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Inspection and maintenance
NOTICE
Material damage due to chemicals
Using chemicals during the cleaning of the heat exchanger assembly and
associated parts or carrying out maintenance can damage the sealing
components. This can cause exhaust gas to escape during operation.
▶ Do not use chemicals to flush the heat exchanger assembly and
associated gas carrying components.
It is recommended to use the cleaning tool accessory, comprising of
brush and lifting tool to assist in cleaning the heat exchanger assembly.
Part number part number 7 733 600 091.
Refer to figure 73.
▶ Disconnect the electrical connection [3] from the fan.
▶ Remove the gas hose [2] from the venturi nozzle.
▶ Remove the screw [1] on the mixing device.
▶ Remove the fan with mixing device [4].
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4
3
Fig. 73 Removing the fan with mixing unit
Refer to figure 74.
▶ Pull off cables from the electrode set [2].
▶ Pull off cable [1].
▶ Remove M8 nut [3].
▶ Remove the burner cover [4].
On re-assembly, to ensure a full gas tight seal, tighten the M8 nut down
firmly, without over tightening.
62
Fig. 74 Remove the burner cover
Refer to figure 75.
▶ Remove the non-return valve (bearing plate)[1].
– Check for damage/cracks or deformation and for contamination,
replace if required.
– Ensure non-return valve moves freely.
Fig. 75 Non-return valve (bearing plate) in the mixing unit
Refer to figure 76.
▶ Remove the gasket.
▶ Remove electrode set [2].
2
– Check for damage or deformation, replace if required.
– Check electrodes for contamination, clean or replace, if required.
▶ Remove the burner [3].
Fig. 76 Removing the burner
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4
3
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3
Greenstar 2000 – 6 721 820 552 (2021/02)
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0010036059-001
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2
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