2-3.Tools; 2-3-1.Necessary Tools - Toshiba HWS-P805XWHM3-E Service Manual

2-3. Tools
2-3-1. Necessary tools
In Air to Water Heat Pump using R410A, the service port diameter of packed valve of the outdoor unit is changed
to prevent mixing of other refrigerant. To reinforce the pressure resistance, flare dimensions and opposite side
dimensions of flare nut (For Ø 12.7 copper pipe) of the refrigerant piping are lengthened.
Because the refrigerating machine oil is changed, mixing of oil may generate sludge, clog capillary, or cause other
problems. Accordingly, the tools to be used include:
• tools dedicated for R410A (Those that cannot be used for the conventional refrigerant, R22)
• tools dedicated for R410A, but can be also used for the conventional refrigerant, R22
• tools that can be used for the conventional refrigerant, R22.
The following table shows the tools dedicated for R410A and their interchangeability.
Tools dedicated for R410A (The following tools must be for R410A)
Tools whose specifications are changed for R410A and their interchangeability
No. Tool to be used
1 Flare tool
Copper pipe gauge for
2
adjusting projection margin
3 Torque wrench (For Ø15.9)
4 Gauge manifold
5 Charge hose
6 Vacuum pump adapter
Electrical balance for
7
refrigerant charging
8 Refrigerant cylinder
9 Leakage detector
10 Charging cylinder
* (Note 1) Flaring for R410A by using the conventional flare tool requires projection margin adjustment. This
adjustment requires copper pipe gauge or other instrument.
* (Note 2) A charging cylinder for R410A is currently under development.
General tools (Conventional tools are available)
In addition to the above dedicated tools, the following equipment also available for R22 is necessary as the general
tools.
1. Vacuum pump
Use this by attaching vacuum pump
adapter.
2. Torque wrench (For Ø6.35)
3. Pipe cutter
Also prepare the following equipment for other work methods or 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 meter
4. Electroscope
10
R410A Air to Water Hear Pump
installation
For R410A Conventional
Existence of new equipment can be
equipment used
Yes *(Note 1)
Yes *(Note 1)
Yes
Yes
Yes
Yes
Yes
Yes
*(Note 2)
9. Hole core drill (Ø65)
10. Hexagon wrench
11. Tape measure
12. Metal saw
Conventional refrigerant
Air to Water Heat Pump
installation
New equipment can be
used with conventional
refrigerant
Yes
*(Note 1)
No No
No No
No Yes
No Yes
No No
No Yes
No No
(Opposite side 4 mm)