Mitsubishi Electric MSY-A24NA Installation Manual

Am& MITSUBISHI
ELECTRIC
SPLIT=TYPE AIR CONDITIONERS
INSTALLATION MANUAL
SG79Y963H03
Model names are indicated in 1-3.
When installing multi units, refer to
the installation manual of the multi
unit for outdoor unit installation.
li Required Tools for Installation "]
hillips screwdriver 5/32 in. (4 ram) hexagonal wrench I
evel Flare tool for R410A |
cale Gauge manifold for R410A |
tility knife or scissors Vacuum pump for R410A |
in. (75 mm) hole saw Charge hose for R410A |
rque wrench Pipe cutter with reamer |
rench (or spanner)
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1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY
• Be sure to read "THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY" before installing the air conditioner.
• Be sure to observe the warnings and cautions specified here as they include important items related to safety.
• After reading this manual, be sure to keep it together with the OPERATING INSTRUCTIONS for future reference.
Please report to your supply authority or obtain their consent before connecting this equipment to the power supply system.
[] Do not install the unit by yourself (user).
Incomplete installation could cause fire or electric shock, injury due to the unit fall-
ing, or leakage of water. Consult the dealer from whom you purchased the unit or
a qualified installer.
[] Perform the installation securely referring to the installation manual.
Incomplete installation could cause fire or electric shock, injury due to the unit fall-
ing, or leakage of water.
[] Install the unit securely in a place which can bear the weight of the unit.
If the installation location cannot bear the weight of the unit, the unit could fall
causing injury.
[] Perform electrical work according to the installation manual and be sure to use
an exclusive circuit. Do not connect other electrical appliances to the circuit.
If the capacity of the power circuit is insufficient or there is incomplete electrical
work, it could result in a fire or an electric shock.
[] Ground the unit correctly.
Do not conned the ground to a gas pipe, water pipe, lightning rod or telephone
ground. Defective grounding could cause electric shock.
[] Do not damage the wires by applying excessive pressure with parts or
SCreWS.
Damaged wires could cause fire.
[] Be sure to cut off the main power in case of setting up the indoor P.C. board
or wiring works.
Failure to do so could cause electric shock.
[] Use the specified wires to connect the indoor and outdoor units securely and
attach the wires firmly to the terminal block connecting sections so the stress
of the wires is not applied to the sections.
Incomplete connecting and securing could cause fire.
[] Do not install the unit in a place where inflammable gas may leak.
If gas leaks and accumulates in the area around the unit, it could cause an explo-
sion.
[] Do not use intermediate connection of the power cord or the extension cord
and do not connect many devices to one AC outlet.
It could cause a fire or an electric shock due to defective contact, defective insula-
tion, exceeding the permissible current, etc.
[] Be sure to use the parts provided or specified parts for the installation work.
The use of defective parts could cause an injury or leakage of water due to a fire, an
electric shock, the unit falling, etc.
[] When plugging the power supply plug into the outlet, make sure that there is
no dust, clogging, or loose parts in both the outlet and the plug. Make sure
that the power supply plug is pushed completely into the outlet.
If there is dust, clogging, or loose parts on the power supply plug or the outlet, it could
cause electric shock or fire. If loose parts are found on the power supply plug, replace it.
[] Attach the electrical cover to the indoor unit and the service panel to the outdoor
unit securely.
If the electrical cover of the indoor unit and/or the service panel of the outdoor unit are
not attached securely, it could result in a fire or an electric shock due to dust, water, etc.
[] When installing or relocating the unit, make sure that no substance other than
the specified refrigerant (R410A) enters the refrigerant circuit.
Any presence of foreign substance such as air can cause abnormal pressure rise
or an explosion.
[] Do not discharge the refrigerant into the atmosphere. If refrigerant leaks during
installation, ventilate the room.
If refrigerant comes in contact with a fire, harmful gas could be generated.
[] Check that the refrigerant gas does not leak after installation has been com-
pleted.
If refrigerant gas leaks indoors, and comes into contact with the flame of a fan
heater, space heater, stove, etc., harmful substances will be generated.
[] Use appropriate tools and piping materials for installation.
The pressure of R410A is 1.6 times more than R22. Not using appropriate tools or
materials and incomplete installation could cause the pipes to burst or injury.
[] When pumping down the refrigerant, stop the compressor before disconnecting
the refrigerant pipes.
If the refrigerant pipes are disconnected while the compressor is running and the
stop valve is open, air could be drawn in and the pressure in the refrigeration cycle
could become abnormally high. This could cause the pipes to burst or injury.
[] When installing the unit, securely connect the refrigerant pipes before starting
the compressor.
If the compressor is started before the refrigerant pipes are connected and when
the stop valve is open, air could be drawn in and the pressure in the refrigeration
cycle could become abnormally high. This could cause the pipes to burst or injury.
[] Fasten a flare nut with a torque wrench as specified in this manual.
If fastened too tight, a flare nut may break after a long period and cause refrigerant
leakage.
[] The unit shall be installed in accordance with national wiring regulations.
[] Install a Ground Fault Interrupt (GFI) circuit breaker depending on the instal-
lation place.
If the Ground Fault Interrupt (GFI) circuit breaker is not installed, it could cause
electric shock.
[] Perform the drainage/piping work securely according to the installation
manual.
If there is defect in the drainage/piping work, water could drop from the unit, soak-
ing and damaging household goods.
[] Do not touch the air inlet or the aluminum fins of the outdoor unit.
This could cause injury.
[] Do not instamlthe outdoor unit where smaml animals may live.
If small animals enter and touch the electric parts inside the unit, it could cause a
malfunction, smoke emission, or fire. Also, advise user to keep the area around
the unit clean.