4. Tools
1. Required Tools for R32
Mixing of different types 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 R32 (Those which cannot be used for conventional refrigerant (R22))
2) Tools exclusive for R32 but can be also used for conventional refrigerant (R22)
3) Tools commonly used for R32 and for conventional refrigerant (R22)
The table below shows the tools exclusive for R32 and their interchangeability.
Tools exclusive for R32 (The following tools for R32 are required.)
Tools whose specifications are changed for R32 and their interchangeability
(Note) When flaring is carried out for R32 using the conventional flare tools, adjustment of projection
margin is necessary. For this adjustment, a copper pipe gauge, etc. are necessary.
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. 7) Screwdriver (+, –)
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No. Used tool
Flare tool
Copper pipe gauge for
adjusting projection margin
Torque wrench
Gauge manifold
Charge hose
Vacuum pump adapter
Electronic balance for
refrigerant charging
Refrigerant cylinder
Leakage detector
Usage
Pipe flaring
Flaring by conventional
flare tool
Tightening of flare nut
Evacuating, refrigerant
charge, run check, etc.
Vacuum evacuating
Refrigerant charge
Refrigerant charge
Gas leakage check
R32
air conditioner installation
Existence of Whether conven-
new equipment tional equipment
for R32
can be used
Yes *(Note)
Yes *(Note)
Yes No
Yes No
Yes No
Yes Yes
Yes No
Yes No
Conventional air
conditioner installation
Whether conventional
equipment can be used
Yes
*(Note)
No
No
Yes
Yes
No
Yes
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