The fire damper auto control circuit of the air-conditioner

Published:2011/7/7 1:10:00 Author:Borg | Keyword: fire damper, control circuit, the air-conditioner | From:SeekIC

In the project that there is the requirement of ventilation and air-conditioning, there must be the fire damper in the air supply and return tube. When there's a fire, the temperature of air supply or return is rising up (about 70oC), which fuses the fuse strip of the fire damper, the damper is closed and makes the micro switch take action, so the fire alarm is ringing, the wind motor stops, see as the figure. This system has 4 fire dampers. When SA is in 90o (left 45o is pump running, right 45o is the motor running, 0 is shutting down), just press the key of starting ST.



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