High Wall, Heat Pump Type
Service Manual
17
Toshiba
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
* (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.
Also prepare the following equipment for other installation method and run check.
No. Used tool Usage
R410A
air-water heat pump installation
Conventional air-water
heat pump installation
Existence of new
equipment for
R410A
Whether conventional
equipment can be
used
Whether new equipment
can be used with
conventional refrigerant
1 Flare tool Pipe flaring Yes *(Note 1) Yes
2
Copper pipe gauge for
adjusting projection margin
Flaring by conventional
flare tool
Yes *(Note 1) *(Note 1)
3
Torque wrench
(For Ø12.7)
Connection of flare nut Yes No No
4 Gauge manifold
Evacuating, refrigerant
charge, run check, etc.
Yes No No
5 Charge hose
6 Vacuum pump adapter Vacuum evacuating Yes No Yes
7
Electronic balance for
refrigerant charging
Refrigerant charge Yes Yes Yes
8 Refrigerant cylinder Refrigerant charge Yes No No
9 Leakage detector Gas leakage check Yes No Yes
10 Charging cylinder Refrigerant charge *(Note 2) No No
1. Vacuum pump
Use vacuum pump by attaching
vacuum pump adapter.
4. Reamer 9. Hole core drill (Ø65)
5. Pipe bender 10. Hexagon wrench
Opposite side 4mm)6. Level vial
2. Torque wrench (For Ø6.35, Ø9.52) 7. Screwdriver (+, –) 11. Tape measure
3. Pipe cutter 8. Spanner or Monkey wrench 12. Metal saw
1. Clamp meter 3. Insulation resistance tester
2. Thermometer 4. Electroscope
+00A08-010_01EN_SVM_HighWallHeatPump.book Page 17 Wednesday, March 4, 2009 11:22 AM
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