REVIEWED BLD BLD2021-1289+Manufacturer_Specifications_and_Installation_Instructions+9.17.2021_8.24.20_AM+2414781JG79YO36H01
MSZ-GL06/09/12/15NA
AkMITSUBISHI
ELECTRIC
MSY-GL09/12/15NA
When installing multi units, refer to the
SPLIT -TYPE AIR CONDITIONERS
installation manual of the multi unit for
INSTALLATION MANUAL
outdoor unit installation.
1. BEFORE INSTALLATION
Required Tools for Installation
Phillips screwdriver
5/32 in. (4 mm) hexagonal
Level
wrench
Scale
Flare tool for R410A
Utility knife or scissors
Gauge manifold for R410A
3 in. (75 mm) hole saw
Vacuum pump for R410A
Torque wrench
Charge hose for R410A
Wrench (or spanner)
Pipe cutter with reamer
1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY
• Be sure to read these safety precautions and instructions.
• Be sure to observe the warnings and cautions specified here.
• After reading this manual, be sure to store it 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.
■ Do not install the unit by yourself (user).
Improper or incomplete installation could cause fire, electric shock, injury due to
the unit falling, or water leakage. Consult a qualified installer or the dealer from
whom you purchased the unit.
■ Follow the instructions detailed in the installation manual.
Incomplete installation could cause fire or electric shock, injury due to the unit fall-
ing, or leakage of water.
IN When installing the unit, use appropriate protective equipment and tools for
safety.
Failure to do so could cause injury.
■ Install the unit securely in a place that can bear the weight of the unit.
If the installation location cannot bear the weight of the unit, the unit could fall
causing injury.
IN Perform electrical work according to the installation manual and 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.
■ Ground the unit correctly.
Do not connect the ground wire to a gas pipe, water pipe, lightning rod or tel-
ephone ground. Defective grounding could cause electric shock.
IN Do not damage the wires.
Damaged wires could cause fire.
■ Be sure to shut off the main power when setting up the indoor P.C. board or
wiring.
Failure to do so could cause electric shock.
IN Use the specified wires to securely connect the indoor and outdoor units. At-
tach the wires firmly to avoid applying stress to the terminal block.
Improper connection could cause fire.
IN Do not install the unit in a place where flammable gas may leak.
If gas leaks and accumulates around the unit, it could cause an explosion.
IN Do not use intermediate connection of the power cord or the extension cord.
Do not connect many devices to one AC outlet.
It could cause a fire or an electric shock.
■ 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, blockage, or loose parts both in the outlet and on the plug. Verify that
the power supply plug is completely in the outlet.
If there is dust, blockage, 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.
IN Depending on the installation area, install a Ground Fault Interrupt (GFI) circuit
breaker.
If the Ground Fault Interrupt (GFI) circuit breaker is not installed, an electric shock
could occur.
■ Perform the drainage/piping work securely according to the installation manual.
If there is defect in the drainage/piping work, water could drip from the unit, and
damage household items.
REVIEWED
BY
CITY OF EDMONDS
■ Securely attach the electrical cover to the indoor unit and the service panel to
the outdoor unit.
If the electrical cover of the indoor unit and/or the service panel of the outdoor unit are
not attached securely, dust, water, etc. could collect in the unit and could cause a fire or
an electric shock.
■ 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 to securing
product safety.
■ Do not discharge the refrigerant into the atmosphere. Check that the refriger-
ant gas does not leak after installation has been completed. If refrigerant leaks
during installation, ventilate the room.
If refrigerant comes in contact with a fire, harmful gas could be generated.
If refrigerant gas leaks indoors, and comes into contact with the flame of a fan
heater, space heater, stove, etc., harmful gases will be generated.
■ Use appropriate tools and piping materials for installation.
The pressure of R410A is 1.6 times higher than R22. Not using the appropriate
tools and materials, or improper installation could cause the pipes to burst causing
an injury.
■ 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 abnormally high, causing the pipes to burst.
■ When installing the unit, securely connect the refrigerant pipes before starting
the compressor.
If the compressor is started before the refrigerant pipes are connected and the
stop valve is open, air could be drawn in and the pressure in the refrigeration cycle
could become abnormally high, causing the pipes to burst.
■ Fasten a flare nut with a torque wrench as specified in this manual.
If fastened too tight, a flare nut could break and cause refrigerant leakage.
■ Install the unit according to national wiring regulations.
■ Do not touch the air inlet or the aluminum fins of the outdoor unit.
This could cause injury.
■ Do not install the outdoor unit where small animals may live.
If small animals enter the unit and damage its electrical parts, it could cause a
malfunction, smoke emission, or fire. Keep the area around the unit clean.
RECEIVED
Oct 01 2021
CITY OF EDMONDS
DEVELOPMENT SERVICES
DEPARTMENT
BLD2021-1289
1-2. SELECTING THE INSTALLATION LOCATION
• Where airflow is not blocked.
• Where cool (or warm) air spreads over the entire room.
• On a rigid wall to reduce the possibility of vibration.
• Where it is not exposed to direct sunlight. Do not expose
to direct sunlight also during the period following unpack-
ing to before use.
• Where it can be easily drained.
• At a distance 3 ft. (1 m) or more away from a 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 fluorescent and
incandescent lights (so the infrared remote control can
operate the air conditioner normally).
• Where the air filter can be removed and replaced easily.
• Where it is away from the other heat or steam source.
Note:
Install the indoor unit high on the wall where air can
distribute over the entire room.
• Where it is convenient to operate and easily visible.
• Where children cannot easily touch it.
• Select a position about 4 ft. (1.2 m) above the floor.
Check that signals from the remote controller from
that position are received by the indoor unit ('beep'
or'beep beep' receiving tone sounds). Then, attach
remote controller 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.
• Where it is not overly exposed to strong winds. If the
outdoor unit is exposed to a wind during defrosting, the
defrosting time will be longer.
• Where airflow is good and dustless.
• 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.
• If installing the unit in a location high above the ground,
be sure to secure the unit legs.
• Where it is at least 10 ft. (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 recep-
tion is weak. An amplifier may be required for the affected
device.
• Install the unit horizontally.
• Please install it in an area not affected by snowfall or
blowing snow. In areas with heavy snow, please install
a canopy, a pedestal and/or baffle boards.
1-3. SPECIFICATIONS
1-3-1. POWER SUPPLY AND INDOOR/OUTDOOR Electrical specifications
WIRE CONNECTION
• Power should betaken from an exclusive branched circuit.
• Wiring work should be based on applicable technical standards.
• Wiring connections should be made following the diagram.
• Securely tighten screws.
Connecting wires and the ground wire
• Use solid conductor Min. AWG14 or stranded conductor
Min. AWG14.
• Use double insulated copper wire with 600 V insulation.
• Use copper supply wire.
Follow local electrical codes.
Power supply cable and ground wire
• Use solid or stranded conductor Min. AWG14.
• Use copper supply wire.
Follow local electrical codes.
Note:
When the indoor unit is powered from the outdoor unit, depend-
ing on local code, a disconnect switch needs to be installed to a
power supply circuit.
1-3-2. REFRIGERANT PIPES
• To prevent condensation, insulate the two refrigerant pipes.
• Refrigerant pipe bending radius must be 4 in. (100 mm) or more.
0 CAUTION
Be sure to use the insulation of specified thickness (table on the
right). Excessive insulation may cause incorrect installation of
the indoor unit, and too little insulation may cause condensate
to form.
• The unit has flared connections on both indoor and outdoor
sides.
• Remove the valve cover from the outdoor unit, then connect
the pipe.
• Refrigerant pipes are used to connect the indoor and outdoor
units.
• Be careful not to crush or over bend the pipe in pipe bending.
• Refrigerant adjustment... If pipe length exceeds 25 ft. (7.5 m),
additional refrigerant (R410A) charge is required.
(The outdoor unit is charged with refrigerant for pipe length up
to 25 ft. [7.5 m])
Note.
• It is advisable to make a piping loop near outdoor unit
so as to reduce vibration.
• For increased efficiency, install the outdoor unit in a
location where continuous direct sunlight or excessive
water can be avoided as much as possible.
Note:
When operating the air conditioner in low outside tem-
perature, be sure to follow the instructions described
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 and a baffle board
on the air outlet side.
Avoid the following places for installation where air
conditioner trouble is liable to occur.
• Where flammable gas could leak.
• Where there is an excessive amount of machine oil
in the air.
• Where oil is splashed or where the area is filled with
oily smoke (such as cooking areas and factories, in
which the properties of plastic could be changed and
damaged).
Salty places such as the seaside.
Where sulfide gas is generated such as hot spring,
sewage, waste water.
• Where there is high -frequency or wireless equipment.
• Where there is emission of high levels of VOCs, includ-
ing phthalate compounds, formaldehyde, etc., which
may cause chemical cracking.
MODEL
MSZ-GL06NA
MSZ-GL09NA
MSY-GL09NA
I MSZ-GL12NA
MSY-GL12NA
MSZ-GL15NA
MSY-GL15NA
INDOOR UNIT
Power supply (V, PHASE, Hz)
208/230, 1, 60
Min. Circuit Ampacity (A)
1.0
Fan motor (F.L.A.) (A)
0.76
OUTDOOR UNIT
Power supply (V, PHASE, Hz)
208/230, 1, 60
Max. Fuse size (time delay) (A)
15
15
15
Min. Circuit Ampacity (A)
*
9
9
10
Fan motor (F.L.A.) (A)
*
0.50
0.50
0.50
Compressor
(R.L.A) (A)
MSZ
*
6.2
6.6
7.4
MSY
4.9
4.9
6.8
(L.R.A) (A)
MSZ
*
7.7
8.2
9.3
MSY
6.1
6.1
8.5
Control voltage
Indoor unit - Remote controller: (Wireless)
Indoor unit - Outdoor unit: DC12-24 V (Polar)
MSZ-GL06NA is a dedicated indoor unit for multi system. Refer to the installation manual of the multi unit
for details.
Pipe
Outside diameter
Minimum wall
thickness
Insulation thickness
Insulation material
inch (mm)
For liquid
1/4 (6.35)
0.0315 (0.8)
5/16 (8)
Heat resistant foam
plastic 0.045 Spe-
cific gravity
For gas
3/8 (9.52)
0.0315 (0.8)
5/16 (8)
1/2 (12.7)
0.0315 (0.8)
5/16 (8)
Limits
Pipe length
MSZ/MSY-GL09/12/15NA
65 ft. (20 m) max.
Height difference
MSZ/MSY-GL09/12/15NA
40 ft. (12 m) max.
No. of bends
10 max.
Pipe length
Up to 25 ft. (7.5 m)
No additional charge is required.
Exceeding 25 ft. (7.5 m)
Additional charge is required.
(Refer to the table below.)
Refrigerant to be added
MSZ/MSY-GL09/12/15NA
1.08 oz each 5 ft. (20 g/m)
1-4. INSTALLATION DIAGRAM
ACCESSORIES
Check the following parts before installation.
<Indoor unit>
(1)
Installation plate
1
(2)
Attachment screws for the installa-
tion plate
4x25min
5
(3)
Wireless remote controller
1
(4)
Felt tape (For left or left -rear piping)
1
(5)
Remote controller holder
1
(6)
Screws for the remote controller
holder
3.5 x 16 mm (Black)
2
(7)
Battery (AAA) for (3)
2
(8)
Air cleaning filter
2
FIELD -SUPPLIED PARTS
(A)
Indoor/outdoor unit connecting wire*1
1
(B)
Extension pipe
1
(C)
Wall hole sleeve
1
(D)
Wall hole cover
1
(E)
Pipe attachment strap
2 to 5
(F)
Screw for (E) 4 x 20 mm
2 to 5
(G)
Piping tape
1
(H)
Putty
1
(I)
Drain hose
mm)
innerdiam teroorha d/ PVC pipe
VP16)
2 to 5
(J)
Refrigerant oil
1
(K)
Power supply cord *1
1
Note:
*1 Place indoor/outdoor unit connecting wire (A)
and power supply cord (K) at least 3 ft. (1 m)
away from the TV antenna wire.
Use the wall hole sleeve
all hole cover (D)
(C) to prevent indoor/
Indoor unitSeal
the wall hole
outdoor connecting wire
gap with putty (H).
(A) from contacting metal
Wall hole
T
parts in the wall and to
sleeve (C)Attach
the pipe to
protect the wiring from
wall with pipe at -
rodents.
tachment strap (E).
Cut off the
Pipe attachment
E c
E�
9 d
3.718
extra length.
strap (E)
® OO
OVA
in.
c E o .a m
(foo mm
o c y
°fmor°l
Attachment screw (F)
N E22 O d C
Eu N'
Q
4-3/8 in.
\
/(1)
(1fOrnm/or
i� (3) a (5
f A,
(7) %)
*2 4 in. (100 mm) or more when front
and sides of unit are clear
*3 When any 2 sides of left, right and
rear of unit are clear
Unit: inch
31-1/2
5-15/16 19-11 /16
a Air inlet
v
M Q� N
/ a 1-9/16�
2-3/8 x 13116 slot Air outlet
Units should be installed by licensed contractor
according to local code requirements.
After the leak test, apply insulating mate-
rial tightly so that there is no gap.
When the piping is to be attached to a wall
comprised of tin plate or metal netting, use
chemically treated wooden piece 25/32 in.
(20 mm) or thicker between the wall and
the piping, or wrap insulation vinyl tape 7 to
8 turns around the piping.
To use existing piping, perform COOL
operation for 30 minutes and pump down
before removing the old air conditioner.
Remake flare according to the dimension
For new refrigerant.
Unit: mm
800
150 500
8 Air inlet
N N N
N C M
40
/ Air outlet
2-10 x 21 slot
Drain piping for outdoor unit
Install the unit horizontally.
Do not use drain socket 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.
2. INDOOR UNIT INSTALLATION
2-1. ATTACHING THE INSTALLATION PLATE
• Find a stud in the wall to attach installation plate (1) horizontally by tightening the fixing
screws (2) firmly.
• To prevent installation plate (1) from vibrating, be sure to install the attachment screws
in the holes indicated in the illustration. For added support, additional screws may also
be installed in other holes.
• When the indoor unit is to be attached to a concrete wall using recessed bolts, secure
installation plate (1) using 7/16 in. x 13/16 in. - 7/16 in. x 1 in. (11 mm x 20 mm - 11 mm
x 26 mm) oval hole (17-3/4 in. [450 mm] pitch).
• If the recessed bolt is too long, change it for a shorter one (field -supplied).
2-2. DRILLING
1) Determine where the holes will be located on the wall.
2) Drill a o 3 in. (75 mm) hole. The outdoor side should be 6/32 to 9/32 in. (5 to 7 mm) lower
than the indoor side.
3) Insert wall hole sleeve (C).
2-3. CONNECTING WIRES FOR INDOOR UNIT
Note:
When the indoor unit is powered from the outdoor unit, depending on local code, a discon-
nect switch needs to be installed to a power supply circuit.
1) Remove the panel assembly. (Refer to 5-1.)
2) Place the upper part of the indoor unit on the installation plate.
3) Remove corner box and electrical cover.
4) Remove display panel, conduit cover and conduit plate.
5) Attach conduit pipe (for rear piping) / elbow joint (for right, left, or downward piping) to
conduit plate with lock nut. The thread of the installed conduit pipe / elbow joint appearing
inside should be less than 3/8 in. (10 mm). (Fig. 1) Elbow joint should appear less than
1-3/16 in. (30 mm) outside. (Fig. 2)
6) Process the end of ground wire (Fig. 3). Connect it to the ground terminal of electrical parts
box.
7) Process the end of indoor/outdoor unit connecting wire (A) (Fig. 3). Attach it to the terminal
block. Be careful not to make mis-wiring. Attach the wire to the terminal block securely so
that its core cannot be seen, and no external force affects the connecting section of the
terminal block.
8) Firmly tighten the terminal screws. After tightening, verify that the wires are tightly fastened.
9) Reinstall conduit plate, conduit cover and display panel.
10)According to the piping direction, remove the shaded part of the left side of box (Fig. 4)
or corner box (Fig. 5). Reinstall electrical cover, corner box and front panel.
Remark:
INDOOR UNIT
A disconnect switch
should be required.
Grounding
I Terminal block/ terminal**
Check the local code.
Use a ring tongue termi-
S1
2L_
nal in order to connect a
ground wire to terminal.
Disconnect
switch*
208/230 V AC--�--�-
1phase, 60 Hz
OUTDOOR UNIT
Power supply
208/230 V AC,` "
1phase 2wires.
60 Hz
Ground Grounding terminal**
a((19/32 in.
15 mm)
Lead wire
• Make ground wire a little longer than
others. (More than 1-9/16 in. [40 mm])
Fig. 3
Ceiling � 2-1/8 in�(54 mm) or more
5-1/8 in. (130 mm) or more for left
Bind the line to the center hole. and left back piping (using spacer)
Installation plate (1) Level
3-7/8 in. 0 0 °: 4-3/8 in.
(100 mm) Q e (110 in
or more Q _ ° e or more
Wall e O ° Q -- S ° 5-1/8 in.(130 mm) Wall
° oo ° e eoo
Attachment screw (2) Align the plumb Insert Align the Center of
line with the the scale with o 3 in.
mark �. scale. * the line. * (75 mm) hole
Plumb
* Same for left hole.
Wall
03in.
(75 mm) 6/32-9/32 in.
(5-7 mm)
Outdoor side
Electrical cover Electrical box Grounding
\ terminal
Fixing
screw
ra
Indoor terminal
Conduit cover block
Display panel
s
i
Lock nut i0 Conduit pipe
(for rear piping)
Conduit plate i
or
r
Elbow joint
(for right, left, or downward piping)
• Connect wires to the appropriate terminals
• For future servicing, leave some slack in the connecting wires.
Conduit plate
/ Less than 3/8 in.
(10 mm)
Lock nut
Conduit pipe or
elbow joint
Fig. 1
Box
Remove box for Remove box for
piping on left piping on bottom left
side of unit side of unit
Fig. 4
Conduit plate Less than 1-3/16 in.
(30 mm)
Elbow joint
(for right, left, or downward piping)
Fig. 2
Remove corner box for
piping on right side of unit
Remove corner box
for piping on bottom Corner box
right side of unit
Fig. 5
2-4. PIPE FORMING AND DRAIN PIPING
2-4-1. PIPE FORMING
• Place the drain hose below the refrigerant piping.
• Make sure that the drain hose is not crowded or bent.
• Do not pull the hose when applying the tape.
• When the drain hose passes the room, be sure to wrap it with insulation material (field -
supplied).
Note:
Make sure not to damage the cover of refrigerant pipe when attaching it back on with
screws.
Left or left -rear piping
Note:
Be sure to reattach the drain hose and the drain cap if the piping is being installed on
left or bottom left of unit, otherwise, water could drip down from the drain hose.
1)Place the refrigerant piping and the drain hose together, then firmly apply felt tape (4)
from the 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) Pull out the drain cap at the back right 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 back 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 a screwdriver into the hole on the cap and insert the cap fully into the drain
pan.
5) Insert the drain hose fully into the drain pan at the back 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 attach the upper part of indoor unit
onto the installation plate (1). Then, shift the indoor unit completely to the left to make
placing the piping in the back 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) Connect the refrigerant piping with the extension pipe (B).
9) Attach the lower part of the indoor unit into the installation plate (1).
Felt tape (4) Liquid pipe
Piping tape W(G)
Gas pipe
Indoor/outdoor unit
connecting wire (A)
/ Piping tape (G) Remove box for piping on
Felt to a (4) left side of unit.
I
Drain cap
0
1 \N � ,
Drain hose
Fig. 1
Fig. 2
hose
vrain
Drain cap,,4
Fig. 3
Fig. 4
Fig. 5
Rear or bottom piping
1) Place the refrigerant piping and the drain hose together, then firmly apply piping tape
(G) from the end.
2) Insert the piping and the drain hose into the wall hole sleeve (C), and attach the upper
part of the indoor unit on the installation plate (1). Remove corner box for piping
3) Check if the indoor unit is attached securely on the installation plate (1) by moving the on bottom side of unit
unit to left and right.
4) Attach the lower part of the indoor unit into the installation plate (1).
Right piping
Note:
Before performing the following, make sure that wiring is completed, and the conduit
cover is installed. (Refer to 2-3.)
1) Place the refrigerant piping and the drain hose together, shift them to left side of the
unit, and then firmly apply piping tape (G) from the end.
2) Insert the piping and the drain hose into the wall hole sleeve (C), and attach the upper
part of the indoor unit on the installation plate (1).
3) Check if the indoor unit is attached securely on the installation plate (1) by moving the
unit to left and right.
4) Attach the lower part of the indoor unit into the installation plate (1).
Remove
corner box
for piping on
right side of
unit R�
To the left
2-4-2. DRAIN PIPING O
• If the extension drain hose has to pass through a room, be sure to wrap it with insulation Drain Drain hose
hose f Hard vinyl chloride pipe
(field -supplied). 27-9/16 in. I.D. 1-3/16 in.
• The drain hose should point downward for easy drain. (Fig. 1) Downward (70 cm) (30 mm)
• If the drain hose provided with the indoor unit is too short, connect it with a field -supplied slope soft hose or more
drain hose (1). (Fig. 2) f I.D. 19/32 in. Insert
• When connecting the drain hose to a hard vinyl chloride pipe, be sure to insert it securely (15 ni securely
into the pipe. (Fig. 3 Different /'
P P ( 9 ) diameter
joint
Fig. 1 Fig. 2 Fig. 3
Do not make drain piping as shown below.
Do not raise Accumulated At least
drain water Tip of drain 1-31/32 in.
hose dipped (50 mm)
Air in water gap
Water Water Watery
leakage leakage Waving leakage ;,... i Ditch
3. OUTDOOR UNIT INSTALLATION
3-1. CONNECTING WIRES FOR OUTDOOR UNIT
1) Remove the service panel.
2) Remove the conduit cover.
3) Attach the conduit connectors to the conduit plate with lock nuts then secure it against unit with
screws.
4) Connect the ground wires of indoor/outdoor unit connecting wire (A) and power supply cord (K)
to the TB support.
5) Loosen the terminal screws, then attach indoor/outdoor unit connecting wire (A) and power sup-
ply cord (K) from the indoor unit correctly to the terminal block. Attach the wires to the terminal
block securely so that the cores cannot be seen, and no external force affects the connecting
section of the terminal block.
6) Firmly tighten the terminal screws. After tightening, verify that the wires are tightly fastened.
7) Install the conduit cover.
8) Install the service panel securely.
Service panel
iDll /
(DIP ,
Conduit cover
19/32 in.
(15 mm)
Lead wire
L1 L2
Power supply cord (K)
Make earth wire a little longer than others.
(More than 3-7/8 in. [100 mm])
For future servicing, leave some slack in the
connecting wires.
Terminal block
Conduit plate
Conduit pipe Grounding
(Indoor/outdoorunit
connectingctingwire (A)
TB support Power supply cord (K)
to conduit cover
3-2. FLARE CONNECTION
1) Cut the copper pipe as straight as possible with a pipe cutter. (Fig. 1, 2)
2) Remove all burrs from the cut section of the pipe, ensuring that precautions are taken to avoid
getting metal shavings into the piping. (Fig. 3)
3) Remove flare nuts attached to indoor and outdoor units, then put them on pipe.
4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension shown in the table. Select A
inch (mm) from the table according to the tool you use.
5) Check
• Compare the flared work with Fig. 6.
• If flare is defective, cut off the section and repeat procedure.
A inch (mm)
Tightening torque
Pipe diam-
B
Clutch
Clutch
Wing nut
ft-lb
eter inch
inch
(mm)
(mm)
type tool
type tool
type tool
(kgf•cm)
N•m
for R410A
for R22
for R22
o 1/4 (6.35)
21/32
0.06 to
10 to 13
13.7 to 17.7
(17)
0
0.08
(1.5 to
2'0)
(140 to 180)
a 3/8 (9.52)
7/8
25 to 30
34.3 to 41.2
(22)
0 to 0.02
(0 to 0.5)
0.06
(1.0 to
1•5)
(350 to 420)
a 1/2 (12.7)
1-1/32
0.08 to
36 to 42
49.0 to 56.4
(26)
0.10
(2.0 to
2,5)
(500to575)
a 5/8 (15.88)
1-5/32
54 to 58
73.5 to 78.4
(29)
(750 to 800)
Good No good
90o
Copper
pipe
Tilted Uneven Burred
Fig. 1
Fig. 2
Burr Copper pipe
/ Spare reamer
Pipe cutter
Fig. 3
Flaring tool
A
Die Copper pipe
Clutch type Wing nut type
Flare nut
PB
Fig.4
Fig.5
Smooth all around Inside is shin-
ing without any
scratches.
Even length
all around I Fig. 6
3-3. PIPE CONNECTION
• Fasten flare nut with a torque wrench as specified in the table (refer to 3-2.).
• When fastened too tight, flare nut may eventually break 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 flared ends of the pipes. Do not apply re-
frigeration oil on screw threads. Excessive tightening torque will result in damage on the
screw.
• To connect, first align the center, then tighten the first 3 to 4 turns of flare nut.
• Use tightening torque table above as a guideline for indoor unit side joints, and tighten
using two wrenches. Excessive tightening damages the flare section.
Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit following the same procedure
detailed in Indoor unit connection.
• For tightening, use a torque wrench or spanner.
t 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, insulate the piping, including valves.
3) Apply piping tape (G) starting from the connection on the outdoor unit.
• When piping has to be installed through a ceiling, closet or where the temperature and
humidity are high, use additional field -supplied insulation to prevent condensation.
4. PURGING PROCEDURES, LEAK TEST, AND TEST RUN
4-1. PURGING PROCEDURES AND LEAK TEST
1) Remove service port caps from stop valves on both sides of refrigerant lines. (The stop
valves are fully closed when shipped.) Leave closed.
2) Connect gauge manifold to ports of stop valves.
Stop valve cap
'4 to 5 turns (Torque 15 to
Compound pressure gauge
-14.7 psi [Gauge] (for R410A)
22 ft-lb, 19.6 to
'Close
(-0 .101 Mpa) Pressure gauge
29.4 N•m, 200
(for R410A)
Open to 300 kgf•cm) Stop valve
Gauge manifold valve
for R410A)
`+`
Hexagonal wrenchStoharge
Handle High
hose
A
GAor R410A)
Service port cap(Torque
10 to 13 ftAdIb, 13.7 to 17.7 N•m,
140 to 180 kgf•cm)
preventngte
back flow Vacuum um p p (or the vacuum
pump with the function to
prevent the back flow)
Precautions when using the control valve When attaching the control valve
to the service port, valve core mil
deform or loosen if excess pressure
is applied. This may cause gas leak.
6
o/
When attaching the control valve to
Service port
the service port, make sure that the
A
valve core is in closed position, and
Control valve ,,/tl//
Open
then tighten part A. Do not tighten
Close Charge hose
part A or turn the body when valve
Body
core is in open position.
3) Evacuate the system to 4000 microns from both service valves. System manifold gauges
must not be used to measure vacuum. A micron gauge must be used at all times. Break
the vacuum with Nitrogen(N2) into the discharge service valve to 0 PSIG.
4) Evacuate the system to 1500 microns. Break the vacuum with Nitrogen(N2) into the
discharge service valve to 0 PSIG.
5) Evacuate the system to 500 microns.
6) Close gauge manifold valves, stop the pump, and conduct a 30 minute rise test.
7) System should hold 500 microns for a minimum of 1 hour.
8) Fully open all stop valves on both sides of gas pipe and liquid pipe. Operating without
fully opening lowers the performance and this causes trouble.
9) Refer to 1-3 and charge the prescribed amount of additional refrigerant if needed. Be
sure to charge slowly with liquid refrigerant. Otherwise composition of the refrigerant in
the system may be changed and affect performance of the air conditioner.
10) Remove gauge manifolds and replace service port caps and tighten.
11) Leak test
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. Test run will be performed for 30
minutes. If the upper lamp blinks every 0.5 seconds, inspect
the indoor/outdoor unit connecting wire (A). After the test run,
emergency COOL mode (75°F [24°C] COOL) will start.
3) To stop operation, press the E.O. SW several times until all o
LED lamps turn off. Refer to operating instructions for details.
Emergency
operation
switch
(E.O. SW)
Checking the remote (infrared) signal reception
Press the OFF/ON button on the remote controller (3) and listen for an audible indicator
from the indoor unit. Press the OFF/ON button again to turn the air conditioner off.
• Once the compressor stops, the restart preventive device operates so the compressor will
not operate for 3 minutes to protect the air conditioner.
4-3. AUTO RESTART FUNCTION
This product is equipped with an auto restart function. When the power supply is cut off
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.)
Caution:
• After test run or remote signal reception check, turnoff the unit with the E.O. SW or the
remote controller before turning off the power supply. If this procedure is not performed,
the unit will automatically begin operation when power supply is resumed.
To the user
• After installing the unit, explain to the user about auto restart function.
• If auto restart function is unnecessary, it can be deactivated. Consult the service rep-
resentative to deactivate the function. Refer to the service manual for details.
4-4. EXPLANATION TO THE USER
• Using the OPERATING INSTRUCTIONS, explain to the user how to use the air conditioner
(the remote controller, removing the air filters, placing or removing the remote controller from
the remote controller holder, cleaning methods, precautions for operation, etc.)
• Recommend that the user read the OPERATING INSTRUCTIONS carefully.
5. RELOCATION AND MAINTENANCE
5-1. REMOVING AND INSTALLING THE PANEL
ASSEMBLY
Removal procedure
1) Remove the two screws that attach the panel assembly.
2) Remove the panel assembly. Be sure to remove its bottom end first.
2 R' P ti R s.
1 2 1 2
Installation procedure
1) Install the panel assembly following the removal procedure in reverse.
2) Be sure to press the positions as indicated by the arrows in order to attach the as-
sembly completely to the unit.
a a a
r
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 figure on the right.
If the above method cannot be used
Remove the front panel. Then, insert hexagonal wrenches into the square holes on
the left and right sides of the unit and push them up as shown in the following figure.
The bottom of the indoor unit lowers and releases the hooks.
5-3. PUMPING DOWN
When relocating or disposing of the air conditioner, pump down the system following
the procedure below so that refrigerant is not 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) Close the stop valve on the gas pipe side of the outdoor unit almost completely
so that it can be easily closed fully when the pressure gauge shows 0 psi [Gauge]
(0 Mpa).
4) Start the emergency COOL operation.
To startthe emergency operation in COOL mode, disconnect the power supply plug
and/or turn off 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 (0.1 to 0 psi [Gauge] (0.05 to 0 Mpa)).
6) Stop the emergency COOL operation.
To stop operation, press the E.O. SW several times until all LED lamps turn off.
Refer to operating instructions for details.
t WARNING
When pumping down the refrigerant, stop the compressor before discon-
necting the refrigerant pipes. The compressor may burst if air etc. get into it.
I
Wz
f
Push Lower
7.
Square hole
MITSUBISHI ELECTRIC CORPORATION
HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU,
TOKYO 100-8310, JAPAN