Toshiba RAV-SP1104AT8Z-TR 106, Installation Conditions, Refrigerant Piping, Before installation

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￿Refrigerant Piping

New refrigerant (R410A)

When using the conventional piping kit

•When using the conventional piping kit with no indication of applicable refrigerant types, be sure to use it with a wall

thickness of 0.8 mm for Ø6.4 mm, Ø9.5 mm, and Ø12.7 mm, and with a wall thickness of 1.0 mm for Ø15.9 mm. Do not use the conventional piping kit with a wall thickness less than these thicknesses due to insufficient pressure capacity.

When using general copper pipes

•Use general copper pipes with a wall thickness of 0.8 mm for Ø6.4 mm, Ø9.5 mm, and Ø12.7 mm, and with a wall thickness of 1.0 mm for Ø15.9 mm.

Do not use any copper pipes with a wall thickness less than these thicknesses.

Flare nuts and flare machining

•The flare nuts and flare machining are different from those for the conventional refrigerant. Use the flare nuts supplied with the air conditioner or those for R410A.

•Before performing flare machining, carefully read “REFRIGERANT PIPING”.

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4 INSTALLATION CONDITIONS

￿Before installation

Be sure to prepare to the following items before installation.

Length of refrigerant pipe

Length of refrigerant pipe
connected to indoor/	Item
outdoor unit
3 to 30 m	Addition of refrigerant is
	unnecessary at the local site.
	<Addition of refrigerant>
*31 to 75 m	Add 40 g of refrigerant for
	every 1 m of piping that
	exceeds 30 m.

*Caution during addition of refrigerant

When the total length of refrigerant piping exceeds 30 m, add 40 g/m of refrigerant up to a maximum total length of piping at 75 m. (Max. amount of additional refrigerant is

1,800 g.)

Charge the refrigerant accurately. Overcharging may cause serious trouble with the compressor.

•Do not connect a refrigerant pipe that is shorter than 3 m. This may cause a malfunction of the compressor or other devices.

￿Airtight test

1. Before starting an airtight test, further tighten the spindle valves on the gas and liquid sides.

2. Pressurize the pipe with nitrogen gas charged from the service port to the design pressure (4.15 MPa) to conduct an airtight test.

3. After the airtight test is completed, evacuate the nitrogen gas.

Air purge

•To purge air, use a vacuum pump.

•Do not use refrigerant charged in the outdoor unit to purge air. (The air purge refrigerant is not contained in the outdoor unit.)

Electrical wiring

•Be sure to fix the power wires and indoor/outdoor connecting wires with clamps so that they do not come into contact with the cabinet, etc.

Earthing

•Proper earthing can prevent charging of electricity on the outdoor unit surface due to the presence of a high frequency in the frequency converter (inverter) of the outdoor unit, as well as prevent electric shock. If the outdoor unit is not properly earthed, you may be exposed to an electric shock.

•Be sure to connect the earth wire. (grounding work) Incomplete earthing can cause an electric shock.

Do not connect earth wires to gas pipes, water pipes, lightning rods or earth wires for telephone wires.

Test Run

Turn on the leakage breaker at least 12 hours before starting a test run to protect the compressor during startup.

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