Shutting Down The Heating System For An Extended Period; Restarting The System - Viessmann VITOFLEX 300-UF Operating Instructions Manual

Shutting down the heating system for an extended period

1. Switch off the system with the
The control unit switches the system off automati-
cally.
For the Automatic shutdown function, see
page 38.
2. Warning
There is a risk of deflagration when the com-
bustion chamber door is opened. Poking
around in the firebed leads to oxygenation,
which can produce a flash. Both can result in
severe burns.
Never open the combustion chamber door
during operation.
Before opening the combustion chamber
door, ensure that you are standing in a safe
place.
Never poke around in the firebed.
Allow the existing firebed to burn out completely.
Cleaning and checking the combustion chamber
Note
Always clean and check the entire combustion cham-
ber at the end of the heating season.
Pay particular attention to the following combustion
chamber components and parts:
1. Clean off any slag deposits and ash from the sec-
ondary air apertures.
2. Check the ash removal zones under the grate
through the maintenance cover. Remove all ash.

Restarting the system

1. Switch ON the mains isolator on the control panel.
button. 3. Open the combustion chamber door.
4. Allow the combustion chamber time to cool down.
5. Switch off the system at the control panel using the
3. Check the grate elements for damage and clean
4. Have damaged grate elements replaced by the
5. Check the flanged connections of the fuel supply
6. Tighten any slack screws.
7. Replace damaged gaskets.
2. Switch ON the system, see page 15.
mains isolator.
them.
Technical Service department.
system.
Decommissioning
37