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Buderus Logano GB125 BE User Manual

Buderus Logano GB125 BE
64 pages
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For contractors
Please read carefully prior
to installation and servicing.
CAUTION!
Observe the safety instructions of this installation
and maintenance manual before placing the boiler
in operation.
DANGER!
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.
If you require assistance or further information, con-
tact a qualified installer or an appropriate service
provider.
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
Maintenance Instructions
Oil condensing boiler
Logano GB125 BE US/CA
6 720 649 307 - 2011/07 US/CA

Table of Contents

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Buderus Logano GB125 BE Specifications

General IconGeneral
Installation TypeWall-mounted
Combustion SystemPremix Burner
Boiler TypeCondensing
Water ContentApprox. 3.5 liters
Max. Operating Pressure3 bar
TypeCondensing boiler
Fuel TypeNatural gas
EfficiencyUp to 98%
Standard EfficiencyUp to 98%
Modulation Range1:5

Summary

Safety Instructions and Explanation of Symbols

1.1 Safety instructions

Essential safety guidelines and precautions for operating the boiler and its system.

1.2 Explanation of symbols

Defines warning symbols, signal words, and notes used throughout the manual for clarity.

Product Description

2.1 Intended use

Details the primary applications and purpose of the boiler for central heating and domestic hot water.

2.2 Standards, regulations and code compliance

Outlines the installer's responsibility to adhere to all applicable federal, state, and local codes.

2.3 Notes on installation and operation

Provides key considerations for installation, operation, and compliance with local building codes and regulations.

2.4 Product description

Describes the boiler's main components including control panel, casing, boiler block, burner, and heat exchanger system.

2.5 Boiler water quality

Highlights the importance of water quality to prevent damage from scale formation and corrosion.

2.6 Tools, Materials and Accessories

Lists standard and recommended tools, materials, and accessories needed for installation and maintenance.

2.7 Scope of delivery

Details the components included in the boiler's delivery package and instructions for checking.

2.8 Dimensions and specifications

Presents detailed technical specifications and dimensional data for the boiler models.

2.9 Conditions for operation

Specifies operating conditions for reliability and service life, including boiler room, fuel, power, and hydraulic requirements.

2.10 Disposal

Provides instructions for environmentally responsible disposal of packaging and replaced system components.

Moving the Boiler

3.1 Reducing the boiler weight for handling purposes

Describes how to reduce boiler weight by removing the burner hood and door for easier handling.

3.2 Lifting and carrying the boiler

Explains safe methods for lifting and carrying the boiler, including grip positions and warnings.

3.3 Moving the boiler with hand truck

Details the procedure for safely moving the boiler using a hand truck, emphasizing secure loading.

Placing the Boiler

4.1 Wall clearances

Specifies the recommended and minimum wall clearances required around the boiler for safe installation and access.

4.2 Reversing the burner door

Provides instructions on how to change the burner door hinges from right-hand to left-hand opening.

4.3 Mounting the adjustable feet (included with B-kit)

Guides on installing and adjusting the feet to level the boiler, preventing air pockets.

4.4 Positioning and leveling the boiler

Details the final positioning and leveling of the boiler using adjustable feet and a level.

Installing the Boiler

5.1 Flue pipe installation

Covers flue pipe installation types and regulations for safe combustion air supply and flue gas routing.

5.2 Test ports

Explains the purpose and use of dedicated testing ports for flue gas and combustion air temperature readings.

5.3 Installation options

Presents approved flue gas systems and installation types available from Buderus for the boiler.

5.4 Making the water connections

Details the process of connecting the boiler's water supply and return lines, including safety precautions.

5.5 Filling the heating system and checking for leaks

Guides on filling the heating system, checking for leaks, and pressure testing, with safety warnings.

5.6 Connecting the fuel supply

Details the installation of the oil filter (Tigerloop) and connection of the fuel supply line according to local codes.

5.7 Bleed off condensate

Explains the installation and filling of the siphon and neutralizer for condensate drainage.

5.8 Electrical supply connections

Covers electrical connections, including installing the control panel and temperature sensor assembly.

5.9 Installing the back boiler cover

Describes the procedure for installing the control panel cover and the rear boiler top panel.

Starting Up the Heating System

6.1 Bringing the system up to operating pressure

Details how to fill the system, bleed air, and achieve the correct operating pressure before commissioning.

6.2 Testing safety valve

Explains the procedure for testing the safety valve to ensure it functions correctly and releases excess pressure.

6.3 Checking position of heat exchanger baffles

Instructs on checking and adjusting the heat exchanger baffles to ensure they are in the correct horizontal position.

6.4 Preparing the heating system for operation

Outlines the final steps to prepare the system for operation, including opening fuel supply and switching on power.

6.5 Starting up the control panel and the burner

Guides on turning on the control panel, resetting limits, and starting the burner according to instructions.

6.6 Taking measurements

Provides guidance on performing combustion tests and taking measurements after initial burner operation.

6.7 Checking the manual reset high limit (STB)

Explains how to check the function of the manual reset high limit (STB) for safety.

6.8 Installing the burner hood

Details the process of positioning and securing the burner hood onto the boiler casing.

6.9 Commissioning log

Provides a checklist for commissioning steps, including readings, dates, and confirmation.

Shutting Down the Heating System

7.1 Normal shut-down

Describes the standard procedure for safely shutting down the boiler and heating system using the control panel.

7.2 Shutting down the heating system in an emergency

Explains the emergency shutdown procedure, including using the emergency shut-off switch or circuit breaker.

Heating System Inspection

8.1 Why is regular maintenance important?

Explains the benefits of regular maintenance for efficiency, reliability, combustion, and service life.

8.2 Preparing the boiler for inspection

Outlines the necessary safety precautions and steps to prepare the boiler before commencing inspection.

8.3 Cleaning the boiler

Details methods for cleaning the boiler using brushes or a wet method, including safety precautions.

8.4 Cleaning the heat exchanger system

Guides on opening and cleaning the heat exchanger system, including removing baffles and access covers.

8.5 Cleaning the neutralizing system and trap

Provides instructions for cleaning the condensate siphon and neutralizing system, with safety warnings.

8.6 Checking the air supply hose

Describes how to inspect and clean the corrugated hose for combustion air supply.

8.7 Check heating system operating pressure

Details how to check the system pressure, add water if low, and ensure proper bleeding and expansion vessel function.

8.8 Test safety valve

Explains the procedure for checking the safety valve's function at regular intervals.

8.9 Concentric supply air and flue gas routing

Focuses on checking the combustion air supply and flue gas routing for issues like dirt, leaks, and blockages.

8.10 Air supply system

Advises checking the air supply system for blockages if CO2/CO levels are too high.

8.11 Inspection and maintenance reports

Provides forms for recording inspection and maintenance activities, including dates and signatures.

Troubleshooting

Correcting burner faults

Guides on how to correct burner faults, including resetting the burner and notifying a technician.

Examples of Installations

Explanation of abbreviations

Defines abbreviations used in the installation examples and diagrams for clarity.

Spare Parts

Boiler block and burner door

Lists part numbers for components of the boiler block and burner door, categorized by model.

Boiler outer casing

Provides a list of part numbers for components related to the boiler's outer casing.

Heat exchanger WT

Details the spare parts available for the heat exchanger (WT) system, including part numbers.

Wiring Diagrams

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