6-3. Tools
6-3-1. Required tools
The service port diameter of packed valve of the outdoor unit in the air conditioner using R410A is changed to prevent mixing of other refrigerant. To reinforce 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 air conditioner | Conventional air | |
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| installation | conditioner installation | |
No. | Used tool | Usage |
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Existence of | Whether | Whether new equipment | |||
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| new equipment | conventional | can be used with |
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| for R410A | equipment can | conventional refrigerant |
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| be used |
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1 | Flare tool | Pipe flaring | Yes | *(Note 1) |
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2 | Copper pipe gauge | Flaring by |
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| for adjusting projection | conventional flare | Yes | *(Note 1) | *(Note 1) |
| margin | tool |
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3 | Torque wrench | Connection of | Yes |
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flare nut |
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4 | Gauge manifold | Evacuating, |
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| refrigerant charge, | Yes |
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5 | Charge hose |
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run check, etc. |
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6 | Vacuum pump adapter | Vacuum evacuating | Yes |
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7 | Electronic balance for | Refrigerant charge | Yes |
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refrigerant charging |
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8 | Refrigerant cylinder | Refrigerant charge | Yes |
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9 | Leakage detector | Gas leakage check | Yes |
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! | Charging cylinder | Refrigerant charge | (Note 2) |
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(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. |
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| Hole core drill (∅65) | |
(1) | Vacuum pump | (4) | Reamer | (9) | |
| Use vacuum pump by | (5) | Pipe bender | (10) | Hexagon wrench |
| attaching vacuum pump adapter. | (6) | Level vial |
| (Opposite side 4 mm) |
(2) | Torque wrench | (7) | Screwdriver (+, | (11) | Tape measure |
(3) | Pipe cutter | (8) | Spanner of Monkey wrench | (12) | Metal saw |
Also prepare the following equipments for other installation method and run check. | |||||
(1) | Clamp meter | (3) | Insulation resistance tester |
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(2) | Thermometer | (4) | Electroscope |
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| – 17 – |
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