Buderus Logano G334 X User manual

6304 2270 – 09/2005 US/CA For heating engineers
Please read carefully prior to installation and maintenance.
CAUTION!
Observe the safety instructions of this
installation and maintenance manual
before placing the boiler in operation.
WARNING!
If installation, adjustment, modification,
operation or maintenance of the
heating system is carried out by an
unqualified person, this 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
qualified service company, service
provider or the gas company if support
or additional information is required.
CAUTION!
The operating manual is a component
of the technical documentation and
must be handed over to the operator of
the heating system. Discuss the
instruction in this manual with the
owner or operator of the heating
system to ensure that they are familiar
with all information required for
operation of the heating system.
Note: Keep this installation and maintenance manual available for future
reference.
Installation and maintenance
instructions
Gas boiler
Logano G334 X

Contents
2Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
We reserve the right to make any changes due to technical modifications.
1Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Correct use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Observe the following symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Please observe these notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Tools, materials and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Dimensions and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Moving the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.1 Moving the boiler with boiler cart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 Placing the boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.1 Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.2 Leveling the boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 Boiler installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7.1 Preparing for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7.2 Installing the draft hood and the main drain . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7.3 Installing the side panels and the front boiler jacket . . . . . . . . . . . . . . . . . . . . . 13
7.4 Connecting the heating system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.5 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.6 Installation of Logamatic 2107 control (accessory). . . . . . . . . . . . . . . . . . . . . . 17
7.7 Gas supply connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.8 Filling heating system and checking for leaks . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.9 Install front boiler panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8 Check openings for combustion air supply and venting . . . . . . . . . . . . . 24
9 Requirements for connection to chimneys or venting systems . . . . . . . 25
10 Flue pipe installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
11 Placing the heating system in operation . . . . . . . . . . . . . . . . . . . . . . . . . 28
11.1 Start-up instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
11.2 Making boiler ready for operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
11.3 Shutting off gas supply to boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
11.4 Instruct owner/operator and hand over technical documentation . . . . . . . . . . . . . 36
11.5 Start-up protocol. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
12 Taking the boiler out of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
12.1 Normal boiler shut-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
12.2 Emergency shut-down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Contents
3
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
13 Boiler inspection and maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
13.1 Why is regular maintenance important? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
13.2 Testing the flue system, including combustion air, air inlets and
Ventilation openings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
13.3 Inspection of the boiler and burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
13.4 Preparing boiler for cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
13.5 Cleaning the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
13.6 Cleaning the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
13.7 Troubleshooting on the G334 X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
13.8 Maintenance protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
14 Parts lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
15 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
16 Wiring diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Safety1
4Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
We reserve the right to make any changes due to technical modifications.
1 Safety
Observe these instructions for your safety.
The burner and control must be correctly installed and
adjusted to ensure safe and economical operation of the
gas-fired boiler.
Read this installation and maintenance manual carefully
and note the details on the boiler nameplate before
placing the boiler in operation.
1.1 Correct use
The Logano G334 X gas-fired boiler is designed to heat
water for a hot water heating system and for heating
single or multiple occupancy buildings.
1.2 Observe the following symbols
Two levels of danger are identified and signified by the
following terms:
Additional symbols for identification of dangers and user
instructions:
1.3 Please observe these notes
1.3.1 National regulations
The heating system must comply with the relevant
regulations issued by national authorities, or the
regulations issued by the National Fuel Gas Code,
ANSI Z 223.1. In Canada the regulations of CAN/CGA
B149.1 or 2, Installation Code for Gas Burning
Appliances and Equipment, must be observed.
If specified by the local regulatory authorities the heating
system must comply with the regulations of the
"Standard for Controls and Safety Devices for
Automatically Fired Boilers," ANSI/ASME CSD-1.
Carbon monoxide detectors must be installed as
specified by the local regulations. The boiler must be
serviced annually (ÎChapter 13, page 39).
Boiler operating conditions
The hot water pipe system must comply with the current
legislation and regulations. If an existing boiler is
replaced, the complete hot water pipe system must be
inspected to ensure that it is in perfect condition to
ensure safe operation.
WARNING!
RISK TO LIFE
Identifies possible dangers emanating
from a product, which might lead to serious
injury or death if appropriate care is not
taken.
CAUTION!
RISK OF INJURY/
SYSTEM DAMAGE
Identifies potentially dangerous situations,
which might lead to medium or slight
injuries or to material losses.
WARNING!
RISK TO LIFE
from electric shock.
USER NOTE
Tip for the optimum utilization and setting
of the control(s) plus other useful
information.
Maximum boiler temperature 220 °F
Maximum operating pressure 58 psi
WARNING!
RISK TO LIFE
due to neglecting your own safety in case
of emergency, such as with a fire.
zNever put yourself at risk. Your own
safety must always take priority.

Safety 1
5
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
1.3.2 Installation notes
1.3.3 Information on the boiler room
WARNING!
RISK TO LIFE
from explosion of flammable gases.
If you smell gas there is a danger of
explosion.
zNever work on gas lines unless you are
licensed for this type of work.
zMake sure that a qualified company
installs the boiler, connects gas and
venting, places the boiler in operation,
connects the electrical power, and
maintains and repairs the boiler.
zNo open flame. No smoking. Do not
use lighters.
zPrevent spark formation.
Do not operate electrical switches,
including telephones, plugs or door
bells.
zClose main gas valve.
zOpen doors and windows.
zWarn other occupants of the building,
but do not use door bells.
zCall gas company from outside the
building.
zIf gas can be heard escaping, leave the
building immediately, prevent other
people from entering, notify police and
fire from outside the building.
CAUTION!
SYSTEM DAMAGE
due to incorrect installation.
zObserve all current standards and
guidelines applicable to the installation
and operation of the heating system as
applicable in your country.
WARNING!
RISK TO LIFE
from electric shock.
zDisconnect the power supply to the
heating system before conducting any
work on it, e.g. switch off the heating
emergency switch outside the boiler
room.
zIt is not sufficient just to switch off the
control.
CAUTION!
SYSTEM DAMAGE
due to unsatisfactory cleaning and
maintenance.
zClean and service the system once a
year. Check that the complete heating
system operates correctly.
zImmediately correct all faults to prevent
system damage.
USER NOTE
Only use original Buderus spare parts.
Losses caused by the use of parts not
supplied by Buderus are excluded from the
Buderus warranty.
WARNING!
RISK TO LIFE
from explosion of flammable gases.
zNever work on gas lines unless you are
licensed for this type of work.
WARNING!
RISK TO LIFE
from electric shock.
zDo not carry out electrical work unless
you are qualified for this type of work.
zBefore opening a unit: disconnect
electrical power completely and lock to
prevent accidental reconnection.
zObserve the installation regulations.
WARNING!
RISK TO LIFE
by poisoning.
Insufficient ventilation may cause
dangerous flue gas leaks.
zMake sure that inlets and outlets are not
reduced in size or closed.
zIf faults are not corrected immediately,
the boiler must not be operated.
zInform the system operator of the fault
and the danger in writing.

Safety1
6Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
We reserve the right to make any changes due to technical modifications.
1.4 Tools, materials and accessories
You need standard tools for the installation and
maintenance of the boiler as used in heating system
installation and oil, gas and water installations.
The following additional items will also be useful.
–Boiler cart with rope or Buderus boiler cart
–Cleaning brushes and/or chemical cleaning agents
for wet cleaning
1.5 Disposal
zDispose of the packaging material in an
environmentally compatible fashion.
zDispose of any components of the heating system
that require replacement in an environmentally
compatible fashion.
WARNING!
RISK TO LIFE
by poisoning.
When working on the flue gas monitoring
equipment leaking flue gas may endanger
the lives of people.
zDo not attempt to repair the flue gas
temperature sensor.
zUse only original parts when replacing
parts.
zWhen replacing the flue gas
temperature sensor install the new one
in the specified position.
WARNING!
RISK TO LIFE
by poisoning by leaking flue gas.
If the flue gas monitor trips frequently,
there may be a problem with the chimney
or the flue gas venting.
zIf the flue gas monitor trips frequently
the fault must be corrected and a
function test must be conducted.
WARNING!
RISK TO LIFE
by poisoning by leaking flue gas.
zMake sure that the boiler is not fitted
with a thermally controlled flue gas
baffle after the back flow check.
WARNING!
FIRE DANGER
due to flammable materials or liquids.
zMake sure that there are no flammable
materials or liquids in the immediate
vicinity of the boiler.

Product description 2
7
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
2 Product description
The boiler is a low temperature gas-fired boiler.
The boiler consists of:
–Automatic ignition unit and aquastat
–Logamatic 2107 control (accessory for separate
order)
–Boiler jacket and front panel
–Boiler block with insulation
–Burner
The automatic igniter, the aquastat and, if applicable,
the Logamatic 2107 monitor and control all electrical
components of the boiler.
The boiler jacket prevents energy loss and acts as
soundproofing.
The boiler block transfers the heat generated by the
burner to the heater water. The insulation prevents
stand-by losses.
Fig. 1 Logano G334 X boiler
1Boiler front panel
2Logamatic 2107 control (accessory)
3Boiler jacket
4Aquastat (control unit)
5Automatic igniter
6Boiler block with insulation
7Burner
7
1
6
4
5
3
2
USER NOTE
The boiler is fully functional with the
factory-installed aquastat. The
Logamatic 2107 control can also be
installed in addition to the factory-installed
aquastat.

8Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
We reserve the right to make any changes due to technical modifications.
Dimensions and connections3
3 Dimensions and connections
Tab. 1 Dimensions
Fig. 2 Back, side and front view, measurements in inches
Boiler
size
Input Heating
capacity
A VENT Min. overflow
valve capacity
Number of
burner tubes
Water
volume
Empty
weight
MBtu/hr MBtu/hr Inches Inches lb/hr No. US gal. lbs
73 301 249 34.6 8249 59.2 758
92 378 314 41.7 9314 611.4 930
116 476 396 48.8 10 396 713.5 1093
132 541 450 55.9 10 450 815.6 1265
Fig. 3 Pressure chart
USER NOTE
For the size and dimensions of the main
gas orifice see ÎChapter 15, page 66.

Scope of delivery 4
9
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
4 Scope of delivery
zCheck packaging on delivery for damage.
zCheck delivery for completeness.
The boiler is supplied in one package with the gas
burner and gas valve, boiler jacket and technical
documentation.
The following accessories are supplied in separate
packages:
Tab. 2 Scope of delivery
Component Qty Packaging
Boiler block 11 pallet
Draft hood 11 box
Boiler jacket 11 box
Technical documents 11 foil
package
90° elbow (¾" NPT) 1
1 box
Safety valve 1
Drain valve ½" 1
Accessories1Qty
Logamatic 2107 control 1
Heat circulation pump 1
Cleaning brush 1
Exhaust flap 1
Tab. 3 Accessories
1Accessories available by separate order

10 Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
We reserve the right to make any changes due to technical modifications.
Moving the boiler5
5 Moving the boiler
This chapter describes how to move the boiler safely,
5.1 Moving the boiler with boiler cart
zThe boiler must be fully packed for transport to the
installation location.
zRemove the straps and the cardboard packaging.
zRemove the bolts from the pallet.
zLift the boiler at the sides and slide to the edge of the
pallet. Place a pipe under the boiler (Fig. 4) and roll it
on additional pipes to the installation location.
zPlace the boiler in its final position.
CAUTION!
SYSTEM DAMAGE
due to bumps.
zCheck the transport diagrams on the
packaging to protect the sensitive
components from damage by bumping.
USER NOTE
zProtect the boiler connections from dirt
if the boiler is not installed immediately.
USER NOTE
Dispose of the packaging material in an
environmentally compatible fashion.
Fig. 4 Moving the boiler
USER NOTE
Make sure that all sheet metal parts, pipe
connections, burners and the controller
are protected during transport.
zNever lift the boiler by these parts.
CAUTION!
RISK OF INJURY
if the boiler is not properly secured to the
trolley.
zUse suitable transport equipment, such
as a trolley with a belt.
zSecure the boiler to prevent it from
falling.

Placing the boiler 6
11
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
6 Placing the boiler
This chapter explains how to place the boiler and
position it in the boiler room.
The boiler is very heavy when full. Check that the floor
can bear the weight before installation.
6.1 Clearances
A space of at least 33 inches is recommended in front of
the boiler with the door open to allow sufficient access
space for operation and maintenance. When the door is
closed, a minimum clearance of 2 inches is required at
the front and sides, 6 inches clearance is also required
for the flue pipe and 30 inches clearance to the ceiling
(ÎFig. 5). The installation location and the base must
be smooth and horizontal. The boiler may be installed on
a flammable base, but not on carpet.
6.2 Leveling the boiler
zLevel the boiler block vertically and horizontally. Use
metal wedges or metal strips if necessary.
CAUTION!
SYSTEM DAMAGE
through frost.
zPlace the boiler in a frost-free room.
Fig. 5 Required clearances in the boiler room

12 Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
We reserve the right to make any changes due to technical modifications.
Boiler installation7
7 Boiler installation
This chapter describes how to install the boiler. This
includes the following tasks:
–Connecting the heating system
–Electrical connection
–Fuel supply connection
7.1 Preparing for installation
zUnpack all boxes and containers and check all parts
against the packing lists to make sure that everything
has been supplied.
7.2 Installing the draft hood and the main drain
zFasten draft hood to the exhaust manifold with the
eight retaining screws (included).
USER NOTE
Every boiler is carefully inspected and
tested before it leaves the factory.
However, if you discover any damage or
missing parts, please inform the supplier
immediately. Before disposing of packing
material, make sure that no parts are still
in it.
USER NOTE
The gas connection pipe is designed for a
gas connection on the right side.
zIf the gas connection is from the left,
the gas connection pipe must be
completely unscrewed, turned 180°
and then sealed again.
zCheck the connection for leaks.
Fig. 6 Installing draft hood, Logano G334 X
1Retaining screws on exhaust manifold
11

Boiler installation 7
13
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
7.3 Installing the side panels and the front boiler jacket
zPress insulation panels into the side between the
cast feet.
zInsert thermal insulation mats for the right side panel
behind the gas connection pipe.
zFasten the two side panels with two self-tapping
screws at the bottom and one at the back of the boiler
zPosition the intermediate panel thermal insulation
mats on the top of the front of the boiler with the fabric
side on the outside.
zIf the two side hooks on the front boiler jacket are not
in position, bend them with pliers and push them into
the slots in the side panel edges from behind.
zFasten the two rear tabs on the front boiler jacket to
the side panels with two self-tapping screws.
Fig. 7 Insulation panels
1Insulation panel
1
Fig. 8 Side panels and front boiler jacket
1Rear tab
2Side hook
3Side panel screws
3
1
2

14 Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
We reserve the right to make any changes due to technical modifications.
Boiler installation7
7.4 Connecting the heating system
Fig. 9 Low-water alarm
1Boiler
2Radiator
3Heating system with low-water alarm
4Heating system without low-water alarm
1
2
2
12
2
2
2
3
4
CAUTION!
BOILER DAMAGE
through moisture.
zProtect the components of the gas
ignition system from moisture (dripping,
spray, rain) during installation of the
boiler, during operation and during
maintenance work (such as replacing
the pump, replacing the control, etc.).
CAUTION!
SYSTEM DAMAGE
due to overheating as a result of low water.
zNote that a boiler installed above the
level of the heating system must be
fitted with a low-water alarm. The low-
water alarm must be installed during
installation of the boiler (ÎFig. 9).
CAUTION!
SYSTEM DAMAGE
due to high temperature variations in the
heating system.
zIf the boiler is operated in connection
with a refrigeration system, make sure
that the pipes for the refrigerated liquid
are connected in parallel to the boiler
system with suitable valves to prevent
the refrigerated liquid from entering the
boiler.
zThe pipe system of a boiler connected
to the heating coils of hot-air heating
systems that may be exposed to the
circulation of cooled air must be fitted
with a flow-control valve or some other
automatic system for preventing the
boiler water from circulating by gravity
during the cooling cycle.

Boiler installation 7
15
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
Supply connection
zInstall the elbow and the safety valve as shown in
Fig. 10.
Fig. 10 Supply connection
1Boiler
2Supply connection
3Safety valve
4Supply manifold pipe (factory-installed)
590° elbow (¾" NPT)
1
2
3
4
5
USER NOTE
Install the relief valve after the leak test
(ÎChapter 7.8, page 22).
The relief valve must be installed in a
vertical position.
The relief valve must also be installed in
accordance with the requirements of the
ANSI/ASME Boiler and Pressure Vessel
Code, Section IV.
USER NOTE
We recommend installing a dirt filter
(accessory) in the return connection to
reduce build-up of debris on the water
side.
USER NOTE
Observe the local regulations for
connection of boiler systems.
CAUTION!
FIRE DANGER
due to heat.
zNote that a minimum clearance of two
inches is required between pipes
carrying hot water and flammable walls
in the boiler room.

16 Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
We reserve the right to make any changes due to technical modifications.
Boiler installation7
7.5 Electrical connection
The electrical connections of the boiler must be
manufactured as specified by the local codes and the
current regulations of the National Electrical Code,
ANSI/NFPA–70.
In Canada the regulations of CSA C 22.1 Canadian
Electrical Code, Part 1, must be observed.
The boiler must be grounded as specified by the
regulations of the relevant local authorities; otherwise
follow the regulations of the National Electrical Code,
ANSI/NFPA–70.
Install an ON/OFF switch near the boiler.
zCheck that the heating system functions correctly
after any maintenance work.
USER NOTE
When making the electrical connections
follow the circuit diagrams on Îpage 67
and Îpage 68.
WARNING!
RISK TO LIFE
from electric shock.
zWhen conducting maintenance work
label all cables before disconnecting
them.
zIf cables are connected incorrectly the
system may not operate correctly with
possibly dangerous consequences.

Boiler installation 7
17
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
7.6 Installation of Logamatic 2107 control (accessory)
The boiler is fully functional with the factory-installed
aquastat. The Logamatic 2107 control can also be
installed in addition to the factory-installed aquastat.
1. Slide the insertion tabs of the control into the oval
openings.
2. Slide control toward the boiler front panel.
3. Push to snap plastic tabs of the control into the
knock-outs.
4. Remove top cover of control Remove screws from
the top cover.
5. Fasten control with sheet-metal screws.
6. Route boiler water sensor cable through the cable
opening and unroll to the required length.
USER NOTE
Note the following when making electrical
connections:
zLay out cables and capillaries carefully.
zDo not bend the capillaries during
installation.
zNever carry out any electrical work on
the heating system unless you are
licensed for this type of work. If you are
not a licensed electrician, have a
specialist electrical company make the
electrical connections.
zObserve the local regulations.
Fig. 11 Removing terminal cover
Fig. 12 Installation of Logamatic 2000 control system
1Screws
1

18 Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
We reserve the right to make any changes due to technical modifications.
Boiler installation7
Installation of boiler water sensor
7. Route boiler water sensor wiring bundle under the
front boiler cover to the measuring point (immersion
well). Discard quadrant filler apart from sensor
bundle.
8. Remove quadrant (blanking piece) from the
immersion well.
9. Insert the Honeywell boiler water sensor and
Logamatic sensor bundle into the immersion well to
the stop to replace the quadrant.
10. Press sensor clip (included with control) from the
side or from above to the head of the immersion well.
11. Carefully roll up unnecessary wiring and capillaries
and stow in the Logamatic 2107 control.
Power connection and connections of additional
components
Connect to the power supply as specified by the local
code.
12. Route all wiring to the control through the wiring
opening and connect as specified by the control
circuit diagram.
Install strain relief
Secure all wiring with wiring clips (included with control):
–Insert wiring clip with wiring from above into the slot
of the clip frame; the lever bar must point upwards
(step 1).
–Slide wiring clip down (step 2).
–Press (step 3).
–Move lever up (step 4).
Fig. 13 Front of boiler
1Measuring point (immersion well)
2Quadrant (blanking piece)
3Boiler water sensor (Logamatic 2107 control)
1
2
31
WARNING!
FIRE DANGER
Hot boiler components may damage
electrical wiring.
zMake sure that all wiring is routed in the
ducts or on outside the boiler insulation.
Fig. 14 Secure wiring with wiring clip
1

Boiler installation 7
19
We reserve the right to make any changes due to technical modifications.
Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
Installing panel components
13. Swivel display unit to the desired position.
14. Position terminal cover and screw to control.
Installing rear boiler cover
zSlide tabs of rear boiler cover under the front boiler
cover and press down at back.
zScrew rear boiler cover to rear panel of boiler.
Fig. 15 Swivel display unit
USER NOTE
We recommend positioning the display
unit straight on combinations with an
L-tank.
Fig. 16 Positioning terminal cover
Fig. 17 Installing rear boiler cover
1rear boiler cover
1
CAUTION!
SYSTEM DAMAGE
due to dirt.
If the boiler is assembled and not in use,
note the following:
zProtect the boiler connections from dirt
by closing the connections.

20 Installation and maintenance instructions Logano G334 X gas-fired boiler • Issue 09/2005
We reserve the right to make any changes due to technical modifications.
Boiler installation7
7.7 Gas supply connection
7.7.1 Installing gas feed
For the gas pipe diameter required for the installation
please see Tab. 4 and Tab. 5. Make sure that the pipe
fitting has the correct thread size.
Make sure that a sediment trap is installed at the inlet for
the gas supply pipe to the boiler. A hand stop valve must
be installed outside the boiler jacket if required by the
local code. We recommend installing a hand stop valve
in the main gas pipe to the boiler. The gas pipes must be
fastened outside the boiler.
The local codes must be observed during installation of
the gas connection, otherwise the regulations of the
National Fuel Gas Code, ANSI Z 223.1.
Tab. 4 Gas pipe supply volume
1 Maximum gas supply volume in cubic feet per hour, based on a
specific gas weight of 0.60 and a gas pressure of 0.5 psi or less
and a pressure gradient corresponding to a water column of
0.3 inches.
Fig. 18 Pipe connection to gas valves – back view
1Gas feed
2Main gas shut-off valve
3Sediment trap
4Retaining screws at the gas supply line
1
3
4
2
4
USER NOTE
The gas supply pipe is designed for a gas
connection on the right side.
zIf the gas feed is from the left, the gas
connection pipe must be completely
unscrewed, turned 180° and installed
again.
zCheck the connection for leaks.
zPlease support extenion gas piping to
relieve stress on gas train.
WARNING!
DANGER OF EXPLOSION
Leakage from the gas pipes and gas
connections may cause an explosion.
zUse soap solution to find leaks.
CAUTION!
SYSTEM DAMAGE
due to short-circuit.
zCover the hazardous locations before
checking for leaks.
zDo not spray the leak solution on wiring
openings, plugs or electrical
connections. Do not allow the solution
to drip on these locations.
Length
of pipe
in feet
Gas pipe supply volume in cubic feet of gas
per hour1
1" 1¼" 1½" 2" 2½"
10 520 1060 1600 3050 4800
20 350 730 1100 2100 3300
30 285 590 890 1650 2700
40 245 500 760 1450 2300
50 215 440 670 1270 2000
75 175 360 545 1020 1650
100 160 305 480 870 1400
150 120 250 380 710 1130