開(kai)(kai)啟動(dong)(dong)(dong)作(zuo)(zuo)(zuo)可(ke)手動(dong)(dong)(dong)或(huo)自動(dong)(dong)(dong)，手動(dong)(dong)(dong)又(you)分為(wei)就(jiu)地操作(zuo)(zuo)(zuo)和遠程操作(zuo)(zuo)(zuo)兩種。自動(dong)(dong)(dong)也可(ke)分有(you)煙(yan)（溫）感電信號聯(lian)動(dong)(dong)(dong)（煙(yan)感器作(zuo)(zuo)(zuo)用(yong)(yong)半(ban)徑不大于(yu)10m）和溫度熔斷器動(dong)(dong)(dong)作(zuo)(zuo)(zuo)兩種。溫度熔斷器動(dong)(dong)(dong)作(zuo)(zuo)(zuo)溫度通常用(yong)(yong)280℃。排煙(yan)口動(dong)(dong)(dong)作(zuo)(zuo)(zuo)后，可(ke)通過手動(dong)(dong)(dong)復(fu)(fu)(fu)位裝置或(huo)更換溫度熔斷器予以復(fu)(fu)(fu)位，以便重復(fu)(fu)(fu)使用(yong)(yong)。裝于(yu)空調(diao)排風系統(tong)煙(yan)氣入(ru)口處，平時處于(yu)關閉狀(zhuang)態，只有(you)在發生火(huo)(huo)災(zai)時才根據火(huo)(huo)災(zai)煙(yan)氣擴(kuo)散蔓延情況(kuang)予以開(kai)(kai)啟。

排煙風(feng)口，裝(zhuang)于空(kong)調排風(feng)系統煙氣入口處(chu)，平(ping)時處(chu)于關閉狀態，只有在發生火災時才根據火災煙氣擴散蔓(man)延情(qing)況予(yu)以開啟。