Buderus SB735 Series - User Manual

Other manuals for Buderus SB735 Series

Installation And Maintenance Manual32 pages

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Summary

For Your Safety

General Safety Directives

Outlines fundamental safety rules to be followed during operation and maintenance of the boiler.

Safe Working Practices on the System

Specifies safety protocols for installation, maintenance, and repair work by specialists.

System Start-up

Commissioning the Control Device and Burner

Provides instructions for the initial setup and activation of the control device and burner.

System Shutdown

Emergency Shutdown Procedures

Outlines the steps for shutting down the system in urgent or dangerous situations.

System Maintenance

Importance of Regular Servicing

Explains why consistent maintenance is crucial for system efficiency, reliability, and combustion.

Checking and Correcting Water Pressure

Details the process for monitoring and adjusting the heating system's water pressure for safe operation.

Summary

For Your Safety

General Safety Directives

Outlines fundamental safety rules to be followed during operation and maintenance of the boiler.

Safe Working Practices on the System

Specifies safety protocols for installation, maintenance, and repair work by specialists.

System Start-up

Commissioning the Control Device and Burner

Provides instructions for the initial setup and activation of the control device and burner.

System Shutdown

Emergency Shutdown Procedures

Outlines the steps for shutting down the system in urgent or dangerous situations.

System Maintenance

Importance of Regular Servicing

Explains why consistent maintenance is crucial for system efficiency, reliability, and combustion.

Checking and Correcting Water Pressure

Details the process for monitoring and adjusting the heating system's water pressure for safe operation.

The Buderus SB735 Series is a condensing gas boiler designed for heating domestic hot water and central heating in multi-occupancy, public, and commercial buildings. This operating manual, dated 10/2003, provides essential information for the safe, correct, and efficient operation and maintenance of the system.

Function Description:

The SB735 boiler functions by transferring heat generated by a burner to heating water within its boiler block. The burner door is integral to this process, supporting the burner and sealing the combustion chamber. The system is equipped with a control device (optional) that monitors and controls all electrical components, facilitating system start-up and shutdown. The boiler is designed to operate with specific fuel types, which are identified and entered into a table by the system installer during commissioning to ensure proper and safe operation.

Important Technical Specifications:

The manual emphasizes the importance of correct fuel type for the SB735 boiler. While specific fuel types are not listed in detail, the document states that the system installer will specify the required fuel. The boiler's components include a boiler block with thermal insulation and a burner door, boiler jacket panels, and an optional control device. The SB735 is designed to meet basic requirements of relevant standards and guidelines, with its conformity verified and associated documents available from the manufacturer.

Usage Features:

The SB735 is designed for user-friendly operation, but adherence to safety instructions is paramount.

System Start-up: Before operation, users must verify the system water pressure, ensure the main fuel supply shut-off valve is open, and confirm that the heating system emergency stop switch is activated or the boiler room fuse is inserted. The boiler is started via the control device, which also automatically commissions the burner. The boiler water thermostat should be set to "AUT," and the On/Off switch to "I" (ON).
Water Quality: The system uses water as a heat transfer medium. The manual distinguishes between "heating water" (water within the system), "fill water" (for initial filling), and "make-up water" (for re-filling due to losses). Water quality is critical, as substances like calcium hydrogen-carbonate can lead to corrosion, scaling, and deposits. Users are advised to check water consistency regularly and treat fill and make-up water if it does not meet system-specific requirements. The manual provides a table with requirements for filling, make-up, and heating water, including total rated boiler output, Ca(HCO3)2 concentration, maximum fill and make-up water volume, and heating water pH value (8.2-9.5).
Water Pressure: The system water pressure must be sufficient for safe and correct function. For new systems, water pressure should be checked daily initially, then at increasing intervals, as make-up water releases gases, potentially forming air pockets. For sealed systems, the pressure gauge needle should be within the green range, and the red needle set to the required system pressure. If the pressure is too low, make-up water must be added.
System Shutdown: For normal shutdown, the boiler is turned off via the control device by setting the On/Off switch to "0" (OFF), which also shuts down the burner. In emergencies, the main fuel shut-off valve and electrical power supply should be isolated via the boiler room main fuse or emergency stop switch.
Burner Faults: Faults are indicated on the control device display. If the burner develops a fault, a fault lamp on the burner and an indicator on the control device may illuminate. Users should press the burner reset button. However, if the burner fails to start after three attempts, further attempts to clear the fault by pressing the reset button should be avoided to prevent damage to the ignition transformer, and a specialist should be contacted.

Maintenance Features:

Regular maintenance is crucial for the SB735 boiler to ensure optimal efficiency, economical operation, high operational reliability, and environmentally responsible combustion.

Annual Inspection: The heating system should be inspected, cleaned, and maintained annually by a specialist contractor. The manual recommends entering into an annual inspection and maintenance contract.
Frost Protection: If the system is out of use, especially during periods of freezing temperatures, it must be protected against frost damage. This may involve draining the heating water from the lowest point in the system via the boiler drain, after opening the air vent valve at the highest point.
Neutralizing System: Maintenance work on the neutralizing system should only be carried out by specialists, following separate maintenance instructions.
Leak Checks: The heating system should be checked for leaks, and the function of the expansion vessel should be verified.
Ventilation: Adequate ventilation and exhaust air openings must be maintained, and should never be restricted or closed, to prevent dangerous flue gas leaks and poisoning.
Combustion Air Quality: To prevent boiler damage, chlorinated cleaning agents or halogenated hydrocarbons should not be used near the boiler. Dusty atmospheres should be avoided, and laundry should not be hung to dry in the boiler room, as contaminated combustion air can cause issues.
Flammable Materials: Flammable materials or liquids must never be stored in the immediate vicinity of the heat generator to prevent fire risks.

The manual strongly advises users to have their heating contractor install and maintain the system and provide proper training on its use. In case of gas leaks, immediate evacuation, closing the main gas shut-off valve, opening windows and doors, and contacting gas suppliers and heating engineers from outside the building are critical steps.