Installation Conditions - Toshiba RAV-SM1104ATP-E Installation Manual

Refrigerant piping
New refrigerant (R410A)
When using the conventional piping
When using the conventional piping 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 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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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
Addition of refrigerant is
5 to 30 m
unnecessary at the local site.
<Addition of refrigerant>
Add 40 g of refrigerant for
*31 to 50 m
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 50 m. (Max. amount of
additional refrigerant is 800 g.)
Charge the refrigerant accurately. Overcharging
may cause serious trouble with the compressor.
Do not connect a refrigerant pipe that is shorter than
5 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.)
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Electrical wiring
Be sure to fix the power wires and system
interconnection wires with clamps so that they do not
come into contact with the cabinet, etc.
Earthing
WARNING
Make sure that proper earthing is provided.
Improper earthing may cause an electric shock. For
details on how to check earthing, contact the dealer who
installed the air conditioner or a professional installation
company.
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 grounding can cause an electric shock.
Do not connect ground wires to gas pipes, water
pipes, lightning rods or ground 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.
CAUTION
Incorrect installation work may result in a malfunction or
complaints from customers.
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EN
ID
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