Fig. 22. Cleaning the Combustion Chamber
I-62
F-084392_EN • B
M
aintenance
Checking the Flue Pressure Switch oper-
ation
Conditions:
Tools and material:
î
Manometer (measuring range up to min 500 Pa)
Check Procedure:
This procedure needs to be per-
formed with boiler (and controller)
running, and the front panel open.
When performing the following
procedure, do not touch the high
voltage connections and do no
touch any inner component of the
boiler with any wet body part.
1.
At the adapter (
2
), disconnect the hose (
1
)
running from the condens dish to the flue
pressure switch.
2.
Connect a T-piece to the hose.
3.
Connect pressure meter to one of the T-piece
connections.
4.
Blow air in the hose while it is connected to
the flue pressure switch and to the measur-
ing device
5.
Verify that the pressure switch switches at
the set pressure (500 Pa) and that the con-
troller displays error 193.
6.
In case of malfunction, replace the flue pres-
sure switch.
Follow-on tasks:
1.
Reconnect the hose (
1
) to the adapter (
2
).
2.
Check that the connection is not leaking.
ON
Checking and Cleaning the Combustion
Chamber
Conditions:
î
Burner removed, see
“Removing and Install
-
ing the Burner” on page
I-60.
Tools and material:
î
Industrial vacuum cleaner
î
Nylon bristle brush
î
Torch
Check Procedure:
1.
Using a torch, visually check the condition of
the combustion chamber. If it is dirty, clean it.
Cleaning Procedure:
1.
Using a nylon bristle brush, sweep the walls
of the combustion chamber.
2.
Using an industrial vacuum cleaner, remove
all deposits from the combustion chamber
heating surfaces.
3.
Pour some clean water to remove any residues.
Follow-on tasks:
1.
Remove and clean condensate trap, refer to
“Installing and Removing the Condensate
Trap” on page I-27
2.
Install the burner, see
“Removing and In
-
stalling the Burner” on page
I-60.
OFF
1
2
Fig. 23. Testing the Flue Pressure Switch
