Mitsubishi Electric MSZ-HR25VF Installation Manual

SPLIT-TYPE AIR CONDITIONERS
INSTALLATION MANUAL
1. BEFORE INSTALLATION
MEANINGS OF SYMBOLS DISPLAYED ON INDOOR UNIT AND/OR OUTDOOR UNIT
WARNING
(Risk of fire)
Read the OPERATING INSTRUCTIONS carefully before operation.
Service personnel are required to carefully read the OPERATING INSTRUCTIONS and INSTALLATION MANUAL before operation.
Further information is available in the OPERATING INSTRUCTIONS, INSTALLATION MANUAL, and the like.
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.
• Before starting the connection setup of the Wi-Fi interface, check the safety precautions in OPERATING INSTRUCTIONS of the room air conditioner. Wi-Fi
trademark of Wi-Fi Alliance .
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• 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.
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Do not install the unit by yourself (user).
Incomplete installation could cause fire, electric shock,
injury due to the unit falling, or leakage of water. Con-
sult the dealer from whom you purchased the unit or a
qualified installer.
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Perform the installation securely referring to the
installation manual.
Incomplete installation could cause fire, electric shock,
injury due to the unit falling, or leakage of water.
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When installing the unit, use appropriate protective
equipment and tools for safety.
Failure to do so could cause injury.
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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.
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Do not alter the unit.
It may cause fire, electric shock, injury or water leakage.
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Electrical work should be performed by a qualified,
experienced electrician, according to the installation
manual. 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.
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Earth the unit correctly.
Do not connect the earth to a gas pipe, water pipe,
lightning rod, or telephone earth. Defective earthing
could cause electric shock.
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Do not damage the wires by applying excessive
pressure with parts or screws.
Damaged wires could cause fire or electric shock.
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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.
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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. Do not
extend the wires, or use intermediate connection.
Incomplete connecting and securing could cause fire.
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Do not install the unit in a place where flammable
gas may leak.
If gas leaks and accumulates in the area around the
unit, it could cause an explosion.
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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 insulation, exceeding the permissible
current, etc.
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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.
REFRIGERANT
Model names are indicated in 1-3.
When installing multi units, refer to the
installation manual of the multi unit for
outdoor unit installation.
This unit uses a flammable refrigerant.
If refrigerant leaks and comes in contact with fire or heating part, it will create harmful gas and there is risk of fire.
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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 com-
pletely 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.
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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.
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When installing, relocating, or servicing the unit,
make sure that no substance other than the speci-
fied refrigerant (R32) enters the refrigerant circuit.
Any presence of foreign substance such as air can
cause abnormal pressure rise and may result in explo-
sion or injury. The use of any refrigerant other than that
specified for the system will cause mechanical failure,
system malfunction, or unit breakdown. In the worst
case, this could lead to a serious impediment to securing
product safety.
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Do not discharge the refrigerant into the atmos-
phere. If refrigerant leaks during installation, ven-
tilate the room. Check that the refrigerant does not
leak after installation has been completed.
If refrigerant leaks and comes in contact with fire or
heating part of such a fan heater, kerosene heater, or
cooking stove, it will create harmful gas. Provide ventila-
tion in accordance with EN378-1.
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Use appropriate tools and piping materials for instal-
lation.
The pressure of R32 is 1.6 times more than R22. Not
using appropriate tools or materials and incomplete
installation could cause the pipes to burst or injury.
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When pumping down the refrigerant, stop the com-
pressor 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.
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When installing the unit, securely connect the re-
frigerant 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.
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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.
JG79N606H01
Phillips screwdriver
Level
Scale
Utility knife or scissors
65 mm hole saw
Torque wrench
Wrench (or spanner)
WARNING
(Could lead to death, serious injury, etc.)
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If the refrigerant leaks and comes in contact in fire or
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For Wi-Fi interface
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It can cause accidents due to malfunctions.
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It can cause an accident due to malfunctions of the
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Required Tools for Installation
4 mm hexagonal wrench
Flare tool for R32, R410A
Gauge manifold for R32, R410A
Vacuum pump for R32, R410A
Charge hose for R32, R410A
Pipe cutter with reamer
The unit shall be installed in accordance with na-
tional wiring regulations.
When using a gas burner or other flame-producing
equipment, completely remove all of the refrigerant
from the air conditioner and ensure that the area is
well-ventilated.
heating part, it will create harmful gas and there is risk
of fire.
Do not use means to accelerate the defrosting pro-
cess or to clean, other than those recommended by
the manufacturer.
The appliance shall be stored in a room without
continuously operating ignition sources (for exam-
ple: open flames, an operating gas appliance or an
operating electric heater).
Do not pierce or burn.
Be aware that refrigerants may not contain an odour.
Pipe-work shall be protected from physical damage.
The installation of pipe-work shall be kept to a
minimum.
Compliance with national gas regulations shall be
observed.
Keep any required ventilation openings clear of
obstruction.
Do not install the indoor unit equipped with the Wi-Fi
interface nearby the automatic control devices such
as automatic doors or fire alarms.
Do not use the indoor unit equipped with the Wi-Fi
interface nearby the medical electrical equipment
or people who have a medical device such as a
cardiac pacemaker or an implantable cardioverter-
defibrillator.
medical equipment or device.
This indoor unit equipped with the Wi-Fi interface
should be installed and operated with a minimum
distance of 20 cm between the device and the user
or bystanders.
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