Table Of Contents; Before Installation - Mitsubishi MFZ-KA25VA Installation Manual

CoNTENTS
1. BEFORE INSTALLATION ..................................1
2. INDOOR UNIT INSTALLATION .........................3
3. FLARING WORK AND PIPE CONNECTION .....6
4. TEST RUN .........................................................7
5. PUMPING DOWN ..............................................7
1. 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.
n Do not install the unit by yourself (user).
Incomplete installation could cause fire or elec-
tric shock, injury due to the unit falling, or leak-
age of water. Consult the dealer from whom
you purchased the unit or a qualified installer.
n Perform the installation securely referring
to the installation manual.
Incomplete installation could cause fire or
electric shock, injury due to the unit falling, or
leakage of water.
n When installing the unit, use appropriate
protective equipment and tools for safety.
Failure to do so could cause injury.
n 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.
n 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 insuf-
ficient or there is incomplete electrical work, it
could result in a fire or an electric shock.
n Earth the unit correctly.
Do not connect the earth to a gas pipe, water
pipe, lightning rod or telephone earth. Defec-
tive earthing could cause electric shock.
n Do not damage the wires by applying ex-
cessive pressure with parts or screws.
Damaged wires could cause fire or electric
shock.
n 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.
n Use the specified wires to connect the in-
door and outdoor units securely and attach
the wires firmly to the terminal block con-
necting sections so the stress of the wires
is not applied to the sections. Do not extend
the wires, or use intermediate connection.
n I nstall an earth leakage breaker depending
on the installation place.
If an earth leakage breaker is not installed, it
could cause electric shock.
n Perform the drainage/piping work securely
according to the installation manual.
1-2. SElECTING THE INSTAllATIoN loCATIoN
INDooR uNIT
• Where airflow is not blocked.
• Where cool air spreads over the entire room.
• Rigid wall without vibration.
• Where it is not exposed to direct sunshine. Do
not expose to direct sunshine also during the
period following unpacking to before use.
• Where easily drained.
• At a distance 1 m or more away from your TV
and radio. Operation of the air conditioner may
interfere with radio or TV reception. An amplifier
may be required for the affected device.
• In a place as far away as possible from fluores-
cent and incandescent lights (so the infrared
remote control can operate the air conditioner
normally).
• Where the air filter can be removed and re-
placed easily.
En-
This installation
manual describes only
for the indoor unit.
Refer to the MXZ type
manual for outdoor
unit set up.
WARNING
Incomplete connecting and securing could
cause fire.
n 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 explosion.
n 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, exceed-
ing the permissible current, etc.
n Be sure to use the parts provided or speci-
fied 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.
n When plugging the power supply plug into the
outlet, make sure that there is no dust, clog-
ging, 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.
n 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.
n When installing, relocating, or servicing
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 and may
result in explosion 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
CAUTION
If there is defect in the drainage/piping work,
water could drop from the unit, soaking and
damaging household goods.
n Do not touch the air inlet or the aluminum
fins of the outdoor unit.
This could cause injury.
REMoTE CoNTRollER
• Where it is easy to operate and easily visible.
• Where children cannot touch it.
• Select a position about 1.2 m above the floor
and check that signals from the remote control-
ler are surely received by the indoor unit from
that position ('beep' or 'beep beep' receiving
tone sounds). After that, attach remote control-
ler holder to a pillar or wall and install wireless
remote controller.
Note:
In rooms where inverter type fluorescent lamps
are used, the signal from the wireless remote
controller may not be received.
Required Tools for Installation
Phillips screwdriver Wrench (or spanner)
Level 4 mm hexagonal wrench
Scale Flare tool for R410A
Utility knife or scissors Gauge manifold for R410A
25, 35 class 65 mm/50 class Vacuum pump for R410A
75 mm hole saw Charge hose for R410A
Torque wrench Pipe cutter with reamer
(Could lead to death, serious injury, etc.)
to securing product safety.
n Do not discharge the refrigerant into the at-
mosphere. If refrigerant leaks during installa-
tion, ventilate the room.
If refrigerant comes in contact with a fire,
harmful gas could be generated. Refrigerant
leakage may cause suffocation. Provide venti-
lation in accordance with EN378-1.
n Check that the refrigerant gas does not
leak after installation has been completed.
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.
n 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.
n 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 abnor-
mally high. This could cause the pipes to burst
or injury.
n When installing the unit, securely connect
the refrigerant pipes before starting the
compressor.
If the compressor is started before the refriger-
ant pipes are connected and when the stop
valve is open, air could be drawn in and the
pressure in the refrigeration cycle could be-
come abnormally high. This could cause the
pipes to burst or injury.
n 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.
n The unit shall be installed in accordance
with national wiring regulations.
(Could lead to serious injury in particular environments when operated incorrectly.)
n Do not install the outdoor unit where small
animals may live.
If small animals enter and touch the electric
parts inside the unit, it could cause a malfunc-
tion, smoke emission, or fire. Also, advise user
to keep the area around the unit clean.
Note:
Avoid the following places for installation where
air conditioner trouble is liable to occur.
• Where flammable gas could leak.
• Where there is much machine oil.
• Where oil is splashed or where the area is
filled with oily smoke (such as cooking areas
and factories, in which the properties of plas-
tic could be changed and damaged).
• Salty places such as the seaside.
• Where sulfide gas is generated such as a
hot spring.
• Where there is high-frequency or wireless
equipment.
• Where there is emission of high levels of
VOCs, including phthalate compounds, for-
maldehyde, etc., which may cause chemical
cracking.