HTF price 2014HTF exhaust fan exhaust fan Heng Hing air conditioning

Using a noise meter blade is lower than the existing fire fans 8-10dB low (A) power 6%. Fans main air duct medium temperature of 280 degrees and 30 minutes of continuous running series fire temperature exhaust machine 1. Uses and characteristics: 2. Uses 3. temperature exhaust machine, both for the variety of building fire smoke, but also for building , civil air defense projects, underground railways, mines and other smoke and exhaust tunnel. 2 Features: series of fire temperature exhaust fan with high efficiency, smooth operation. Low noise, high temperature, reasonable structure, and ventilation fans occupy less space two-thirds. Lighter than half. Ensure power, easy to install, can be vertical, horizontal and hanging installation. Fan design with special motor cooling system, built-in air-cooled motor type: Fan building construction according to the requirements of the use of vertical and horizontal ceiling installation. Power three-phase 380V, 50Hz fans using advanced aerodynamic set the clock above 150 degrees can be long-term continuous operation. Fans allow full pressure start or step-down start, but it should be noted that the current full voltage starting approximately 5-7 times the rated current, voltage starting torque is proportional to the square of the voltage, when there is insufficient grid capacity, should drop pressure start. (When the power is greater than 11KW, should adopt the step-down start). 2, fans at the test, you should carefully read the product manual, check the wiring method is consistent with the wiring diagram; should carefully check the operating voltage of the power supply fan is not met, the power is the same phase or phase, with the capacity of the electrical components meet the requirements. 3, the test less than two people, one to control power, one observes fan operation, abnormal phenomenon immediately stop inspection; First check the direction of rotation is correct; after the fan begins to run immediately running current is balanced, if the current exceeds rated current; if not normal, should be down to check. After running for five minutes, the fan down to check whether there is abnormal phenomenon, confirmed that no anomalies start running again. 4, two-speed fan test, it should start low, and check the direction of rotation is correct; it must be at the start and then start the high-speed fan still prevent reverse rotation speed, causing the switch trips and motor damage. 5, the fan up to speed, the fan should be measured running current is normal, the fan operating current can not exceed the rated current. If the operating current exceeds the rated current, the fan should check the supply voltage is normal. 6, the fan motor power is required to refer certain conditions, for centrifugal fan and wind chassis, the required high power inlet fully open. If the inlet operated fully open, the motor may be damaged. When the test is best to fan the fan inlet or outlet piping of the valve is closed, the operation will gradually open the valve, until the desired working conditions, and pay attention to the fan operating current exceeds the rated current.