Kia Sorento: Refrigerant Recovery/Recycling/Charging/Vacuum/Leak Test

Kia Sorento (MQ4, 2021-2026) Service Manual / Heating,Ventilation And Air Conditioning / Air Conditioning System / Refrigerant Recovery/Recycling/Charging/Vacuum/Leak Test

Refrigerant Recovery/Recycling/Charging/Vacuum/Leak Test (R-134a)

Equipped with R-134a recovery/recycling/charging equipment

Connect the R-134a recovery/recycling/charging equipment to the high-pressure service port (A) and low-pressure service port (B) by reading the refrigerant recovery/recycling/charging equipment instruction manual.

Heating,Ventilation And Air Conditioning — Air Conditioning System / Refrigerant Recovery/Recycling/Charging/Vacuum/Leak Test / Refrigerant Recovery/Recycling/Charging/Vacuum/Leak Test (R-134a) illustration

Refrigerant charging equipment should be installed on a flat surface so that it is easy to recover the refrigerant and in particular, the refrigerant can be accurately injected.

Refrigerant recovery operation

•

Use only service equipment that is U.L-listed and is certified to meet the requirements of SAE J2210 to remove HFC-134a (R-134a) from the air conditioning system.

•	Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat.

•	Be careful when connecting service equipment.

•	Do not breathe refrigerant or vapor.

•	If accidental system discharge occurs, ventilate work area before resume of service.

•	Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

1.	Measure the amount of refrigerant oil removed from the A/C system after the recovery process is completed. Be sure to install the same amount of new refrigerant oil back into the A/C system before charging.

Refrigerant system vacuum operation

•

Use only service equipment that is U.L-listed and is certified to meet the requirements of SAE J2210 to remove HFC-134a (R-134a) from the air conditioning system.

•	Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat.

•	Be careful when connecting service equipment.

•	Do not breathe refrigerant or vapor.

•	If accidental system discharge occurs, ventilate work area before resume of service.

•	Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

When an A/C System has been opened to the atmosphere, such as during installation or repair, it must be evacuated using an R-134a refrigerant Recovery / Recycling / Charging System. (If the system has been open for several days, the receiver / dryer should be replaced, and the system should be evacuated for several hours.)

2.	Connect an R-134a refrigerant Recovery / Recycling / Charging System to the high-pressure service port and the low-pressure service port as shown, following the equipment manufacturer's instructions.

3.	If the low-pressure does not reach more than 93.3 kPa (700 mmHg, 27.6 in.Hg) in 10 minutes, there is probably a leak in the system. Partially charge the system, and check for leaks (see Refrigerant Leak Test).

4.	Remove the low pressure valve from the low-pressure service port.

Refrigerant charge

•

Use only service equipment that is U.L-listed and is certified to meet the requirements of SAE J2210 to remove HFC-134a (R-134a) from the air conditioning system.

•	Air conditioning refrigerant or lubricant vapor can irritate your eyes, nose, or throat.

•	Be careful when connecting service equipment.

•	Do not breathe refrigerant or vapor.

•	If accidental system discharge occurs, ventilate work area before resume of service.

•	Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

1.	Connect an R-134a refrigerant Recovery / Recycling / Charging System to the high-pressure service port as shown, following the equipment manufacturer's instructions.

2.	Add the same amount of new refrigerant oil to system that was removed during recovery. Use only specified refrigerant oil. Charge the system with R-134a refrigerant. Do not overcharge the system the compressor will be damaged.

Regulated refrigerant capacity

Without rear A/C : 650 ± 25g (22.9 ± 0.88 oz.)

With rear A/C : 850 ± 25g (29.9 ± 0.88 oz.)

Leak test of refrigerant

•

Always conduct a leak test with an electronic leak detector whenever leakage or refrigerant is suspected and when conducting service operations which are accompanied by disassembly or removing or connection fittings.

In order to use the leak detector properly, read the manual supplied by the manufacturer.

•	If a gas leak is detected, proceed as follows:

1.	Check the torque on the connection fittings and, if too loose, tighten to the proper torque. Check for gas leakage with a leak detector.

2.	If leakage continues even after the fitting has been tightened, discharge the refrigerant from the system, disconnect the fittings, and check their seating faces for damage. Always replace, even if the damage is slight.

3.	Check the compressor oil and add oil if required.

4.	Charge the system and recheck for gas leaks. If no leaks are found, evacuate and charge the system again.

Refrigerant Recovery/Recycling/Charging/Vacuum/Leak Test (R-1234yf)

Install the refrigerant recovery/recycling/charging equipment

Connect the refrigerant recovery/recycling/charging equipment to the high-pressure service port (A) and low-pressure service port (B).

Refrigerant charging equipment should be installed on a flat surface so that it is easy to recover the refrigerant and in particular, the refrigerant can be accurately injected.

Refrigerant recovery operation

Perform the refrigerant recovery using the refrigerant recovery/recycling/charging equipment while the high and low-pressure valves open.

Never disconnect the air conditioning system until the refrigerant has been completely recovered. If it is separated before the recovery of the refrigerant is completed, be careful as the refrigerant and oil are discharged into the vehicle by the pressure in the air conditioner system and contaminate it.

•	If the refrigerant is recovered too quickly, it causes the compressor oil to drain from the system.

•	Refrigerant recovery must be performed with the high and low pressure valves opened. If only one valve is opened, the refrigerant recovery time increases.

2.	Measure the amount of compressor oil drained from the air conditioner system after the recovery operation is completed. Supplement the compressor oil drained when charging the air conditioner refrigerant.

Refrigerant system vacuum operation

When charging the refrigerant, the air conditioning system must be evacuated. This vacuum operation is performed to remove all the air and moisture that have flowed into the unit, and the system is performed the evacuating operation for more than 10 minutes after each part is installed.

1.	Perform the air conditioner system vacuum using the refrigerant recovery/recycling/charging equipment while the high and low-pressure valves open.

If the gauge is maintained in the vacuum zone for 10 minutes while the high and low pressure valves closed, the vacuum has been performed normally. If the pressure increases, there is a leak in the system, so repair the leak by the following order.

(1)	Charging the system with refrigerant charging equipment. (Refer to Refrigerant charge)

(2)	Check the refrigerant leak with leak detector and repair if leak is found. (Refer to Refrigerant leak test)

(3)	Drain the refrigerant again and evacuate the system.

After evacuating for more than 10 minutes, check the vacuum and close both high and low pressure valves. This state is ready for charging.

Compressor oil must be applied to the O-ring when assembling air conditioner parts, and cleanliness must be maintained to prevent foreign substances from entering, especially gloves.

Refrigerant charge

Replenish the capacity of discharged compressor oil by using refrigerant recovery/recycling/charging equipment while the high pressure valve is opened after vacuum the air conditioning system.

If the oil is not added when charging the refrigerant, the lubricity deteriorates due to insufficient of oil in the system, which cause problem such as compressor sticking.

Charge the refrigerant with specified capacity by using the refrigerant recovery/recycling/charging equipment while opening the high-pressure valve and then closing the high pressure valve.

Regulated refrigerant capacity

Without rear A/C : 575 ± 25 g (20.28 ± 0.88 oz.)

With rear A/C : 800 ± 25 g (28.22 ± 0.88 oz)

Do not overcharge the refrigerant as there is a risk of damage to the compressor.

3.	Check if the refrigerant is not leaking from the system with leak detector. (Refer to refrigerant leak test)

Leak test of refrigerant

When the refrigerant leak is suspected or the connection part is disassembled or loosened, perform the leak test with an electronic leak detector.

1.	Check the torque of the connection part, and if it is too loose, check the gas leak with leak detector after tightening it with the tightening torque.

2.	If leakage continues even after re-tightening the connection part, drain the refrigerant and separate the connection part to check the contact surface for damage. If there is even a small damage, replace it with a new one.

3.	Check the compressor oil and add oil if necessary.

4.	Charging the system and check for gas leakage. If there is no problem, evacuate the system before charging.

Description and Operation

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Kia Sorento: Refrigerant Recovery/Recycling/Charging/Vacuum/Leak Test

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