Installation/Service Tools - Toshiba RAS-M18UAV-E Installation Manual

• Do not use any refrigerant different from the one specified for complement or
replacement.
Otherwise, abnormally high pressure may be generated in the refrigerant cycle,
which may result in a failure or explosion of the product or an injury to your body.
• Installation work must be requested from the supplying retail dealership or
professional vendors. Self-installation may cause water leakage, electrical shock, or
fire as a result of improper installation.
• Specified tools and pipe parts for model R410A are required, and installation work
must be done in accordance with the manual. HFC type refrigerant R410A has 1.6
times more pressure than that of conventional refrigerant (R22). Use the specified
pipe parts, and ensure correct installation, otherwise damage and/or injury may be
caused. At the same time, water leakage, electrical shock, and fire may occur.
• Be sure to install the unit in a place which can sufficiently bear its weight. If the load
bearing of the unit is not enough, or installation of the unit is improper, the unit may
fall and result in injury.
• Electrical work must be performed by a qualified electrical engineer in accordance
with the code governing such installation work, internal wiring regulations, and the
manual. A dedicated circuit and the rated voltage must be used. Insufficient power
supply or improper installation may cause electrical shock or fire.
• Use a cabtyre cable to connect wires in the indoor/outdoor units. Midway
connection, stranded wire, and single-wire connections are not allowed. Improper
connection or fixing may cause a fire.
• Wiring between the indoor unit and outdoor units must be well shaped so that the
cover can be firmly placed. Improper cover installation may cause increased heat,
fire, or electrical shock at the terminal area.
• Be sure to use only approved accessories or the specified parts. Failure to do so
may cause the unit to fall, water leakage, fire or electrical shock.
• After the installation work, ensure that there is no leakage of refrigerant gas. If the
refrigerant gas leaks out of the pipe into the room and is heated by fire or something
else from a fan heater, stove or gas range, it causes generation of poisonous gas.
• Make sure the equipment is properly earthed. Do not connect the earth wire to a
gas pipe, water pipe, lightning conductor, or telephone earth wire. Improper earth
work may be the cause of electrical shock.
• Do not install the unit where flammable gas may leak. If there is any gas leakage or
accumulation around the unit, it can cause a fire.
• Do not select a location for installation where there may be excessive water or
humidity, such as a bathroom. Deterioration of insulation may cause electrical
shock or fire.
• Installation work must be performed following the instructions in this installation
manual. Improper installation may cause water leakage, electrical shock or fire.
Check the following items before operating the unit.
- Be sure that the pipe connection is well placed and there are no leaks.
- Check that the service valve is open. If the service valve is closed, it may cause
overpressure and result in compressor damage. At the same time, if there is a
leak in the connection part, it may cause air suction and overpressure, resulting in
burst of the unit or injury.
• In a pump-down operation, be sure to take the following steps.
- Ensure that no air is allowed to enter inside the refrigeration cycle.
- After having closed the two service valves, shut down the compressor, and then
remove the refrigerant pipe.
If removing the refrigerant pipe while the compressor is operating with the service
valve opened, it may cause air suction and overpressure inside the refrigeration
cycle, resulting in burst of the unit or injury.
• Do not modify the power cable, connect the cable midway, or use a multiple outlet
extension cable. Doing so may cause contact failure, insulation failure, or excess
current, resulting in fire or electrical shock.
• If you detect any damage, do not install the unit. Contact your supplying dealer
immediately.
• Never modify this unit by removing any of the safety guards or bypassing any of the
safety interlock switches.
WARNING
• Please read this installation manual carefully before installing the unit. It contains
further important instructions for proper installation.
• Exposure of unit to water or other moisture before installation could result in electric
shock. Do not store it in a wet basement or expose to rain or water.
• After unpacking the unit, examine it carefully for possible damage.
• Do not install in a place that can increase the vibration of the unit. Do not install in a
place that can amplify the noise level of the unit or where noise and discharged air
might disturb neighbors.
• This appliance must be connected to the main power supply by means of a circuit
breaker depending on the place where the unit is installed. Failure to do so may
cause electrical shock.
• Follow the instructions in this installation manual to arrange the drain pipe for proper
drainage from the unit. Ensure that drained water is discharged. Improper drainage
can result in water leakage, causing water damage to furniture.
• Tighten the flare nut with a torque wrench using the prescribed method. Do not
apply excess torque. Otherwise, the nut may crack after a long period of usage and
it may cause the leakage of refrigerant.
• Wear gloves (heavy gloves such as cotton gloves) for installation work. Failure to do
so may cause personal injury when handling parts with sharp edges.
• Do not touch the air intake section or the aluminum fins of the outdoor unit. It may
cause injury.
• Do not install the outdoor unit in a place which can be a nest for small animals.
Small animals could enter and contact internal electrical parts, causing a failure or
fire.
• Request the user to keep the place around the unit tidy and clean.
• Make sure to conduct a trial operation after the installation work, and explain how to
use and maintain the unit to the customer in accordance with the manual. Ask the
customer to keep the operation manual along with the installation manual.
REQUIREMENT OF REPORT TO THE LOCAL POWER SUPPLIER
Please make absolutely sure that the installation of this appliance is reported to the
local power supplier before installation. If you experience any problems or if the
installation is not accepted by the supplier, the service agency will take adequate
countermeasures.

2 INSTALLATION/SERVICE TOOLS

Changes in the product and components
In air conditioners using R410A, in order to prevent any other refrigerant from being
accidentally charged, the service port diameter size of the outdoor unit control valve
(3 way valve) has been changed. (1/2 UNF 20 threads per inch)
• In order to increase the pressure resisting strength of the refrigerant piping, flare
processing diameter and opposing flare nuts sizes have been changed. (For copper
pipes with nominal dimensions 1/2 and 5/8)
Gauge manifold for
Philips screwdriver
R410A
Charge hose for
Level
R410A
Vacuum pump for
Scale
R410A
Gas leakage
Utility knife
detector for R410A
2
CAUTION
Flare tool for
Pipe cutter
R410A
4 mm hexagonal
Torque wrench
wrench
Wrench
(or spanner)
Reamer
EN