| 摘要 |
The invention relates to a regulating arrangement for low-temperature heating boilers, in which the boiler temperature slides depending upon the heat requirement according to two parallel heating curves, one of which stipulates a lower boiler temperature, at which the burner switches on in each case and the minimum value of which, which lies below the smoke gas dewpoint, is adjustable, while the other stipulates an upper boiler temperature, at which the burner switches off in each case, the switching difference being modifiable in the lower range of the heating curves. In this case, a minimum value of the upper boiler temperature can be adjusted independently of the minimum value of the lower boiler temperature in such a manner that the switching difference, when the boiler temperature sinks below the smoke gas dewpoint, increases steadily to the maximum difference of the two minimum values. As a result, the occurrence of smoke gas condensate which attacks the boiler is reliably prevented even in the lower part-load range, without large setpoint deviations of the boiler temperature arising.
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