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General| Energy Efficiency Class | A |
|---|---|
| Model | Vitodens 100-W B1KA 125 |
| Heat Exchanger Material | Stainless steel |
| Mounting | Wall-mounted |
| Type | Wall-mounted condensing boiler |
| Efficiency | Up to 98% |
| Fuel Type | Natural gas/LPG |
| Input Rating | 35 kW |
| Water Pressure | Max. 3 bar |
| Max. Water Temperature | 80°C |
Covers critical safety, installation, and warranty guidelines for proper operation.
Stipulates that installation, adjustment, and service must be performed by a licensed professional.
Details the procedures for securely mounting the boiler to various wall types.
Outlines compliance with local and national codes for gas and electrical installations.
Lists acceptable wall-mounting surfaces for the boiler.
Provides instructions for installing the mounting bracket on brick/concrete walls.
Details the process of mounting the bracket onto wood studs.
Instructs on how to hang the boiler onto the installed mounting bracket.
Details the process of mounting the bracket onto metal studs.
Further guidance on gas connection, including unions, drip legs, and shutoff valves.
Details requirements and procedures for making the gas connection according to codes.
Explains how to safely perform a pressure test on the gas piping system.
Guides on properly installing the pressure relief valve and its discharge pipe.
Step-by-step guide on how to safely remove the boiler's front cover for access.
Instructions for accessing internal components by rotating the control unit and opening modules.
Details how to connect a room thermostat using dry contacts to the boiler control.
Guides on connecting the outdoor temperature sensor for weather-compensated operation.
Explains the connection of a 24VAC room thermostat, potentially with a switching relay.
Explains how to connect an OpenTherm device for advanced boiler control.
Guides on filling the heating system and purging air for optimal operation.
Details how to verify the electrical power supply connection to the boiler.
Step-by-step instructions for filling the boiler's heat exchanger and bleeding air.
Details how to measure the static gas pressure at the boiler's inlet.
Explains how to measure running gas pressure under high-fire conditions and corrective actions.
Emphasizes the importance of combustion analysis for safety and system condition.
Details the steps to safely remove the boiler's burner assembly for maintenance.
Instructs to perform a gas leak test after reinstalling the burner assembly.
Details how to inspect, clean, adjust, and replace ignition and ionization electrodes.
Details how to check the expansion tank pre-charge and system fill pressure.
Highlights the critical step of leak testing gas supply piping before boiler operation.
Instructions for refitting the burner assembly, including torquing screws and connecting gas lines.
Outlines the initial steps for diagnosing system faults and issues.
Illustrates the boiler's start-up sequence and potential faults at each stage.
Provides a comprehensive table of fault codes, their causes, and corrective measures.
Explains how to reset the burner control unit after a fault.
Details how to test the boiler temperature sensor's resistance against a curve.
Guides on testing the outdoor temperature sensor's resistance using a provided curve.
Details how to test the continuity of the fixed high limit switch and replace if faulty.
Guides on testing the DHW outlet temperature sensor on B1KA models.
Guides on testing the flue gas temperature sensor resistance against a curve.
Details testing the DHW tank temperature sensor on B1HA models.
Crucial safety warnings regarding fire, explosion, and gas leaks before operating the appliance.
