Mitsubishi Electric MSY-A24NA Installation Manual

SG79Y963H03 Required Tools for Installation
Phillips screwdriver 5/32 in. (4 mm) hexagonal wrench
z MITSUBISHI Level Flare tool for R410A
ol ELECTRIC Model names are indicated in 1-3. Scale . Gauge manifold for R410A
2 When installing multi units, refer to Utility knife or scissors Vacuum pump for R410A
jm SPLIT-TYPE AIR CONDITIONERS the installation manual of the muiti 3 in. (75 mm) hole saw Charge hose for R410A
INSTALLATION MANUAL unit for outdoor unit installation Torque wrench Pipe cutter with reamer
: Wrench (or spanner)
7. BEFORE INSTALLATION
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.
A WARNING _ (Could lead to death, serious injury, etc.)
@ Do not install the unit by yourself (user). @ Attach the electrical cover to the indoor unit and the service panel to the outdoor
Incomplete installation could cause fire or electric shock, injury due to the unit fall- unit securely.
ing, or leakage of water. Consult the dealer from whom you purchased the unit or If the electrical cover of the indoor unit and/or the service panel of the outdoor unit are
a qualified installer. not attached securely, it could result in a fire or an electric shock due to dust, water, etc.
@ Perform the installation securely referring to the installation manual. @ When installing or relocating the unit, make sure that no substance other than
Incomplete installation could cause fire or electric shock, injury due to the unit fall- the specified refrigerant (R410A) enters the refrigerant circuit.
ing, or leakage of water. Any presence of foreign substance such as air can cause abnormal pressure rise
@ Install the unit securely in a place which can bear the weight of the unit. or an explosion.
Hf the installation location cannot bear the weight of the unit, the unit could fall @ Do not discharge the refrigerant into the atmosphere. if refrigerant leaks during
causing injury. installation, ventilate the room.
@ Perform electrical work according to the installation manual and be sure to use Hf refrigerant comes in contact with a fire, harmful gas could be generated.
an exclusive circuit. Do not connect other electrical appliances to the circuit. @ Check that the refrigerant gas does not leak after installation has been com-
lf the capacity of the power circuit is insufficient or there is incomplete electrical pleted.
work, it could result in a fire or an electric shock. lf refrigerant gas leaks indoors, and comes into contact with the flame of a fan
& Ground the unit correctly. heater, space heater, stove, etc., harmful substances will be generated.
Do not connect the ground to a gas pipe, water pipe, lightning rod or telephone @ Use appropriate tools and piping materials for installation.
ground. Defective grounding could cause electric shock. The pressure of R4710A is 1.6 times more than R22. Not using appropriate tools or
@ Do not damage the wires by applying excessive pressure with parts or materials and incomplete installation could cause the pipes to burst or injury.
screws. @ When pumping down the refrigerant, stop the compressor before disconnecting
Damaged wires could cause fire. the refrigerant pipes.
@ Be sure to cut off the main power in case of setting up the indoor P.C. board lf the refrigerant pipes are disconnected while the compressor is running and the
or wiring works. stop valve is open, air could be drawn in and the pressure in the refrigeration cycle
Failure to do so could cause electric shock. could become abnormally high. This could cause the pipes to burst or injury.
& Use the specified wires to connect the indoor and outdoor units securely and & Wheninstalling the unit, securely connect the refrigerant pipes before starting
attach the wires firmly to the terminal block connecting sections so the stress the compressor.
of the wires is not applied to the sections. lf the compressor is started before the refrigerant pipes are connected and when
Incomplete connecting and securing could cause fire. the stop valve is open, air could be drawn in and the pressure in the refrigeration
@ Do not install the unit in a place where inflammable gas may leak. cycle could become abnormally high. This could cause the pipes to burst or injury.
lf gas leaks and accumulates in the area around the unit, it could cause an explo- @ Fasten a flare nut with a torque wrench as specified in this manual.
sion. Hf fastened too tight, a flare nut may break after a long period and cause refrigerant
@ Do not use intermediate connection of the power cord or the extension cord leakage.
and do not connect many devices to one AC outlet. @ The unit shall be installed in accordance with national wiring regulations.
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 ouilet, it could
cause electric shock or fire. Ifloose parts are found on the power supply plug, replace it.
AX CAUTION (Could lead to serious injury in particular environments when operated incorrectly.)
@ Install a Ground Fault Interrupt (GF) circuit breaker depending on the instal- MH Do not touch the air inlet or the aluminum fins of the outdoor unit.
lation place. This could cause injury.
lf the Ground Fault Interrupt (GFI) circuit breaker is not installed, it could cause @ Do not install the outdoor unit where small animals may live.
electric shock. If small animals enter and touch the electric parts inside the unit, it could cause a
@ Perform the drainage/piping work securely according to the installation malfunction, smoke emission, or fire. Also, advise user to keep the area around
manual. the unit clean.
Hf there is defect in the drainage/piping work, water could drop from the unit, soak-
ing and damaging household goods.