18
5584 109 - 10
Vitocrossal 200 CM2 186 to 311 Service
Cleaning the combustion chamber and heating surfaces
Thoroughly clean the combustion chamber and heating
surfaces with a water jet.
Note:
Scratches on parts that are in contact with flue gas
can lead to corrosion. Only use plastic brushes, not
wire brushes nor sharp objects.
For normal cleaning, flush the heating surfaces thoroughly
with a water jet. You may use cleaning agents if you
notice stubborn residues, surface discoloration or soot
deposits. 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.
Note:
The cleaning agent must not contain
hydrocarbon-based solvents or potassium.
Follow the cleaning agents instructions.
■
Remove deposits of combustion by-products with
alkaline agents containing tenside.
■
Remove coatings and surface discoloration (yellowish
brown) with phosphoric acid-based Antox 75 E Plus or
citric acid-based CitiSurf 3050 (by Stellar Solutions Inc.
■
Rinse thoroughly with water.
Checking gaskets and thermal insulation parts
1. Check gaskets and the sealing rope in the boiler door
for
damage.
2. Check the thermal insulation components of the boiler
door for possible damage.
3. Replace any damaged parts.
Checking all connections for leaks
1. Check all connections on the heating water side and
sensor
well
A
for leaks.
Note:
Also check the connections to control equipment
and to the minimum pressure switch (low water
indicator) for leaks.
Shutting down the system
1. Switch OFF the main circuit breaker or the power supply
and safeguard against unauthorized reconnection.
2. Remove the boiler front cover.
3. Release burner cables with plug
fA
and
lÖ
from the
burner control unit and route them out of the burner
casing.
4. Close the gas shut-off valve.
Opening the boiler door
1. Remove the gas supply pipe.
2. Undo the four screws on the boiler door and open
the
door.
Note:
Scratches inside the combustion chamber can lead
to corrosion. Never put tools or other objects into
the combustion chamber.
Separating the neutralizing system (if installed) from the
boiler and connecting the drain hose
1. Separate hose
A
to the neutralizing system from
siphon
B
.
2. Connect drain or cleaning hose
C
to the siphon and
run it to the drain.
Steps – Commissioning, Inspection and Maintenance
(continued)
WARNING
Mains voltage can be extremely dangerous.
For maintenance work, isolate the system from the
power supply.
Commissioning, Inspection and Maintenance