Toshiba Super Modular Unit MMU-AP0091H Installation Manual page 15

4. Tools
• Required tools for R-410A
Mixing of different types of oil may cause generation of sludge, clogging of capillary, etc. Accordingly, the tools
to be used are classified into the following three types:
1) Tools exclusively for R-410A, which cannot be used for conventional refrigerant R-22.
2) Tools exclusively for R-410A, but can also be used for conventional refrigerant R-22.
3) Tools commonly used for R-410A and for conventional refrigerant R-22.
The table below shows the tools exclusively for R-410A and their interchangeability.
Tools exclusively for R-410A (the following tools for R-410A are required)
Tools whose specifications are changed for R-410A and their interchangeability
No. Used tool
1 Flare tool
2 Copper pipe gauge for
adjusting projection margin
3 Torque wrench
4 Gauge manifold
5 Charge hose
6 Vacuum pump adapter
7 Electronic balance for
refrigerant charging
8 Refrigerant cylinder
9 Leakage detector
10 Charging cylinder
Note 1: When flaring is carried out for R-410A 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 R-410A is currently being developed.
General tools (conventional tools can be used)
In addition to the above exclusive tools, the following equipment which serves also for R-22 is 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
Also prepare the following equipment for other installation method and run check.
1. Clamp meter
2. Thermometer
3. Insulation resistance tester (Megger)
4. Volt meter
Usage R-410A air conditioner installation
Existence of new
equipment for R-410A
Pipe flaring Yes
Flaring by conventional Yes
flare tool
Connection of flare nut Yes
Evacuating, refrigerant Yes
charge, run check, etc.
Vacuum evacuating Yes
Refrigerant charge Yes
Refrigerant charge Yes
Gas leakage check Yes
Refrigerant charge See Note 2
Whether conventional
equipment can be used
See Note 1
See Note 1
No
No
No
Yes
No
No
No
6. Level vial
7. Screwdriver (+, -)
8. Spanner or monkey wrench
9. Hole core drill
10. Hexagon wrench (opposite side 4 mm)
11. Tape measure
12. Metal saw
15
Conventional air
conditioner installation
Whether new equipment
can be used with
conventional refrigerant
Yes
See Note 1
No
No
Yes
Yes
No
Yes
No