| After the unit has been switched off manually (for example, by pressing the instant heat button -E537-), after a maximum operating time of 60 minutes or after the coolant reaches a temperature of 84° C, combustion is ended and the run-on mode begins. The circulation pump -V55- and the combustion air blower -V6-, however, continue to run to cool down the auxiliary heater (run-on mode) and are switched off automatically. |
Note | The run-on period of the circulation pump -V55- and the combustion air blower -V6- depend on the operating mode in which the auxiliary heater was switched off. |
| The run-on period is 175 seconds when heater is switched off during full-load operation and about 110 seconds for part-load operation. |
| Depending on the control unit software version, slight deviations in the specified post-operation values are possible. |
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