| 摘要 |
The boiler purge control sequence includes the steps of first moving a draft damper (16) to a predetermined position which is a substantial percentage (preferably 100%) of its high fire position, then starting a fan (22, 24) after the damper reaches the predetermined position to create a draft in the boiler, maintaining the damper in the predetermined position for a preset purge period, moving the damper toward its low fire position after the end of the purge period, and finally lighting the boiler. |
