Toshiba RAV-SM1603AT-A, Installation Manual

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INSTALLATION CONDITIONS

„

Before installation

Be sure to prepare to the following items before 
installation.

Length of refrigerant pipe

* 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.) 

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 

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. 

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. 

Length of refrigerant 

pipe connected to 

indoor/outdoor unit

Item

5 to 30 m

Addition of refrigerant is 
unnecessary at the local 
site.

*31 to 50 m

<Addition of refrigerant>
Add 40 g of refrigerant for 
every 1 m of piping that 
exceeds 30 m. 

„

Installation Location

WARNING

Install the outdoor unit properly in a location that is 
durable enough to support the weight of the outdoor 
unit. 

Insufficient durability may cause the outdoor unit to fall, 
which may result in injury. 

CAUTION

Do not install the outdoor unit in a location that is 
subject to combustible gas leaks. 

Accumulation of combustible gas around the outdoor unit 
may cause a fire. 

Install the outdoor unit in a location that meets the 
following conditions after the customer’s consent is 
obtained. 

• A well-ventilated location free from obstacles near the 

air inlets and air outlet 

• A location that is not exposed to rain or direct sunlight 
• A location that does not increase the operating noise 

or vibration of the outdoor unit 

• A location that does not produce any drainage 

problems from discharged water 

Do not install the outdoor unit in the following 
locations. 

• A location with a saline atmosphere (coastal area) or 

one that is full of sulfide gas (hot-spring area) (Special 
maintenance is required.) 

• A location subject to oil, vapor, oily smoke, or 

corrosive gases

• Places where iron or other metal dust is present. If iron 

or other metal dust adheres to or collects on the 
interior of the air conditioner, it may spontaneously 
combust and start a fire.

• A location in which organic solvent is used 

• A location where high-frequency equipment (including 

inverter equipment, private power generator, medical 
equipment, and communication equipment) is used 
(Installation in such a location may cause malfunction 
of the air conditioner, abnormal control or problems 
due to noise from such equipment.) 

• A location in which the discharged air of the outdoor 

unit blows against the window of a neighboring house 

• A location where the operating noise of the outdoor 

unit is transmitted 

• When the outdoor unit is installed in an elevated 

position, be sure to secure its feet. 

• A location in which drain water poses any problems. 

CAUTION

1.

Install the outdoor unit in a location where the 
discharge air is not blocked. 

2.

When an outdoor unit is installed in a location that is 
always exposed to strong winds like a coast or on 
the high stories of a building, secure normal fan 
operation by using a duct or wind shield. 

3.

When installing the outdoor unit in a location that is 
constantly exposed to strong winds such as on the 
upper stairs or rooftop of a building, apply the 
windproofing measures referred to in the following 
examples. 
1)

Install the unit so that its discharge port faces 
the wall of the building.
Keep a distance 500 mm or more between the 
unit and wall surface. 

500 mm

EN-7

EN-8