| 摘要 |
<p>The temperature of fluid supplied to a circulating fluid heating system by a fuel burning heating appliance is monitored, and the rate of change of the monitored temperature is measured. The rate of fuel supply is adjusted in dependence upon a comparison of the measured rate of change with a predetermined rate of change such that the rate of fuel supply decreases with increasing measured rates of change thus reducing cycling. The rate of change may be calculated over different sampling periods. The predetermined rate of change may be a function of the measured temperature, and perhaps of the outside temperature. The rate of fuel supply may also be reduced progressively in stages as the temperature of the fluid supplied to the system or the temperature of a room heated by the system passes preset thresholds. <IMAGE></p> |
