FILE NO. SVM-02007
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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
Ye s
(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
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