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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 R410A 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 Ø12,7 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 R410A (Those which cannot be used for conventional refrigerant (R22))
(2) Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)
(3) Tools commonly used for R410A and for conventional refrigerant (R22)
The table below shows the tools exclusive for R410A and their interchangeability.
Also prepare the following equipments for other installation method and run check.
(1) Clamp meter
(2) Thermometer
(4) Reamer
(5) Pipe bender
(6) Level vial
(7) Screwdriver (+, –)
(8) Spanner or Monkey wrench
(9) Hole core drill (Ø65)
(10) Hexagon wrench
(Opposite side 5mm)
(11) Tape measure
(12) Metal saw
(3) Insulation resistance tester
(4) Electroscope
General tools (Conventional tools can be used.)
In addition to the above exclusive tools, the following equipments which serve also for R22 are necessary
as the general tools.
(1) Vacuum pump
Use vacuum pump by
attaching vacuum pump adapter.
(2) Torque wrench (For Ø6,35)
(3) Pipe cutter
Tools exclusive for R410A (The following tools for R410A are required.)
Tools whose specifications are changed for R410A and their interchangeability
(Note 1) When flaring is carried out for R410A 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 R410A is being currently developed.
No. Used tool
Flare tool
Copper pipe gauge for
adjusting projection
margin
Torque wrench
(For Ø12,7)
Gauge manifold
Charge hose
Vacuum pump adapter
Electronic balance for
refrigerant charging
Refrigerant cylinder
Leakage detector
Charging cylinder
Usage
Pipe flaring
Flaring by
conventional flare
tool
Connection of flare
nut
Evacuating, refriger-
ant charge, run
check, etc.
Vacuum evacuating
Refrigerant charge
Refrigerant charge
Gas leakage check
Refrigerant charge
R410A air conditioner
installation
Existence of Whether
new equipment conventional
for R410A equipment can
be used
Ye s
*
(Note 1)
Ye s
*
(Note 1)
Ye s
X
Ye s
X
Ye s
X
Ye s
X
Ye s
X
Ye s
X
(Note 2)
X
Conventional air
conditioner installation
Whether new equip-
ment can be used with
conventional refriger-
ant
¡
*
(Note 1)
X
X
¡
¡
X
¡
X