FILE NO.
3-3. Tools
3-3-1. Required Tools
The service port diameter of packed valve of the outdoor unit in the
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 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
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| R410A | Conventional | ||
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| heat pump installation | |||
No. | Used tool | Usage |
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Existence of | Whether conven- | Whether new equipment | ||||
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| new equipment | tional equipment | can be used with | |
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| for R410A | can be used | conventional refrigerant | |
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1 | Flare tool | Pipe flaring | Yes | *(Note 1) | ° | |
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| Copper pipe gauge for | Flaring by |
| *(Note 1) | *(Note 1) | |
2 | adjusting projection | Yes | ||||
conventional flare tool | ||||||
| margin |
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3 | Torque wrench | Connection of flare nut | Yes | × | × | |
(For Ø12.7) | ||||||
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4 | Gauge manifold | Evacuating, refrigerant | Yes | × | × | |
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5 | Charge hose | charge, run check, etc. | ||||
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6 | Vacuum pump adapter | Vacuum evacuating | Yes | × | ° | |
7 | Electronic balance for | Refrigerant charge | Yes | × | ° | |
refrigerant charging | ||||||
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8 | Refrigerant cylinder | Refrigerant charge | Yes | × | × | |
9 | Leakage detector | Gas leakage check | Yes | × | ° | |
10 | Charging cylinder | Refrigerant charge | (Note 2) | × | × |
(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 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
4. | Reamer | 9. | Hole core drill (Ø65) |
5. | Pipe bender | 10. | Hexagon wrench |
6. | Level vial |
| (Opposite side 4mm) |
7. | Screwdriver (+, | 11. | Tape measure |
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8. | Spanner or Monkey wrench | 12. | Metal saw |
Also prepare the following equipments for other installation method and run check.
1. | Clamp meter | 3. | Insulation resistance tester |
2. | Thermometer | 4. | Electroscope |
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