Weak current College】 【Central air conditioning system common breakdown and solution.

<br> <br> 1, machine dew point temperature is normal or low, indoor temperature slow causes and solutions <br> ① air is less than the design value, ACH, check fan model meets the design requirements, impeller steering is correct, .the belt is relaxation, turn up the air supply valve to eliminate inadequate air volume. <br> ② with secondary air system, the second to the excessive amount of wind, tuning, reducing secondary air flow. <br> ③ air conditioning room, .air distribution, regulation, in order to give the room a uniform air distribution. <br> <br> 2, system design air volume flow rate is greater than the actual causes and solutions <br> ① system design of the actual resistance is less .than, the amount of wind resistance and increase the fan, conditions can change the fan speed. <br> ② the design-time selection of fan capacity on the high side, down wind, reduce air flow control valve <br> <br> .3, the Commission is less than the measured air flow design air causes and solutions <br> ① the actual system of design resistance, resistance is greater than the fan reduce, conditions permitting, improved duct components, reducing system resistance. <br> ② .System congestion, check clearing system possible obstructions. <br> ③ air leakage, the system should be blocking. <br> ④ fan can not reach the design capabilities or impeller rotation direction is wrong, check the belt skidding, etc., excluding impact .of fan output. <br> <br> 4, indoor noise causes greater than design requirements and solutions <br> ① fan noise is higher than the rated value, determination of fan noise, check whether touch shell fan impeller, bearing damage, damping .is good, symptomatic treatment. <br> ② the wind pipe and valve, air velocity, generate aerodynamic noise, please adjust various valve, reducing Tuyere, excessive speed. <br> ③ duct system noise control equipment is not perfect, increase the muffler .elbow equipment. <br> <br> 5, total system air supply and air total into, and the difference between the larger causes and solutions <br> ① air volume measurement and the calculation is incorrect, please review the measurement and calculation data. .<br> ② system leakage or air leakage circuit, check, elimination of short circuit. <br> <br> 6. indoor air flow velocity distribution does not have the dead angle causes and solutions <br> ① airflow design considerations, should be .based on measured air flow distribution map, adjust the supply outlet location or increase the quantity of air. <br> ② air flow is not uniform, not consistent with the adjustment of design values, you should adjust the air flow and design requirements. < .br>.