Panasonic CS-Z25UD3EAW Service Manual page 58

7. HFC refrigerant_Electric gas leakage tester
R32 refrigerant is often used for other mixed
refrigerant (R410A, R404A, R407C etc.). Therefore,
the usage of existing HFC detectors is possible, but in
order to detect more accurately, we recommend to
use detectors specially set and adjusted for R32
detection.
HFC refrigerant_Electric gas leakage tester
8. Digital scale for refrigerant charging
R32 and R410A have high pressure level and their
evaporation speed is high.
Thus, if you recover the refrigerant by cylinder
charging method, the refrigerant evaporates within the
weighing scale glass, which makes reading the scale
difficult, rather than liquidating the refrigerant into the
cylinder. (Charging cylinders for R22 have different
pressure resistance, scale, connection port size;
therefore, they are not usable) At the same time, the
digital scale for refrigerant charging is strengthened by
receiving the weight of the refrigerant cylinders with
four pillars at the corners. The connection ports of
charging hoses have two separate ports for R22 (7/16
UNF20) and R32/R410A (1/2 UNF20) therefore, they
can be used for the insertion of the existing
refrigerants.
Digital scale for refrigerant charging
9. Refrigerant cylinders
Refrigerant cylinders for R410A are painted in pink,
and the ones for R32 are painted in other colors that
might subject to change according to the international
standards. R32 is a single refrigerant, so that both
liquid and gas insertion are possible. Additional
charging is also possible.
(R410A is a mixed refrigerant, so only liquid insertion
is possible)
Refrigerant cylinders
10. Connection ports of refrigerant cylinders and
packing
Charging ports which fit to the charging hose
connection port size (1/2 UNF20) is needed. At the
same time, the packing has to be of HFC resistant
materials.
Connection ports and packing
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