Buderus GB142 Series Technical Service Bulletin page 2

Bulletin Number: TBG-35 | GB142 Heat Exchanger Replacement

Disconnect the hot surface ignitor and ionization electrode
plugs.

Loosen the fastening screws [Fig.7, pos. 1 ].

Pull the ground cable from the hot surface ignitor [Fig.7,
pos.2].

Dismantle the mounting plate [Fig.7, pos.3].
1 1
2 2

Remove both the hot surface ignitor and the ionization
electrode from heat exchanger [Fig.8].

Open latches [Fig.9, pos. 1 ] on the condensate collector.
1 1

Remove the condensate collector.
2 of 3
Data subject to change without notice | BTC 435002107 A | 05.2012
Figure 7
3 3
1 1
4 4
Figure 8
Figure 9
1 1

Dismantle the tension spring [Fig. 1 0, pos. 1 ] between the
supply pipe and the heat exchanger.

Fully loosen nut [Fig. 1 0, pos.2]. Remove both the nut and the
clip that was revealed beneath it from the old heat exchanger
and reinstall them on to the replacement heat exchanger in
the same location.
1 1

Loosen with one turn the nut [Fig. 1 1, pos. 1 ] between the
supply

Pull the supply pipe [Fig. 1 1, pos.2] out of the heat exchanger.
2 2
1 1

Pull the combustion air supply and flue gas exhaust
connections on top of the appliance upwards to remove
them.

Loosen all fastening screws of the flue gas adapter.

Remove the flue gas adapter [Fig. 1 2, pos. 1 ] from the top of
the appliance.
Technical service bulletin
Figure 10
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Figure 11
Figure 12
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