Wolf FGB-28 - Determining the Soiling Level on the Heating Water Heat Exchanger (Flue Gas Side)

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28.4. Determining the soiling level on
the heating water heat exchanger
(uegasside)
Fitting the pressure test
connector
- Undo the M4 Allen screws on the ignition IO electrode
- Fit the adapter plate with pressure test connector
- The
Ignition IO electrode must be retted after maintenance
- Connect the differential pressure tester between the adapter plate "+" and
the ue gas test port "-" on the device connection ange
- The appliance starts with the venting program
(AP function) for 30 sec. (see chapter 15 – Control unit)
and the fan runs at constant speed for 30 sec.
28 kW 35 kW
Reading What to do Reading What to do
> 3 mbar
1)
Cleaning > 3 mbar
1)
Cleaning
Table: Limits for heat exchanger cleaning
1)
Up to software version 1.10, limit at 7 mbar
- Compare the reading with the table and take the required measures
- Clean the heat exchanger as described in 28.8.
Switching on the appliance
(rack in again)
Determining combustion
chamber / heat exchanger
pressure differential
+
-