Cleaning The Heat Exchanger And Fitting The Burner - Viessmann Vitodens 333-F Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps

Cleaning the heat exchanger and fitting the burner

!
Please note
Scratches on parts that are in contact with flue gas can lead to corrosion.
Never use brushes to clean the heat exchanger.
1. Use a vacuum cleaner to remove
residues from the heat
exchanger A inside the combus-
tion chamber.
2. If required, spray slightly acidic,
chloride-free cleaning agents
based on phosphoric acid (e.g.
Antox 75 E) onto the heat
exchanger A and let the solution
soak in for approx. 20 min.
24
(cont.)
3. Thoroughly flush the heat
exchanger A with water.
4. Install the burner. Fit the nut with a
serrated washer and the remaining
nuts, then tighten them diagonally
with 4 Nm torque.
5. Fit the gas supply pipe with a new
gasket.
6. Check the gas connections for
tightness.
Danger
Escaping gas leads to a risk
of explosion.
Check all fittings for gas-
tightness.
7. Connect the electrical cables/leads
to each corresponding component.