AH-X13 (serv.man14). Refridgerant piping installation for air conditioners using R-410A - Sharp Air Conditioner Service Manual (repair manual). Page 9

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h) After securing the caps on the control valves, check the capsÅf periphery if there is any gas leakage. 

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4

 

7

(2)  Additional Refrigerant Charging Required for Refrigerant Piping Length Longer Than Standard Length (The

following steps should be taken following the step e) in (1) above. See Fig. 7)

a) Set the refrigerant cylinder to the electronic balance, and connect the connecting hoses on the cylinder and

electronic balanceÅfs connecting port.

Be sure to make setting so that liquid con be charged. When using a cylinder equipped with a siphon, liquid
can be charged without turning it upside down.

b) Connect the gauge manifoldÅfs charge hose to the electronic balanceÅfs connecting port. 

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2

c) Open the refrigerant cylindesÅfs valve, and, after opening the charging valve a little, close it. 

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2

d) After making zero (0) adjustment, open the charging valve and, by opening the gauge maniflod's valve Lo,

charge the liquid refrigerant. 

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5

e) When the designated amount of refrigrant could not be charged, make additional charging bit by bit by cooling

operation (for the amount of each addition, follow the instruction manual prepared by the equipment
manufacturer) . If the first additional charging was not enough, make the second additional charging after about
one miunte in the same manner as the first additional charging.

Be sure never to charge a large amount of liquid refrigerant at once to the unit in cooling mode, since liquid

is charged from the gas siede.

f)

After charging liquid refrigerant into the air conditioner by closing the charging valve, stop operation by fully

closing the gauge manifold's valve Lo. 

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g) Quickly remove the charge hose from the service port. 

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When stopped halfway, refrigerant being cycled will be released.

Compound pressure
gauge

Control valve (2-way)

Control valve 
(3-way)

Service port

Charge hose

Handle Lo

Handle Hi (always closed)

Charge hose

Gauge manifold

Vacuum pump adapter

Vacuum pump

76cmHg

Caution:
      Be sure to use the vacuum pump,
      adapter and gauge manifold to refer to
      tion manuals beforehand.
      Ascertion that the vacuum pump is fille
      the level designated on the oil gauge.

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5

1

3

4

7

8

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