Maintenance; Cleaning The Flue Gas Circuit; Cleaning The Combustion Chamber - Potterton NXR4i Installation And Service Manual

7. Checking and maintenance

7.3 Maintenance

The boiler will only operate efficiently if the exchange
surfaces are kept clean.
The boiler should be cleaned as soon as required and as the
chimney, at least once a year or more, depending upon applicable
regulations and specific needs.
7.3.1

Cleaning the flue gas circuit

- Remove the upper front panel.
- Take off the lower panels.
- Open the sweeping doors (upper doors) by unscrewing the 3 nuts
using a 19 mm spanner.
- Remove the baffle plates from the upper flue ways.
7.3.2

Cleaning the combustion chamber

20
C003444-A
NXR4i
The operations described below shall only be performed
with the boiler and power supply off.
- Carefully sweep the flue ways with the brush supplied for that
purpose.
- Brush the baffle plates.
- If possible, use a vacuum cleaner.
- Replace the baffle plates.
- Close the doors.
- Unscrew the 4 closing nuts and open the furnace door.
- Brush out the inside of the furnace.
- Use a vacuum cleaner to remove any soot which has accumulated
in the combustion chamber.
- Close the door and replace the front panel.
09/06/2011 - 300025088-001-B