There is no detailed category of precision air conditioning units, can only provide an estimate of the reference answer, 600 ~ 750kg net weight, the operating weight is larger. The chilled water type is lightweight, and the direct evaporation dual cooling source type indoor unit has a compressor, which should be heavier.
Precision air conditioning and ordinary civil air conditioning performance parameters
Precision air conditioning is designed for the precise temperature control required by electronic equipment, civil air conditioning is designed for the comfort of indoor personnel. Precision air conditioning is a specialized air conditioner designed for modern electronic equipment rooms. Its work precision and reliability is much higher than ordinary air conditioning. Computer equipment and program-controlled switch products are placed in the machine room, consisting of a large number of dense electronic components. In order to improve the stability and reliability of the equipment, it is necessary to strictly control the temperature and humidity of the environment. Precision air conditioning can control the temperature and relative humidity of the machine room at ±1℃, greatly improving the service life and reliability of the equipment. Scope of application:Precision air conditioning is widely used in computer rooms, program-controlled switch rooms, satellite mobile communication stations, large medical equipment rooms, laboratories, laboratories, precision electronic instruments production workshop and other high-precision environment, such an environment for the temperature of the air, humidity, cleanliness, airflow distribution and other indicators have high requirements. Specialized machine room precision air conditioning equipment must ensure that 24 hours a day, 365 days a year safe and reliable operation.
What are the common failures of computer room air conditioning (precision air conditioning) when it is first turned on? What is the solution?
Precision air conditioning is the most common problem is the temperature alarm, the air temperature is too high, the cooling system is not good. The main reasons are summarized as follows:1. Precision air conditioning outdoor radiator accumulates too much ash and is not cleaned in time. The working principle of the outdoor unit condenser is to discard the heat absorbed by the indoor unit during outdoor cooling. Because the outdoor unit accumulates a large amount of dirt during operation, the heat exchange efficiency of the heat exchanger becomes lower and lower, leading to a gradual increase in the condensing pressure of the air conditioner unit, resulting in a deterioration of the cooling effect. The air filter in the return air outlet at the top of the machine collects too much dust. Precision air conditioners have filters installed indoors to filter dust from the air. If the filter collects too much dust, it will increase the indoor air resistance, thus affecting the intake air volume and indoor circulating air volume. Especially when the filter is clogged with too much dust, the circulating air volume will be greatly reduced, preventing normal heat exchange and leading to a significant reduction in cooling capacity. Precision air conditioners may have R22 (commonly known as snow seed) leakage during daily operation, resulting in a partial shortage of R22. The cooling of the air conditioning compressor is realized by snow. If the amount of snow is insufficient, the cooling effect of the compressor is correspondingly poor. Outdoor filter is dirty and clogged. Fault description:The temperature difference between the front and rear welding of the outdoor filter is obvious, the outdoor unit starts frequently, the indoor compressor low pressure alarm, the compressor stops running, the refrigeration system fails, and the cooling can not be normal. Indoor fan belt aging. Fan belt aging slack phenomenon after a long time running
Please teach the precision air conditioning on the value of what it means?
Here is the Emerson LiebertPEX room air conditioner panel "UNIT1":current unit number, "unit start":current system status "RET21℃RET55% ": set temperature and humidity values (i.e., set temperature 21 ℃, relative humidity 55%) "ACT22 ℃ 52%": the current temperature and humidity values (i.e., the current temperature of 22 ℃, relative humidity 52%), the following eight state icons from top to bottom, from left to right that is, line [1], left: supply percentage ( Output), Right:Hot water heating percentage (Output) (line 2) as follows:Left:Natural cooling (Output percentage), Right:Dehumidification (Output percentage) line 4 Left:Maintenance items (number to be maintained/all numbers), Right:Humidification (Output percentage)