Shutting Down The System; Opening The Boiler; Cleaning The Combustion Chamber And Heating Surfaces; Checking The Gaskets And Thermal Insulation Sections - Viessmann Vitocrossal 200 Series Service Instructions Manual

Shutting down the system

1. Switch OFF the mains isolator or the power supply,
and safeguard against unauthorised reconnection.
Danger
Mains voltage can be life threatening.
Ensure that the system is not 'live' during
maintenance work.

Opening the boiler

1. Pull the front panel forward until it locks in place.
Loosen the locking screws but do not remove
them. Remove front panel.
2. Unlock the slide bolts on the right and left and fold
up the front top panel.
3. Push left or right side panels backwards.
Note
If necessary, gently lift side panels and remove.
4. Unplug the cables from the burner control unit as
necessary.
5. Remove the gas supply pipe.

Cleaning the combustion chamber and heating surfaces

Thoroughly clean the combustion chamber and heat-
ing surfaces with a water jet.
!
Please note
Scratches on parts that come into contact with
flue gas can corrode.
Only use plastic brushes, no wire brushes or
sharp objects.
For cleaning, flush the heating surfaces thoroughly
with a jet of water. For stubborn residues, surface
stains or soot deposits, cleaning agents can be used.
For this, observe the following:
Only use solvent-free cleaning agents. Ensure that
■
no cleaning agent gets between the boiler body and
the thermal insulation.
■ Remove soot deposits with an alkaline cleaning
agent with surfactant additive (e.g. Fauch 600).

Checking the gaskets and thermal insulation sections

1. Check the gaskets and packing cords in the boiler
door for damage.
Commissioning, inspection, maintenance
2. Close the gas shut-off valve.
6. Where present, remove the ventilation air pipe.
7. Undo 7 screws on the boiler door. Open boiler door
with burner.
Note
Secure boiler door against unintentional closure.
!
Please note
Scratches inside the combustion chamber can
lead to corrosion.
Never place tools or other objects inside the
combustion chamber.
Remove coatings and surface discolouration (yellow-
■
brown) with slightly acidic, chloride-free cleaning
agents based on phosphoric acid (e.g. Antox 75 E).
■ Remove loose deposits from the boiler; thoroughly
flush the heating surfaces and the flue gas collector
with a water jet.
Cleaning agent manufacturer's instructions
Note
For example "Fauch 600", "Antox 75 E" or Sotin 270
Manufacturer:
■ Hebro Chemie GmbH
Rostocker Strasse 40
D-41199 Mönchengladbach
■ Sotin GmbH
Industriestraße 6
D-55543 Bad Kreuznach
2. Check the thermal insulation components on the
boiler door for damage.
3. Replace any damaged components.
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