| 摘要 |
<p>An interrupt (10) for a burner control circuit includes a pair of switches (32, 34) controlled by a relay coil (30). The normally closed relay switch (32) opens to the break the electrical connection to the power supply and the normally open relay switch (34) provides power to a timing element (24). The timing element (24) counts down from a predetermined time to allow sludge in an oil holding tank to resettle after an oil delivery and provides a fail-safe feature to insure that the burner control circuit is not inadvertently interrupted.</p> |
