Potterton EC three 125 Installation, Operation And Maintenance Manual page 132

Maintenance
Fig. 34: Remove burner
Eurocondense three Eurocondense three
125 - 170 215 - 300 E
7. Remove nuts and washers and pull out the entire burner (5) with burner seal
(6) forwards
Installing burner
The installation of the burner is done in the opposite sequence
Note: Use new seals when installing the burner.
132 Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13