Checking The Ionization Electrode; Replace If Necessary - Buderus Logamax plus GB142-24 Servicing Instructions

8.1.17 Checking the ionization electrode; replace if
necessary
 Switch off the power supply of the heating system on the circuit
breaker.
 Set the main switch on the BC10 to "0" (Off).
 Remove the casing.
 Disconnect the plug and socket connection of the cable.
 Set the volt-ohm-multimeter to "Resistance testing".
 Test the earth connection circuit of the ionization electrode (see
fig. 27). The height of the resistance value must be infinite.
 Loosen the fastening screws (see fig. 29, pos. 1).
 Remove the earth cable (see fig. 29, pos. 2).
 Remove the mounting plate (see fig. 29, pos. 3).
 Dismantle the ionization electrode (see fig. 29, pos. 4).
 Set the volt-ohm-multimeter to "Resistance measurement".
 Test the resistance of the ionization electrode (see fig. 30).
The resistance must be 0
 Check the ionization electrode for contamination, wear or
damage (see fig. 31).
 Replace the ionization electrode if required.
 Install a new ionization electrode with a new gasket and secure
the mounting plate with the fastening screws.
 Fit the earth cable (see fig. 29, pos. 2).
 Restore the plug and socket connection.
 Fit the casing.
 Switch on the power supply of the heating system on the circuit
breaker.
 Set the main switch on the BC10 to "1" (On).
Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
Ω
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fig. 29 Replacing the ionization electrode
fig. 30 Testing the resistance of the ionization electrode
fig. 31 Checking the ionization electrode
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