Buderus GB402-320-5, Инструкции по установке и обслуживанию для подрядчиков

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10 Inspection and servicing
Logano plus GB402 – 6 720 820 700 (2018/01) 39
10.7 Inspecting the burner electrodes
Checking the electrode position
▶ Move the burner into its service position
(

Chapter 10.6, page 35).
▶ Check the gaps between the electrodes and compare them with
those shown in Fig. 55.
Fig. 55 Setting the electrode position
[1] Gasket (O-ring), mixture manifold
[2] Fixing screws, burner rod
[3] Ignition electrode
[4] Burner rod
[5] Ionization Electrode
▶ Replace the electrode block together with a new gasket if actual
values deviate from the specified parameters.
▶ If deposits are found on the electrodes, replace the electrode block
together with a new gasket or sand down the electrodes.
▶ For completing maintenance see

Chapter 10.9, page 41.
If spare parts replacement is necessary, see from Chapter 10.8.
10.8 Replacing components
10.8.1 Removing the gas valve
▶ Shut down the heating system (

Chapter 8.1, page 32)
▶ Close the main gas shut-off valve or gas isolator and secure against
unintentional re-opening.
▶ Remove the front panel (

Chapter 10.1, page 32).
▶ Pull compensation hose [1] from the ventilation air collector. In the
course of this work, push locking device of the plug-in connector
against pull direction.
▶ Undo the ventilation air hose between the ventilation air collector
and adaptor at the hose clip (

Fig. 44, page 36).
▶ Pull off ventilation air hose together with the connector from
ventilation air collector (

Fig. 44, page 36).
▶ Undo cables [3] from the gas valve.
▶ Undo 4 screws [2] from the gas valve flange.
Fig. 56 Undoing the gas valve connections
[1] Compensation hose
[2] Screws
[3] Cables
▶ Remove 3 nuts [2] from the nozzle plate and remove gas valve [1].
Fig. 57 Undoing the gas valve
[1] Gas valve
[2] Nut
▶ For completing maintenance see

Chapter 10.9, page 41.
We recommend the replacement of the electrode block
as part of the annual service.