Buderus Logano G215 WS User manual

Installation and maintenance
instructions
Oil and gas-fired special
boilers
Logano G215 WS
6 720 617 716 (10/2010) GB
For heating engineers
Please read carefully prior
to installation and
maintenance.

Contents
Logano G215 WS - We reserve the right to make any changes due to technical modifications.2
1Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Correct use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Please observe these notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.1 If you smell gas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4.2 Installation tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.3 Tips on the boiler room. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 Tools, materials and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.6 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Specifications for boiler without burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Declaration of conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Operating conditions on Buderus G and GE cast iron boilers . . . . . . . . . . . . . . . . . . . 9
3.3.1 General operating conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3.2 Conditions for the boiler room and ambient conditions . . . . . . . . . . . . . . . . . . . . 10
3.3.3 Combustion air supply conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.4 Fuel conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.5 Mains power supply conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3.6 Conditions for hydraulic system and water quality . . . . . . . . . . . . . . . . . . . . . . . 12
4 Scope of supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Transporting the boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6 Positioning boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.1 Wall clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7 Assembling the boiler block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.1 Assembly when delivered in separate sections . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.1.1 Preparation of boiler sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7.1.2 Driving nipples home . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.1.3 Preparing the central section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.1.4 Inserting the packing cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.1.5 Knocking the central section into place . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.1.6 Boiler section alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.1.7 Joining the boiler sections at the upper and lower boiler hubs using nipples . . . . . . . . . 20
7.1.8 Fitting the anchor rods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.1.9 Installing the feed pipe and connecting block . . . . . . . . . . . . . . . . . . . . . . . . . 23
7.1.10 Sealing the sensor well. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.1.11 Positioning the flue outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1.12 Closing the boiler hubs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.2 Checking for leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.2.1 Preparing for a leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.2.2 Leak test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.3 Installation when supplied as a pre-assembled block . . . . . . . . . . . . . . . . . . . . . . . 27
7.3.1 Sealing the sensor well. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.4 Installation steps for boilers supplied in sections and as a pre-assembled block. . . . . . . . 27
7.4.1 Fitting adjustable feet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.4.2 Inserting the hot gas baffle plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.4.3 Installing the burner door. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Contents
Logano G215 WS - We reserve the right to make any changes due to technical modifications. 3
7.4.4 Fitting the boiler shell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.5 Positioning and levelling boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8 Boiler installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.1 Flue gas connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.1.1 Fitting the flue pipe sealing collar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.1.2 Fitting the flue gas temperature sensor (accessory) . . . . . . . . . . . . . . . . . . . . . . 35
8.2 Making the water connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2.1 Connecting central heating flow and return . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2.2 Connecting the safety flow and return. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2.3 DHW cylinder connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.2.4 Installing boiler fill and drain valve (accessory) . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.3 Filling the heating system and checking for leaks. . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.4 Installing burner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.5 Providing a fuel supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
8.6 Making the electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.6.1 Fitting the control device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.6.2 Installing the temperature sensor set and burner cable . . . . . . . . . . . . . . . . . . . . . 40
8.6.3 Mains power connection and connection of additional components . . . . . . . . . . . . . . 40
8.6.4 Strain relief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8.7 Installing casing parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
9 Commissioning the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9.1 Creating operating pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9.2 Making the heating system operational . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9.3 Commissioning the control device and the burner . . . . . . . . . . . . . . . . . . . . . . . . . 43
9.4 Raising the flue gas temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
9.4.1 Removing hot gas baffle plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
9.4.2 Removing the hot gas check plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
9.5 Checking the high limit safety cut-out (STB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
9.6 Installing casing parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
9.7 Commissioning report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
10 Shutting down the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10.1 Standard shutdown. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
10.2 Emergency measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
11 Heating system inspection and maintenance . . . . . . . . . . . . . . . . . . . . . . . . 48
11.1 Why is regular maintenance important? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
11.2 Preparing the boiler for cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
11.3 Cleaning the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
11.3.1 Cleaning the boiler with cleaning brushes. . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
11.3.2 Wet cleaning (chemical cleaning) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
11.4 Checking the heating system operating pressure . . . . . . . . . . . . . . . . . . . . . . . . . 50
11.5 Inspection and maintenance reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
12 Remedying faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
13 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Safety
1
Logano G215 WS - We reserve the right to make any changes due to technical modifications.4
1Safety
1.1 About this manual
This manual contains important information for the safe
and correct installation, commissioning and
maintenance of this boiler.
In the following, the oil-/gas-fired special boiler
Logano G215 WS will generally be described as the
boiler.
These installation and maintenance instructions are
designed for specialists, who, –through their vocational
training and experience, – are knowledgeable in
handling heating systems and gas installations.
1.2 Correct use
The boiler is designed for generating heating water and
DHW, e.g. in detached homes or in apartment buildings.
Please observe the details on the type plate and the
specifications (ÎSection 3, page 7), to ensure the
correct use of this equipment.
1.3 Key to symbols
The following symbols are used in this manual:
ÎCross-references
Cross-references to a specific point or another
document are identified by an arrow Î.
1.4 Please observe these notes
Observe all local regulations and standards during
installation and operation:
–Local building regulations relating to installation,
combustion air supply and flue gas systems and
connection to a chimney.
–Regulations relating to the electrical connection to
the mains power supply.
–The technical rules of the gas supply company
regarding the connection of a gas burner to the mains
gas supply.
–Regulations and standards relating to heating
system safety equipment.
1.4.1 If you smell gas
WARNING!
RISK TO LIFE
Identifies possible risks, which may lead to
serious injury or death if appropriate care is
not taken.
CAUTION!
RISK OF INJURY/
SYSTEM DAMAGE
Identifies hazardous situations, which
could lead to medium or slight injuries or to
material losses.
CAUTION!
SYSTEM DAMAGE
Deviating from the stated operating
conditions may lead to faults occurring.
Major deviations may lead to the
destruction of individual components or of
the boiler.
zObserve the information on the boiler
type plate, which is definitive. Always
comply with this information.
USER NOTE
Tip for the optimum utilisation and setting
of the control(s) plus other useful
information.
USER NOTE
Only use original Buderus components.
Losses caused by the use of parts not
supplied by Buderus are excluded from the
Buderus warranty.
WARNING!
RISK TO LIFE
through the explosion of volatile gases.
If you can smell gas, there is a risk of
explosion.
zExtinguish all naked flames. Do not
smoke. Do not use lighters.
zPrevent sparks.
Do not operate electrical switches,
including telephones, plugs or door-
bells.
zClose the main gas shut-off valve.
zOpen windows and doors.
zWarn all occupants, but do not use
doorbells.
zCall your gas supplier from outside the
building!
zIf you hear gas escaping, immediately
leave the building, prevent others from
entering and notify the police and fire
brigade from outside the building.

Safety 1
Logano G215 WS - We reserve the right to make any changes due to technical modifications. 5
1.4.2 Installation tips
1.4.3 Tips on the boiler room
1.5 Tools, materials and accessories
Standard tools, as used in central heating and gas and
water systems, are required to install and maintain the
boiler.
The following may also prove useful:
–Sack trolley with strap or Buderus boiler trolley
–Timber support
–Cleaning brushes and/or chemical cleaning agent for
wet cleaning
If the boiler is delivered in sections, you will also require
the following:
–Compression tool 1.2 if the boiler is supplied in
sections (ÎCompression tool documentation)
–Flat board
–White spirit
–Installation kit (accessory)
–Bench hammer and wooden or rubber mallet
–Half round file
–Screwdriver (Philips and slotted head)
–Flat chisel
–Spanner SW 13, 19, 24, 36 and Allen key SW19
–Support wedge, flat iron
–Cleaning rags and cloth
–Fine emery cloth
–Wire brush
–3-in-1 oil
–Spirit level, ruler, chalk, straight edge
–Flange with air vent valve (for pressure test)
1.6 Disposal
zDispose of packaging in an environmentally
responsible manner.
zDispose of all heating system components that have
to be replaced at an authorised disposal site.
WARNING!
RISK TO LIFE
through the explosion of volatile gases.
zWork on gas-carrying parts may only
be carried out by qualified and
authorised personnel.
WARNING!
RISK TO LIFE
from electric shock.
zOnly qualified electricians are
permitted to carry out electrical work.
zBefore you open the control device:
Isolate all poles of the mains power
supply and secure against
unauthorised re-connection.
zPlease observe all installation
instructions.
WARNING!
RISK TO LIFE
from poisoning.
Insufficient ventilation can lead to
dangerous flue gas leaks.
zNever block off or obstruct air ducts and
vents or reduce their size.
zIf an obstruction cannot be removed
immediately, the boiler must not be
operated.
WARNING!
RISK OF FIRE
from flammable materials or liquids.
zNever store flammable materials or
liquids in the immediate proximity of the
boiler.

Product description
2
Logano G215 WS - We reserve the right to make any changes due to technical modifications.6
2Product description
This boiler is a low temperature boiler for oil or gas
combustion with modulating boiler water temperature
control.
The boiler comprises:
–Control device
–Boiler shell
–Boiler block with lagging
The control device monitors and controls all electrical
boiler components.
The boiler shell prevents energy losses and acts as a
silencer.
The boiler block transfers the heat generated by the
burner to the heating water. The lagging prevents
energy losses.
Suitable burners
Fit a suitable oil or gas burner to the boiler. Observe the
boiler specifications when selecting a burner
(ÎSection 3.1, page 7).
Fig. 1 Boiler without burner
1Control device
2Boiler shell
3Boiler block with lagging
4Burner door casing
1
2
3
4
CAUTION!
SYSTEM DAMAGE
through incorrect burner.
zOnly use burners which meet the
technical boiler requirements.

Specifications 3
Logano G215 WS - We reserve the right to make any changes due to technical modifications. 7
3Specifications
3.1 Specifications for boiler without burner
Select a suitable burner for this boiler using the
information in this section.
Fig. 2 Dimensions and connections (dimensions in mm)
Connections (for dimensions see the following tables):
VK =Boiler flow VS =DHW cylinder flow
RK =Boiler return RS =DHW return
EL =Drain (connection for boiler fill and drain valve) VSL =Safety flow pipe (connection for an on-site air vent valve)
Boiler rating 52 64 78 95
Boiler sections Number 4 5 6 7
Rated output kW 40 – 52 48 – 64 59 – 78 71 – 95
Combustion output kW 44,0 – 56,6 51,5 – 69,8 63,3 – 85,1 76,0 – 103,2
Boiler water content Iapprox. 61 approx. 73 approx. 85 approx. 97
Gas content I68,8 85,1 101,4 117,7
Flue gas temperature
1°C 160 – 198
Flue gas mass flow, oil
Partial load at 60 %
kg/s – – 0,021 0,026
Flue gas mass flow, oil Full load
2kg/s 0,018 – 0,024 0,022 – 0,030 0,027 – 0,036 0,032 – 0,044
CO2content, oil %13
Flue gas mass flow rate, gas
Partial load at 60 %
kg/s – – 0,021 0,026
Flue gas mass flow rate, gas
Full load3
kg/s 0,018 – 0,024 0,022 – 0,030 0,027 – 0,36 0,032 – 0,044
CO2contents, gas %10
Required draught Pa 0
Tab. 1 Specification for boiler without burner
1Flue gas temperature acc. to EN303.
2Full load details relate to the upper and lower rated output range.
3Safety limit (high limit safety cut-out). Max. possible flow temperature = high limit (STB).
Max. possible flow temperature = high limit (STB) –18 K
Example: Safety limit (STB) = 100 °C, max. possible flow temperature = 100 –18 = 82 °C.

Specifications
3
Logano G215 WS - We reserve the right to make any changes due to technical modifications.8
3.2 Declaration of conformity
Hot gas resistance mbar 0,30 – 0,42 0,16 – 0,35 0,25 – 0,46 0,35 – 0,71
Permissible flow temperature
3°C 120
Permissible operating pressure bar 4
Maximum time constant of thermostat and
high limit safety cut-out (STB)
s40
Boiler rating 52 64 78 95
Tab. 1 Specification for boiler without burner
1Flue gas temperature acc. to EN303.
2Full load details relate to the upper and lower rated output range.
3Safety limit (high limit safety cut-out). Max. possible flow temperature = high limit (STB).
Max. possible flow temperature = high limit (STB) –18 K
Example: Safety limit (STB) = 100 °C, max. possible flow temperature = 100 –18 = 82 °C.
Boiler rating 52 64 78 95
Overall boiler length (L) mm 787 907 1027 1147
Length of boiler block (LK)mm 680 800 920 1040
Transport dimensions of a single boiler
section (width/height/depth)
mm –460/820/150
Transport dimensions of boiler block
(width/height/depth)
mm 460/820/ Länge LK
Length of combustion chamber mm 548 668 788 908
Diameter of combustion chamber mm 337
Depth of burner door mm 95
Blast tube diameter (DB)mm 112 112 112 130
Circular hole diameter (DL)mm 150 150 150 170
Section feet clearance (FL)mm 455 575 695 815
Net weight
1kg 227 272 317 362
Tab. 2 Dimensions, weight and other information for boilers without burners
1Weight incl. packaging approx. 6 - 8% higher.
The design and operation of this product
conforms to European Directives and the
supplementary national requirements. Its
conformity is confirmed by the CE marking.
You can view the Declaration of Conformity
on the internet at www.buderus.de/konfo or
request a copy from your local Buderus
office.

Specifications 3
Logano G215 WS - We reserve the right to make any changes due to technical modifications. 9
3.3 Operating conditions on Buderus G and GE cast iron boilers
Thermostream technology is a unique feature of Buderus cast iron boilers. Return water is preheated and mixed within
the boiler before it comes in contact with the heated surface of the combustion chamber. The Thermostream technology
ensures there is an even temperature distribution in the boiler and avoids condensate forming within the combustion
chamber. This reduces thermal stress, the main cause of failure of normal cast iron boilers. The benefit of this
technology is that if the minimum boiler operating temperature of the boiler is maintained (see table below), there is no
need for a conventional shunt pump to be installed, saving the cost of a pump, the electricity it consumes and the
breakdown it can cause. The minimum boiler operating temperature as shown in the table below must be reached within
10 minutes and then be maintained while the burner is running.
3.3.1 General operating conditions
This operating condition can be easily achieved by the controls monitoring the boiler temperature and reducing the flow
rate through the boiler until the required temperature is reached. This is then maintained by continuing to control flow
based on the boiler temperature. The controls can reduce the flow rate by closing the valves on the mixed heating
circuits or by modulating the boiler primary pumps or by closing the motorised butterfly valves or by having a motorised
valve in the boiler return on a single boiler installation. The Buderus 4000 series controls can manage this process or
it can be done by the BMS.
If it is not possible for the controls to regulate the flow sufficiently to meet this operating condition then a shunt pump
circuit must be fitted to avoid the type of thermal stress that all boilers would experience in these conditions. This shunt
pump circuit can be controlled either with a Buderus 4000 control or with a Buderus 4212 fitted with a ZM427 module.
Failure to ensure that the operating condition is maintained may lead to thermal stress in the boiler and eventual failure
of the sections which would be outside the scope of the warranty.
Boiler controls Minimum flow
rate through the
boiler
Minimum return
water
temperature
Minimum boiler
operating
temperature for
oil
Minimum boiler
operating
temperature for
gas
Other conditions
Buderus 4000 with
control over all
heating circuits
none none 50 degrees1) 50 degrees1) when used with
two stage burner,
min load first stage
60%
Where the
Buderus control is
not controlling the
heating circuits ie
External control
(BMS) or
Constant
temperature
control with
Buderus 4212 with
ZM427
none none 60 degrees1) 60 degrees1) when used with
two stage burner,
min load first stage
60%
1This temperature has to be reached within ten minutes of the burner starting and has to be maintained whilst the burner is firing.

Specifications
3
Logano G215 WS - We reserve the right to make any changes due to technical modifications.10
3.3.2 Conditions for the boiler room and ambient conditions
3.3.3 Combustion air supply conditions
Operating conditions Notes –detailed requirements
Temperature in the boiler
room
+5 to +40 °C
Relative humidity max. 90 % No dew formation or precipitation inside the boiler room
Dust/airborne seed –Excessive dust inside the boiler room must be avoided when the boiler is
operating, e.g.:
– Dust from building work
Combustion air supplied from outside must not be excessively loaded with
dust or airborne seed; air filters should be fitted where required to prevent
this:
– Air supply loaded with dust from dirt roads and paths.
– Air supply loaded with dust from production and processing facilities, e.g.
quarries, mines, etc.
– Airborne seed from composite blossom
Halogenated hydrocarbon
compounds
–The combustion air must be free from halogenated hydrocarbon
compounds.
– Identify the source of halogenated hydrocarbon compounds and prevent
their ingress. Where this is impossible, route combustion air from areas that
are not contaminated by halogenated hydrocarbon compounds.
Observe the following:
– Buderus Catalogue - Heating Technology Germany
– Code of Practice K3 in the Buderus catalogue
Fans which extract air from
the boiler room.
–During burner operation, no mechanical air handling equipment may be
operated which could extract combustion air from the boiler room, e.g.:
– Cooker hood
–Dryer
– Ventilation equipment
Small animals –Protect the boiler room and particularly the combustion air inlet against the
ingress of small animals, for example by means of a grille.
Fire protection –Maintain clearances between the boiler and flammable materials in accordance
with local regulations. Generally, maintain a minimum clearance of 40 cm. Never
store flammable materials or liquids in the vicinity of the boiler.
Flooding –In case of an acute risk of flooding, disconnect the boiler in good time from its
fuel and power supply before water enters the room. Any general and burner
components or control equipment which comes into contact with water must be
replaced before re-commissioning.
Tab. 3 Boiler room and ambient conditions
Operating conditions Boiler output (in case of several
boilers = total output)
Air supply cross-section in cm2
(unrestricted aperture)
Ventilation cross-section for
combustion air from outside
(split over a maximum of
2apertures)
< 50 kW min. 150 cm2
> 50 kW min. 150 cm2plus an additional 2 cm2per kW,
in excess of 50 kW
Tab. 4 Combustion air supply – Observe local requirements!

Specifications 3
Logano G215 WS - We reserve the right to make any changes due to technical modifications. 11
3.3.4 Fuel conditions
3.3.5 Mains power supply conditions
Operating conditions Notes –detailed requirements
Permissible fuels for boilers
without integral burners
–This boiler can be operated with the following fuels. Select a burner which is
suitable for one of these fuel types:
– Fuel oil in accordance with the burner specification
Reduce the maintenance/cleaning intervals, if fuel oil of a lesser quality
(kinematic viscosity > 6 mm2/s at 20 °C) is used. In this case, carry out
maintenance and cleaning procedures at least twice annually.
– Natural gas in accordance with the burner specification
– LPG in accordance with the burner specification
– Biogas, sewer gas, methane, waste ground gas in accordance with the
following operating conditions
Contamination –Technically free of contaminants (for example dust, water vapour, liquid), i.e.
constant operation will not lead to the accumulation of contaminants causing a
reduction in the cross-section of valves, strainers and filters.
Biogases,
Sewer gas,
Pit gas,
Methane
–The following operating conditions must be met:
– Constant boiler water temperature, min. 75 °C
– Uninterrupted operation
– Minimum return temperature above the dewpoint – in this case at least
60 °C, i. e. raising the return temperature
– Regular cleaning and maintenance, possibly chemical cleaning with
subsequent preservation
Tab. 5 Fuels
Operating conditions Notes –detailed requirements
Mains power supply voltage 185 – 244 V Observe the voltage range of the burner and control devices used. The
housing/boiler must be earthed for functional and personal protection reasons.
Fuse 10 A
Frequency 47,5 – 52,5
Hz
Sinusoidal voltage curve
Protection –IP40 (protection against touch and the ingress of foreign bodies> 1 mm Ø, not
water protection)
Tab. 6 Mains power supply

Specifications
3
Logano G215 WS - We reserve the right to make any changes due to technical modifications.12
3.3.6 Conditions for hydraulic system and water quality
Operating conditions Notes –detailed requirements
Operating pressure
(overpressure)
0,5 – 4,0 bar
Permissible site test pressure 1,0 – 5,2 bar
Protection against over-
temperatures via TR
thermostat
50 – 90 °C
Protection against over-
temperatures via STB high
limit safety cut-out
100 – 120 °C Some control devices adjustable on site from 100 to 120 °C.
Water quality –Only use drinking water to fill and top up the boiler. We recommend a pH value
of 8.2 – 9.5.
Tab. 7 Hydraulic system and water quality

Scope of supply 4
Logano G215 WS - We reserve the right to make any changes due to technical modifications. 13
4Scope of supply
zAfter delivery, check that all packaging is in perfect
condition.
zCheck that the delivery is complete.
Boiler as assembled block
1The adjustable feet are stored inside the packaging of the burner
door casing.
Boiler supplied in sections
1The adjustable feet are stored inside the packaging of the burner
door casing.
Components Piece Packaging
Boiler block 1 1 pallet
Boiler casing 11 cardboard
box
lagging 11 plastic
packaging
Burner door casing, burner
door and installation
materials
1
11 cardboard
box
Control device 1 cardboard
box
Technical documentation 1 plastic
packaging
Tab. 9 Scope of supply
Components Piece Packaging
Front, centre and rear
sections
1 1 pallet
Fittings 11 cardboard
box
Boiler casing 11 cardboard
box
lagging 11 plastic
packaging
Burner door casing, burner
door and installation
materials
1
11 cardboard
box
Control device 11 cardboard
box
Technical documentation 1 plastic
packaging
Tab. 10 Scope of supply

Transporting the boiler
5
Logano G215 WS - We reserve the right to make any changes due to technical modifications.14
5Transporting the boiler
This section details how you safely transport your boiler.
CAUTION!
SYSTEM DAMAGE
through impact.
zPlease observe the handling
instructions on the packaging to protect
components susceptible to impact
damage.
USER NOTE
zProtect connectors against dirt if the
boiler is not immediately taken into use.
USER NOTE
Dispose of packaging in an
environmentally responsible manner.
CAUTION!
RISK OF INJURY
through inadequate securing during
transport.
zUse only suitable means for
transportation, e.g. a sack trolley with
strap, a stair or step trolley.
zSecure the load against falling.

Positioning boiler 6
Logano G215 WS - We reserve the right to make any changes due to technical modifications. 15
6Positioning boiler
This section details how to install and position the boiler
inside the boiler room.
6.1 Wall clearances
Where possible install the boiler with the recommended
wall clearances (Îtable). Reducing the minimum
clearances makes the boiler more difficult to access.
The base or foundation, on which the boiler is to stand,
must be perfectly flat and level.
The burner door can be fitted with the stop on the right
or left.
CAUTION!
SYSTEM DAMAGE
through frost.
zInstall the boiler in a room where it is
safe from the risk of freezing.
Fig. 3 Boiler room clearances (boiler positioned on the left-
hand or right-hand side)
Di-
men
sion
Wall clearance
Arecommendation 1300
minimum 1000
Brecommendation 700
minimum 400
Crecommendation 400
minimum 100
LKsee "Specification" section
Tab. 11 Recommended and minimum wall clearances
(dimensions in mm)
USER NOTE
Where applicable, allow extra wall
clearances for additional components, for
example DHW cylinder, pipe connections,
flue gas silencer or other components on
the flue gas side.

Assembling the boiler block
7
Logano G215 WS - We reserve the right to make any changes due to technical modifications.16
7Assembling the boiler block
The on-site installation is carried out using individual
sections if, because of physical limitations, a boiler block
cannot be assembled as a complete unit.
For the further installation of pre-assembled boiler
sections, see (ÎSection 7.3, page 27)
Fig. 4 Boiler block in the assembled state
1Foundation/installation location
2Drain
3Rear section
4flue outlet
5connecting block
6Central sections
7Anchor rods
8Front section
9Burner door
1
3
4
67
8
5
9
27
CAUTION!
RISK OF INJURY
through inadequate securing during
transport.
zUse only suitable means for
transportation, e.g. a sack trolley with
strap, a stair or step trolley.
zSecure the load against falling.

Assembling the boiler block 7
Logano G215 WS - We reserve the right to make any changes due to technical modifications. 17
7.1 Assembly when delivered in separate sections
zAssemble all boiler sections in accordance with the
following instructions and diagrams.
7.1.1 Preparation of boiler sections
zLocate the rear section on two timber supports.
zClean the boiler hubs with emery paper and a rag.
zRemove any burrs which might have been created
with a file.
zClean the packing spring or packing groove where
required using a wire brush and rag.
zClean the hub sealing faces with a rag soaked in
white spirit.
zEvenly coat the boiler hub sealing faces with red lead
putty.
zCoat the packing spring or packing groove with
adhesive (adhesive base).
Fig. 5 Remove burr
1Boiler hubs
2Rear section
3Timber supports
4Sealing spring
3
1
2
1
4
CAUTION!
RISK TO HEALTH and
RISK OF BURNING
through released vapours and easily
flammable cleaning agents.
zDuring the use of red lead putty,
adhesives and solvents ensure
adequate ventilation inside the boiler
room.
zWhen using solvents, avoid naked
flames, incandescence and sparks.
zPlease observe the manufacturer's
handling and safety instructions.
Fig. 6 Coating the boiler hubs with red lead putty
1Boiler hub sealing face
2Sealing spring
1
1
2

Assembling the boiler block
7
Logano G215 WS - We reserve the right to make any changes due to technical modifications.18
7.1.2 Driving nipples home
zClean the nipples with a cloth soaked in white spirit.
zEvenly coat the nipples with red lead putty.
zInsert the nipples straight into the upper and lower
hub of the rear section and hammer home securely
with alternate heavy blows.
zRemove any burrs which might have been created
with a file.
7.1.3 Preparing the central section
Prepare the centre section the same way as the rear
section (ÎSection 7.1.1, page 17).
Fig. 7 Driving nipples home
1Nipple in the upper boiler hub
2Nipple in the lower boiler hub
30
2
1
USER NOTE
zAfterwards, the nipples should protrude
approx. 30 mm from the respective
boiler hub.
Fig. 8 Preparing the central section
1Boiler hub sealing face
2Packing grooves
1
1
2

Assembling the boiler block 7
Logano G215 WS - We reserve the right to make any changes due to technical modifications. 19
7.1.4 Inserting the packing cord
zUnroll the required length of packing cord from the
roll supplied.
zPeel the backing paper off the packing cord, as you
insert the cord into the packing groove.
zInsert the flexible packing cord into the packing
groove, starting in the upper boiler hub area, and
lightly press in.
zAt the butt joints, overlap the packing cord by 2 cm
and press firmly together.
7.1.5 Knocking the central section into place
zTurn the centre section around and locate with the
upper and lower boiler hubs on the nipples of the rear
section.
zDrive the centre section onto the rear section using a
wooden or a rubber mallet.
Fig. 9 Inserting the packing cord
CAUTION!
SYSTEM DAMAGE
through leaking boiler sections.
zNever stretch the packing cord during
application to ensure that the faces
between the boiler sections are sealed
correctly.
zCarefully insert the packing cord into
the boiler section packing grooves.
Fig. 10 Knocking the central section into place
1Wooden or rubber mallet
2Rear section
1
2

Assembling the boiler block
7
Logano G215 WS - We reserve the right to make any changes due to technical modifications.20
7.1.6 Boiler section alignment
zRight the part assembled block comprising two boiler
sections.
zPosition a flat board underneath the centre section
so that the boiler block is slightly tilted for the next
stages of assembly.
7.1.7 Joining the boiler sections at the upper and
lower boiler hubs using nipples
CAUTION!
RISK OF INJURY
through inadequately secured boiler
sections.
zSecure the boiler block section against
tipping.
Fig. 11 Righting the part assembled block
1Flat board
2Centre section
1
2
CAUTION!
BOILER DAMAGE
through an unsuitable compression tool.
zUse only the Buderus compression tool
size 1.2.
Fig. 12 Making the pull rod threaded connection
1Pull rod threaded connection (incorrectly joined)
2Pull rod threaded connection (correctly joined)
1
2
CAUTION!
DAMAGE TO COMPRESSION TOOL
The compression tool may be damaged or
destroyed if you compress pull rods with
loose threaded connections.
zCheck the threaded connection of the
pull rods after every compression, and
tighten, if required.
The pull rod is correctly positioned if it
is fully inserted and no thread is
showing.
zKeep the thread of the compression
tool clean. Dirty threads can damage
the compression tool during
compression.