AH-X13 (serv.man14). Refridgerant piping installation for air conditioners using R-410A - Sharp Air Conditioner Service Manual (repair manual). Page 8

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h) Refrigerant Cylinder

A refrigerant cylinder exclusive for R410A comes identified with refrigerant name and is coated with pink
paint as designated by the ARI, U. S. A

i)

Charge Port and Packing for Refrigerant Cylinder

According to the charge hose's cap size, a charge port with 1/2 UNF 20 threads per inch and
corresponding packing are required.

j)

Gas Leakage Detector

A high sensitivity gas leakage detector exclusive for HFC refrigerant is used. In the case of R410A, the
detection sensitivity is about 23 g per year.

(2) General Tools

a)   Vacuum pump
b)   Torque wrench

for 1/4 : opposite side 17 mm x
for 1/4 : opposite side 17 mm x
for 3/8 : opposite side 22 mm x

c)   Pipe cutter
d)   Reamer
e)   Screwdriver (+,   )
f )   Hacksaw

g)   Hole core drill (Ø65 or 70)
h)   Hexagonal wrench (opposite side 4 or 5 mm)
i )   Spanner, or monkey wrench
j )   Tape measure
k)   Thermometer
l )   Clamping ampere meter

m)  Insulation resistance tester (mege tester)

n)  Electro circuit tester
o)  Pipe bender

(16 N  m)
(160 kgf  cm)

(18 N  m)
180 kgf  cm)
(42 N  m)
(420 kgf  cm)

(3) Applicability or R410A Tools to R22 Model

Gauge manifold

Tools for R410A

Applicable to R22 model

Charge hose

Electronic balance for refrigerant charging
Torque wrench (norminal diameter 1/2, 5/8)

Flare tool (clutch type)

Gauge for projection adjustment

Vacuum pump adapter
Refrigerant cylinder

Charge port and packing for refrigerant cylinder

Gas leakage detector

Used when conventional flare tool (clutch type) is used.

Note: For inquiry, contact your agent.

a)

b)

c)

d)

e)

f)

g)

h)

i)

j)

(1) Air Purge by Vacuum Pump and Gas Leakage Inspection (See Fig. 6)

a) Connect the charge hose to the outdoor unit. 

1

b) Connect the charge hose to the vacuum pump adapter. 

2

At this time, keep the control valves in the fully closed position. 

3

 

4

c) Place the handle Lo in the fully opened position 

5

, and turn ON the vacuum pumpÅfs power switch.

During this step, perform evacuating (about 10~15 minutes); for the evacuating time, refer to the equipment
manufacturer's manual.

d)  When the compound gauge's pointer has indicated -0.1 MPa (-76 cmHg) 

6

, place the handle Lo in the fully

closed position 

5

, and turn OFF the vacuum pump's power switch.

Keep this state for 1 ~ 2 minutes, and ascertain that the compound gauge's pointer does not retum.

e) Fully open the control valves. 

3

 

4

f)

Detach the charge hoses. 

1

 

2

g) Tightly secure the cap on the service port. 

7