8. Electronic scale for refrigerant charging
ıı ı
ı
ˇı
ˇ ı
ˇ ı
ˇ ıBecause of the high pressure and fast vaporizing speed
of R410A, the refrigerant cannot be held in a liquid
phase inside the charging cylinder when charging is
done using the charging cylinder method, causing
bubbles to form in the measurement scale glass and
making it difficult to see the reading. (Naturally, the
conventional R22 charging cylinder cannot be used
because of the differences in the pressure resistance,
scale gradation, connecting port size, etc.)
ıı ı
ı
ˇı
ˇ ı
ˇ ı
ˇ ıThe electronic scale has been strengthened by using a
structure in which the weight detector for the refrigerant
cylinder is held by four supports. It is also equipped with
two connection ports, one for R22 *7/16 UNF, 20
threads) and one for R410A (1/2 UNF, 20 threads), so
it can also be used for conventional refrigerant charging.
ıı ı
ı
ˇı
ˇ ı
ˇ ı
ˇ ıThere are two types of electronic scales, one for 10-kg
cylinders and one for 20-kg cylinders. (The 10-kg
cylinder is recommended.)
Refrigerant charging is done manually by opening and
closing the valve.
9. Refrigerant cylinders
ıı ı
ı
ˇı
ˇ ı
ˇ ı
ˇ ıThe R410A cylinders are labeled with the refrigerant
name, and the coating color of the cylinder protector is
pink, which is the color stipulated by ARI of the U.S.
ıı ı
ı
ˇı
ˇ ı
ˇ ı
ˇ ıCylinder equipped with a siphon tube are available to
allow the cylinder to stand upright for liquid refrigerant
charging.
10. Charging orifice and packing for refrigerant cylinders
ıı ı
ı
ˇı
ˇ ı
ˇ ı
ˇ ıThe charging orifice must match the size of the charging
hose fitting (1/2 UNF, 20 threads).
ıı ı
ı
ˇı
ˇ ı
ˇ ı
ˇ ıThe packing must also be made of an HFC-resistant
material.
Fig. 7 Electronic scale for refrigerant charging
Fig. 8 Refrigerant cylinders
Fig. 9 Charging orifice and packing
10.2.3.
R410A Tools Which Are Usable for R22 Models
Table 9 R410A tools which are usable for R22 models
R410A tools
Usable for R22 models
(1)
Copper tube gauge for clearance adjustment
OK
(2)
Flaring tool (clutch type)
OK
(3)
Manifold gauge
NG
(4)
Charging hose
NG
(5)
Vacuum pump adaptor
OK
(6)
Electric gas leak detector for HFC refrigerant
NG
(7)
Electronic scale for refrigerant charging
OK
(8)
Refrigerant cylinder
NG
(9)
Charging orifice and packing for refrigerant cylinder
NG
43
CS-YW9DKE / CU-YW9DKE / CS-YW12DKE / CU-YW12DKE
