41
EN
Tools
A) Pressure gauge assembly
Conventional pressure gauge assemblies may not be used for R410Arefrigerantbecause
it has a greater operating pressure than R22 refrigerant. The sizes of bothpressure gauge
assembly pipe taps for R410Arefrigerant have been modified, to prevent accidental recharging
with other types of refrigerant.
B) Recharge pipe
The thickness and material of the R410Arefrigerant recharge pipe have been modifiedto make
it compatible with this HFC as well as oils. As for the pressure gaugeassembly, the size of the
recharge pipe connection is also modified.
C) Electronic scale for refrigerant recharge
Due to its high pressure and speed of evaporation, R410A refrigerant may not be maintained
in a liquid state; as a result, refrigerant gas bubbles form inside the cylinder, making it difficult
to read the recharge values, and it is therefore recommended that anelectronic scale be used
to be sure of the values. The electronic scale for the refrigerant recharge consists of a struc-
ture with four support points to measure the weight of the refrigerant cylinder. The recharge
pipe which connects the two parts is fitted with two connections; it can therefore also be used
to recharge with conventional refrigerant. Two types of electronic scales are available: one for
10kg cylinders and the otherfor 20kg cylinders. The refrigerant is recharged by opening/clo-
sing the valve.
D) Dynamometric spanner
The dynamometric spanner for nominal ø of 1/2” and 5/8” has a different size on each side to
comply with the modified measurements of the pipe unions.
E) Clamp-shaped pipe vice
The pipe vice for R410A is fitted with a clamp which has a receiving opening so that the cop-
per pipe projection may be regulated to 0-0,5mm, during the processing of the pipe connec-
tion.
F) Calibration assembly for projection adjustment
This is a 1mm thick gauge which facilitates the projection of the copper pipe from the fixing
clamp.
G) Vacuum pump transition fitting
The use of a transition fitting is necessary to prevent the oil from the pump returning towards
the recharge pipe, thereby contaminating the refrigerant, with subsequent damage to the air
conditioning unit.
H) Refrigerant cylinder
The special cylinder for R410Ais pink and it has the name of the refrigerant on it.
I)Recharge connection and refrigerant cylinder seal
A1/2 UNF 20 thread/inch and corresponding seal are necessary.
L) Leak detector
For R410A, a special leak detector for HFC refrigerants is used. It must have a high detection
sensitivity.
8. PIPING AND CONNECTIONS
23
2.4 Tools
A) Pressure gauge assembly
Conventional pressure gauge assemblies may not be used for R410A refrigerant
because it has a greater operating pressure than R22 refrigerant. The sizes of both
pressure gauge assembly pipe taps for R410A refrigerant have been modified, to pre-
vent accidental recharging with other types of refrigerant.
B) Recharge pipe
The thickness and material of the R410A refrigerant recharge pipe have been modified
to make it compatible with this HFC as well as oils. As for the pressure gauge
assembly, the size of the recharge pipe connection is also modified.
C) Electronic scale for refrigerant recharge
Due to its high pressure and speed of evaporation, R410A refrigerant may not be main-
tained in a liquid state; as a result, refrigerant gas bubbles form inside the cylinder,
making it difficult to read the recharge values, and it is therefore recommended that an
electronic scale be used to be sure of the values. The electronic scale for the refrige-
rant recharge consists of a structure with four support points to measure the weight of
the refrigerant cylinder. The recharge pipe which connects the two parts is fitted with
two connections; it can therefore also be used to recharge with conventional refrige-
rant. Two types of electronic scales are available: one for 10kg cylinders and the other
for 20kg cylinders. The refrigerant is recharged by opening/closing the valve.
D) Dynamometric spanner
The dynamometric spanner for nominal ø of 1/2” and 5/8” has a different size on each
side to comply with the modified measurements of the pipe unions.
E) Clamp-shaped pipe vice
The pipe vice for R410A is fitted with a clamp which has a receiving opening so that
the copper pipe projection may be regulated to 0-0,5 mm, during the processing of the
pipe connection.
F) Calibration assembly for projection adjustment
This is a 1mm thick gauge which facilitates the projection of the copper pipe from the
fixing clamp.
G) Vacuum pump transition fitting
The use of a transition fitting is necessary to prevent the oil from the pump returning
towards the recharge pipe, thereby contaminating the refrigerant, with subsequent
damage to the air conditioning unit.
H) Refrigerant cylinder
The special cylinder for R410A is pink and it has the name of the refrigerant on it.
I) Recharge connection and refrigerant cylinder seal
A 1/2 UNF 20 thread/inch and corresponding seal are necessary.
L) Leak detector
For R410A, a special leak detector for HFC refrigerants is used. It must have a high
detection sensitivity.
Tools
fo
r R41
0
Applicable
fo
r R22
A
pressure gauge assembly
no
B
recharge pipe
no
C
electronic scale for refrigerant recharge
yes
D
dynamometric spanner (nominal ø 1/2, 5/8)
no
E
tool for pipe connection (clamp type)
yes
F
calibration assembly for projection adjustment
yes
G
vacuum pump transition fitting
yes
H
refrigerant cylinder
no
I
recharge connection and refrigerant cylinder seal
no
L
leak detector
no
Содержание PS09 18HI
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