Required Tools - Toshiba RAS-07PKVP-E Service Manual

High Wall, Heat Pump Type
2-3. Tools

2-3-1. Required Tools

The service port diameter of packed valve of the outdoor unit in the air-water heat pump 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.
• Tools exclusive for R410A (Those which cannot be used for conventional refrigerant (R22))
• Tools exclusive for R410A, but can be also used for conventional refrigerant (R22)
• 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
1 Flare tool
Copper pipe gauge for
2
adjusting projection margin
Torque wrench
3
(For Ø12.7)
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 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 equipment 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, Ø9.52)
3. Pipe cutter
Also prepare the following equipment for other installation method and run check.
1. Clamp meter
2. Thermometer
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
4. Reamer
5. Pipe bender
6. Level vial
7. Screwdriver (+, –)
8. Spanner or Monkey wrench
3. Insulation resistance tester
4. Electroscope
17
R410A
air-water heat pump installation
Existence of new Whether conventional
equipment for equipment can be
R410A used
Yes *(Note 1)
Yes *(Note 1)
Yes
Yes
Yes
Yes Yes
Yes
Yes
*(Note 2)
9. Hole core drill (Ø65)
10. Hexagon wrench
11. Tape measure
12. Metal saw
Service Manual
Conventional air-water
heat pump installation
Whether new equipment
can be used with
conventional refrigerant
Yes
*(Note 1)
No No
No No
No Yes
Yes
No No
No Yes
No No
Opposite side 4mm)