Toshiba RAV-SP1604AT8Z-E Danger, Handling of Existing Pipe, Cautions for using existing pipe, 47

6-6-6. Handling of Existing Pipe

When using the existing pipe, carefully check it for the following:

•Wall thickness (within the specified range)

•Scratches and dents

•Water, oil, dirt, or dust in the pipe

•Flare looseness and leakage from welds

•Deterioration of copper pipe and heat insulator

Cautions for using existing pipe

•Do not reuse the flare to prevent gas leak.

Replace it with the supplied flare nut and then process it to a flare.

•Blow nitrogen gas or use an appropriate means to keep the inside of the pipe clean.

If discolored oil or much residue is discharged, wash the pipe.

•Check welds, if any, on the pipe for gas leak.

When the pipe corresponds to any of the following, do not use it. Install a new pipe instead.

•The pipe has been open (disconnected from indoor unit or outdoor unit) for a long period.

•The pipe has been connected to an outdoor unit that does not use refrigerant R22, R410A or R407C.

•The existing pipe must have a wall thickness equal to or larger than the following thickness.

Reference outside diameter	Wall thickness
(mm)	(mm)
Ø9.5	0.8
Ø15.9	1.0
Ø19.1	1.0

•Never use any pipe with a wall thickness less than these thicknesses due to insufficient pressure capacity.

•To use an existing Ø19.1 mm pipe, set bit 3 of SW802 (switch for existing pipe) on the P.C. board of the outdoor unit to ON.

In this case, the heating performance may be reduced depending on the outside air temperature and room temperature.

SW802

When shipped from factory		When using existing pipe
	ON		ON

1 2 3 4 1 2 3 4

6-6-7. Recovery Method of Refrigerant

•Use the refrigerant recovery switch SW801 on the P.C. board of the outdoor unit to recover refrigerant when the indoor unit or outdoor unit is moved.

Procedure

1.Turn on the power of the air conditioner.

2.Select the FAN mode for indoor unit operation with the remote controller.

3.Set SW804 on the P.C. board of the outdoor unit to all OFF, and then push SW801 for one second or more.

The air conditioner enters the forced cooling mode for up to 10 minutes.

Operation or handling the valve to recover refrigerant during this time period.

4.Upon completion of refrigerant recovery, close the valve and push SW801 for at least one second to stop operation.

5.Turn off the power.

ON						ON
1		2	3	4		1		2	3	4
	SW804						SW805
ON						ON
1		2	3	4	1			2	3	4
	SW802						SW803				SW800 SW801 SW806

Existing pipe	Refrigerant
switch SW802	recovery switch
	SW801

DANGER

Take care for an electric shock because the P.C. board is electrified.

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