BLD2022-0137_Manufacturer_Specifications_and_Installation_Instructions_2.1.2022_2.45.54_PM_2654981JG79J820H01
MSZ-FS06/09/12/15/18NA
AkMITSUBISHI
ELECTRIC
SPLIT -TYPE AIR CONDITIONERS
When installing multi units, refer to the
INSTALLATION MANUAL
installation manual of the multi unit for
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.
■ 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.
■ Do not alter the unit.
It may cause fire, electric shock, injury or water leakage.
■ 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
telephone ground. Defective grounding could cause electric shock.
If required, take measures against leakage current.
■ 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.
■ 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.
■ 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.
■ 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.
■ Please follow applicable federal, state, or local codes to prevent potential
leakage/electric shock. Or install a ground fault interrupt for the prevention of
leakage and electric shock.
IN 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.
IN 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.
IN 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.
IN 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.
IN 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.
IN 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.
IN Install the unit according to national wiring regulations.
IN When opening or closing the valve below freezing temperatures, refrigerant may
spurt out from the gap between the valve stem and the valve body, resulting in
injuries.
■ Do not touch the air inlet or the aluminum fins of the outdoor unit.
This could cause injury.
IN 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.
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. 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 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.
1-3. SPECIFICATIONS
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.
• Where airnow is good and dustless.
• Where neighbours are not annoyed by operation sound
or hot 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.
1-3-1. POWER SUPPLY AND INDOOR/OUTDOOR
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 conductors only.
* Follow local electrical codes.
Power supply cable and ground wire
• Use solid or stranded conductor.
FS06/09/12 Min. AWG14
FS15/18 Min. AWG12
• Use copper conductors only.
* 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])
Electrical specifications
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,
including phthalate compounds, formaldehyde, etc.,
which may cause chemical cracking.
MODEL
MSZ-FS06NA
MSZ-FSNA
MSZ-FS1212NA
MSZ-FS15NA
MSZ-FS18NA
INDOOR UNIT
Power supply (V, PHASE, Hz)
208/230, 1, 60
Min. Circuit Ampacity (A)
1.0
Fan motor (F.L.A.) (A)
0.65
OUTDOOR UNIT
Power supply (V, PHASE, Hz)
208/230, 1, 60
Max. Fuse size (time delay) (A)
15
20
Min. Circuit Ampacity (A)
10
18
Fan motor (F.L.A.) (A)
0.50
0.93
(R.L.A) (A)
7.4
13.6
Compressor
(L.R.A) (A)
9.2
17.0
Control voltage
Indoor unit - Remote controller: (Wireless)
Indoor unit - Outdoor unit: DC12-24 V Polar
Outside
Minimum wall
Insulation
Pipe
diameter
I thickness
I thickness
Insulation
material
inch (mm)
For liquid
1/4 (6.35)
0.0315 (0.8)
5/16 (8)
Heat resistant
foam plastic
0.045 Specific
FS06/09/12
3/8 (9.52)
0.0315 (0.8)
5/16 (8)
For gas
gravity
FS15/18
1/2 (12.7)
0.0315 (0.8)
5/16 (8)
Limits
MSZ-FS06/09/12NA
65 ft. (20 m) max.
Pipe length
MSZ-FS15/18NA
100 ft. (30 m) max.
MSZ-FS06/09/12NA
40 ft. (12 m) max.
Height difference
MSZ-FS15/18NA
50 ft. (15 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
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 installation
plate
4x25mm
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
(1)
Drain hose
(or soft PVC hose, 19/32 in. [15 mm]
inner diameter or hard PVC pipe VP16)
1
(J)
Refrigerant oil
1
(K)
Power supply cord*1
1
<FS06/09/12>
'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 oo�ml•3
/2E=\
E c w c
E o0''im
m � E a y
�;`oL
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.
31 1/2 Unit: inch 800 Unit: mm
jAir
19-11/16 150 500
a Air inlet a Air inlet
N...... . . .. .................
aoutlet 1-9/16 40,
Air outlet 40
2-3/8 x 13/16 slot 2-10 x 21 slot
Units should be installed by licensed contractor according to local code requirements.
Note:
• The dimensions indicated in the arrows (0) above
show the required space to guarantee performance of
the air conditioner. Install the outdoor unit where the
maximum possible space can be provided, consider-
ing later relocation, services, or repairs.
• The cooling/heating performance and the efficiency of
power usage may fall about 10% at the place where
short cycle is likely occur due to poor ventilation.
Installing the air outlet guide (optional) can improve
performances.
• If air from the outlet blows against the wall, it may
cause stains on the wall.
V!
Use the wall hole sleeve (C) to prevent
indoor/outdoor connecting wire (A) from
contacting metal parts in the wall and to
protect the wiring from rodents.
Wall hole cover (D)
Indoor unit Seal the wall hole
gap with putty (H).
Wall hole
sleeve (C) Attach the pipe
to wall with pipe at-
tachment strap (E).
Cut off the Pipe attachment
extra length. strap (E)
0
Attachment screw (F)
After the leak test, apply insulating material
tightly so that there is no gap.
E d
�? c
o E When the piping is to be attached to a wall
e Ecomprised of tin plate or metal netting, use
chemically treated wooden piece 25/32 in.
.8 (20 mm) or thicker between the wall and the
piping, or wrap insulation vinyl tape 7 to 8
E turns around the piping.
To use existing piping, perform COOL opera-
tion for 30 minutes and pump down before
removing the old air conditioner. Remake
flare according to the dimension for new
refrigerant.
<FS15/18> a
`m
`2 20 in. (500 mm) or more when front
and sides of unit are clear
o�
41
n / Atn o<tt�Ote
(10
or�O em�l
3 When an 2 sides of left right
0
Y g
and rear of unit are clear g 1 (A� g
amml 4,n ( )
Zp\� o °te °rho Dn,rh
e l
Unit: inch
33-1/16 L 840
6-7/8 19-11/16 175 500
Air inlet Air inlet
L6 M M
Q M Q
J, Air outlet % Air outlet
2-3/8 x 13/16 slot 1-9/16 2-10 x 21 slot
Do not take in the outlet air
discharged by other units directly.
AV4
of t°°tetel
110.0o 00 of mo
Unit: mm
40
of m°total
39 3t Ot' 0\
11p0
M
a
M
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 o3 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:
The unit should be installed by a licensed contractor/electrician. If required by applicable
national, state and local codes; a disconnect switch will need to be installed when the
indoor unit is powered from the outdoor unit.
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 and i-see sensor assembly, conduit cover and conduit plate.
5) Attach straight joint (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 corner box L (Fig. 4) or
corner box R (Fig. 5). Reinstall electrical cover, corner box R and front panel.
Remark:
INDOOR UNIT
A disconnect switch
should be required.
Grounding
Terminal block terminal**
Check the local code.
S1 S2S
Use a ring tongue termi-
L
nal in order to connect a
ground wire to terminal.
i9...E...4.;
-- -- -;
Disconnect
switch*
2081230 V AC
1phase, 60 Hz
OUTDOOR
Power supply 208/230 V AC,�
1 phase 2wires.
60 Hz
eo �
N -eq:c x
�Im
J r a
O Ni:.........
u I E
;
r
Ground
E
Ceiling 3-3/8 in. (85 mm) or more
5-11/16 in. (143 mm) or more for left
left rear piping (using spacer)
Installation plate (1� Level
4-7/8 in. O° CD°� 0 o. 5-1/4 in.
e
(122.5 mm)
Q I
°
° ° (132.5 mm)
o °
or more
° °
e 0 O s
F = or more
Ben • o°
a 8b ^--� 8 4-3/4 in. 120 mm Well
r t
Attachment
a .
r i
screw (2)
Insert Align the Center of o3 in.
the scale with (75 mm) hole
scale. * the line.
* Same for left hole.
Wall
o3 in.
(75 mm) 0 6/32-9/32 in.
(5-7 mm)
Outdoor side
Electrical cover Electrical box
Fixing
screw 4
0
L✓`V
0
f Indoor terminal
/ Lock nut block
Display and i-see i" \ _ 7 Conduit plate
sensor assembly _ 1
Straight joint
Z
�Q)(for rear piping)
Conduit i � i
b or
r
Elbowjoint
(for right, left, or downward piping)
• Connect wires to the appropriate terminals
• For future servicing, leave some slack in the connecting wires.
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)
Piping tape (G)
Liquid pipe
Gas pipe
Indoor/outdoor unit
connecting wire (A)
Piping tak.FR;emove panel for piping
felt tape (4)n left side of unit.
Drain cap
Fig. 1
Drain hose Fig. 2
zDrain cap
! Drain hose
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
( 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 comer box for
3) Check if the indoor unit is attached securely on the installation plate (1) by moving the piping
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 �III�/�(t
box for piping ll_
on right side
of unit
D
To the left
2-4-2. DRAIN PIPING Drain hose
• If the extension drain hose has to pass through a room, be sure to wrap it with insula- 0 Drain
tion(field-supplied). hose f Hard vinyl chloride pipe
27-9/16 in. I.D. 1-3/16 in.
• The drain hose should point downward for easy drain. (Fig. 1) CDownward (70 cm) (3o mm)
• Ifthe drain hose provided with the indoor unit is too short, connect it with a field-suppliedSoft hose or more
drain hose (1). (Fig. 2) I.D. 19/32 in. Insert
• When connecting the drain hose to a hard vinyl chloride pipe, be sure to insert it� (15 mm)Different
securely
securely into the pipe. (Fig. 3) diameter r
joint
Fig. 1 Fig.2 Fig.3
Do not make drain piping as shown below.
Accumulated At least
Do not raise drain water Tip of drain 1-31/32 in.
hose dipped ga mm)
Air in water gap
Water Water Water
leakage leakage Waving leakage ,, 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.
<FS06/09/12>
Service panel
<FS15/18>
Conduit cover
Conduit plate
Conduit pipe
Conduit pipe
19/32 in.
(15 mm)
Lead
wire
L1 L2
Power supply cord (K)
• Make ground wire a little longer than others.
(More than 4 in. [100 mm])
• For future servicing, leave some slack in the
connecting wires.
Term�inal block
• Be sure to attach each screw to its corre-
spondent terminal when securing the cord
and/or the wire to the terminal block.
terminal
Indoor/outdoor unit
connecting wire (A)
TB support to conduit cover
Power supply cord (K)
Terminal block
terminal
\ Indoor/outdoor unit
TB support-� connecting wire (A)
to conduit cover Power supply cord (K)
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
Clutch
Clutch
Wing nut
ft-lb
Pipe diameter
B inch
inch (mm)
(mm)
type tool
type tool
type tool
(kgf•cm)
N-m
for R410A
for R22
for R22
o1/4 (6.35)
21
(17) 7)
0 to 0.02
(0 to 0.5)
0.04 to
.04
(1.0 to 1.5)
0.06 to
0.08
(1.5 to 2.0)
10 to 13
(140 to 180)
13.7 to 17.7
o3/8 (9.52)
7/8
(22)
25 to 30
(350 to 420)
34.3 to 41.2
o1/2 (12.7)
1-1/32
0.08 to
36 to 42
49.0 to 56.4
(26)
0.10
(2.0 to 2.5)
(500 to 575)
05/8 (15.88)
1-5/32
54 to 58
73.5 to 78.4
(29)
(750 to 800)
Good
No good
Copper
pipe
90o
Tilted Uneven Burred
Fig. 1
Fig. 2
Burr Copper pipe
/ Spare reamer
Pipe cutter
Fig. 3
Flaring tool
A
Copper pipe
Die/Flare
7Clutch
nut
e Wing nut type
Fig.4
B 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, by hand.
• 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 Checking the remote (infrared) signal reception
1) Remove service port caps from stop valves on both sides of refrigerant lines. (The stop Press the ON/OFF button on the remote controller (3) and listen for an audible indicator
valves are fully closed when shipped.) Leave closed. from the indoor unit. Press the ON/OFF button again to turn the air conditioner off.
2) Connect gauge manifold to ports of stop valves. Once the compressor stops, the restart preventive device operates so the compressor will
not operate for 3 minutes to protect the air conditioner.
Stop valve cap
*4
Compound pressure gauge
-14.7 psi [Gauge] (for R410A)
to 5 turns (Torque 15 to
(-0.101 Mpa)
22 ft-lb, 19.6 to
*Close
Pressure gauge
29.4 N•m, 200
(for R410A)
*Open to 300 kgf•cm) Stop valve for LIQUID QQ
Gauge manifold valve
Handle (for R410A)
Low
Hexagonal wrench
Handle High
Stop valve for Charge hose
GAS (for R410A)
Service port cap /J
(Torque 10 to 13 It /
-lb, 13.7 to 17.7 N•m,
Adapter for
140 to 180 kgf•cm)
preventing the
back flow Vacuum pump (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 may de-
form or loosen if excess pressure is
applied. This may cause gas leak.
o/
When attaching the control valve to
Service port
A
the service port, make sure that the
Control valve
valve core is in closed position, and
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 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/
Emergency
operation
outdoor unit connectingwire A for mis-wiring. After the test run,
( ) g•
switch
emergency mode (set temperature 75°F [24°C]) will start.
(E.O. SW)
3) To stop operation, press the E.O. SW several times until all LED
lamps turn off. Refer to operating instructions for details.
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. SETTING THE INSTALLATION POSITION
Be sure to set the remote controller in accordance with the installed position of the indoor
unit.
Installation position:
Left: Distance to objects (wall, cabinet, etc.) is less (Left) (Center) (Right)
than 19-11/16 in. (50 cm) to the left
Center: Distance to objects (wall, cabinet, etc.) is O
more than 19-11/16 in. (50 cm) to the left and right D
Right: Distance to objects (wall, cabinet, etc.) is less
than 19-11/16 in. (50 cm) to the right
Note:
The installation position can be set only when all the following conditions are met:
• The remote controller is powered off.
• Weekly timer is not set.
• Weekly timer is not being edited.
WIDEVANE
1) Hold down O on the remote controller for 2 seconds to enter the position setting mode.
2) Select the target installation position by pressing WIDEQVANE (Each press of the WIDEOVANE displays
the positions in order: center —• right —> left.)
3) Press sET to complete the position setting.
Installation position
Left
Center
Right
Remote controller
display
r�
4-5. 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) Unlock the upper and lower vanes as shown in 1O and OO using a thin instrument.
Then, remove the horizontal vanes.
2) Remove the front panel.
3) Remove the 5 screws which fix the panel assembly.
4) The panel assembly consists of 3 components. Remove them in the following order:
right, left, and center bottom. To remove the right component, pull out the right top
corner. To remove the left component, pull out the left bottom corner. To remove the
center bottom component, detach the hook on its upper center part.
1
m
y
Unlock
Upper and
O lower vanes
2s 4
3
3
4ti 31 1 4 1 1 3
Installation procedure
1) Install the panel assembly following the removal procedure in reverse. a
2) Be sure to press the positions as indicated by the arrows in order to attach the assembly
completely to the unit.
3) Install the front panel and the horizontal vanes. 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.
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 start the emergency operation in COOL mode, disconnect the power supply plug
and/orturn offthe breaker. After 15 seconds, connectthe power supply plug and/orturn
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.
1 WARNING
When pumping down the refrigerant, stop the compressor before disconnecting
the refrigerant pipes. The compressor may burst if air etc. get into it.
MITSUBISHI ELECTRIC CORPORATION
HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU,
TOKYO 100-8310, JAPAN