Toshiba HWS-802H-E Tools, Necessary tools, General tools Conventional tools are available

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

			R410A Air to Water Hear Pump		Conventionalrefrigerant
					Air to Water Heat Pump
			installation
					installation
No.	Tool to be used	Usage
			For R410A	Conventional	New equipment can be
			Existence of new	equipment can be	used with conventional
			equipment	used	refrigerant
1	Flare tool	Pipe flaring	Yes	*(Note 1)	Yes
2	Copper pipe gauge for	Flaring by conventional	Yes	*(Note 1)	*(Note 1)
	adjusting projection margin	flare tool
3	Torque wrench (For Ø15.9)	Connection of flare nut	Yes	No	No
4	Gauge manifold	Evacuating, refrigerant	Yes	No	No
5	Charge hose	charge, run check, etc.
6	Vacuum pump adapter	Vacuum evacuating	Yes	No	Yes
7	Electrical balance for	Refrigerant charge	Yes	No	Yes
	refrigerant charging
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

*(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

4.	Reamer	9.	Hole core drill (Ø65)
5.	Pipe bender	10. Hexagon wrench
6.	Level vial		(Opposite side 4mm)
7.	Screwdriver (+, –)	11.	Tape measure
8.	Spanner or Monkey wrench	12.	Metal saw

Also prepare the following equipment for other work methods or run check.

1.	Clamp meter	3.	Insulation resistance meter
2.	Thermometer	4.	Electroscope

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