FILE NO. SVM-05026
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2-3. Tools
2-3-1. Required tools
The service port diameter of packed valve of the outdoor unit in the air conditioner using R-410A is changed to
prevent mixing of other refrigerant. To reinforce the pressure-resisting strength, flare processing dimensions and
opposite side dimension of flare nut (For
∅
12.70 copper pipe) of the refrigerant piping are lengthened.
The used refrigerating oil is changed, and mixing of oil may cause a trouble such as generation of sludge,
clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types.
(1) Tools exclusive for R-410A (Those which cannot be used for conventional refrigerant (R-22))
(2) Tools exclusive for R-410A, but can be also used for conventional refrigerant (R-22)
(3) Tools commonly used for R-410A and for conventional refrigerant (R-22)
The table below shows the tools exclusive for R-410A and their interchangeability.
Tools exclusive for R-410A (The following tools for R-410A are required.)
Tools whose specifications are changed for R-410A and their interchangeability
R-410A air conditioner
Conventional air
installation
conditioner installation
No.
Used tool
Usage
Existence of
Whether
Whether new equipment
new equipment
conventional
can be used with
for R-410A
equipment can
conventional refrigerant
be used
1
Flare tool
Pipe flaring
Yes
*(Note 1)
2
Copper pipe gauge
Flaring by
for adjusting projection
conventional flare
Yes
*(Note 1)
*(Note 1)
margin
tool
3
Torque wrench
Connection of
Yes
(For
∅
12.70)
flare nut
4
Gauge manifold
5
Charge hose
6
Vacuum pump adapter
Vacuum evacuating
Yes
7
Electronic balance for
Refrigerant charge
Yes
refrigerant charging
8
Refrigerant cylinder
Refrigerant charge
Yes
9
Leakage detector
Gas leakage check
Yes
!
Charging cylinder
Refrigerant charge
(Note 2)
Evacuating,
refrigerant charge,
Yes
run check, etc.
(Note 1)
When flaring is carried out for R-410A using the conventional flare tools, adjustment of projection
margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.
(Note 2)
Charging cylinder for R-410A is being currently developed.
General tools (Conventional tools can be used.)
In addition to the above exclusive tools, the following equipments which serve also for R-22 are necessary as
the general tools.
(1) Vacuum pump
(4) Reamer
(9) Hole core drill (
∅
65)
Use vacuum pump by
(5) Pipe bender
(10) Hexagon wrench
attaching vacuum pump adapter. (6) Level vial
(Opposite side 5 mm)
(2) Torque wrench (For
∅
6.35)
(7) Screwdriver (+, –)
(11) Tape measure
(3) Pipe cutter
(8) Spanner of Monkey wrench
(12) Metal saw
Also prepare the following equipments for other installation method and run check.
(1) Clamp meter
(3) Insulation resistance tester
(2) Thermometer
(4) Electroscope
