Installation instructions for explosion-proof air conditioners

Installation instructions for explosion-proof air conditioners 1. The power supply of the explosion-proof air conditioner shall have a dedicated line, and a circuit breaker or air switch shall be provided in the dedicated line. The power supply wires and fuses should comply with the relevant regulations and cannot be changed at will. 2. In order to prevent the risk of leakage due to insulation damage, a leakage protector can be installed if possible, its operating current is 15-30 mA, and the cut-off time should not exceed 0.1 second. 3.The switch must be used for starting and stopping the explosion-proof air conditioner. Do not use the plug directly to open or stop the air conditioner. In this way, the air-conditioning control system will be damaged, and secondly, an arc will be drawn between the plug and the socket when plugging and unplugging, resulting in personal safety accidents. And in the long-term standby, not only consumes a certain amount of electricity, but also easy to be struck by thunderstorms. 4. All explosion-proof electrical plugs must be plugged in tightly, not loose. Otherwise it will cause poor contact and damage the air conditioner. Fifth, the capacity of the residential electricity meter is not enough, we must first increase the capacity, do not take the luck, so as not to cause a fire due to the overload of the line. 6. You should read the instruction manual carefully, operate according to the regulations, and do not press the remote control indiscriminately. 7. Old-fashioned explosion-proof air conditioners cannot be restarted within 3 minutes after shutdown, otherwise the compressor may be easily burned out. The new type air conditioner has a circuit to prevent restarting within 3 minutes. Even if it is restarted within 3 minutes, the compressor will not work. 8. In case of abnormal sound, immediately shut down and cut off the power, and ask the manufacturer's special maintenance point or office technician to come to the site for inspection. 9. When the explosion-proof air conditioner is in operation, do not spray insecticides or volatile liquids on it to avoid fire caused by electric leakage. 10. When the power supply voltage exceeds the working rated voltage of 240V or more, stop the air conditioner to ensure safety. When using the air conditioner, if you find that the power supply voltage is too low, you should immediately power off and stop using. Otherwise it is easy to damage the compressor. Seven. The connecting pipe should not be long: the outdoor unit of the explosion-proof air conditioner is placed in a place where heat is easily dissipated. The connecting pipe of the indoor and outdoor units should not exceed the recommended length as much as possible, which can enhance the cooling/heating effect. Eight. Effective use of the timing function of explosion-proof air conditioners: Please use a timer to run it only during the necessary time to save electricity.

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What are the causes of air conditioning trip

06/20/2020

What are the causes of air conditioning trip

What are the causes of air conditioning trip 1. The contradiction between the rated current of the air conditioner and the current carrying capacity of the wire.   Here are two formulas involved:   ①The rated current of air conditioner I=P÷U ÷power factor, the power remains unchanged, the smaller the voltage, the greater the current required.   ② The current carrying capacity of the wire I=U÷R, the voltage is proportional to the current.    So when the power supply voltage is normal, we must consider the line voltage drop. The longer the line, the greater the resistance, the greater the voltage drop, and the smaller the output current at the end. However, because the power of the load remains unchanged, the voltage becomes smaller, and the current that needs to be output will be larger. At this time, the wire is forced to overload, and the time will cause heating, and eventually cause the tripping of the open circuit.    Some friends said that the heat of the wire will not cause the tripping of the circuit breaker. In fact, the manufacturer of the air switch has made it clear in the relevant manuals that the heat of the wire will cause the air switch to trip. Because the wire heats up, the crimp terminal will also heat up, and the resistance will become larger and larger. The larger the resistance, the greater the current consumption, and the hotter it will be, a vicious cycle.    2. Leakage   During the daily maintenance work, we will encounter the situation that the air circuit trips due to the leakage of electricity. At least I have not experienced it once or twice. Regardless of the leakage of the neutral line or the leakage of the live line, a long time will cause the circuit breaker to trip.   Why does the electric leakage cause the MCB to trip? There are two situations.    ① Good grounding. At the beginning, the leakage current was not large, and as time went by, the leakage current became larger and larger, and eventually evolved into a short circuit to ground, unable to close.   ②There is no ground wire. If the equipment is not connected to the protective ground, when the wire leaks to the equipment, it is equivalent to adding a large shunt resistance. Like this problem, if the air conditioner does not have a ground wire, when the wire leaks to the air conditioner, the air conditioner is a very large shunt resistor and will consume a lot of current. Eventually, the wire will heat up or trip open.   How to determine whether the trip caused by the above two aspects can be done with a clamp ammeter.    ① Measure the voltage at the input and output to see if there is a significant change in voltage drop.   ②Measure whether the output current exceeds the standard.    So my suggestion is: first measure the supply voltage to see if it is within the allowable fluctuation range. Then measure the current to see if it exceeds the rated ampacity of the wire. Finally, check the data one by one according to the measured data to find out the reason.

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