NOTES

—Replacement of the refrigeration cycle.

1.When replacing the refrigeration cycle, be sure to discharge the refrigerant system using a FreonTM recovery System.

If there is no valve to attach the recovery system, install one (such as a WATCO A-1) before venting the FreonTM. Leave the valve in place after servicing the system.

2.After discharging the unit completely, remove the desired component, and unbrace the pinch-off tubes.

3.Solder service valves into the pinch-off tube ports, leaving the valves open.

4.Solder the pinch-off tubes with Service valves.

5.Evacuate as follows.

1)Connect the vacuum pump, as illustrated Fig. 17A.

2)Start the vacuum pump, slowly open manifold valves A and B with two full turns counterclockwise and leave the valves closed. The vacuum pump is now pulling through valves A and B up to valve C by means of the manifold and entire system.

CAUTION

If high vacuum equipment is used, just crack valves A and B for a few minutes, then open slowly with the two full turns counterclockwise. This will keep oil from foaming and being drawn into the vacuum pump.

3)Operate the vacuum pump for 20 to 30 minutes, until 600 microns of vacuum is obtained. Close valves A and B, and observe vacuum gauge for a few minutes. A rise in pressure would indicate a possible leak or moisture remaining in the system. With valves A and B closed, stop the vacuum pump.

4)Remove the hose from the vacuum pump and place it on the charging cylinder. See Fig. 17B. Open valve C.

Discharge the line at the manifold connection.

5)The system is now ready for final charging.

6.Recharge as follows :

1)Refrigeration cycle systems are charged from the High-side. If the total charge cannot be put in the High-side, the balance will be put in the suction line through the access valve which you installed as the system was opened.

2)Connect the charging cylinder as shown in Fig. 17B. With valve C open, discharge the hose at the manifold connection.

3)Open valve A and allow the proper charge to enter the system. Valve B is still closed.

4)If more charge is required, the high-side will not take it. Close valve A.

5)With the unit running, open valve B and add the balance of the charge.

a.Do not add the liquid refrigerant to the Low- side.

b.Watch the Low-side gauge; allow pressure to rise to 30 lbs.

c.Turn off valve B and allow pressure to drop.

d.Repeat steps B and C until the balance of the charge is in the system.

6)When satisfied the unit is operating correctly, use the pinch-off tool with the unit still running and clamp on to the pinch-off tube. Using a tube cutter, cut the pinch-off tube about 2 inches from the pinch-off tool. Use sil-fos solder and solder pinch-off tube closed. Turn off the unit, allow it to set for a while, and then test the leakage of the pinch-off connection.

—11—

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LG Electronics LT1230CR, BG-101A, BG-123A, BG-81A, LT080CSG, LT121CSG service manual
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LT121CSG, BG-123A, BG-101A, LT1230CR, BG-81A specifications

LG Electronics is renowned for its cutting-edge home appliances and electrical devices, and its range of air conditioning units is no exception. Among the standout models are the LT080CSG, BG-81A, LT1230CR, BG-101A, and BG-123A. Each model showcases a blend of advanced technology, user-friendly features, and energy efficiency.

The LG LT080CSG is a compact wall-mounted air conditioning unit designed for smaller spaces. It includes a high-efficiency inverter compressor that provides consistent cooling while minimizing energy consumption. The LT080CSG features a sleek design and quiet operation, making it an ideal choice for bedrooms or home offices. Its easy-to-use remote control allows users to adjust settings from anywhere in the room.

The BG-81A is a versatile portable air conditioner that offers great flexibility in cooling. With its movable design, it provides comfort wherever needed without the constraints of permanent installation. The BG-81A is equipped with a programmable timer and multiple fan speeds, enabling users to customize their cooling experience. Its self-evaporative system enhances efficiency by reducing the need for constant drainage.

Next in line is the LT1230CR, a powerful split air conditioning system capable of providing efficient cooling for larger areas. This model integrates advanced inverter technology that adjusts the compressor speed according to the temperature, ensuring an optimal indoor climate while saving energy. The LT1230CR also features a fast cooling mode, facilitating quick temperature adjustments in hot weather conditions.

The BG-101A is another standout portable option, offering a blend of utility and performance. Designed with a sleek exterior, it boasts an easy-to-use LED display and eco-friendly refrigerant that contributes to lower environmental impact. The BG-101A includes a dehumidifying function, making it particularly useful in humid climates. Its filter is washable, ensuring easy maintenance and long-lasting performance.

Lastly, the BG-123A is designed for both portability and high performance. It harnesses LG’s advanced cooling technologies to deliver powerful air flow and quick cooling capabilities. With a lightweight design and caster wheels, the BG-123A can easily move between rooms. This model also emphasizes quiet operation, making it suitable for any environment without disrupting activities.

Together, these LG air conditioning models exemplify the brand's commitment to innovation and customer satisfaction, offering smart solutions for various cooling needs while ensuring ease of use and energy efficiency.
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