Buderus Logano G315 - User Manual

Other manuals for Buderus Logano G315

Questions and Answers

Dakota BrownJul 30, 2025

What to do if the Buderus Logano G315 burner refuses to start?

P
psosaJul 30, 2025
If the Buderus Boiler burner refuses to start after three attempts, avoid pressing the reset button more than three times in a row, as this could damage the burner ignition transformer. Consult the burner's technical documentation for reset instructions.

Summary

Key to Symbols and Safety

Key to Symbols

Explains warning symbols and keywords used to indicate risk levels in the manual.

General Safety Instructions

Provides essential safety guidelines covering emergencies, leaks, electrical hazards, and operator responsibilities.

Product Description

Correct Use

Defines the intended purpose of the Logano G315 boiler for heating and domestic water, and lists approved fuel types.

Certification and Testing Mark

States that the appliance meets applicable standards for US and Canadian markets.

Fill and Make-up Water

Explains the importance of water quality and types used for filling and topping up the heating system.

The Correct Fuel

Emphasizes using the correct fuel type and grade for proper operation, as specified by the installer.

System Start-up

Making the System Operational

Outlines checks before starting the system, including water pressure, fuel supply, and shutoff switches.

Check and Correct Operating Pressure

Details how to check and maintain the system's water pressure, including filling and bleeding procedures.

Start-up Control Panel and Burner

Explains how to start the boiler via the control panel and enable the burner for operation.

Shutting Down the System

Switching Off Control Panel and Burner

Describes how to shut down the boiler and burner via the main power switch or circuit breaker.

Shutting Down in an Emergency

Details emergency shutdown procedures using the emergency shutoff switch or circuit breaker.

Summary

Key to Symbols and Safety

Key to Symbols

Explains warning symbols and keywords used to indicate risk levels in the manual.

General Safety Instructions

Provides essential safety guidelines covering emergencies, leaks, electrical hazards, and operator responsibilities.

Product Description

Correct Use

Defines the intended purpose of the Logano G315 boiler for heating and domestic water, and lists approved fuel types.

Certification and Testing Mark

States that the appliance meets applicable standards for US and Canadian markets.

Fill and Make-up Water

Explains the importance of water quality and types used for filling and topping up the heating system.

The Correct Fuel

Emphasizes using the correct fuel type and grade for proper operation, as specified by the installer.

System Start-up

Making the System Operational

Outlines checks before starting the system, including water pressure, fuel supply, and shutoff switches.

Check and Correct Operating Pressure

Details how to check and maintain the system's water pressure, including filling and bleeding procedures.

Start-up Control Panel and Burner

Explains how to start the boiler via the control panel and enable the burner for operation.

Shutting Down the System

Switching Off Control Panel and Burner

Describes how to shut down the boiler and burner via the main power switch or circuit breaker.

Shutting Down in an Emergency

Details emergency shutdown procedures using the emergency shutoff switch or circuit breaker.

The Buderus Logano G315 is a low-temperature oil/gas boiler designed for space heating and domestic water heating, utilizing either an indirect tank or a heat exchanger. This appliance is built with a strong emphasis on ease of operation, incorporating the latest technologies and safety regulations. It is suitable for operation with oil, gas, and dual-fuel burners, and can be controlled by an aquastat, the Logamatic 4000, Hydrolevel Hydrostat®, or other compatible control systems. The Logano G315 has been tested and certified, meeting all applicable standards for both US and Canadian markets.

Function Description:

The core function of the Logano G315 is to generate heat efficiently. It comprises a boiler block, which is responsible for transferring heat from the burner to the heating water. This heat transfer is crucial for maintaining desired temperatures in the heating system. The boiler shell, along with 3-inch thermal insulation, encases the boiler block to prevent energy loss, ensuring economical operation. A separate control panel, sold independently, is designed to monitor and control all electrical components of the boiler, facilitating its operation and ensuring safety.

Important Technical Specifications:

While specific numerical values for output and other detailed technical specifications are not fully provided in the excerpt, several critical aspects are highlighted:

Fuel Compatibility: The Logano G315 is versatile, capable of operating with oil, gas, and dual-fuel burners. The correct type and grade of fuel are essential for proper operation, and the heating contractor is responsible for specifying this information.
Water Quality Requirements: The system's longevity and efficiency are heavily dependent on the quality of the fill and make-up water. Water containing substances like calcium hydrogen carbonate (Ca(HCO3)2) can lead to corrosion, scale formation, or deposits, which can negatively impact the system's service life and efficiency. The manual provides specific guidelines for maximum fill and make-up water quantity based on overall boiler output (MBH/kW) and Ca(HCO3)2 concentration (grains per gallon/mol/ppm). For example, for a boiler output between 341 and 1,194 MBH (100 and 350 kW), the Ca(HCO3)2 concentration should be ≤ 11.7 grains per gallon (≤ 200 ppm). The heating water pH value should ideally be between 8.2 and 9.5. The maximum fill and make-up water quantity is generally three times the system volume. Formulas are provided to calculate the maximum quantity based on MBH or kW and Ca(HCO3)2 concentration.
Operating Water Pressure: The minimum operating water pressure for the system must be at least 15 psi (1 bar). Regular monitoring of this pressure is crucial for the system's functionality.
Temperature Control: The boiler is designed to operate at low temperatures, contributing to its efficiency.

Usage Features:

System Start-up: Before commissioning, users must ensure the operating water pressure is correct, fuel is supplied and the main shut-off valve is open, and the emergency shutoff switch is ON. The heating contractor should demonstrate the location of the fill valve. The process involves slowly filling the system via the on-site fill valve, observing the pressure gauge, bleeding the system via purge valves, and adding more fill water if needed.
Control Panel Operation: The boiler is started via its control panel, which also enables the burner. For Logamatic 4000 users, this involves setting the boiler water thermostat to "AUT." and the ON/OFF switch to "I" (ON). For Hydrolevel Hydrostat® users (oil applications only), settings are displayed on a dynamic display, and users select the operation mode (cold or warm start) using limit switches.
Emergency Shut-down: In emergencies, the system should be shut off using the emergency shutoff switch or by disengaging the heating system circuit breaker. In other dangerous situations, the main fuel shut-off valve should be closed, and the power supply disconnected.
Fault Correction: Heating system faults are indicated on the control panel display, and burner faults are shown by a fault lamp on the burner. The primary method for correcting a burner fault is to press the burner reset button. However, users are warned not to press the reset button more than three times in succession to avoid damaging the ignition transformer. If the burner does not restart after three attempts, further technical documentation for the burner should be consulted.

Maintenance Features:

Regular Maintenance: Heating systems require regular maintenance to ensure high efficiency, economical operation, operational safety, and clean combustion. It is recommended that customers sign a maintenance and inspection contract with a trained and certified contractor for annual and demand-dependent maintenance.
Water Quality Monitoring: Regular monitoring and treatment of fill and make-up water quality are essential to prevent corrosion and scale formation. If the water does not meet system-specific requirements, it must be treated by a trained and certified installer.
Leak Checks: After filling the system, it is important to check for leaks and ensure the expansion vessel is operating correctly. Frequent refilling of the system may indicate leaks or other issues.
Frost Protection: If the system is out of service for an extended period, especially due to a fault shutdown, there is a risk of freezing. To protect against frost damage, the heating water should be drained at the lowest point in the system by opening the purger at the highest point.
Spare Parts: Only original Buderus spare parts should be used for repairs to prevent system damage and maintain warranty validity.
Professional Intervention: Installation, adjustment, modification, operation, or maintenance by an unqualified person can lead to personal injury or property damage. All such work should be carried out by trained and certified service companies, service providers, or gas companies.
Disposal: Packaging and replaced heating system components should be disposed of in an environmentally responsible manner at an authorized disposal site.