How To Recharge an AC System? You must have heard about recharging an AC unit in a car and a layman who never have done before, may think its just putting on the refrigerant into the AC system that is all.
But No! This involves an array of careful steps that needs to be handled very carefully under the supervision of an expert and with quite a comprehensive set of information that will help you follow the basic instructions.
You must know the basics, the cautions and the required equipment to help you get through the whole process.
- Manifold gauge set
- Vacuum pump
- Protective glasses
At first you will need to clear out the AC system using the vacuum vary carefully so that the remaining refrigerant may not disperse in the surroundings. You can do that using a vacuum pump.
After removing it you need to be sure that there is no moisture inside and the system is very of any leftovers in it. For this you can pass the system through the evacuation process using the vacuum pump so that nothing or no moisture is left in the system.
Before you go this step, you will have to set up the Manifold gauge valve to the system so that you can check if there is any leakage or not.
You will need to figure out the low pressure knob marked with an “L” to make sure you join the low pressure valve hose with it and also find the high pressure knob to get attached to the high pressure valve through the respective hose. The low pressure knob will be the one through which we’ll be inserting the refrigerant.
In the Manifold gauge, the two gauges will show the pressure set up inside and the presence of the refrigerant when it will enter and we can see through the middle, see through glass.
The middle hose will be attached to the vacuum.
Firstly, turn the vacuum on and see if the gauges show no pressure and remains at the zero position. After that, leave the set up for about 15 to 30 minutes to see if there is anything unusual shown in the gauges, this will show that the inner system is set to go for a recharge.
Now you should be adding some oil into the system and you can do it through the middle hose, also you can add some AC dye to penetrate into the system so that it can show you minor leakages in the future if there are any.
After that you will have to attach the center hose to the refrigerant bottle that you want to put into the system.
Remember seeing the label on your car AC about how much refrigerant is required to fully recharge the system and select the one that matches the capacity.
Now start adding the refrigerant by attaching the center hose to the bottle and make sure you attach it carefully because you will need to keep the cap in a way that will not let the refrigerant dispersed in the air and only flows through the hose. So, keep the piercing needle cap intact to avoid any such issues.
Open the low pressure valve and let the refrigerant go into the system.
At the same time you may set your car fan on the low position and turn it on, also, set on the AC in the fresh air in position and not on the recycle position so that you can check the temperature. Also put the AC thermometer into the outlet point to see the temperature changes. Keep the AC on and verify the whole process.
You’ll see the refrigerant goes in and it shows in the see through mirror right in the middle of Manifold gauge. Keep looking until its totally filled in and you can feel the chilled air in the car, the compressor of the car will turn on and keeping turning of an on, all these signs show that the recharge has been done correctly. In the end, take out the hoses out and replace with the caps on the knobs.
In this whole process, you should be sure you keep all things in place correctly, put on the safety glasses and try not to disperse your refrigerant into the air to keep everything safe.