13
4. Tools
(1) Required Tools for R410A
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 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.
Tools exclusive for R410A (The following tools for R410A are required.)
Tools whose specifications are changed for R410A and their interchangeability
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
Charging cylinder
Usage
Pipe flaring
Flaring by
conventional flare tool
Connection of flare nut
Evacuating, refrigerant
charge, run check, etc.
Vacuum evacuating
Refrigerant charge
Refrigerant charge
Gas leakage check
Refrigerant charge
Conventional air
conditioner installation
Whether new equipment
can be used with
conventional refrigerant
Yes
*(Note 1)
No
No
Yes
Yes
No
Yes
No
R410A
air conditioner installation
Existence of
Whether conven-
new equipment tional equipment
for R410A
can be used
Yes
*(Note 1)
Yes
*(Note 1)
Yes
No
Yesa
No
Yes
No
Yes
Yes
Yes
No
Yes
No
(Note 2)
No
(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.
General tools (Conventional tools can be used.)
In addition to the above exclusive tools, the following equipments which serve also for R22 are neces-
sary as the general tools.
(1) Vacuum pump
Use vacuum pump by
attaching vacuum pump adapter.
(7) Screwdriver (+, –)
(2) Torque wrench
(8) Spanner or Monkey wrench
(3) Pipe cutter
(9) Hole core drill
(4) Reamer
(10) Hexagon wrench (Opposite side 4mm)
(5) Pipe bender
(11) Tape measure
(6) Level vial
(12) Metal saw
Also prepare the following equipments for other installation method and run check.
(1) Clamp meter
(3) IInsulation resistance tester
(2) Thermometer
(4) Electroscope
FILE NO. SVM-1
40
7
8
