Checking the Drainage, Forming the Pipings and Long Pipe Setting

Evacuation

1.Connect the charge hose end described in the preceding steps to the vacuum pump to evacuate the tubing and indoor unit.

Confirm the "Lo" knob of the manifold valve is open. Then, run the vacuum pump.

The operation time for evacuation varies with tubing length and capacity of the pump. The following table shows the time required for evacuation.

Required time for evacuation when 30 gal/h vacuum

pump is used

If tubing length is less

If tubing length is longer

than 10m (33 ft)

than 10m (33 ft)

 

 

10 min. or more

15 min. or more

2.When the desired vacuum is reached, close the "Lo" knob of the manifold valve and stop the vacuum pump.

Finishing the job

1.With a service valve wrench, turn the valve stem of liquid side valve counter-clockwise to fully open the valve.

2.Turn the valve stem of gas side valve counter-clockwise to fully open the valve.

3.Loosen the charge hose connected to the gas side service port slightly to release the pressure, then remove the hose.

4.Replace the flare nut and its bonnet on the gas side ser- vice port and fasten the flare nut securely with an adjustable wrench. This process is very important to pre- vent leakage from the system.

5.Replace the valve caps at both gas and liquid side service valves and fasten them tight.

This completes air purging with a vacuum pump.

The air conditioner is now ready for test running.

NOTICE

:Repeat evacuation procedure for each indoor unit.

 

 

Indoor unit

 

Outdoor unit

 

 

Manifold valve

Pressure

Hi

gauge

Lo

 

 

 

Open

Close

 

Vacuum pump

Service Manual 37

Page 37
Image 37
LG Electronics AMNH123DEA0 (LMN120HE) Evacuation, Finishing the job, Repeat evacuation procedure for each indoor unit

AMNC093APM0(LMAN090CNS), AMNH123DEA0 (LMN120HE), A2UC243FA0 (LMU240CE), AMNH123APM0(LMAN120HNS), A2UH243FA0(LMU240HE) specifications

LG Electronics has established a prominent position in the HVAC (heating, ventilation, and air conditioning) market with its diverse range of air conditioning units, including models AMNH123APM0 (LMAN120HNS), AMNH123DEA0 (LMN120HE), AMNC123DEA0 (LMN120CE), A2UH243FA0 (LMU240HE), and A2UC243FA0 (LMU240CE). Each of these models is designed to provide efficient cooling and heating solutions, boasting advanced technologies and user-friendly features.

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The AMNC123DEA0 (LMN120CE) is another compelling choice, featuring a sleek design that fits seamlessly into any décor. It operates efficiently in various weather conditions, maintaining a consistent indoor climate year-round. Its smart diagnostic system simplifies maintenance, allowing for timely troubleshooting and ensuring long-term reliability.

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In conclusion, LG Electronics offers a range of HVAC solutions with its AMNH123APM0, AMNH123DEA0, AMNC123DEA0, A2UH243FA0, and A2UC243FA0 models. With energy-efficient technology, user-friendly features, and advanced performance capabilities, these air conditioning units are designed to meet the diverse cooling and heating needs of modern consumers while ensuring environmental sustainability.