【Weekly Topic】【HVAC Version 20160801】
Thread Content
Participation reward: 2 Wealth. Reward for correct answer: 9 wealth. True or False. Fire and smoke exhaust valves remain open under normal conditions, stay open at 70°C, and close at 280°C. ( ) [Production and Management Division] Seeking moderators and technical discussants to join us. [Task-based reward: 3000 wealth points] Original post: Organizing the content of dashboard posts. [Task-based reward: 5000 wealth points] Original post: Organizing and summarizing the content of control panel posts
Error. 【The 70℃ fire damper is used in ventilation ducts; when a fire breaks out in a room and smoke spreads into the ventilation ducts, the damper closes to prevent smoke and embers from spreading to other smoke-free areas.】 A 280-degree fire damper is used for normal ventilation; during a fire, it is installed on pipes through which smoke needs to be exhausted. Therefore, it must not be closed at 70°C, as that is when smoke extraction is still necessary. Once the temperature reaches 280°C, it indicates that a fire has broken out in the pipe, and there is no longer any need for smoke extraction, so the damper must be closed. 】
The fire and smoke exhaust valve remains open under normal conditions, stays open at 70°C, and closes at 280°C. ( √ )