What to do if Weishaupt WTC-GB 90-A Boiler shows warning code W12?
If your Weishaupt Boiler displays warning code W12, it indicates that the temperature at eSTB exceeds 95 °C, the temperature at the supply sensor is above 95 °C, or the temperature at the return sensor is above 95 °C. To resolve this, you should: * Check the water flow. * Verify the functionality of the pumps. * Examine parameter A32. * Vent the boiler on the water side.
General| Category | Boiler |
|---|---|
| Model | WTC-GB 90-A |
| Manufacturer | Weishaupt |
| Type | Condensing Boiler |
| Fuel Type | Natural Gas/Propane |
| Max. Nominal Heat Output (Natural Gas) | 90 kW |
| Max. Nominal Heat Output (Propane) | 90 kW |
| Standard Efficiency | 98% |
| NOx Emission Class | 5 |
| Max working pressure | 6 bar |
| Max temperature | 90°C |
| Voltage | 230 V |
| Protection class | IPX4D |
| Flue gas temperature | Approx. 40-70°C |
Guide to using the boiler, covering symbols and target audience.
Conditions excluding warranty and liability claims for damage.
Defines intended use, limitations, and installation environment for the boiler.
Immediate safety actions required in case of gas odor detection.
Procedures to follow if flue gas is detected.
General and specific safety precautions for boiler operation and maintenance.
Guidance for environmentally responsible disposal of materials.
Explanation of the boiler's model designation and its meaning.
Overview of the boiler's operational principles and internal components.
Identification and labeling of the boiler's main physical parts.
Identification and labeling of the boiler's electrical components.
Detailed description of each safety mechanism and its function.
Step-by-step outline of the burner's ignition and operation cycle.
Information on certifications and standards the boiler complies with.
Specifications for voltage, power consumption, and electrical protection.
Recommended operating and storage temperatures and humidity.
Lists the types of fuel the boiler is designed to use.
Data on the boiler's emission levels according to relevant standards.
Technical data regarding the boiler's heat output and performance.
Details about the heat exchanger's capacity and operating parameters.
Specifications related to flue gas output and connections.
Product efficiency data according to energy-saving regulations.
Physical dimensions and connection points of the boiler unit.
The empty weight of the boiler unit.
Instructions for removing the front panel for access.
Guidance on securing the unit for transportation.
Requirements for the room where the boiler will be installed.
Specifies the required space around the boiler for installation and service.
Instructions for leveling the boiler using its adjustable feet.
Specifies the quality and treatment needed for heating water.
Details water hardness limits and treatment based on fill quantity.
Table estimating water required for different heating system types.
Procedures for de-ionisation and pH stabilization of water.
Instructions for connecting the boiler to the heating system's pipework.
Procedures for connecting the condensate drain and filling the siphon.
Requirements and procedures for connecting the natural gas supply.
Guidelines for air intake and flue gas exhaust ducting.
Instructions for safely connecting the boiler's electrical systems.
Overview of the boiler's control panel and its elements.
Description of the physical controls on the boiler's operating panel.
Explanation of the information shown on the boiler's display screen.
Accessing and viewing information relevant to the end-user.
How users can adjust basic boiler settings.
Accessing advanced settings and information for technicians.
Displaying system values and sensor readings in the heating engineer level.
Accessing and modifying boiler parameters for configuration.
Procedure for manually initiating boiler operation or setting output.
Guide for initial setup and matching settings to the system.
Description of different control strategies like weather compensation.
Information on controlling the central heating circulation pump.
How the boiler protects itself and the system from freezing.
Explanation of how inputs and outputs can be configured for various applications.
Advanced parameters for fine-tuning boiler performance to the system.
Activating and deactivating the function for chimney sweeping.
Checks and conditions that must be met before commissioning.
Procedure to test the gas system for leaks.
Verifying that the gas supply pressure is within the correct range.
Steps for configuring the boiler and setting parameters during initial setup.
Process for checking and setting the O2 content for optimal combustion.
Final checks and documentation required after commissioning.
Procedure for converting the boiler to operate with LPG.
Formulas and steps to calculate the actual burner output.
Instructions for safely switching off the boiler for extended periods.
List of vital safety components and their replacement lifetimes.
How to set the service interval and reset the service indicator.
Procedure to test the air pressure switch functionality.
Steps for replacing ignition and ionization electrodes.
Instructions for accessing, cleaning, and replacing the burner tube.
Procedures for cleaning the heat exchanger and condensate collector.
Testing the flue gas pressure switch operation.
Procedure to test the gas pressure switch.
Instructions for removing and reinstalling the fan unit.
How to interpret and address warnings and faults displayed by the boiler.
Accessing and reviewing past fault records and system status.
Detailed tables for troubleshooting warning and error codes.
Common operational issues and their rectifications.
Exploded diagrams and part lists for ordering replacement components.
Wiring diagrams illustrating the electrical connections within the boiler.
Tables showing resistance values for sensors at different temperatures.
Diagrams illustrating pneumatic connections for pressure switches.
Table for converting O2 percentage to CO2 percentage.
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