness of the
ensuing risk if measures for minimizing 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 additional information.
Notes do not contain any warnings or information about
hazards or risks.
Cross-references to particular places in the document or
to other documents are marked with an arrow Æ.
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.

1
Safety instructions and explanation of symbols
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 5
1.3 Standards, regulations and code
compliance
1.4 Notes on installation and operation
When installing and operating the heating system
observe the following:
– The local building codes regarding the installation
– The local building codes regarding combustion air sup-
ply and venting systems, and the chimney connection
– Regulations governing electrical connection to the
mains power supply
– The regulations and standards relating to the safety
systems for the water heating system
1.4.1 Other important information
– Only operate the boiler with the concentric air/venting
system specifically designed and approved for it.
– Follow the local code when connecting the conden-
sate outlet to the public sewer system.
It is the installers responsibility to ensure the
installation and operation of this heating sys-
tem meets all applicable federal, state, and
local codes.
The boiler must be installed by a qualified in-
staller and in accordance with all require-
ments of NFPA-31, "Installation of Oil-
Burning Equipment". Installation must com-
ply with all local and national legal require-
ments and the regulations of all institutions
having legislative authority with regard to the
installation of oil-fired boilers.

2Product description
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.6
2 Product description
This installation and maintenance manual contains impor-
tant information for the safe and correct installation, initial
start-up and maintenance of this boiler.
The Logano GB125 BE oil-fired condensing boiler is gen-
erally referred to below simply as the boiler.
These installation and servicing instructions are intended
for trained and certified heating contractors, who – as a
result of their technical training and experience – are
skilled in dealing with heating systems and DHW installa-
tions.
This boiler must be installed with one of the Buderus sup-
plied concentric heating systems.
– Concentric direct vent side wall kit
– Concentric vertical kit
– Concentric masonry chimney kit
This boiler produces significant amounts of acidic flue gas
condensate while in operation. Condensate may cause
damage to sewer pipes and septic systems, and disposal
may be subject to local regulations. In the absence of
such regulations Buderus recommends a condensate
neutralization kit.
The boiler must draw all combustion air from the outside.
2.1 Intended use
The boiler is designed for heating central heating system
water and indirect heating of domestic hot water (e.g. in a
hot water tank), for instance in single family homes or multi
family buildings.

2
Product description
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 7
2.2 Product details
This boiler is an oil-fired, fan-assisted condensing boiler
with modulating control of boiler water temperature.
The boiler consists of:
– Control panel
– Boiler jacket
– Boiler heat exchanger with insulation
–Burner
– Heat exchanger system
The controls monitor and control all electrical boiler com-
ponents.
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 heating water. The insulation prevents
energy loss.
Fig. 1 Boiler with burner
1Control panel - Logamatic
2Boiler jacket
3Boiler heat exchanger with insulation
4Burner hood
5Burner
Fig. 2 Rear view with heat exchanger (thermal insula-
tion not shown)
1Secondary condensing heat exchanger system

2Product description
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.8
2.3 Heating system water quality
Poor water quality can damage heating systems due to
scale formation and corrosion (Tab. 8).
2.4 Tools, materials and accessories
For the installation and maintenance of the boiler, you
need standard tools used for central heating and DHW
systems, plus metric wrenches and metric Allen
wrenches.
The following may also prove useful:
– Hand truck with securing strap or Buderus boiler cart
– Wood battens
– Cleaning brushes and/or chemical cleaning agent for
wet cleaning
Caution: Risk of system damage due to un-
suitable heating system water.
VIf oxygen-permeable pipes are used, e.g.
for radiant heating systems, the systems
must be separated from the boiler by a
heat exchanger. Unsuitable heating sys-
tem water promotes sludge formation and
corrosion. This can result in heat exchang-
er malfunction and damage.

2
Product description
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 9
2.5 Package Contents
VUpon delivery, check that the packaging is undam-
aged.
VCheck the delivery for completeness.
Component Qty Packaging
Boiler heat exchanger 1 1 pallet
Boiler casing, factory-fit-
ted to boiler heat
exchanger
Burner hood, factory-fitted
to boiler heat exchanger
Heat exchanger system
Oil burner with factory-fit-
ted burner door
Air supply hose, factory-fit-
ted
Condensate trap 1 1 bag1)
1) Under the burner hood
B-kit components:
– Conversion nipple
(1¼" NPT)
– 30 psi relief valve
– Boiler drain (¾")
– Pressure/temperature
gauge
– Double nipple
(1¼" NPT × R1¼)
– 90°-elbow (1¼” NPT)
– 90°-elbow (¾" NPT)
– Burner mounting studs
and washers
– Adjustable feet
11bag
1)
Logamatic control panel 1 1 box
Tigerloop oil filter and
deaerator
11box
Technical documentation 1 bag
Tab. 1 Package Contents

2Product description
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.10
2.6 Dimensions and specifications
2.6.1 Logano GB125 BE dimensions
Fig. 3 Connections and dimensions (measurements in inches)
VK = Boiler supply
RK = Boiler return
EL = Boiler drain (connection for drain valve)
Dimensions and connections:
Boiler model Unit GB125/22 BE GB125/30 BE GB125/35 BE
Boiler sections 344
Rated heat output (gross output)
131/86 °F
MBtu/hr 76 102 124
Rated heat output (net IBR rating)
131/86 °F
MBtu/hr 67 90 109
Rated heat output (gross output)
176/140 °F
MBtu/hr 75 100 121
Rated heat output (net IBR rating)
176/140 °F
MBtu/hr 65 87 105
Burner input MBtu/hr 81 108 131
AFUE %91.2 91.1 91.0
Flue gas temperature 176/140 °F °F 176 176 192
Boiler water content gal 8.7 11.8 11.8
Gas volume of combustion chamber and heat
exchanger
cu.ft. 1.5 2.0 2.0
Oil firing rate gph 0.60 0.75 0.95
Flue gas back-pressure in. W.C. 0.08" - 0.14" W.C.
Heat exchanger water pressure loss
(DeltaT = 18 °F)
ft. of
head
1.8' 2.0' 2.7'
Maximum supply temperature1)
1) Safety manual reset high limit (safety temperature limiter, STB)
Maximum permitted supply temperature = Safety limit (STB) – 32 °F
Example: Safety limit (STB) = 212 °F, maximum possible flow temperature = 212 - 32 = 180 °F
The safety limit must meet the national regulations of the country concerned.
°F 212
Maximum operating pressure psi 44
Maximum time constant of thermostat and
high limit safety cut-out (STB)
s40
Tab. 2 Specifications

2
Product description
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 11
2.7 Conditions for operation
Maintaining the specified operating conditions will enable
the boiler to provide a high level of reliability and long serv-
ice life. Some details relate only to operation with Buderus
Logamatic control panels.
2.7.1 General operating conditions
Boiler model Unit GB125/22 BE GB125/30 BE GB125/35 BE
Boiler overall length (L) inch 37 1/2" 42 3/8" 42 3/8"
Boiler block length (LK) inch 25 3/4" 30 ½" 30 ½"
Combustion chamber length inch 16" 20 ½" 20 ½"
Combustion chamber length inch 10 5/8"
Burner door thickness inch 2 1/3"
Distance between boiler feet (FL) inch 16 1/8" 20 7/8" 20 7/8"
Net weight1) lbs 423 503 503
Tab. 3 Dimensions, weight and other data for boilers without burners
1) Weight incl. packaging material approx. 6- 8 % more.
Caution: Risk of system dama ge if operating
conditions are not maintained.
Extreme divergence from the stated condi-
tions may cause irreversible damage to indi-
vidual components of the boiler as a whole.
VThe information on the rating plate is defin-
itive.
Operating conditions
Min. boiler water
temperature
Operating interruption
(complete boiler shutdown)
Heating circuit with
heating circuit mixer1) Min. return temperature
In combination with Logamatic control for variable low-temperature operating modes, such as Logamatic 2107
no requirements operating
temperatures are ensured by
the Logamatic controls 2)
Automatically by Logamatic controls not required but recommended with
low-temperature heating system
design 130/113 °F
Required with:
– Underfloor radiant heating systems
– Systems with large water capacity:
> 115 gal/MBH
(1 MBH = 100,000 Btu/hr)
No requirements
Tab. 4 General operating conditions
1) A heating circuit with a mixer improves controllability and is specifically recommended for systems with several heating circuits.
2) If heating zones or a boiler circuit actuator cannot be regulated via the control device (for example pump logic), an operating temperature of
122 °F must be reached within 10 min of switching the burner ON by restricting the water volume flow.

2Product description
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.12
2.7.2 Boiler room and ambient conditions
2.7.3 Fuel conditions
2.7.4 Power supply conditions
2.7.5 Hydraulic conditions and water quality
Operating conditions Notes – Requirement in greater detail
Temperature in the boiler room +40 to +104 °F
relative humidity max. 90 % No condensation or precipitation inside the boiler room
Dust/airborne particles −Excessive dust inside the boiler room must be avoided when the boiler is opera-
ting, e.g.:
– dust from building work
Combustion air supplied from outside must not be excessively loaded with dust
or airborne seed; if necessary, air filters should be fitted to prevent this:
– Air supply contaminated with dust from dirt roads and paths.
– Air supply contaminated with dust from production and processing facilities, e.g. quar-
ries, mines, etc.
– Airborne particles from thistles and similar
Halogenated-hydrocarbon com-
pounds
−The combustion air must be free from halogen-hydrocarbon compounds.
– Identify the source of halogen-hydrocarbon compounds and seal it off. Where this is
impossible, route combustion air from areas that are not contaminated by halogenated-
hydrocarbon compounds.
Small animals −Prevent small animals from entering the boiler room, particularly through the air inlet vents –
by fitting them with screens.
Fire safety −Maintain clearances between the boiler and flammable materials in accordance with local
regulations. A minimum clearance of 16” is required. Never store flammable materials or liq-
uids in the vicinity of the boiler.
Flooding −In case of an acute risk of flooding, disconnect the boiler in time from the from its fuel and
power supply before water enters the room. Any general and burner components or control
equipment, which come into contact with water, must be replaced before re-commission-
ing.
Tab. 5 Boiler room and ambient conditions
Country All countries
Fuels #2 Fuel oil ASTM D396-05 Type 2
Approved for B5 Fuel Oil (5% biodiesel (B100) according ASTM D6751)
Remarks The burner may only be operated with the specified fuel.
Clean and service once a year. Check that the entire system functions properly at the same time. Immediately rec-
tify any faults identified.
Tab. 6 Country-specific fuels and remarks
Operating conditions Notes – Requirement in greater detail
Mains supply voltage 110 - 120 V The outer casing/boiler must be grounded for safety reasons and in order to function correctly.
Circuit breaker 10 A
Frequency 60 Hz
Enclosure rating −IP 40 (protected against contact by entry of foreign objects > 0.04 inches Ø (> 1 mm Ø ),
no water proofing)
Tab. 7 Power supply
Operating conditions Notes – Requirement in greater detail
Operating pressure (above
atmospheric)
15 – 44 psi Maximum 30 psi with the supplied safety valve.
Permissible testing pressure 45 – 58 psi
Safety temperature limitation by
TR temperature control
122–194°F
Safety temperature limitation by
manual reset high limit (STB)
212 °F
Water quality −The heating system may only be filled and topped up with water of domestic water quality.
We recommend a pH level of 8.2 – 9.5.
Tab. 8 System configuration and water quality

2
Product description
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 13
2.8 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.

3Moving the boiler
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.14
3 Moving the boiler
This chapter details how to move the boiler safely.
3.1 Reducing the boiler weight for handling purposes
If required, you can reduce the weight of the boiler by
removing the burner hood and door.
VUnscrew the burner-hood screws.
VLift burner hood slightly and draw forwards to remove.
VBefore removing the burner door: unplug the burner
plug from the burner control unit.
Fig. 4 Removing burner cover
VUnscrew two hex-head bolts at the sides.
VOpen burner door.
VLift the burner door off its hinges.
Fig. 5 Removing the burner door
Caution: Risk of system damage from im-
pact shocks!
Fragile components could be damaged.
VObserve the transport instructions on the
packaging.
Protect boiler connections from damage and
dirt if the boiler is not installed immediately.
Dispose of packaging in an environmentally
responsible manner.
Prevent the burner door from falling over and
damaging the burner and blast tube.
7 747 019 141-04.1RS

3
Moving the boiler
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 15
3.2 Lifting and carrying the boiler
The boiler can be held and carried at the grip positions
shown (Fig. 6).
VUndo the transit screws.
Fig. 6 Lifting and carrying the boiler
3.3 Moving the boiler with hand truck
Moving the boiler with hand truck (Fig. 7)
VPlace the hand truck (e.g. boiler trolley or sack truck) at
the back of the boiler.
VSecure boiler to hand truck using strapping.
VMove the boiler to the installation location.
Fig. 7 Moving the boiler with a boiler hand truck
The boiler is secured to the pallet by
2 screws for transportation purposes.
Warning: Risk of injury from carrying heavy
loads.
VAlways lift and move the equipment with
the assistance of another person using the
handle positions shown.
7 747 019 141-05.1RS
Bottom of boiler
Warning: Risk of injury if load is inadequate-
ly secured during transportation.
VUse suitable means of transportation, e.g.
the Buderus boiler hand truck with strap.
VSecure the load against falling.
You can order the boiler hand truck from your
Buderus distributor.
The boiler trolley can also be used to facilitate
work on the underneath of the boiler, e.g. fit-
ting the adjustable feet (ÆChapter 4.3,
page 18).

4Placing the boiler
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.16
4 Placing the boiler
This chapter describes how to install and place the boiler
in the boiler room.
4.1 Wall clearances
Wherever possible, position the boiler with the recom-
mended wall clearances. Reducing the minimum clear-
ances makes the boiler more difficult to access.
The boiler base or foundation must be perfectly flat and
level.
The burner door is factory-fitted with the hinges on the
right. The burner door can be converted to left hand
closing.
Fig. 8 Wall clearances in the boiler room (boiler posi-
tioned on the right-hand side)
Caution: Risk of system damage due to
freezing.
VInstall the heating system in a frost-free
room.
Dimen-
sion Wall clearance
A Recommended 40"
minimum 27"
B Recommended 27"
minimum 16"
C Recommended 28"
minimum 20"
D Recommended 16"
minimum 6"
LÆChapter 2.6.1, page 10
Tab. 9 Recommended and minimum wall clearances
(dimensions in inches)
The boilers are designed for a side clearance
of 6 ".
Where applicable, allow extra wall clearanc-
es for additional components such as DHW
tank pipe connections, flue silencer, other
flue components, etc.
Warning: Risk of fire from flammable materi-
als or liquids.
VClearances less than 6" must comply with
local and statutory codes.
VMake sure that there is a sufficient clear-
ance between combustible materials and
the chimney connection as specified by
NFPA 31 (distance of 18 ").
VThe floor must comply with the require-
ments of NFPA 31.

4
Placing the boiler
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 17
4.2 Reversing the burner door
The burner door is factory-fitted with the hinges on the
right – the burner door opens to the right. You can change
the burner door hinges over to the left-hand side if
required to suit the installation site.
Requirement: the burner hood must have been removed
first (ÆChapter 3.1, page 14).
VRemoving the burner door (ÆChapter 3.1, page 14).
VUnscrew the hinge-pin bolts [1] and remove the hinge
pins [2].
VFix the hinge pins [2] on the left-hand side of the boiler
using the hinge-pin bolts.
Fig. 9 Reversing the burner door (boiler heat
exchanger attachments)
1Hinge bolts
2Hinges
VUnscrew the hinge-barrel bolts [1] and remove the
hinge barrels [2].
VFix the hinge barrels [2] on the left-hand side of the
burner door [3] using the hinge-barrel bolts.
VHang the burner door [3] by locating the hinge barrels
[2] on the hinge pins [4].
VCheck that the heat exchanger baffles are placed hori-
zontally (ÆChapter 6.3, page 34).
VClose the burner door [3] and secure with the two hex-
agon-head bolts. Tighten the hexagon-head bolts
evenly (approx. 90 lb ins) so that the burner door seals
properly.
Fig. 10 Reversing the burner door (door attachments)
1Hinge-barrel bolts
2Hinge lobes
3Burner door
4Hinges
5Heat exchanger baffle plates
7 747 019 141-08.1RS
12 21
If the burner door hinges have been changed
over to the left-hand side, the burner cable
must be disconnected from the burner before
opening the burner door.
7 747 019 141-09.1RS
1
4
5
2
3

4Placing the boiler
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.18
4.3 Mounting the adjustable feet (included with B-kit)
Level the boiler by turning the adjustable feet to prevent
air pockets becoming trapped inside the boiler.
Requirement: the burner hood or burner door panel must
have been removed first (ÆChapter 3.1, page 14).
VTilt the boiler with the aid of a hand truck or trolley
(ÆChapter 3.3, page 15) or place a wooden batten
underneath to jack it up.
VScrew in adjustable feet [2] ¼" – 1/8".
VGently set the boiler down.
Fig. 11 Fitting the adjustable feet
(burner not shown)
1Angle bracket
2Adjustable feet
4.4 Positioning and leveling the boiler
VPosition the boiler in its final location.
VLevel the boiler by rotating the adjustable feet as
required and using a level.
Fig. 12 Leveling the boiler
If the boiler is mounted on top of a horizontal
hot water tank the adjustable feet are not
used.
7 747 019 141-10.1RS
1
2
Protect boiler connections from damage and
dirt if the boiler is not to be installed immedi-
ately.
7 747 019 141-11.1RS

5
Boiler installation
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice. 19
5 Boiler installation
This chapter details how to install your boiler correctly.
This involves the following steps:
– Connecting the venting system
– Providing air supply for combustion
– Connecting the water pipes
– Making the electrical connections
– Connecting the fuel supply
5.1 Flue pipe installation
The overall burner air supply/boiler flue pipe system con-
forms to the types of oil combustion equipment listed in
the table below.
Observe the national standards and regulations for opera-
ting oil-fired appliances.
Danger: Risk of fatal injury from toxic flue
gases.
VNever connect more than one boiler to a
flue system – regardless of whether the
flue is vertical or horizontal.
VCommon venting appliances can cause
damage to property and personal injury.
VDo not route the flue system through an-
other flue system that is in use, e.g. a ma-
sonry chimney connected to a wood
stove.
VFollow the instructions of the flue pipe
manufacturer.
The boiler must be installed by a trained and
certified installer in accordance with all re-
quirements of NFPA-31, "Installation of Oil-
Burning Equipment". Installation must com-
ply with all local and national codes applica-
ble to the installation of oil-fired boilers.
In Canada, the requirements of CSA/CGA-
B139.1 and 2 Installation Codes apply.
The GB125 boiler is approved for zero (0")
clearance between its concentric vent pipe
and combustibles.
Because of the tight construction of modern
houses, this boiler must draw all air supply for
combustion from outside (RLU).
Instal-
lation
Type Combustion air supply and flue system
I Concentric combustion air supply and flue
pipe exiting horizontally through external wall.
Combustion air supply and flue systems are
part of the combustion equipment.
II Concentric combustion air supply and flue
pipe system exiting vertically through roof.
Combustion air supply and flue systems are
part of the combustion equipment.
III Vent pipe installed inside a masonry chimney.
The space around the vent pipe is used for
combustion air.
Tab. 10 Types of installation

5Boiler installation
Logano GB125 BE US/CA - Technical specifications are subject to change without prior notice.20
5.2 Test ports
Flue gas readings and combustion air temperature read-
ings are taken exclusively at the dedicated testing ports.
Follow the directions in the instructions for the Logatop
BE oil burner.
Fig. 13 Fitting the flue/air pipe socket