Back

Gas-Fired Condensing Boilers: Greenstar FS/Combi FS Inspection and Maintenance

This general maintenance procedure also serves as an inspection form. Maintenance is required for a long service life of the appliance, for effficient and economical operation, and to keep the environmental impact as low as possible.
MaintainX
10/24/2021

Gas-Fired Condensing Boilers: Greenstar FS/Combi FS Inspection and Maintenance

This general maintenance procedure also serves as an inspection form. Maintenance is required for a long service life of the appliance, for effficient and economical operation, and to keep the environmental impact as low as possible.

    Annual service and maintenance is required for a long service life of the appliance, for efficient and economical operation, and to keep the environmental impact as low as possible. Owners/operators are encouraged to sign a service and maintenance contract with a trained and certified installer for annual servicing and maintenance of the boiler.

    DANGER: Explosion!

    DANGER: Risk of flue gas poisoning.

    DANGER: Risk of electric shock!

    NOTICE: Insufficient antifreeze can accelerate corrosion.

    Heat exchanger block inspection and cleaning

    NOTICE: Damage to the coating of the heat exchanger.

    Heatronic boiler control

    In case of a component defect, a fault is shown on the display. The Heatronic boiler control monitors all safety and control components.

    NOTICE: The Heatronic boiler control can be damaged by leaking water.

    The following analytical tools are needed for service and maintenance:

    After the inspection/maintenance:

    Description of various steps

    Calling up the latest fault (service function 6.A)

    Fresh water filter (only combi boiler ZWB..-3A)

    • Screenshot2021-02-20at10.29.38AM.png

    Plate type heat exchanger (only combi boiler ZWB..-3A)

    If the DHW output on the combi boiler is significantly reduced:

    To remove the plate type heat exchanger:

    • Screenshot2021-02-20at10.31.23AM.png
    • Screenshot2021-02-20at10.31.58AM.png
    • Screenshot2021-02-20at10.32.42AM.png
    • Screenshot2021-02-20at10.33.08AM.png

    ▶ Remove the plate type heat exchanger.

    • Screenshot2021-02-20at10.58.10AM.png

    Checking the electrodes

    • Screenshot2021-02-20at11.01.39AM.png
    • Screenshot2021-02-20at11.02.02AM.png

    Burner servicing

    • Screenshot2021-02-20at11.02.43AM.png
    • Screenshot2021-02-20at11.03.12AM.png

    Heat exchanger block inspection and cleaning

    NOTICE: Damage to the coating of the heat exchanger.

    If mechanical cleaning is required:

    For cleaning the heat exchanger, use Bosch main heat exchanger gaskets, the heat exchanger brush and the heat exchanger cleaning blade which are available as spare parts.

    • Screenshot2021-02-20at11.06.25AM.png
    • Screenshot2021-02-20at11.06.57AM.png
    • Screenshot2021-02-20at11.07.24AM.png
    • Screenshot2021-02-20at11.08.35AM.png

    ▶ Clean the condensate tray (with reversed brush).

    • Screenshot2021-02-20at11.09.34AM.png

    Condensate trap cleaning

    ▶ Remove condensate trap (steps 1 and 2) and check heat exchanger orifice for clear passage.

    • Screenshot2021-02-20at11.10.35AM.png

    Checking the mixer diaphragm

    • Screenshot2021-02-20at11.47.09AM.png

Please note that any procedure, checklist, or other document available in the MaintainX Procedure Hub is provided for general education and information only and does not constitute legal, medical, or financial advice. MaintainX makes the materials available AS IS and AS PROVIDED, without warranties of any kind. By downloading or using any such materials, you assume the risk that they may not be appropriate for your specific situation and agree that you are solely responsible for any such use, including compliance with applicable law and with meeting any conditions of product warranties.