Mitsubishi Electric MSZ-LN25VG Installation Manual

SPLIT-TYPE AIR CONDITIONERS

INSTALLATION MANUAL

1. BEFORE INSTALLATION

MEANINGS OF SYMBOLS DISPLAYED ON INDOOR UNIT AND/OR OUTDOOR UNIT
WARNING
Read the P RAT G
Service personnel are required to carefully read the
Further information is availa le in the
1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY
e sure to read T F LL W G S
efore starting the connection setup of the Wi Fi interface, check the safety precautions in
e sure to o serve the warnings and cautions speci ed here as they include important items related to safety
After reading this manual, e sure to keep it together with the
■ Do not install the unit by yourself (user).
ncomplete installation could cause re, electric shock,
in ury due to the unit falling, or leakage of water Consult
the dealer from whom you purchased the unit or a quali ed
installer
■ Perform the installation securely referring to the
installation manual.
ncomplete installation could cause re, electric shock,
in ury due to the unit falling, or leakage of water
■ When installing the unit, use appropriate protective
equipment and tools for safety.
Failure to do so could cause in ury
■ Install the unit securely in a place which can bear the
weight of the unit.
f the installation location cannot ear the weight of the
unit, the unit could fall causing in ury
■ Electrical wor should be performed by a quali ed,
experienced electrician, according to the installation
manual. Be sure to use an exclusive circuit. Do not
connect other electrical appliances to the circuit.
f the capacity of the power circuit is insuf cient or there
is incomplete electrical work, it could result in a re or an
electric shock
■ Earth the unit correctly.
o not connect the earth to a gas pipe, water pipe, light
ning rod, or telephone earth
cause electric shock
■ Do not damage the wires by applying excessive pres-
sure with parts or screws.
amaged wires could cause re or electric shock
■ 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 speci ed wires to connect the indoor and
outdoor units securely and attach the wires rmly 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.
ncomplete connecting and securing could cause re
■ Do not install the unit in a place where ammable gas
may leak.
If gas leaks and accumulates in the area around the unit,
it could cause an explosion
■ 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 re or an electric shock due to defective
contact, defective insulation, exceeding the permissi le
current, etc
■ Be sure to use the parts provided or speci ed parts
for the installation work.
The use of defective parts could cause an injury or leakage
of water due to a re, an electric shock, the unit falling,
etc
REFRIGERANT
Model names are indicated in 1-3.
This unit uses a amma le refrigerant
f refrigerant leaks and comes in contact with re or heating part, it will create harmful gas and there is risk of re
STRUCT S carefully efore operation
P RAT G
P RAT G STRUCT
UL ALWA S S RV
P RAT G
■ 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 sup
ply plug or the outlet, it could cause electric shock or re
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 re or an electric shock due to dust, water, etc
■ When installing, relocating, or servicing the unit,
make sure that no substance other than the speci ed
refrigerant (R32) enters the refrigerant circuit.
Any presence of foreign su stance such as air can cause
a normal pressure rise and may result in explosion or
injury The use of any refrigerant other than that speci
ed for the system will cause mechanical failure, system
malfunction, or unit reakdown In the worst case, this
could lead to a serious impediment to securing product
safety
■ Do not discharge the refrigerant into the atmosphere.
efective earthing could If refrigerant leaks during installation, ventilate the
room. Check that the refrigerant does not leak after
installation has been completed.
If refrigerant leaks and comes in contact with re or heat
ing part of such a fan heater, kerosene heater, or cooking
stove, it will create harmful gas Provide ventilation in
accordance with
■ Use appropriate tools and piping materials for instal-
lation.
The pressure of R32 is 1 6 times more than R22
appropriate tools or materials and incomplete installation
could cause the pipes to urst or injury
■ When pumping down the refrigerant, stop the com-
pressor before disconnecting the refrigerant pipes.
If the refrigerant pipes are disconnected while the com
pressor is running and the stop valve is open, air could e
drawn in and the pressure in the refrigeration cycle could
ecome a normally high This could cause the pipes to
urst or injury
■ When installing the unit, securely connect the refriger-
ant pipes before starting the compressor.
If the compressor is started efore the refrigerant pipes are
connected and when the stop valve is open, air could e
drawn in and the pressure in the refrigeration cycle could
ecome a normally high This could cause the pipes to
urst or injury
JG79 480 01
STRUCT S and STALLAT
S, STALLAT A UAL, and the like
F R SAF T efore installing the air conditioner
P RAT G STRUCT
STRUCT S for future reference
WARNING
(Could lead to death, serious in ury, etc )
3 1
Required Tools for Installation
Phillips screwdriver
Level
Scale
Utility knife or scissors
65 mm hole saw
Torque wrench
Wrench (or spanner)
Appropriate personal protective equipment
The installer should ensure they check the respective Work
and Safety (W S) Act within their jurisdiction as the requirements and
o ligations may differ
A UAL efore operation
S of the room air conditioner
■ Fasten a are nut with a torque wrench as speci ed
in this manual.
If fastened too tight, a are nut may reak after a long
period and cause refrigerant leakage
■ The unit shall be installed in accordance with national
wiring regulations.
■ When using a gas burner or other ame-producing
equipment, completely remove all of the refrigerant
from the air conditioner and ensure that the area is
well-ventilated.
If the refrigerant leaks and comes in contact in re or
heating part, it will create harmful gas and there is risk of
re
■ Do not use means to accelerate the defrosting process
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 ames, 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 mini-
mum.
■ Compliance with national gas regulations shall be
observed.
■ Keep any required ventilation openings clear of ob-
struction.
■ Do not install the indoor unit equipped with the Wi-Fi
interface nearby the automatic control devices such
as automatic doors or re alarms.
ot using It can cause accidents due to malfunctions
■ 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-de brilla-
tor.
It can cause an accident due to malfunctions of the 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.
■ In Australia, only technicians that possess the appro-
priate license issued by the Australian Refrigeration
Council (ARC) should install this product.
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
ealth