For more information, see
Checking/setting the combustion, page 50
10.2.8 Check the air supply hose
1. Disconnect the hose on the air box side by loosening the bayonet
fitting.
2. Check the hose for damage and pollution.
3. Remove the pollution from the hose with a cloth or soft brush.
4. Replace the hose if it is faulty and/or leaking.
10.2.9 Checking the dirt trap
Important
With room-sealed operation, disconnect the air supply pipe
above the boiler to access the dirt trap.
In room ventilated operation with an air supply filter, remove the
filter to access the dirt trap.
1. Check the dirt trap on the air supply side for soiling.
2. First remove coarse soiling and clean the trap with a vacuum cleaner
or a cloth.
10.2.10 Checking the air box
1. Check the air box for soiling.
2. Clean the dirty air box using a vacuum cleaner. Do this from the
connection opening for the air supply hose.
Important
If the air box is dirty, the following components must also be
dismantled and blown clean:
Non-return valve
Venturi
Fan
Fig.66
Air supply hose
AD-0000535-01
1
2
3
Fig.67
Dirt trap
AD-0000533-01
1
2
Fig.68
Air box
AD-0000536-01
1
2
10 Maintenance
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