By deenergizing of coil, the control air actuates the3 - way valve pos. no. 29 through the pipe named "SUPPLY" and the3 - way magnet valve pos. no. 73, right frame.
由线圈的断电，控制空气促动三通阀29通过supply管路和三通电磁阀73右位。
2
The exhaust pipe influences airsupply and smoke exhaust, that can induce incomplete combustion and efficiency decline.
排烟管的设计安装不当将影响空气的供给，从而引起燃烧不完全和火焰拉长现象，导致热效率下降。
3
About the supply voltage, frequency, capacity factor of the fan and motor, specification of coil pipe, kinds of humidifier, form and efficiency of air filter, caliber and direction of pipe and etc.