Service Tools
SiE33-003
178
New Refrigerant R-407C
Tool name
Diference from previous tool
New tool specifications
2. Torque wrench
Change of dimension B
Size increase only for 1/2” and
5/8” pipes
Class-1 pipes : R-407C
DimensionB
Unit:mm
Nominal size
Class-1
Previous
1/2
24
24
3/8
27
27
No change in tightening torque
No change in pipes of other sizes
3. Vacuum pump with check valve
Reverse flow prevetive vacuum adaptor
Must be equipped with a
mechanism to prevent reverse
oil flow.
Previous vacumm pump can be
used by installing adaptor.
EX.) Left side of the left fig. (Tasco Japan)
Discharge speed 50L/min (50Hz)
60L/min (60Hz)
Maximum degree of vacuum 5
×
10
–6
Torr
Suction port UNF7/16-20 (1/4”flare)
UNF1/2-20 (5/16”flare) with adaptor
4. Leak tester
Previous testers detected
chlorine.
Since HFCs do not contain
chlorine, new testers detect
hydrogen.
Hydorogen detecting type
Applicabe refrigerants
R410A, R-407C, R404A, R507AR134a,etc.
5. Refrigerant oil
(Air Compal)
Can be used for HFC and
HCFC units.
Contains synthetic oil, therefore it can be
used for all types of refrigerant piping.
Offers high rust resistance and stability over
long period of time.
6. Gauge manifold for R-407C
Charge hose
(Hose adator with ball value)
Oil and refrigerant types are
different.
(Previous gauge manifold
cannnot be used.)
High pressure gauge
–0.1~3.5Mpa (–76cmHg~35kg/cm
²
)
Low pressure gauge
–0.1~1.5Mpa (–76cmHg~cm
²
)
1/4”
Available with and without hand-operate
valve that prevents refrigerant from
escaping from hose.
No oil is used in pressure test of gauges.
→
Prevention of gauge contamination
Temperature graduation indicates the
relationship between pressure and
temperature in gas saturation condition.
Si33-003.book Page 178 Monday, June 25, 2001 9:06 AM
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