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• LG LRBP1031W - 10 Cu. Ft. Cabinet Depth Bottom Freezer Refrigerator Owner's Manual

LG LRBP1031W - 10 Cu. Ft. Cabinet Depth Bottom Freezer Refrigerator Owner's Manual

Download Owner's manual of LG LRBP1031NI Refrigerator for Free or View it Online on All-Guides.com. This version of LG LRBP1031NI Manual compatible with such list of devices, as: LRBP1031NI, LRBP1031T, LRBP1031W, LRBP1031W - 10 Cu. Ft. Cabinet Depth Bottom Freezer Refrigerator

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SERVICING PRECAUTIONS

Air Recharging in Compressor

Test the refrigeration by connecting it electrically before

refilling operation. It is necessary to ascertain the function

of the meter-compressor and identify the defects

immediately. If defects have been found, empty the old

system of possible R134a residue by breaking off the end

of the extension piece at its narrow point. (Figure 1)

Replace the filter and any damaged components. Unsolder

and pull off the piece remaining inside the service tube and

then attach an complete extension with male Hansen, and

solder it to the same tube again. (Figure 2)

POINT TO BE

BROKEN

SERVICE TUBE EXTENSION

CHARGE TUBE

EXTENSION

MALE HANSEN

SOLDERING POINT

Figure 1 Figure 2

It is necessary to execute the soldering operation with

valve open so that the fumes caused by oil residue can

come out freely without blowholes between two tubes

during the heating of the point to be soldered.

The extension fitted with the male Hansen is connected to

the female fitting of the vacuum pump tube. (Figure 3)

UM

PRESSURE

GAUGE

igure 3

Air evacuating from the system begins as soon as the

pump starts. The refrigeration system must be kept under

vacuum until the reading on the low-pressure gauge

indicates vacuum (0 absolute, -1 atm., -760 mm hg) in any

case it is advisable to keep the pump running for about 30

minutes. (Figure 3)

In case that a considerable leakage occurs it will be

necessary to stop the vaccum pump and to add a small

quantity of Freon to the system, if vacuum should not be

obtained (pressure gauge can't fall to 1 atmosphere), start

the refrigeration unit and find the leakage with the special

leak-finder. When the defective soldering point is visible,

re-do it after opening the extension tube valve and

reestablishing the normal outside pressure inside the

group.

Because the melted alloy is sucked into the tubes and

blocks them, the pressure must be rebalanced when

vacuum is in the system in soldering. As soon as the

vacuum operation is over, add the quantity in grams of

R134a to the refrigeration system. Remember that every

system has an exact quantity of R134a with a tolerance of

+5 grams that can be added. (Figure 4)

q\ i TO TiE R134a CYLINDER

'__ TOsTTHEEMREFRiGEF_lr_ N4

Before performing this operation (if the vacuum pump and

refilling cylinder are connected), make sure that the valve

placed between the vacuum pump and the refilling tube are

closed in order to keep the Freon for addition to the system.

(Figure 5)

FILLING OR VALVE TO BE OPENED

CHARGE TUBE WHEN REFILLING

TO THE REFRIGERATION TO THE CHARGE

SYSTEM CYLINDER

VALVE TO BE CLOSED

AFTER VACUUM

TO THE VACUUM PUMP

Figure 5

In addition, check the graduated scale on the cylinder for

the quantity of R134a to be added, for example, if we have

750 grams of Freon in the cylinder and must add 165

grams to the group, this amount will be reached when R-

134a has dropped to 585 grams, remembering that the

indicator shows a lower limit of meniscus. De this after

choosing the scale corresponding to the gas pressure

different scales reported as the same gas pressure

indicated by the pressure gauge on the top of the column.

To make R134a flow into the system, open the valve

placed at the base of the cylinder and connected to the

filling tube. The amount of Freon cannot be added to the

system all at once because it may cause a blocking of

the motor-compressor. Therefore, proceed by adding the

original quantity of about 20-30 grams and close the valve

immediately.

The pressure rises and the motor compressor must start

sucking the gas and lowering the pressure again.

Regulate the valve again, in the safe way until reaching the

quantity of R134a established for the system being

charged. When the system is running, the suction pressure

must be stabilized between 0.30 to 0.6 atmosphere.

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