How to Charge Refrigerant (Gas) in an AC unit?

Charging refrigerant in an AC unit involves adding the right amount of refrigerant gas to ensure the system operates effectively. Here's a simple explanation of the process:

Safety First: Make sure the AC unit is turned off and unplugged. Safety goggles and gloves are recommended.

Locate Service Valves: Find the service valves on the AC unit. There are typically two valves – a larger one called the low-pressure or suction valve and a smaller one called the high-pressure or discharge valve.

Attach Gauges: Connect refrigerant gauges to the service valves. The blue gauge connects to the low-pressure valve, and the red gauge connects to the high-pressure valve.

Connect Refrigerant Cylinder: Attach a refrigerant cylinder to the yellow hose on the gauges. Make sure the cylinder is in an upright position.

Start the AC: Turn on the AC unit and set it to its maximum cooling mode. The compressor should start running.

Add Refrigerant: Slowly open the valve on the refrigerant canister. This allows refrigerant to flow into the AC system. Watch the pressure gauges as you do this. The pressure readings should rise as the refrigerant enters the system.

Monitor and Adjust: Continuously monitor the pressure readings on the gauges as you add refrigerant. Stop adding refrigerant when the pressures approach the recommended levels for your AC unit.

Close Cylinder Valve: Close the valve on the refrigerant cylinder once the desired pressures are reached.

Disconnect Gauges: Safely disconnect the gauges from the service valves. Be careful as there might be a small release of refrigerant when disconnecting.

Test AC: Let the AC run for a while to ensure that it's cooling effectively. Check the temperature of the air coming out of the vents.

Check for Leaks: If you needed to add a significant amount of refrigerant, it's a good idea to check for any leaks in the system. Leaks should be repaired before adding more refrigerant.

Remember, handling refrigerant requires proper training and knowledge to ensure safety and proper functioning of the AC unit. If you're not comfortable with these steps, it's best to consult a professional HVAC technician to charge the refrigerant for you.

[Balticblue]

410A needs to have the bottle inverted upside down to charge properly as a liquid. If you charge it upright, it will fractionate the near-azeotropic mixture. R22 is a single component and can be charged as a gas.

[zameenwala]

You tell everything about gas charging step by step . Now No question is remain .
Full guide 👍💡

[djfayahbaby]

Am a car technician and was looking forward to adding this department to my business. Thanks for sharing

[pranavprasannan]

The low-pressure line is typically used for charging refrigerant gas, whereas the high-pressure line is used for charging refrigerant liquid. Liquid charging generally takes less time compared to gas charging.

[elnursafaraliyev]

Hi. Why need to connect high pressure line if we are not use that during charge refrigerant?

[cchansemicircle]

​​This is a very good video. Please my question is I added refrigerant to my 1hp Samsung spit AC when the power was turned off and I waited 10 hours to put the power on. Is it okay?

[EagleUSAA]

Thanks for making the video. It is easy to understand. but how do I know how many oz of refrigerant the machine needed to refill?
Thank you

[tbone]

A very helpful tip is to add 50ml of purified water to the compressor before regassing. This reduces corrosion and no need to vacuum

[otrovx]

Hi, thanks for the video. Is it necessary to attach the red hose to the air conditioner in order to fill it? I have simpler manifold gauge, with only blue and yellow hose (without red hose, and without red gauge).

[slobodanmilic]

Pls produce video about electrical connections.

[ganeshgarai]

What is the need of connect high pressure guage????

[starernhernh]

I m instrctor r/ac..but your mathed very

[densista]

can you fill using the red hose to the low pressure side?

[HunterRavin]

How to know when its time to close the blue vlv after letting air out

[densista]

one question, is the red hose to high pressure line, complete shut off all the process?

[QuangLe-egsi]

Could you explain to me what happens if we open high-pressure on-off valve when we charge refrigerant ( GAS ) in an AC UNIT ?

[HeraTaboro]

Please i need more information about Refrigeration and ac

[ewomazinoabugo]

Please i want to know using my single guage, on the PSI scale, what number should be the jogjest I'll let the gas reach in a 1.5hp inverter AC

[TrainingRoom]

Why connect high pressure cable to condensers if we not charge gas with them

[JayM-ut]

So, you technically do Do Not need to connect the red hose, since you never open that valve (adding R-22 to outside unit)? I noticed some charging kits only come with 1 hose and gauge? Thanks in advance