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Vitodens 100-W, B1HE/B1KE Combi Installation/Service
IMPORTANT
Scratches to the surfaces of the heat exchanger that
come into contact with hot gas can result in corrosion
damage. Brushing can cause deposits to become lodged
in the gaps between the coils.
Do not use brushes to clean the heating surfaces.
Prevent damage due to cleaning water. Cover electronic
components with suitable watertight material.
Note: Discoloration on the heat exchanger surface is a
normal sign of use. It has no bearing on the function
or service life of the heat exchanger.
The use of chemical cleaning agents is not required.
Cleaning the Heating Surfaces
IMPORTANT
Service
WARNING
Follow cleaning agent manufacturer’s safety
instructions and wear appropriate protective equipment.
WARNING
Never use a metal wire brush or mechanically driven
brushes.
1. Remove burner assembly and reinstall upon
completion of service work as per the instructions
on page 50 in this manual.
2. Clean the combustion chamber A by vacuuming
loose debris out.
3. Remove embedded sediment from the stainless steel
heat exchanger surface by thoroughly rinsing with
water or cleaning agents such as Axiom Industries
“Clean F Steel”. Follow Axiom handling and application
instructions when using cleaning agent.
Avoid getting the refractory wet during cleaning.
Note: Discoloration of the heat exchanger surface
is the normal result of the combustion process.
It has no impact on the functionality or the
longevity of the heat exchanger.
4. If the gaps between the heat exchanger coil windings
are plugged, carefully remove debris without
scratching the heat exchanger surface using the
Viessmann tool specific for this purpose.
Tool part number 7858492;
Replacement blade part number 7840346.
5. Flush the combustion chamber A with water until it
runs clear through the condensate trap.
6. Remove and clean out any accumulated debris from
condensate trap. Reinstall condensate trap.
See page 55 for details.
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