Mitsubishi MSZ-A24NA-1, MSY-A15NA-1, MSZ-A15NA-1, MSZ-A17NA, MSZ-A12NA Installation Guide

SG79Y952H03

MITSUB(SHI

ELECTRIC

SPLIT-TYPE AIR CONDITIONERS

INSTALLATION MANUAL

Model names are indicated in 1-3,
When installing multi units, refer to

the installation manual of the multi
unit for outdoor unit installation.

Phillips screwdriver 5/32 in. (4 mm) hexagonal wrench(
Level Flare tool for R410A |

Scale Gauge manifold for R410A |

Utility knife or scissors Vacuum pump for R410A |

2-9/16 in. (65 mm) hole saw Charge hose for R410A |

" Required Tools for |nsta(|ation 1

Torque wrench Pipe cutter with reamer |
Wrench (or spanner)

1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY

• Be sure to read "THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY" before installing the air conditioner.

• Be sure to observe the warnings and cautions specified here as they include important items related to safety.

• After reading this manual, be sure to keep it together with the OPERATING INSTRUCTIONS for future reference.

• 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). [] Attach the electrical cover to the indoor unit and the service panel to the

Incomplete installation could cause fire or electric shock, injury due to the unit fall-
ing, or leakage of water. Consult the dealer from whom you purchased the unit or
a qualified installer.

[] Perform the installation securely referring to the installation manual. []

Incomplete installation could cause fire or electric shock, injury due to the unit fall-
ing, or leakage of water.

[] Install the unit securely in a place which can bear the weight of the unit.

If the installation location cannot bear the weight of the unit, the unit could fall []
causing injury.

[] 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 to a gas pipe, water pipe, lightning rod or telephone []
ground. Defective grounding could cause electric shock.

[] Do not damage the wires by applying excessive pressure with parts or

screws. []

Damaged wires could cause fire.

[] Be sure to cut off the main power in case of setting up the indoor P.C. board

or wiring works.
Failure to do so could cause electric shock.

[] Use the specified wires to connect the indoor and outdoor units securely []

and attach the wires firmly to the terminal block connecting sections so the
stress of the wires is not applied to the sections.
Incomplete connecting and securing could cause fire.

[] Do not install the unit in a place where inflammable gas may leak.

If gas leaks and accumulates in the area around the unit, it could cause an explo- []
sion.

[] Do not use intermediate connection of the power cord or the extension cord

and do not connect many devices to one AC outlet. []
It could cause a fire or an electric shock due to defective contact, defective insula-

tion, exceeding the permissible current, etc.

[] Be sure to 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, clogging, or loose parts in both the outlet and the plug. Make sure

that the power supply plug is pushed completely into the outlet.

If there is dust, clogging, or loose parts on the power supply plug or the outlet, it could
cause electric shock or fire. If loose parts are found on the power supply plug, replace it.

outdoor unit securely.
If the electrical cover of the indoor unit and/or the service panel of the outdoor unit are
not attached securely, itcould result in a fire or an electric shock due to dust, water, etc.

When installing or relocating 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

or an explosion.
Do not discharge the refrigerant into the atmosphere. If refrigerant leaks during
installation, ventilate the room.
If refrigerant comes in contact with a fire, harmful gas could be generated.
Check that the refrigerant gas does not leak after installation has been com-
pleted.
If refrigerant gas leaks indoors, and comes into contact with the flame of a fan
heater, space heater, stove, etc., harmful substances will be generated.
Use appropriate tools and piping materials for installation.
The pressure of R410A is 1.6 times more than R22. Not using appropriate tools or

materials and incomplete installation could cause the pipes to burst or injury.

When pumping down the refrigerant, stop the compressor before discon-

necting 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. This could cause the pipes to burst or injury.

When installing the unit, securely connect the refrigerant pipes before start_

ing the compressor.
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.
Fasten a flare nut with a torque wrench as specified in this manual.
If fastened too tight, a flare nut may break after a long period and cause refrigerant
leakage.
The unit shall be installed in accordance with national wiring regulations.

J

[] install a Ground Fault interrupt (GFI) circuit breaker depending on the instal-

lation place.

If the Ground Fault Interrupt (GFI) circuit breaker is not installed, it could cause
electric shock.

[] Perform 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, soak-
ing and damaging household goods.

[] 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 and touch the electric parts inside the unit, it could cause a
malfunction, smoke emission, or fire. Also, advise user to keep the area around

the unit clean.

1-2. SELECTING THE INSTALLATION LOCATION

me o - Note:

Where airflow is not blocked. In rooms where inverter type fluorescent lamps are used,
Where cool air spreads over the entire room. the signal from the wireless remote controller may not be

Rigid wall without vibration, received.
Where it is not exposed to direct sunshine, o mo e -
Where easily drained. • Where it is not exposed to strong wind.
At a distance 3 ft. (1 m) or more away from your TV •
and radio. Operation of the air conditioner may inter- •
fere 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.

Note:
Install indoor unit at a high position on the wall where air

can distribute over the entire room.

" 0 0 _0 "

• Where it is easy to operate and easily visible.

• Where children cannot touch it.

• Select a position about 4 ft. (1.2 m) above the floor and •
check that signals from the remote controller are surely
received by the indoor unit from that position ('beep' or

Where airflow 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.
When installing the unit at a high level, be sure to se-
cure 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 re-
ception 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 some baffle boards.

'beep beep' receiving tone sounds). After that, attach
remote controller holder to a pillar or wall and install

wireless remote controller.

1-3. SPECiFiCATiONS

1-3-1. POWER SUPPLY AND INDOOR/OUTDOOR WIRE CONNECTION

• Power should be taken from an exclusive branched circuit.

• Wiring work should be based on applicable technical standards.

• Wiring connections should be made following the diagram.

• Screws should be tightened so they will not loosen.

Electrical specifications

MODEL

Note:

• It is advisable to make a piping loop near outdoor unit
so as to reduce vibration transmitted from there.

• 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
temperature, 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.

To prevent exposure to wind, it is recommended to in-
stall a baffle board on the air outlet side of the outdoor

unit.

wold the following places for installation where air

conditioner trouble is liable to occur.

Where flammable gas could leak.
Where there is much machine oil.

Salty places such as the seaside.
Where sulfide gas is generated such as a hot

spring.
Where there is high-frequency or wireless equipment.

MSZ_ A15/17NA MS- MS-

A09/12NA MSY- A09WA A12WA

MSZ-

A15/17NA

Connecting wires and connecting ground wire

• Use solid conductor AWG14 or stranded conductor AWG14.

• Use double insulated copper wire with 600V insulation.

• Use copper conductors only.

• Follow local electrical code.
Power supply cable and ground wire

• Use solid or stranded conductor AWG14.

• Use copper conductors only.

• Follow local electrical code.

Note:

When the indoor unitis powered from the outdoor unit, a disconnect switch needs to be

installed topower supply circuit(between indoor and outdoor unit)depending on local

code.

1-3-2, REFRIGERANT PIPES

• Ensure that the 2 refrigerant pipes are insulated to prevent condensation.

• Refrigerant pipe bending radius must be 4 in. (100 mm) or more.

z_ CAUTION

Be sure to use the insulation of specified thickness. Excessive thickness may cause
incorrect installation of the indoor unit and lack of thickness may cause dew drippage.

• This unit has flared connections on both indoor and outdoor sides.

• Remove the outdoor units valve cover, then connect the pipe.

• Refrigerant pipes are used to connect the indoor and outdoor units.

• Be careful not to crush or bend the pipe in pipe bending.

• Refrigerant adjustment... If pipe length exceeds 25 ft. (7m), additional refrigerant

(R410A) charge is required.

(The outdoor unit is charged with refrigerant for pipe length up to 25 ft. [7 m])

Power supply (V, PHASE, Hz) 208/230, 1, 60 115, 1, 60
Min. Circuit Ampacity 1.0 I 1.0 1.2 I 1.2

Fan motor (F.L.A.) 0.76 0.95

Power supply (V, PHASE, Hz)
Max. Fuse size (time delay) (A)

Min. Circuit Ampacity
Fan motor (F.L.A.)

t (R.L.A)Compressor (L.R.A)

Control voltage

Outside I Minimum Insulation

Pipe

diameter ! wall thick- thicknessness

208/230, 1, 60

15 15
12 14

0.52 0.52

7.8 10.1

9.2 12

Indoor unit - Remote

controller: (Wireless)
Indoor unit - Outdoor

unit: DC12-24V (Polar)

115, 1, 60

15 20
14 16

0.63 0.926

9.30 10.82
47 56

Indoor unit - Remote

controller: (Wireless)

Indoor unit - Outdoor

unit: AC115V

Insulation mate-

rial

inch (mm)

For liquid

MSZ-

A09/12NA

MS-A09WA
MSZ-

For gas

A15/17NA

MSY-A15/
17NA

MS-A12WA

Limits

Pipe length
Height difference

No. of bends

Pipe length

Refrigerant to be
added

1/4 (6.35) (0.8) 5/16 (8)

3/8 (9.52) (0.8) 5/16 (8)

1/2 (12.7) (0.8) 5/16 (8)

MSZ-A09/12/15/17NA

MSY-A15/17NA

65ft. (20 m) max.

40ft. (12 m) max.

Up to 25 ft. (7m)

Exceeding 25 ft. (7m)

MSZ-A09/12/15/17NA

0.0315

0.0315

0.0315

10 max.

MSY-A15/17NA

MS-A09/12WA

Heat resisting
foam plastic

0.045 Specific
gravity

MS-A09/12WA

65ft. (20 m) max.

35ft. (10 m) max.

10 max.

No additional charge is

required.

Additional charge is required.

(Refer to the table below.)

1.62 oz each 5 ft. (30g/m)

1.08 oz. each 5 ft. (20g/m)

1-4. iNSTALLATION DIAGRAM

ACCESSORi ES
Check the following parts before installation.

<Indoor unit>

(1) Installation plate 1
(2) Installation piate fixing screw 4 x 25 mm 5

(3) Remote controller holder 1
(4) Fixing screw for (3) 3.5 x 16 mm (Black) 2

(5) Battery (AAA) for (6) 2
(6) Wireless remote controller 1

(7) Felt tape (For left or left-rear piping) 1
(8) i Air cleaning filter 1

PARTS TO DE PROVIDED
AT YOUR SITE

(A) Indoor/outdoor unit connecting wire* 1
(B) Extension pipe 1
(C) Wall hole sleeve 1

(D) Wall hole cover 1
(E) Pipe fixing band 2 to 5
(F) Fixing screw for (E) 4 x 20 mm 2 to 5
(G) Piping tape 1
(H) Putty 1

Drain hose

(I) (or soft PVC hose, 19/32 in. [15 mm] 2 to 5

inner dia. or hard PVC pipe VP16)

(J) Refrigeration oil 1

(K) Power supply cord 1

(8)_

f

Be sure to use wall hole
sleeve (C) to prevent
indoor/outdoor connecting
wire (A) from contacting
metal parts in the wall and
to prevent damage by

rodents in case the wall is
hollow.

/

I_/_L/wall hole cover (D)

Indoor unit _Seal the wall hole ]

Wall hole ' Vf_]// ......

sl.... (C) /_FL I Fix the,pip etO. . |

• " _/A_I wall with pipe fixing I

.... % Lband (E). j

Cut off the Pipe fixing band

extra length, _)

Fixing screw (F)

,r the leak test, apply insulating mate- |

rial tightly so that there is no gap.

When the piping is to be attached to a
wall containing metals (tin plated) or metal
netting, use a chemically treated wooden

)iece 25/32 in. (20 mm) or thicker between

the wall and the piping or wrap 7 to 8 turns
of insulation vinyl tape 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•

J

* Note:

Place indoor/outdoor unit connecting wire (A)
and power supply cord (K) at least 3 ft. (1 m)
away from the TV antenna wire.

Open two sides of
left, right, or rear

side

Basically open 4 in.
(100 ram) or more

_"without any obstruction

in front and on both
sides of the uniL

31-1/2

Unit: inch

/

(6)

4 in.

(100mm)

or more

(i)

(4)

(3)

(1040i_m)_ (1040i_m)

or _ore _f' ......

_,_,_., II I__l,r;,_l I

_ _ _:_ _(I)

Open two sides of

left, right, or rear

side.

o (350mrn)

33-7/16

or more "_

Unit: inch

Units should be installed by licensed contractor I

[accord ng to oca code requ rements, j

19Ali: i/:,:t

2-3/8 x 13/16 slot _ ,,ir outlet

2-10 mm x 21 mm slot

43. _/16

43-Air inlet

8oo

500 ._

Unit: mm

f

19-11/16

4-3/8 x 13/16 stot

85o

5OO

4-310 mmx21 mm slot

Unit: mm