| 摘要 |
Fuel-heated heat source with two heat exchangers which are arranged in a housing, in each case heatable by a burner and have a control fitting in the fuel path, an ignition device and a monitoring device. According to the invention, it is proposed that a reversing valve device (24) is provided in the fuel path (20) downstream of the fitting (21), for in each case operating one of the two burners (30, 31). <IMAGE>
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