LG Electronics 705371 User Manual

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Refrigerant Piping Connections

Due to our policy of continuous product innovation, some specifications may change without notification.

MULTI

MAX

MULTI

Charging the Refrigerant

1. Determine the refrigerant that is needed, applying the necessary formulas as outlined in the previous pages.

2. Connect the charging cylinder to the charge hose on the manifold valve.

3. Purge air from the charge hose by opening the valve at the bottom of the cylinder, and press the check valve on the manifold valve.

4. Confirm that the “Lo” knob of the manifold valve is open and charge the system with liquid refrigerant. (Because R-410A is a non-azeo-

trope refrigerant, it must be charged in the liquid state.)

• If the required amount of refrigerant cannot be charged all at once, the refrigerant can be charged a little at a time (approximately 5.29

ounces) while the system operates in cooling. This procedure must be repeated until the entire amount of refrigerant gets charged into

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5. Immediately disconnect the charge hose from the service port on the three-way valve. Stopping halfway allows the refrigerant to

discharge.

• If the system has been charged with liquid refrigerant while it operates, turn the system off before disconnecting the hose.

6. Mount the valve stem nuts and the service port nut. Use torque wrench to tighten the service port nut to a torque of 1.8 kg.m and check

for leaks.

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Refrigerant

Cylinder

Outdoor Unit

Indoor Unit

Liquid Piping

Gas Piping

Open

Three-Way

Valve

Three-Way

Valve

OPEN

Open

Check Valve

(One)

Vacuum

Gauge

Figure 59: Charging the Refrigerant.

Refrigerant Charge

REFRIGERANT PIPING PREPARATION

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LG Electronics 705371 LG Dual Zone Mini Split Air Conditioner System with 48000 BTU Cooling Capacity, 2 Indoor Units, and Outdoor Unit