Why must vacuum in the process of installing air conditioners?
Vacuum is a process to remove all impurities and air inside the refrigerant gas discharge pipe so that the machine works at its best, without cable blockage or precipitation during use.
When installing air conditioners, vacuuming is for both Non-Inventer and Inventer air conditioners.
In particular, for inverter air conditioners using R32 and R420a gas lines are two high-pressure gas lines with high pressure and are not resistant to air impurities, so if you want to ensure the machine has a deeper, stable cold , is not congested, this procedure should not be skipped.
If the installation is not vacuumed, the following phenomena may occur:
The air conditioner during use will be mixed with air impurities in the circulation system, reducing the coldness of the machine, consuming power, leading to a situation that is both not cool and consumes more electricity.
The machine running for a long time may clog the cable or precipitate, easily damaged, affecting the operation and life of the machine.
Compressor works shake or broken, reducing service life.
Some brands will refuse to provide the warranty if the vacuum is not used.
Step 1: You lock the suction line, the ejection line of the air conditioner.
Step 2: Next, you take the pressure gauge, lock the 2 valve arms closed.
Step 3: You use the blue gas wire to catch the air conditioner’s suction line valve (located on the outdoor unit), and the yellow wire to catch the air intake, the red wire to catch the air conditioner’s push line.
Step 4: Run the vacuum machine: You need to observe the pressure gauge, when the red meter returns to zero, the green meter returns to – 760mmhg to be able to run the machine. Then continue for another 15 minutes.
Step 5: After the vacuum is finished, close the meter valve and turn off the vacuum cleaner. Finally remove the watch band, then continue the air conditioning installation procedures.
You must use the pump to suck, at least 10 minutes (for air conditioners using gas R22). After the suction is finished, wait 15 minutes to check the absolute tightness.
During the vacuum process, you need to regularly check the lubricating oil of the vacuum pump, supplement when lacking, dirty oil needs to be replaced.
If the pump stops the suction pump, the blue valve of the meter must be closed to prevent the compressor lubricating oil from returning to the refrigerating system due to the pressure difference.
This job requires highly skilled workers, when it is done for the first time, there should be a helper to guide the installation of the air conditioner. You should not arbitrarily do it, it is very easy to have problems.
Hopefully, the above useful information will help you easily vacuum during the installation of air conditioners. Please refer!