Toshiba RAV-SP1104AT8-TR, RAV-SP1104AT8ZG-TR 113, Handling Existing Pipe, Recovering Refrigerant

Super Digital Inverter

8 EARTHING

Super Digital Inverter

13 FUNCTIONS TO BE IMPLEMENTED LOCALLY

– 113 –

Connect the earth line properly following applicable technical standards.

Connecting the earth line is essential to preventing electric shock and to reducing noise and electrical charges on the outdoor unit surface due to the high-frequency wave generated by the frequency converter (inverter) in the outdoor unit.

If you touch the charged outdoor unit without an earth line, you may experience an electric shock.

9 FINISHING

After the refrigerant pipe, inter-unit wires, and drain pipe have been connected, cover them with finishing tape and clamp them to the wall with off-the-shelf support brackets or their equivalent.

Keep the power wires and indoor/outdoor connecting wires off the valve on the gas side or pipes that have no heat insulator.

10 TEST RUN

•Turn on the leakage breaker at least 12 hours before starting a test run to protect the compressor during startup. To protect the compressor, power is supplied from the 380-415 VAC input to the unit to preheat the compressor.

•Check the following before starting a test run:

•That all pipes are connected securely without leaks.

•That the valve is open.

If the compressor is operated with the valve closed, the outdoor unit will become overpressurized, which may damage the compressor or other components.

If there is a leak at a connection, air can be sucked in and the internal pressure further increases, which may cause a burst or injury.

•Operate the air conditioner in the correct procedure as specified in the Owner’s Manual.

11 ANNUAL MAINTENANCE

￿Handling Existing Pipe

When using the existing pipe, carefully check 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 a flare nut to prevent gas leaks.

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 leaks.

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

•The pipe has been opened (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 thicknesses.

Reference outside	Wall thickness (mm)
diameter (mm)
Ø9.5	0.8
Ø15.9	1.0
Ø19.0	1.0

￿Recovering Refrigerant

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

•Before recovering the refrigerant in the existing system, perform a cooling operation for at least 30 minutes.

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 press SW801 for 1 second or more. The air conditioner enters the forced cooling mode for up to 10 minutes.

Operate or handle the valve to recover refrigerant during this time period.

4.Upon completion of refrigerant recovery, close the valve and press SW801 for at least 1 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

•For an air conditioning system that is operated on a regular basis, cleaning and maintenance of the indoor/outdoor units are strongly recommended.

As a general rule, if an indoor unit is operated for about 8 hours daily, the indoor/outdoor units will need to be cleaned at least once every 3 months. This cleaning and maintenance should be carried out by a qualified service person.

Failure to clean the indoor/outdoor units regularly will result in poor performance, icing, water leaking and even compressor failure.

12 AIR CONDITIONER OPERATING CONDITIONS

•Do not use any pipe with a wall thickness less than these thicknesses due to insufficient pressure capacity.

•When using a Ø19.1 mm gas pipe for the existing piping, 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

DANGER

Be careful of electric shock because the P.C. board has an electrical current running through it.

For proper performance, operate the air conditioner under the following temperature conditions:

Cooling operation	Dry bulb temp.	–15°C to 46°C
Heating operation	Wet bulb temp.	–20°C to 15°C

If air conditioner is used outside of the above conditions, safety protection may work.

ON				ON
1	2	3	4	1	2	3	4

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