Mitsubishi Electric MSZ-AP15VGD User manual

SPLIT-TYPE AIR CONDITIONERS
MSZ-AP15VGD MSZ-AP20VGD
English
INSTALLATION MANUAL For INSTALLER
• This manual only describes the installation of indoor unit.
When installing the outdoor unit, refer to the installation manual of outdoor unit.
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EN-1
FOR INSTALLER
ENGLISH
When installing multi units,
refer to the installation
manual of the multi unit for
outdoor unit installation.
CONTENTS
1. BEFORE INSTALLATION..................................1
2. INDOOR UNIT INSTALLATION .........................4
3. OUTDOOR UNIT INSTALLATION .....................5
4. PURGING PROCEDURES, LEAK TEST, AND
TEST RUN.........................................................6
5. RELOCATION AND MAINTENANCE ................7Appropriate personal protective equipment
The installer should ensure they check the respective Work Health
and Safety (WHS) Act within their jurisdiction as the requirements and
obligations may di󰀨er.
Required Tools for Installation
Phillips screwdriver
Level
Scale
Utility knife or scissors
65 mm hole saw
Torque wrench
Wrench (or spanner)
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
1. BEFORE INSTALLATION
MEANINGS OF SYMBOLS DISPLAYED ON INDOOR UNIT AND/OR OUTDOOR UNIT
WARNING
(Risk of re)
This unit uses a ammable refrigerant.
If refrigerant leaks and comes in contact with re or heating part, it will create harmful gas and there is risk of re.
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.
• Be sure to observe the warnings and cautions specied 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.
• When using this product in Australia, carefully read the Australian Institute of Refrigeration and Flammable refrigerants Safety Guide in Air conditioning and Heating (AIRAH) as well.
WARNING (Could lead to death, serious injury, etc.)
nDo not install the unit by yourself (user).
Incomplete installation could cause re, electric
shock, injury due to the unit falling, or leakage of
water.Consultthe dealer fromwhomyoupurchased
the unit or a qualied installer.
nPerform the installation securely referring to the
installation manual.
Incomplete installation could cause re, electric
shock, injury due to the unit falling, or leakage of
water.
nWhen installing the unit, use appropriate protec-
tive equipment and tools for safety.
Failure to do so could cause injury.
nInstall 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.
nDo not alter the unit.
It may cause re, electric shock, injury or water
leakage.
n Electrical work 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 appli-
ances to the circuit.
If the capacity of the power circuit is insu󰀩cient or
there is incomplete electrical work, it could result in
a re or an electric shock.
nEarth the unit correctly.
Do not connect the earth to a gas pipe, water pipe,
lightningrod,ortelephoneearth.Defective earthing
could cause electric shock.
n Do not damage the wires by applying excessive
pressure with parts or screws.
Damaged wires could cause re or electric shock.
n Be sure to cut o󰀨 the main power in case of set-
ting up the indoor P.C. board or wiring works.
Failure to do so could cause electric shock.
n 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 inter-
mediate connection.
Incomplete connecting and securing could cause
re.
n Do not install the unit in a place where ammable
gas may leak.
Ifgasleaksandaccumulates in the area aroundthe
unit, it could cause an explosion.
nDo not useintermediate 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 permissible current, etc.
n 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.
n 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.
Ifthereisdust, clogging, or loosepartsonthe power
supply plug or the outlet, it could cause electric
shock or re. 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 re or an electric shock
due to dust, water, etc.
n When installing, relocating, or servicing theunit,
make sure that no substance other than the
specied refrigerant (R32) 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 specied 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.
n Do not discharge the refrigerant into the atmos-
phere. If refrigerant leaks during installation,
ventilate the room. Check that the refrigerant
does not leak after installation has been com-
pleted.
If refrigerant leaks and comes in contact with re or
heating part of such a fan heater, kerosene heater,
or cooking stove, it will create harmful gas.
n Use appropriate tools and piping materials for
installation.
Thepressureof R32 is1.6times more thanR22.Not
usingappropriatetoolsormaterialsandincomplete
installation could cause the pipes to burst or injury.
n When pumping down the refrigerant, stop the
compressor before disconnecting the refriger-
ant 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 refrig-
eration cycle could become abnormally high. This
could cause the pipes to burst or injury.
n When installing the unit, securely connect the
refrigerant pipes before starting the compres-
sor.
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.
n Fasten a are nut with a torque wrench as speci-
ed in this manual.
If fastened too tight, a are nut may break after a
long period and cause refrigerant leakage.
n The unit shall be installed in accordance with
national wiring regulations.
n When using a gas burner or other ame-pro-
ducing 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.
n Do not use means to accelerate the defrosting
process or to clean, other than those recom-
mended by the manufacturer.
n The appliance shall be stored in a room without
continuously operating ignition sources (for
example: open ames, an operating gas appli-
ance or an operating electric heater).
n Do not pierce or burn.
n Be aware that refrigerants may not contain an
odour.
n Pipe-work shall be protectedfromphysical dam-
age.
n The installation of pipe-work shall be kept to a
minimum.
n Compliance with national gas regulations shall
be observed.
n Keep any required ventilation openings clear of
obstruction.
n In Australia, only technicians that possess the
appropriate license issued by the Australian
Refrigeration Council (ARC) should install this
product.
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EN-2
1-2. SELECTING THE INSTALLATION LOCATION
INDOOR UNIT
• Where airow is not blocked.
• Wherecool(orwarm)airspreadsover theentireroom.
• Rigid wall without vibration.
• Where it is not exposed to direct sunshine. Do not
expose to direct sunshine also during the period fol-
lowing unpacking to before use.
• Where easily drained.
• At a distance 1 m or more away from your TV and ra-
dio.Operationof the airconditionermayinterfere with
radio or TV reception. An amplier may be required
for the a󰀨ected device.
• In a place as far away as possible from uorescent
and incandescent lights.
In order to make the infrared remote control operate
the air conditioner normally.
The heat from the lights may cause deformation or
the ultraviolet may cause deterioration.
• Where the air lter can be removed and replaced
easily.
• Whereitisaway from theotherheator steamsource.
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 oor and
check that signals from the remote controller are
surely received by the indoor unit from that position
(‘beep’ or ‘beep beep’ receiving tone sounds).
Note:
In rooms where inverter type uorescent lamps are
used, the signal from the wireless remote controller
may not be received.
OUTDOOR UNIT
• Where it is not exposed to strong wind. If the outdoor
unitisexposedtoa windduringdefrosting, thedefrost-
ing time will be longer.
• Where airow is good and dustless.
• Where rain or direct sunlightcan be avoided as much
as possible.
• Where neighbours are not annoyed by operation
sound or hot (or cool) air.
• Where rigid wall or support is available to prevent the
increase of operation sound or vibration.
• Where there is no risk of combustible gas leakage.
• When installing the unit at a high level, be sure to
secure the unit legs.
• Where it is at least 3 m away from the antenna of
TV set or radio. Operation of the air conditioner may
interfere with radio or TV reception in areas where
reception is weak. An amplier may be required for
the a󰀨ected device.
• Install the unit horizontally.
• Please install it in an area not a󰀨ected by snowfall or
blowingsnow.Inareaswith heavysnow,please install
a canopy, a pedestal and/or some ba󰀪e boards.
Note:
It is advisable to make a piping loop near outdoor unit
so as to reduce vibration transmitted from there.
Note:
When operating the air conditioner in low outside
temperature, be sure to follow the instructions de-
scribed below.
• Never install the outdoor unit in a place where
its air inlet/outlet side may be exposed directly to
wind.
• To prevent exposure to wind, install the outdoor
unit with its air inlet side facing the wall.
• To prevent exposure to wind, it is recommended
to install a ba󰀪e board on the air outlet side of the
outdoor unit.
Avoid the following places for installation where air
conditioner trouble is liable to occur.
• Where ammable gas could leak.
• Where there is much machine oil.
• Where oil is splashed or where the area is lled
with oily smoke (such as cooking areas and fac-
tories, in which the properties of plastic could be
changed and damaged).
• Salty places such as the seaside.
• Where sulde gas is generated such as hot spring,
sewage, waste water.
• Where there is high-frequency or wireless equip-
ment.
• Where there is emission of high levels of VOCs,
including phthalate compounds, formaldehyde,
etc., which may cause chemical cracking.
• The appliance shall be stored so as to prevent
mechanical damage from occurring.
1-3. SPECIFICATIONS
Model Power supply *1 Wire specications Pipe size
(thickness *4, *5) Maximum amount
of refrigerant
charge *8
Indoor unit Outdoor unit Rated
Voltage Frequency Breaker capacity Power supply *2 Indoor/outdoor connecting wire *2 Gas / Liquid
MSZ-AP15VGD -230 V 50/60 Hz - - 4-core
1.0 mm² ø9.52 / 6.35 mm (0.8 mm)
-
MSZ-AP20VGD MUZ-AP20VG 50 Hz 10 A 3-core
1.0 mm² 810 g
(AP20)
Pipe length and height di󰀨erence
Max. pipe length 20 m
Max. height di󰀨erence 12 m
Max. number of bends *6, *7 10
Refrigerant adjustment A *8 20 g/m
Insulation thickness *9, *10 8 mm
*1 Connect to the power switch which has a gap of 3 mm or more when open to interrupt the source power phase.
(When the power switch is shut o󰀨, it must interrupt all phases.)
*2 Use wires in conformity with design 60245 IEC 57.
*3 Use wires in conformity with design AS/NZS 5000.2.
*4 Never use pipes with thickness less than specied. The pressure resistance will be insu󰀩cient.
*5 Use a copper pipe or a copper-alloy seamless pipe.
*6 Be careful not to crush or bend the pipe during pipe bending.
*7 Refrigerant pipe bending radius must be 100 mm or more.
*8 If pipe length exceeds 7 m, additional refrigerant (R32) charge is required. (No additional charge is required for pipe
length less than 7 m.)
Additional refrigerant = A × (pipe length (m) – 7)
*9 Insulation material : Heat resisting foam plastic 0.045 specic gravity
*10 Be sure to use the insulation of specied thickness. Excessive thickness may cause incorrect installation of the
indoor unit and insu󰀩cient thickness may cause dew drippage.
CAUTION
(Could lead to serious injury in particular environments when operated incorrectly.)
nInstall an earth leakage breaker depending on
the installation place.
If an earth leakage breaker is not installed, it could
cause electric shock.
nPerform 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, soaking and damaging
household goods.
n Do not touch the air inlet or the aluminum ns
of the outdoor unit.
This could cause injury.
nDo 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 malfunction, smoke
emission, or re. Also, advise user to keep the area
around the unit clean.
n Do not operate the air conditioner during inte-
rior construction and nishing work, or while
waxing the oor.
Before operating the air conditioner, ventilate the
roomwellafter such workisperformed.Otherwise, it
maycausevolatileelements to adhere insidetheair
conditioner,resultinginwaterleakageorscattering
of dew.
WARNING
The unit should be installed in rooms which have
the oor space specied below.
AP20VG: 1.4 m² or larger
When the indoor unit is connected to the multi
type outdoor unit of R32 refrigerant, please con-
sult your dealer about the oor space specied.
As for the details, please refer to the Installation
Service Manual for New Refrigerant System.
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EN-3
(G)
(E)
(C)
(4)
(D)
(F)
(5)
(3) (6)
(7)
(2)
(1)
(B)
(K)
(A)
(I)
ACCESSORIES
Check the following parts before installation.
<Indoor unit>
(1) Installation plate 1
(2) Installation plate xing screw 4 × 25 mm 5
(3) Wireless remote controller 1
(4) Felt tape (For left or left-rear piping) 1
(5) Battery (AAA) for (3) 2
(6) Remote controller holder 1
(7) Fixing screw for (5) 3.5 × 16 mm (Black) 2
<Outdoor unit>
(8) Drain socket 1
PARTS TO BE PROVIDED AT YOUR SITE
(A) Indoor/outdoor unit connecting wire*1 1
(B) Extension pipe 1
(C) Wall hole sleeve 1
(D) Wall hole cover 1
(E) Pipe xing band 2 to 5
(F) Fixing screw for (E) 4 × 20 mm 2 to 5
(G) Piping tape 1
(H) Putty 1
(I) Drain hose (or soft PVC hose, 15 mm inner diameter or hard PVC pipe
VP16) 1 or 2
(J) Refrigeration oil 1
(K) Power supply cord*1 1
108 mm
or more
81 mm
or more
66 mm or more/
142 mm or more
for left/left rear piping
(using spacer)
17 mm
or more
1-4. INSTALLATION DIAGRAM
1.8 m or more from the oor.
Up to 2.3 m is recommended.
Outdoor unit installation
Air inlet
Air outlet
40 mm
2-10 mm × 21 mm slot
800 mm
150 mm
500 mm
344.5 mm
285 mm
304-325 mm
Air inlet
clear *2
100 mm
or more
100 mm
or more
200 mm *3
or more
*2 100 mm or more when front
and sides of unit are clear
350 mm
or more
Appearance of the outdoor unit may di󰀨er from some models.
*3 When any 2 sides of left, right and rear of unit are clear
(8) (I)
Note:
Install the unit horizontally.
Do not use drain socket (8) in cold regions. Drain may freeze and make the
fan stop.
The outdoor unit produces condensate during the heating operation. Select
the installation place to ensure to prevent the outdoor unit and/or the grounds
from being wet by drain water or damaged by frozen drain water.
Drain piping for outdoor unit
• Provide drain piping before indoor and outdoor pip-
ing connection.
• Connect drain hose (I) I.D.15 mm as shown in the
illustration.
• Make sure to provide drain piping with a downhill
grade for easy drain ow.
Note:
*1 Place indoor/outdoor unit connecting wire (A) and power supply cord (K) at
least 1 m away from the TV antenna wire.
IMPORTANT NOTES
• Units should be installed by licensed contractor according to local code
requirements.
• To comply with the requirements ofAustralian standard AS/NZS 3000
electrical installations (wiring rules), the electrical wiring required between
the indoor and outdoor units must be installed by a licenced electrical
contractor.
• Check that cabling will not be subject to wear, corrosion, excessive pres-
sure, vibration, sharp edges or any other adverse environmental e󰀨ects.
The check shall also take into account the e󰀨ects of aging or continual
vibration from sources such as compressors or fans.
WARNING
To avoid risk of re, are connection should be installed outdoors.
Reusable mechanical connectors and ared joints are not allowed
indoors.
Whenthepiping istobe attachedtoa wallcontainingmetals(tin plated)ormetal
netting, use a chemically treated wooden piece 20 mm or thicker between the
wallandthe pipingorwrap7 to8turnsof insulationvinyltapearound thepiping.
To use existing piping, perform COOL operation for 30 minutes and pump
down before removing the old air conditioner. Remake are according to the
dimension for new refrigerant.
After the leak test, apply insulating material tightly
so that there is no gap.
WARNING
To avoid risk of re, embed or protect the refrigerant piping.
External damage on the refrigerant piping can be cause of re.
Be sure to use wall hole sleeve (C)
topreventindoor/outdoorconnect-
ing wire (A) from contacting metal
parts in the wall and to prevent
damage by rodents in case the
wall is hollow.
Indoor unit
Wall hole
sleeve (C)
Cut o󰀨 the
extra length. Pipe xing band (E)
Wall hole cover (D)
Fixing screw (F)
Seal the wall hole
gap with putty (H).
Fix the pipe to wall
with pipe xing band
(E).
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EN-4
Left or left-rear piping
Note:
Be sure to reattach the drain hose and the drain cap in case of left or left-
rear piping.
Otherwise, it could cause drops of water to drip down from the drain hose.
1) Put the refrigerant piping and the drain hose together, then rmly apply felt
tape (4) fromthe end.
Felt tape (4) overlap
width should be 1/3
the tape width. Use
a bandage stopper
at the end of felt tape
(4).
2) Pulloutthedraincap
attherearright of the
indoor unit. (Fig. 1)
• Hold the convex section at the end and pull
the drain cap.
3) Pull out the drain hose at the rear left of the
indoor unit. (Fig. 2)
• Hold the claw marked by the arrows and
pull out the drain hose forward.
4) Put the drain cap into the section to which the
drain hose is to be attached at the rear of the
indoor unit. (Fig. 3)
• Insert not sharp-edged tools such as screw-
drivers into the hole at the end of the cap
and insert the cap fully into the drain pan.
5) Insert the drain hose fully into the drain pan at
the rear right of the indoor unit. (Fig. 4)
• Check if the hose is hooked securely to the
projection of its inserting part at the drain
pan.
6) Insert the drain hose into wall hole sleeve (C),
and hook the upper part of indoor unit on instal-
lation plate (1). Then, move the indoor unit
completely to the left in order to make placing
the piping in the back space of the unit easier.
7) Cut out a piece of cardboard from the shipping
box, roll it up, hook it onto the back rib, and use
it as a spacer to lift the indoor unit. (Fig. 5)
8) Connecttherefrigerantpiping with the extension
pipe (B).
9) Thrust the lower part of the indoor unit into the
installation plate (1).
Drain cap
Drain cap
Drain hose
Cut o󰀨 in case of left
piping.
Drain cap
Piping tape (G)
Drain hose
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Felt tape (4)
2-1. FIXING OF INSTALLATION PLATE
• Find a structural material (such as a stud) in the wall and x installation plate
(1) horizontally by tightening the xing screws (2) rmly.
• To prevent installation plate (1) from vibrating, be sure to install the xing screws
in the holes indicated in the illustration. For added support, xing screws may
also be installed in other holes.
• When the knockout is removed, apply vinyl tape to the knockout edges to
prevent damaging the wires.
• When bolts recessed in the concrete wall are to be utilized, secure installation
plate (1) using 11 × 20 · 11 × 26 oval hole (450 mm pitch).
• If the recessed bolt is too long, change it for a shorter one available in the
market.
2-2. WALL HOLE DRILLING
1) Determine the wall hole position.
2) Drillaø65mm hole.Theoutdoorside should
be 5 to 7 mm lower than the indoor side.
3) Insert wall hole sleeve (C).
Indoor terminal block
Indoor/outdoor unit
connecting wire (A)
Outdoor terminal block
Earth wire (green/yellow)
• For future servicing, give extra length to the connecting wires.
• Make earth wire a little longer than others. (More than 60 mm)
• Do not fold the excess wire, or cram it into small space. Take caution not
to damage the wires.
• Be sure to attach each screw to its correspondent terminal when securing
the cord and/or the wire to the terminal block.
Note: Do not place the wires between the indoor unit and the installation
plate (1). Damaged wire could cause heat generation or re.
Wall
Outdoor side
ø65 mm 5-7 mm
Terminal block
Fixing screw
Indoor/outdoor unit
connecting wire (A)
VA clamp
Lead wire
15 mm
35 mm
Installation plate (1)
Center of
ø65 mm hole
108 mm
or more
81 mm
or more
66 mm or more/
142 mm or more for left/left
rear piping (using spacer)
Ceiling
Wall Wall
Fixing screw (2)
* Same for left hole.
Insert
the
scale. *
Align the
scale with
the line. *
100 mm
Level Do not make drain piping as shown below.
Do not
raise Accumulated drain water
Air
Waving
Water
leakage
Water
leakage Water leakage
Tip of drain
hose dipped
in water
Ditch
At least 50 mm
gap
Down-
ward
slope
Drain hose
Soft hose
I.D. 15 mm
Drain hose
Hard vinyl chloride
pipe I.D. 30 mm
Insert
securely
Di󰀨erent
diameter joint
70 cm
or more
Fig. 1 Fig. 2 Fig. 3
2-4. PIPE FORMING AND DRAIN PIPING
Pipe Forming
• Placethedrain hose belowtherefrigerant piping.
• Make sure that the drain hose is not heaved or
snaked.
• Do not pull the hose when applying the tape.
• When the drain hose passes the room, be sure
towrapinsulationmaterial (obtainable atastore)
around it.
Drain Piping
• If the extension drain hose has to pass through a room, be sure to wrap it with
commercially sold insulation.
• The drain hose should point downward for easy drain ow. (Fig. 1)
• If the drain hose provided with the indoor unit is too short, connect it with drain
hose (I) that should be provided at your site. (Fig. 2)
• When connecting the drain hose to the hard vinyl chloride pipe, be sure to
insert it securely into the pipe. (Fig. 3)
Rear, right, or downward piping
1) Puttherefrigerantpipingandthe drain
hose together, then rmly apply piping
tape (G) from the end.
2) Insert the piping and the drain hose
into the wall hole sleeve (C), and hook
the upper part of the indoor unit on the
installation plate (1).
3) Check if the indoor unit is hooked securely on the installation plate (1) by
moving the unit to left and right.
4) Thrust the lower part of the indoor unit into the installation plate (1).
Cut o󰀨 in case of
right piping.
Cut o󰀨 in case of
downward piping.
2-3. CONNECTING WIRES FOR INDOOR UNIT
You can connect indoor/outdoor lead wire without removing the front panel.
1) Open the front panel.
2) Remove VA clamp.
3) Pass indoor/outdoor unit connecting wire (A) from the back of the indoor unit
and process the end of the wire.
4) Loosen terminal screw, and connect rst the earth wire, then indoor/outdoor
unit connecting wire (A) to the terminal block. Be careful not to make mis-
wiring. Fix the wire to the terminal block securely so that no part of its core is
appeared, and no external force is conveyed to the connecting section of the
terminal block.
5) Firmly tighten the terminal screws to prevent them from loosening. After
tightening, pull the wires lightly to conrm that they do not move.
6) Secure indoor/outdoor unit connecting wire (A) and the earth wire with the VA
clamp. Never fail to hook the left claw of the VA clamp. Attach the VA clamp
securely.
Liquid pipe
Gas pipe
Indoor/outdoor unit
connecting wire (A)
Felt tape (4)
Piping tape (G)
2. INDOOR UNIT INSTALLATION
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EN-5
3. OUTDOOR UNIT INSTALLATION
3-1. CONNECTING WIRES FOR OUTDOOR UNIT
1) Open the service panel.
2) Loosen terminal screw, and connect indoor/outdoor unit connecting wire (A)
from the indoor unit correctly on the terminal block. Be careful not to make
mis-wiring.Fixthewiretotheterminalblocksecurely so that no part of its core
is appeared, and no external force is conveyed to the connecting section of
the terminal block.
3) Firmly tighten the terminal screws to prevent them from loosening. After
tightening, pull the wires lightly to conrm that they do not move.
4) Connect power supply cord (K).
5)
Fix indoor/outdoor unit connecting wire (A) and power supply cord (K) with the cord
clamp.
6) Close the service panel securely.
35 mm 15 mm
Lead wire
Power supply cord (K)
3-2. FLARING WORK
1) Cutthecopperpipecorrectly with pipecutter.
(Fig. 1, 2)
2) Completely remove all burrs from the cut
cross section of pipe. (Fig. 3)
• Put the end of the copper pipe to
downward direction as you remove burrs
in order to avoid to let burrs drop in the
piping.
3) Remove are nuts attached to indoor and
outdoor units, then put them on pipe having
completedburrremoval.(Notpossibletoput
them on after aring work.)
4) Flaring work (Fig. 4, 5). Firmly hold copper
pipe in the dimension shown in the table.
Select A mm from the table according to the
tool you use.
5) Check
• Compare the ared work with Fig. 6.
• If are is noted to be defective, cut o󰀨 the ared section and do aring
work again.
Copper
pipe
Good
Tilted Uneven Burred
No good
Fig. 1
Fig. 2
Burr Copper pipe
Spare reamer
Pipe cutter
Clutch type
Flaring tool
Fig. 4
Fig. 3 Wing nut type
Smooth all
around
Even length
all around
Inside is shining with-
out any scratches.
Fig. 6
Flare nut
Die
Fig. 5
Copper pipe
Pipe diameter
(mm) Nut (mm)
A (mm) Tightening torque
Clutch
type
tool
for
R410A
Clutch
type
tool
for R22
Wing
nut type
tool
for R22
N•m kgf•cm
ø 6.35 (1/4”) 17
0 to 0.5 1.0 to
1.5
1.5 to
2.0 13.7 to 17.7 140 to 180
ø 9.52 (3/8”) 22 34.3 to 41.2 350 to 420
ø12.7 (1/2”) 26 2.0 to
2.5 49.0 to 56.4 500 to 575
ø15.88 (5/8”) 29 73.5 to 78.4 750 to 800
3-3. PIPE CONNECTION
• Fasten are nut with a torque wrench as specied in the table.
• When fastened too tight, are nut may break after a long period and cause
refrigerant leakage.
• Be sure to wrap insulation around the piping. Direct contact with the bare
piping may result in burns or frostbite.
Indoor unit connection
Connect both liquid and gas pipings to indoor unit.
• Apply a thin coat of refrigeration oil (J) on the ared ends of the pipes. Do not
applyrefrigerationoilonscrewthreads.Excessivetighteningtorquewillresult
in damage on the screw.
• For connection, rst align the center, then tighten the rst 3 to 4 turns of are
nut, by hand.
• Use tightening torque table above as a guideline for indoor unit side union
joint section, and tighten using two wrenches. Excessive tightening damages
the are section.
WARNING
When installing the unit, securely connect the
refrigerant pipes before starting the compressor.
3-4. INSULATION AND TAPING
1) Cover piping joints with pipe cover.
2) For outdoor unit side, surely insulate every piping including valves.
3) Using piping tape (G), apply taping starting from the entry of outdoor unit.
• Stop the end of piping tape (G) with tape (with adhesive agent at-
tached).
• When piping have to be arranged through above ceiling, closet or where
the temperature and humidity are high, wind additional commercially
sold insulation to prevent condensation.
• Make earth wire a little longer than others. (More than 100 mm)
• For future servicing, give extra length to the connecting wires.
• Be sure to attach each screw to its correspondent terminal when securing
the cord and/or the wire to the terminal block.
Terminal block
Cord clamp
Power supply cord (K)
Indoor/outdoor unit
connecting wire (A)
Cord clamp
Always x the power supply
cord on this clamp.
WARNING
To avoid risk of re, are connection should be installed outdoors.
Reusable mechanical connectors and ared joints are not allowed
indoors.
When connecting the refrigerant piping by brazing, rather than using
are connections, complete all brazing prior to connecting indoor unit
to outdoor unit.
Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit in the same manner
applied for indoor unit.
• For tightening, use a torque wrench or spanner and use the same tightening
torque applied for indoor unit.
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EN-6
4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN
CN105
CN104
3-5. CONNECTING THE INTERFACE/CONNECTOR CABLE TO THE AIR CONDITIONER
• Connect the INTERFACE/CONNECTOR CABLE to the Indoor electronic control P.C. board of the air conditioner with the connecting cable.
• Cutting or extending the connecting cable of the INTERFACE/CONNECTOR CABLE results in defects in connecting.
Do not bundle the connecting cable together with power supply cord, Indoor/outdoor connecting wire, and/or earth wire.
Keep as much distance as possible between the connecting cable and those wires.
• The thin part of the connecting cable should be stored and placed where customers cannot touch it.
1) Remove the panel and the lower right corner box.
2) Open the covers of the Indoor electronic control P.C. board.
3) Connect the connecting cable to CN105 and/or CN104 on the Indoor elec-
tronic control P.C. board.
Pass the thin part of the connecting cable through the rib as shown in the
gure.
4) Attach the cable clamp provided with Interface to the thick part of the con-
necting cable with a screw 4×16 as shown in the gure.
5) Pass the connecting cable through the rib as shown in the gure.
6) Close the covers of the Indoor electronic control P.C. board.
Be careful not to catch the thin part of the connecting cable in the cover.
Reinstall the panel and the lower right corner box.
WARNING
Fix the connecting cable at the prescribed position securely.
Incorrect installation may cause electric shock, re, and/or malfunction.
4-1. PURGING PROCEDURES AND LEAK TEST
1) Remove service port cap of stop valve on the side of the outdoor unit gas pipe. (The stop
valves are fully closed and covered in caps in initial state.)
2) Connect gauge manifold valve and vacuum pump to service port of stop valve on the gas
pipe side of the outdoor unit.
Stop valve for
GAS
Stop valve cap
(Torque 19.6 to
29.4 N•m, 200
to 300 kgf•cm)
Vacuum pump (or the vacuum
pump with the function to
prevent the back ow)
Gauge manifold valve
(for R32, R410A)
Compound pressure gauge
(for R32, R410A)
–0.101 MPa
(–760 mmHg)
Handle
Low Handle High
Adapter for
preventing the
back ow
Charge hose
(for R32, R410A)
*Close
*Open
Hexagonal wrench
Precautions when using the control valve When attaching the control valve
to the service port, valve core may
deform or loosen if excess pressure
is applied. This may cause gas leak.
Service port
Body
Close
<R32>
Open
Control
valve
A
When attaching the control valve to
the service port, make sure that the
valve core is in closed position, and
then tighten part A. Do not tighten
part A or turn the body when valve
core is in open position.
Service port cap
(Torque 13.7 to
17.7 N•m, 140 to
180 kgf•cm)
*4 to 5 turns
3) Runthevacuumpump.(Vacuumizeuntil 500 microns is achieved.)
4) Check the vacuum with gauge manifold valve, then close gauge
manifold valve, and stop the vacuum pump.
5) Leave as it is for one or two minutes. Make sure pointer gauge
manifold valve remains in the same position. Conrm that pressure
gauge shows –0.101 MPa [Gauge] (–760 mmHg).
6) Remove gauge manifold valve quickly from service port of stop
valve.
Stop valve
for LIQUID
Pressure gauge
(for R32, R410A)
Charge
hose
Make sure to re-
place the cap after
the operation.
WARNING
To avoid risk of re, make sure that there are no ammable
hazards or ignition risks before opening the stop valves.
7) After refrigerant pipes are connected and evacuated, fully open
all stop valves on both sides of gas pipe and liquid pipe. Operat-
ing without fully opening lowers the performance and this causes
trouble.
8) Refer to 1-3., and charge the prescribed amount of refrigerant if
needed.Besuretochargeslowly with liquid refrigerant. Otherwise,
composition of the refrigerant in the system may be changed and
a󰀨ect performance of the air conditioner.
9) Tighten cap of service port to obtain the initial status.
10) Leak test
Connecting
In case of simultaneous connection of CN104 and CN105.
Air conditioner
Thin part of the connecting cable.
Place this part where customers cannot touch it.
Thick part of the
connecting cable
Indoor electronic
control P.C. board CN105 for INTERFACE CN104 for CONNECTOR CABLE
Bundle CN105 and CN104
cables with cable tie.
Clamp to CN105 and x it
with a screw.
CN105
CN104
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EN-7
4-2. TEST RUN
1) Insert power supply plug into the power outlet
and/or turn on the breaker.
2) Press the E.O. SW once for COOL, and twice
for HEAT operation. Test run will be performed
for 30 minutes. If the left lamp of the operation
indicator blinks every 0.5 seconds, inspect the
indoor/outdoor unit connecting wire (A) for mis-
wiring. After the test run, emergency mode (set
temperature 24ºC) will start.
3) To stop operation, press the E.O. SW several
times until all LED lamps turn o󰀨. Refer to operat-
ing instructions for details.
Checking the remote (infrared) signal reception
Press the OFF/ON button on the remote controller (3) and check that an
electronic sound is heard from the indoor unit. Press the OFF/ON button again
to turn the air conditioner o󰀨.
• Once the compressor stops, the restart preventive device operates so the
compressor will not operate for 3 minutes to protect the air conditioner.
4-4. EXPLANATION TO THE USER
• Using the OPERATING INSTRUCTIONS, explain to the user how to use the
air conditioner (how to use the remote controller, how to remove the air lters,
how to remove or put the remote controller in the remote controller holder,
how to clean, precautions for operation, etc.).
• Recommend the user to read the OPERATING INSTRUCTIONS carefully.
5-1. REMOVING AND INSTALLING THE PANEL
ASSEMBLY 5-3. PUMPING DOWN
When relocating or disposing of the air conditioner, pump down the system
following the procedure below so that no refrigerant is released into the
atmosphere.
1) Connect the gauge manifold valve to the service port of the stop valve on the
gas pipe side of the outdoor unit.
2) Fully close the stop valve on the liquid pipe side of the outdoor unit.
3) Closethestopvalveonthe gas pipe side oftheoutdoorunitalmostcompletely
so that it can be easily closed fully when the pressure gauge shows 0 MPa
[Gauge] (0 kgf/cm2).
4) Start the emergency COOL operation.
To start the emergency operation in COOL mode, disconnect the power
supply plug and/or turn o󰀨 the breaker. After 15 seconds, connect the power
supply plug and/or turn on the breaker, and then press the E.O. SW once.
(The emergency COOL operation can be performed continuously for up to 30
minutes.)
5) Fully close the stop valve on the gas pipe side of the outdoor unit when the
pressure gauge shows 0.05 to 0 MPa [Gauge] (approx. 0.5 to 0 kgf/cm2).
6) Stop the emergency COOL operation.
Press the E.O. SW several times until all LED lamps turn o󰀨. Refer to operating
instructions for details.
5-2. REMOVING THE INDOOR UNIT
Remove the bottom of the indoor unit from the
installation plate.
When releasing the corner part, release both left
and right bottom corner part of indoor unit and pull
it downward and forward as shown in the gure on
the right.
Removal procedure
1) Remove the 2 screws which x the panel
assembly.
2) Remove the panel assembly. Be sure to
remove its bottom end rst.
Installation procedure
1) Install the panel assembly following the re-
moval procedure in reverse.
2) Be sure to press the positions as indicated
by the arrows in order to attach the assembly
completely to the unit.
Caution:
• After test run or remote signal reception check, turn o󰀨 the unit with the E.O.
SW or the remote controller before turning o󰀨 the power supply. Not doing
so will cause the unit to start operation automatically when power supply is
resumed.
To the user
• After installing the unit, make sure to explain the user about auto restart
function.
• If auto restart function is unnecessary, it can be deactivated. Consult the
servicerepresentativetodeactivate the function.Refertothe service manual
for details.
Note:
When power (circuit breaker) is turned on, the horizontal vanes automatically
move to the normal position.
When pumping down the refrigerant, stop the compressor before
disconnecting the refrigerant pipes. The compressor may burst if air
etc. get into it.
WARNING
4-3. AUTO RESTART FUNCTION
This product is equipped with an auto restart function. When the power
supply is stopped during operation, such as during blackouts, the function
automatically starts operation in the previous setting once the power supply is
resumed. (Refer to the operating instructions for details.)
5. RELOCATION AND MAINTENANCE
Emergency operation
switch (E.O. SW)
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VG79J830H01
HEADOFFICE:TOKYOBUILDING,2-7-3,MARUNOUCHI,CHIYODA-KU,TOKYO100-8310,JAPAN
This product is designed and intended for use in the residential, commercial and
light-industrial environment.
VG79J830H01_Cover.indd 2 2020/02/20 13:53:25