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MAINTENANCE GUIDE
3.17 Main heat exchanger
Tools
TIME
20 min
Drain boiler (see 3.3)
Remove the silencer
1
Remove the two clips and disconnect the pipes.
Isolate the gas supply and disconnect the gas pipe.
Remove the four screws.
2
Remove the burner unit
3
Remove the four screws to free the heat exchanger
4
Unscrew and lift the manual air vent from the exchanger
5