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General| Type | Wall-mounted gas condensing boiler |
|---|---|
| Modulation range | 1:4 |
| Efficiency | Up to 98% (Hs)/109% (Hi) |
| Energy efficiency class | A |
| Flue gas connection | 60/100 mm |
| Max. Heat Input | 35 kW |
| Control Unit | Vitotronic 100 |
| Fuel Type | Natural Gas / LPG |
Type WB1B, 9.0 to 35.0 kW wall mounted gas fired condensing boiler, natural gas and LPG version.
Explanation of danger symbols, notes, and target group for qualified personnel.
Legal instructions regarding accident prevention, environmental protection, and applicable safety regulations.
Danger and measures to take if gas is detected, including evacuation and shutting off supply.
Danger and measures to take if flue gas is detected, including ventilation and shutting off the system.
Procedures for safely working on the gas and electrical systems, including isolation.
Guidelines for replacing components and using genuine Viessmann spare parts.
Caution regarding untested parts and unauthorized modifications affecting safety and warranty.
Details about the Vitodens 100-W, WB1B, set up for natural gas operation.
Instructions for preparing the boiler installation, including dimensions and connections.
Table detailing rated output range and corresponding dimensions (a) in mm.
Step-by-step guide for fitting the wall retainer using an installation template.
Steps for preparing water, gas, and electrical connections, including IEEE standards.
Procedure for removing the front panel and mounting the boiler onto the wall retainer.
Reference to separate instructions for fittings on the heating water and DHW sides.
Instructions for connecting the safety valve drain and gas supply, including leak tests.
Connecting the condensate drain and filling the siphon with water.
Connecting the balanced flue and opening the control unit.
Overview of electrical connections, accessory connections, and outside temperature sensor installation.
Steps for routing connecting cables and closing the control unit, noting cable temperature limits.
List of commissioning, inspection, and maintenance steps with corresponding page numbers.
Detailed instructions for filling the heating system, including water quality requirements.
Procedure for venting the boiler and adjusting the circulation pump.
Procedure for checking and adjusting the CO2 content for upper and lower outputs.
Steps for burner removal and checking the burner gasket and gauze assembly.
Steps for checking and adjusting electrodes.
Procedure for cleaning the heat exchanger.
Steps for checking the condensate drain and cleaning the siphon.
Procedure for installing the burner, including torque settings and connections.
Checking gas equipment tightness and fitting the front panel.
Requirement for the system installer to hand over operating instructions and instruct the user.
Flowchart illustrating the boiler's function sequence and potential faults with corresponding measures.
Table listing fault codes, causes, and recommended measures for various error conditions.
Instructions on how to reset the control unit by turning the rotary selector to 'RESET'.
Steps for removing the front panel and accessing the outside temperature sensor.
Procedures for checking and replacing outside, boiler water, cylinder, and outlet temperature sensors.
Procedure to check the temperature limiter and flue gas temperature sensor.
Steps for replacing the flow limiter and checking/repairing the plate-type heat exchanger.
Procedure for checking fuse F4 after opening the control unit casing.
Steps to remove the gas restrictor and fit the gas train with new gaskets.
Adjusting the control unit for natural gas or LPG operation and saving the setting.
Reference to 'Checking the CO2 content' on page 22 for burner adjustment.
Explanation of weather-compensated mode and heating curves based on outside temperature.
Schematic diagram illustrating the electrical connections and components of the boiler.
Legend and list of components referenced in the connection and wiring diagram.
List of spare parts with item numbers and descriptions for ordering.
Diagrams showing burner, heat exchanger, hydraulic, and control unit components.
Technical specifications for gas fired condensing boiler and combi boiler models.
Statement of conformity with standards and directives for the Vitodens 100-W.
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