Tools - Toshiba RAV-RM301KRTP Series Service Manual

6-3. Tools

6-3-1. Required Tools
The service port diameter of packed valve of the outdoor unit in the air-water heat pump using R32 or 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 R32 or R410A (Those which cannot be used for conventional refrigerant (R22))
2. Tools exclusive for R32 or R410A, but can be also used for conventional refrigerant (R22)
3. Tools commonly used for R32 or R410A and for conventional refrigerant (R22)
The table below shows the tools exclusive for R32 or R410A and their interchangeability.
Tools exclusive for R410A (The following tools for R32 or R410A are required.)
Tools whose specifications are changed for R32 or R410A and their interchangeability
No. Used tool
1 Flare tool
Copper pipe gauge for
2
adjusting projection margin
3 Torque wrench
4 Gauge manifold
5 Charge hose
6 Vacuum pump adapter
Electronic balance for
7
refrigerant charging
8 Refrigerant cylinder
9 Leakage detector
10 Charging cylinder
(Note 1) When flaring is carried out for R32 or 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 R32 or R410A is being currently developed.
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
3) Pipe cutter
4) Reamer
5) Pipe bender
6) Level vial
Also prepare the following equipments for other installation method and run check.
1) Clamp meter
2) Thermometer
Usage
Existence of
new equipment
for R410A
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
General tools (Conventional tools can be used.)
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R32 or R410A
air-water heat pump installation
Whether conventional
equipment can be
used
Yes ∗ (Note 1)
Yes ∗ (Note 1)
×
Yes
×
Yes
×
Yes
×
Yes
×
Yes
×
Yes
×
(Note 2)
7) Screwdriver (+, –)
8) Spanner or Monkey wrench
9) Hole core drill (Ø65)
10) Hexagon wrench (Opposite side 4mm)
11) Tape measure
12) Metal saw
3) Insulation resistance tester
4) Electroscope
FILE NO. SVM-18059
Conventional air-water
heat pump installation
Whether new equipment
can be used with
conventional refrigerant
¡
∗ (Note 1)
×
×
¡
¡
×
¡
×