Precautions For Safety - Toshiba MMD-AP0481HF2UL Installation Manual

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Precautions for safety

Installing, starting up, and servicing air--conditioning equipment can be hazardous due to system pressures,
electrical components, and equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should install, start--up, and service this equipment.
Untrained personnel can perform basic maintenance functions such as cleaning indoor unit air filter. All other
operations should be performed by trained service personnel.
Before working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached
to the equipment.
Follow all safety codes. Wear safety glasses and work gloves. Use care in handling, rigging, and setting bulky
equipment.
Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the
unit. Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety
information. This is the safety--alert symbol
manuals, be alert to the potential for personal injury. Understand these signal words: DANGER, WARNING, and
CAUTION. These words are used with the safety--alert symbol.
DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING
signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which
may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which
will result in enhanced installation, reliability, or operation.
The manufacturer shall not assume any liability for the damage caused by not observing the description of this
manual.
WARNING
• Only a qualified installer or service person is allowed to do installation work.
Inappropriate installation may result in water leakage, electric shock or fire.
• Do not use any refrigerant different from the one specified for complement or replacement.
Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a
failure or explosion of the product or an injury to your body.
• Connect ground wire. (grounding work)
Incomplete grounding may cause an electric shock.
Do not connect ground wires to gas pipes, water pipes, lightning rods or ground wires for telephone wires.
• Turn off all the circuit breaker before attempting any electrical work.
Failure to do so may cause electric shock.
• Install the refrigerant pipe securely during the installation work before operating the air conditioner.
If the air conditioner is operated with the valve open and without the refrigerant pipe, the compressor sucks air and
the refrigeration cycle is overpressurized, which may cause a burst or injury.
• When moving the air conditioner for the installation into another place, do not enter any gaseous matter
other than the specified refrigerant into the refrigeration cycle.
If air or any other gas is mixed in the refrigerant, the gas pressure in the refrigeration cycle becomes abnormally high
and it resultingly causes pipe burst and injuries on persons.
• Perform installation work properly according to the Installation Manual.
Inappropriate installation may result in water leakage, electric shock or fire.
• When the air conditioner is installed in a small room, provide appropriate measures to ensure that the
concentration of refrigerant leakage occur in the room does not exceed the critical level.
• Perform the specified installation work to guard against an earthquake.
If the air conditioner is not installed appropriately, accidents may occur due to the falling unit.
• Install the air conditioner at a height 8' (2.4 m) or more from the floor.
If you insert your hands or others directly into the unit while the air conditioner operates, it is dangerous because you
may contact with revolving fan or active electricity.
• If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fire, noxious gas may generate.
• After the installation work, confirm that refrigerant gas does not leak.
If refrigerant gas leaks into the room and flows near a fire source, such as a cooking range, noxious gas might
generate.
• Electrical work must be performed by a qualified electrician in accordance with the Installation Manual. Use
an exclusive power supply for the air conditioner at the rated voltage.
An insufficient power supply capacity or inappropriate installation may cause fire.
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. When you see this symbol on the unit and in instructions or
• Use the specified wires for wiring connect the terminals. Securely fix them to prevent external forces applied
to the terminals from affecting the terminals.
• Conform to the regulations of the local electric company when wiring the power supply.
• For the refrigerant recovery work (collection of refrigerant from the pipe to the compressor), stop the
compressor before disconnecting the refrigerant pipe.
If the refrigerant pipe is disconnected while the compressor is working with the valve open, the compressor sucks air
and the refrigeration cycle is overpressurized, which may cause a burst or injury.
• Before carrying out the installation, maintenance, repair or removal work, set the circuit breaker to the OFF
position.
Otherwise, electric shocks may result.
• Do not touch the aluminium fin of the unit. You may injure yourself if you do so. If the fin must be touched
for some reason, first put on protective gloves and safety work clothing, and then proceed.
• Install the air conditioner securely in a location where the base can sustain the weight adequately. If the
strength is not enough, the unit may fall down resulting in injury.
• The unit can be accessed from the service panel.
• Install a circuit breaker that meets the specifications in the installation manual and the stipulations in the
local regulations and laws.
• Install the circuit breaker where it can be easily accessed by the agent.
• Under no circumstances the power wire must not be extended. Connection trouble in the places where the
wire is extended may give rise to smoking and/or a fire.
• Upon completion of the installation work, tell the user where the circuit breaker is located. If the user does
not know where the circuit breaker is, he or she will not be able to turn it off in the event that trouble has
occurred in the air conditioner.
CAUTION
• This air conditioner adopts the new HFC refrigerant (R410A) which does not destroy ozone layer.
• The characteristics of R410A refrigerant are; easy to absorb water, oxidizing membrane or oil, and its pressure is
approx. 1.6 times higher than that of refrigerant R22. Accompanied with the new refrigerant, refrigerating oil has also
been changed. Therefore, during installation work, be sure that water, dust, former refrigerant, or refrigerating oil does
not enter the refrigerating cycle.
• To prevent charging an incorrect refrigerant and refrigerating oil, the sizes of connecting sections of charging port of
the main unit and installation tools are changed from those for the conventional refrigerant.
• Accordingly the exclusive tools are required for the new refrigerant (R410A).
• For connecting pipes, use new and clean piping designed for R410A, and please care so that water or dust does not
enter.
• Tighten the flare nut with a torque wrench in the specified manner.
Excessive tightening of the flare nut may cause a crack in the flare nut after a long period, which may result in
refrigerant leakage.
• Wear heavy gloves during the installation work to avoid injury.
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