Mitsubishi Electric SLZ-KA25, SLZ-KA35, SLZ-KA50VAQ3 Installation guide

Air-Conditioners
SLZ-KA25, KA35, KA50VAQ3
KA25, KA35, KA50VAL3

INSTALLATION MANUAL

For safe and correct use, please read this manual and the outdoor unit installation manual thoroughly before install­ing the air-conditioner unit.

INSTALLATIONSHANDBUCH

Aus Sicherheitsgründen und zur richtigen Anwendung vor Installation der Klimaanlage die vorliegende Bedienungs­anleitung und das Installationshandbuch gründlich durchlesen.

MANUEL D’INSTALLATION

Avant d’installer le climatiseur, lire attentivement ce manuel, ainsi que le manuel d’installation de l’appareil extérieur
pour une utilisation sûre et correct.

INSTALLATIEHANDLEIDING

Lees deze handleiding en de installatiehandleiding van het buitenapparaat zorgvuldig door voordat u met het instal­leren van de airconditioner begint.

MANUAL DE INSTALACIÓN

Para un uso seguro y correcto, lea detalladamente este manual de instalación antes de montar la unidad de aire
acondicionado.

MANUALE DI INSTALLAZIONE

Per un uso sicuro e corretto, prima di installare il condizionatore d’aria leggere attentamente il presente manuale ed
il manuale d’installazione dell’unità esterna.

EΓΧEIPIΔIO OΔHΓIΩN EΓKATAΣTAΣHΣ

Για σωστή και ασφαλή χρήση, διαβάστε προσεκτικά αυτό το εγχειρίδιο, καθώς και το εγχειρίδιο εγκατάστασης της
εξωτερικής μονάδας, πριν από την εγκατάσταση της μονάδας κλιματιστικού.

MANUAL DE INSTALAÇÃO

Para uma utilização segura e correcta, leia atentamente este manual e o manual de instalação da unidade exterior
antes de instalar o aparelho de ar condicionado.

INSTALLATIONSMANUAL

Läs bruksanvisningen och utomhusenhetens installationshandbok noga innan luftkonditioneringen installeras så att
den används på ett säkert och korrekt sätt.

MONTAJ ELKİTABI

Emniyetli ve doğru kullanım için, klima cihazını monte etmeden önce bu kılavuzu ve dış ünite montaj kılavuzunu
tamamıyla okuyun.

РУКОВОДСТВО ПО УСТАНОВКЕ

Для обеспечения безопасной и надлежащей эксплуатации внимательно прочтите данное руководство и руко­водство по установке наружного прибора перед установкой кондиционера.

FOR INSTALLER

FÜR INSTALLATEURE

POUR L’INSTALLATEUR

VOOR DE INSTALLATEUR

PARA EL INSTALADOR

PER L’INSTALLATORE

ΓΙΑ ΑΥΤΟΝ ΠΟΥ ΚΑΝΕΙ ΤΗΝ ΕΓΚΑΤΑΣΤΑΣΗ

PARA O INSTALADOR

FÖR INSTALLATÖREN

MONTÖR İÇİN

ДЛЯ УСТАНОВИТЕЛЯ

English

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Русский

Contents

1. Safety precautions .....................................................................................2

2. Selecting the installation location ..............................................................2

3. Installation diagram ...................................................................................3

4. Installing the indoor unit ............................................................................3

5. Refrigerant piping work .............................................................................5

Note:
The phrase “Wired remote controller” in this installation manual refers only to the PAR-32MAA. If you need any information for the other remote controller,
please refer to either the installation manual or initial setting manual which are included in these boxes.

6. Drainage piping work .................................................................................6

7. Electrical work ...........................................................................................7

8. Installing the grille ....................................................................................10

9. Test run ....................................................................................................12

1. Safety precautions

• Be sure to read “Safety precautions” before installing the air conditioner.

• Be sure to observe the cautions specifi ed here as they include important
items related to safety.

• The indications and meanings are as follows.

Warning:

Could lead to death, serious injury, etc.

Caution:
Could lead to serious injury in particular environments when operated incor­rectly.

Warning:

• Do not install it by yourself (customer).
Incomplete installation could cause injury due to fi re, electric shock, the unit

falling or leakage of water. Consult the dealer from whom you purchased the
unit or special installer.

• Install the unit securely in a place which can bear the weight of the unit.
When installed in an insuffi cient strong place, the unit could fall causing

injured.

• Use the specifi ed wires to connect the indoor and outdoor units securely and

attach the wires fi rmly to the terminal board connecting sections so the stress
of the wires is not applied to the sections.

Incomplete connecting and fi xing could cause fi re.

• 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 fi re or an electric shock due to defective contact, defective

insulation, exceeding the permissible current, etc.

• Check that the refrigerant gas does not leak after installation has completed.

• Perform the installation securely referring to the installation manual.
Incomplete installation could cause a personal injury due to fi re, electric

shock, the unit falling or leakage of water.

• Perform electrical work according to the installation manual and be sure to

use an exclusive circuit.

If the capacity of the power circuit is insuffi cient or there is incomplete electri-

cal work, it could result in a fi re or an electric shock.

• The user should never attempt to repair the unit or transfer it to another loca-

tion.

Caution:

• Perform grounding.
Do not connect the ground wire to a gas pipe, water pipe arrester or telephone

ground wire. Defective grounding could cause an electric shock.

• Do not install the unit in a place where an infl ammable gas leaks.
If gas leaks and accumulates in the area surrounding the unit, it could cause

an explosion.

• Install a ground leakage breaker depending on the installation place (where

it is humid).

If a ground leakage breaker is not installed, it could cause an electric

shock.

• After reading this manual, be sure to keep it together with the instruction
manual in a handy place on the customer’s site.

: Indicates a part which must be grounded.

Warning:

Carefully read the labels affi xed to the main unit.

• The appliance shall be installed in accordance with national wiring regula-

tions.

• If the supply cord is damaged, it must be replaced by the manufacturer, its

service agent or similarly qualifi ed persons in order to avoid a hazard.

• Attach the electrical part cover to the indoor unit and the service panel to the

outdoor unit securely.

If the electrical part cover in the indoor unit and/or the service panel in the

outdoor unit are not attached securely, it could result in a fi re or an electric
shock due to dust, water, etc.

• Be sure to use the part provided or specifi ed parts for the installation work.

The use of defective parts could cause an injury or leakage of water due to a

fi re, an electric shock, the unit falling, etc.

• Ventilate the room if refrigerant leaks during operation.

If the refrigerant comes in contact with a fl ame, poisonous gases will be

released.

• When installing or relocating, or servicing the air conditioner, use only the

specifi ed refrigerant (R410A) to charge the refrigerant lines. Do not mix it with
any other refrigerant and do not allow air to remain in the lines.

If air is mixed with the refrigerant, then it can be the cause of abnormal high

pressure in the refrigerant line, and may result in an explosion and other
hazards.

The use of any refrigerant other than that specifi ed for the system will cause

mechanical failure or system malfunction or unit breakdown. In the worst
case, this could lead to a serious impediment to securing product safety.

• Perform the drainage/piping work securely according to the installation

manual.

If there is a defect in the drainage/piping work, water could drop from the unit

and household goods could be wet and damaged.

• Fasten a fl are nut with a torque wrench as specifi ed in this manual.

When fastened too tight, a fl are nut may broken after a long period and cause

a leakage of refrigerant.

• If the unit is run for long hours when the air above the ceiling is at high tem-

perature/high humidity (dew point above 26 ºC), dew condensation may be
produced in the indoor unit or the ceiling materials. When operating the units
in this condition, add insulation material (10-20 mm) to the entire surface of
the unit and ceiling materials to avoid dew condensation.

2. Selecting the installation location

2.1. Indoor unit

• Where airfl ow is not blocked.

• Where cool air spreads over the entire room.

• Where it is not exposed to direct sunshine.

• At a distance 1 m or more away from your TV and radio (to prevent picture from
being distorted or noise from being generated).

2.2. Wireless remote controller mounting

(For SLZ-KA·VAL3)

• Place of mounting

• Where it is easy to operate and easily visible.

• Where children can not touch.

• Mounting

Select a position about 1.2 m above the fl oor, check that signals from the remote

controller are surely received by the indoor unit from that position (‘beep’ or ‘beep­beep’ receiving tone sounds). After that, attach remote controller holder to a pillar
or wall and set the wireless remote controller.

2

• In a place as far away as possible from fl uorescent and incandescent lights (so the
infrared remote control can operate the air conditioner normally).

• Where the air fi lter can be removed and replaced easily.

Warning:
Mount the indoor unit into a ceiling strong enough to withstand the weight of
the unit.

In rooms where inverter type fl uorescent lamps are used, the signal from the
wireless remote controller may not be received.

3. Installation diagram

23520

650

650

Fig. 3-1

4. Installing the indoor unit

1

3

6

0

7

A

2

4

8

(mm)









3.1. Indoor unit (Fig. 3-1)

A Ceiling
B Grille
C Obstacle
D Min. 1000 mm
E Min. 500 mm (Entire periphery)
If setting the maintenance space for E, be sure to leave is a minimum of 700 mm.

Warning:

Mount the indoor unit on a ceiling strong enough to withstand the weight of



the unit.

3.2. Outdoor unit

Refer to the outdoor unit installation manual.

4.1. Check the indoor unit accessories (Fig. 4-1)

The indoor unit should be supplied with the following accessories.

Installation template 1

5

9

1

Washers (with insulation)

2

Washers (without insulation)
Pipe cover (for refrigerant piping joint)
small diameter (liquid)

3

large diameter (gas)
Band (large)

4

Band (small)
Screw with washer (M5  25) for mounting grille 4

5

Drain socket 1

6

Insulation 1

7

8 Fixing screw for 9 3.5  16 (Black) (for SLZ-KA·VAL3)

Remote controller holder (for SLZ-KA·VAL3) 1

9

Battery (AAA) (for SLZ-KA·VAL3) 2

0

Wireless remote controller (for SLZ-KA·VAL3) 1

1

Accessory name Q’ty

4
4

1
1
6
2

2

Fig. 4-1

(mm)

4.2. Ceiling openings and suspension bolt installation
locations (Fig. 4-2)

• Using the installation template (top of the package) and the gauge (supplied as an

accessory with the grille), make an opening in the ceiling so that the main unit can
be installed as shown in the diagram. (The method for using the template and the
gauge are shown.)

* Before using, check the dimensions of template and gauge, because they

change due to fl uctuations of temperature and humidity.

* The dimensions of ceiling opening can be regulated within the range shown in

following diagram; so center the main unit against the opening of ceiling, en­suring that the respective opposite sides on all sides of the clearance between
them becomes identical.

• Use M10 (3/8") suspension bolts.

* Suspension bolts are to be procured at the fi eld.

• Install securely, ensuring that there is no clearance between the ceiling panel &

grille, and between the main unit & grille.

A Outer side of main unit
B Bolt pitch
C Ceiling opening
D Outer side of Grille
E Grille
F Ceiling

* Note that the space between ceiling panel of the unit and ceiling slab, etc., must be 10 to 15

mm to be left.

* Leave the maintenance space at the electric component box end.

G Min. 500 mm (Entire periphery)
If setting the maintenance space for G, be

sure to leave is a minimum of 700 mm.

H Maintenance space
I Fresh air intake
J Angle
K Electric component box

Fig. 4-2

3

4. Installing the indoor unit

4.3. Installation of duct (in case of fresh air intake)
(Fig. 4-3)

Linkage of duct fan and air conditioner
ln case that a duct fan is used, be sure to make it linked with the air conditioner
when outside air is taken.

208

Do not run the duct fan only. It can cause dew drop.

Making a duct fl ange (prepared locally)

• The shape of duct fl ange shown left is recommended.

Installation of duct fl ange

0

• Cut out the cutout hole. Do not knock it out.

+5

27

• Install a duct fl ange to the cutout hole of the indoor unit with three 4  10 tapping

Installation of duct (should be prepared locally)

• Prepare a duct of which inner diameter fi ts into the outer diameter of the duct

• In case that the environment above the ceiling is high temperature and high humidity,

120

(mm)

92

AC

120

30



75

120

100

15

20

120

70

25



100















Fig. 4-3

4.4. Suspension structure (Give site of suspension

• The ceiling work differs according to the construction of the building. Building con-

(1) Extent of ceiling removal: The ceiling must be kept completely horizontal and the

(2) Cut and remove the ceiling foundation.
(3) Reinforce the ends of the ceiling foundation where it has been cut and add ceiling

(4) When installing the unit on a slanting ceiling, interlock a pillow between the ceiling

1 Wooden structures

• Use tie beams (single-story houses) or second fl oor beams (two story houses) as

• Wooden beams for suspending air conditioners must be sturdy and their sides must

2 Ferroconcrete structures
Secure the suspension bolts using the method shown, or use steel or wooden hang­ers, etc. to install the suspension bolts.

4.5. Unit suspension procedures (Fig. 4-5)

Suspend the main unit as shown in the diagram.

1. In advance, set the parts onto the suspension bolts in the order of the washers

• Fit the washer with cushion so that the insulation faces downward.

• In case of using upper washers to suspend the main unit, the lower washers (with

2. Lift the unit to the proper height of the suspension bolts to insert the mounting

3. When the main unit can not be aligned against the mounting hole on the ceiling,

• Make sure that step A is performed within 27-32 mm. Damage could result by

4.6. Confi rming the position of main unit and tightening

• Using the gauge attached to the grille, ensure that the bottom of the main unit is

• Confi rm that the main unit is horizontally levelled, using a level or a vinyl tube fi lled

• After checking the position of the main unit, tighten the nuts of the suspension bolts

• The installation template can be used as a protective sheet to prevent dust from

* As for the details of fi tting, refer to the instructions given on the Installation template.







1

*B





D Ceiling
E Rafter
F Beam
G Roof beam









A Suspension bolt (Procure locally)
B Ceiling
C Nut (Procure locally)
D Washer (with insulation) (Accessory)





A Unit
B Grille
C Pillow

*B

2





H Use inserts rated at 100-150 kg

each (procure locally)

I Suspension bolts M10 (3/8") (procure

locally)

J Steel reinforcing rod

*B: Suspension bolt pitch (see Fig. 4-2 B for details)



Fig. 4-4











+5

0





27

Min. 30

93



E Mounting plate
F Washer (without insulation) (Accessory)
G Check using the Installation gauge

Fig. 4-5

A Main unit
B Ceiling
C Gauge (Grille accessory)
D Ceiling opening dimensions

Fig. 4-6

A Main unit
B Ceiling
C Installation template (Accessory)





D Screw with washer (Accessory)

Fig. 4-7

Caution:

screws which should be prepared locally.

fl ange.

wrap the duct in a heat insulate to avoid causing dew drop on the wall.

A Duct fl ange recommended shape
(Thickness:0.8 or more)

B 3-ø5 hole
C Detail drawing of fresh air intake
D Indoor unit
E Ceiling surface

F 3-ø2.8 Burring hole
G ø73.4 cutout hole
H Duct fl ange (Prepared locally)
I 4  10 Tapping screw (Prepared locally)
J Duct

strong structure) (Fig. 4-4)

structors and interior decorators should be consulted for details.

ceiling foundation (framework: wooden slats and slat holders) must be reinforced
in order to protect the ceiling from vibration.

foundation for securing the ends of the ceiling board.

and the grille and set so that the unit is installed horizontally.

reinforcing members.

be at least 6 cm long if the beams are separated by not more than 90 cm and their
sides must be at least 9 cm long if the beams are separated by as much as 180
cm. The size of the suspension bolts should be ø10 (3/8

"). (The bolts do not come

with the unit.)

(with insulation), washers (without insulation) and nuts (double).

insulation) and nuts (double) are to be set later.

plate between washers and then fasten it securely.

it is adjustable owing to a slot provided on the mounting plate. (Fig. 4-6)

failing to adhere to this range.

the suspension bolts (Fig. 4-7)

properly aligned with the opening of the ceiling. Be sure to confi rm this, otherwise
condensation may form and drip due to air leakage etc.

with water.

securely to fasten the main unit.

entering the main unit when the grilles are left unattached for a while or when the
ceiling materials are to be lined after installation of the unit is fi nished.

4

5. Refrigerant piping work



SLZ-KA25, KA35: ø9.52
SLZ-KA50: ø12.7

/

/

/

0

1

A Indoor unit

ø6.35

B Outdoor unit



Fig. 5-1

a Copper tubes

90

21034

b Good
c No good
d Tilted
e Uneven
f Burred

5.1. Refrigerant pipe (Fig. 5-1)

Piping preparation

• Refrigerant pipes of 3, 5, 7, 10 and 15 m are available as optional items.

(1) Table below shows the specifi cations of pipes commercially available.

Model Pipe

SLZ-KA25

SLZ-KA35

SLZ-KA50

(2) Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
(3) Refrigerant pipe bending radius must be 100 mm or more.

Using careful insulation of specifi ed thickness. Excessive thickness prevents
storage behind the indoor unit and smaller thickness causes dew drippage.

For liquid 6.35 1/4 0.8 mm 8 mm

For gas 9.52 3/8 0.8 mm 8 mm

For liquid 6.35 1/4 0.8 mm 8 mm

For gas 9.52 3/8 0.8 mm 8 mm

For liquid 6.35 1/4 0.8 mm 8 mm

For gas 12.7 1/2 0.8 mm 8 mm

Caution:

Outside diameter

mm inch

Min. wall

thickness

Insulation
thickness

Insulation

material

Heat resist-

ing foam

plastic 0.045

specifi c

gravity

5.2. Flaring work

• Main cause of gas leakage is defect in fl aring work.

Carry out correct fl aring work in the following procedure.

5.2.1. Pipe cutting (Fig. 5-2)

• Using a pipe cutter cut the copper tube correctly.

Fig. 5-2

0

1

2

a Burr
b Copper tube/pipe
c Spare reamer
d Pipe cutter

Fig. 5-3

/

0

a Flare nut
b Copper tube

Fig. 5-4

A

3

2

0

1

a Flaring tool
b Die
c Copper tube
d Flare nut
e Yoke

5.2.2. Burrs removal (Fig. 5-3)

• Completely remove all burrs from the cut cross section of pipe/tube.

• Put the end of the copper tube/pipe to downward direction as you remove burrs in

order to avoid burrs drop in the tubing.

5.2.3. Putting nut on (Fig. 5-4)

• Remove fl are nuts attached to indoor and outdoor unit, then put them on pipe/tube

having completed burr removal.

(not possible to put them on after fl aring work)

5.2.4. Flaring work (Fig. 5-5)

• Carry out fl aring work using fl aring tool as shown at the right.

Dimension

Pipe diameter

(mm)

6.35 0 - 0.5 9.1

9.52 0 - 0.5 13.2

12.7 0 - 0.5 16.6

Firmly hold copper tube in a die in the dimension shown in the table at above.

When the tool for R410A is used

A (mm)

Clutch type

+0

B

(mm)

-0.4

Fig. 5-5

0

/

B

23456

1

7

Fig. 5-6

5.2.5. Check (Fig. 5-6)

• Compare the fl ared work with a fi gure in right side hand.

• If fl are is noted to be defective, cut off the fl ared section and do fl aring work

again.

a Smooth all around
b Inside is shining without any scratches

c Even length all around
d Too much

e Tilted

f Scratch on fl ared plane
g Cracked

h Uneven
i Bad examples

5.3. Refrigerant and drainage piping locations (Fig.5-7)

A Drain pipe
B Ceiling
C Grille
D Refrigerant pipe (liquid)
E Refrigerant pipe (gas)
F Water supply inlet
G Main unit

A

As viewed from A

Fig. 5-7

5

5. Refrigerant piping work



,









A Refrigerant pipe and insulating material

B Pipe cover (large) (Accessory)
C Pipe cover (small) (Accessory)
D Refrigerant pipe (gas)
E Refrigerant pipe (liquid)
F Band (Accessory)
G Cross-sectional view of connection
H Refrigerant pipe
I Insulating material
J Squeeze

Fig. 5-8

(Procure locally)

5.4. Pipe connection (Fig. 5-8)

Indoor unit

1) When using commercially available copper pipes:

• Apply thin layer of refrigerant oil to pipe and joint seating surface before tightening
fl are nut.

• Use two wrenches to tighten piping connections.

• Air-purge the refrigerant piping using your own refrigerant gas (don’t air-purge the
refrigerant charged in the outdoor unit).

• Use leak detector or soapy water to check for gas leaks after connections are
completed.

• Use refrigerant piping insulation provided to insulate indoor unit connections. Insulate
carefully following shown below.

2) Heat insulation for refrigerant pipes:

1 Wrap the enclosed large-sized pipe cover around the gas pipe, making sure that

the end of the pipe cover touches the side of the unit.

2 Wrap the enclosed small-sized pipe cover around the liquid pipe, making sure that

the end of the pipe cover touches the side of the unit.

3 Secure both ends of each pipe cover with the enclosed bands. (Attach the bands

20 mm from the ends of the pipe cover.)
See that stop valve on outdoor unit is fully shut (unit is shipped with valve shut).
After all piping connections between indoor and outdoor unit have been completed,
vacuum-purge air from system through the service port for the stop valve on the
outdoor unit.
After completing procedures above, open outdoor unit stop valves stem fully. This
completes connection of refrigerant circuit between indoor and outdoor units. Stop
valve instructions are marked on outdoor unit.

• Apply a thin coat of refrigeration oil on the seat surface of pipe. (Fig. 5-9)

• For connection fi rst align the center, then tighten the fi rst 3 to 4 turns of fl are nut.

• Use tightening torque table below as a guideline for indoor unit side union joint

section, and tighten using two wrenches. Excessive tightening damages the fl are
section.

Fig. 5-9

6. Drainage piping work

1



2





Max. 20 m

1.5–2 m

























Copper pipe O.D.

(mm)

Flare nut O.D.

(mm)

Tightening torque

(N·m)
ø6.35 17 14 - 18
ø9.52 22 34 - 42
ø12.7 26 49 - 61

Warning:
Be careful of fl ying fl are nut! (Internally pressurized)
Remove the fl are nut as follows:

1. Loosen the nut until you hear a hissing noise.

2. Do not remove the nut until the gas has been completely released (i.e., hiss-

ing noise stops).

3. Check that the gas has been completely released, and then remove the

nut.

6.1. Drainage piping work (Fig. 6-1)

• Use VP25 (O. D. ø32 PVC TUBE) for drain piping and provide 1/100 or more

downward slope.

• Be sure to connect the piping joints using a polyvinyl type adhesive.

• Observe the fi gure for piping work.

• Use the included drain hose to change the extraction direction.

1 Correct piping
2 Wrong piping
A Insulation (9 mm or more)
B Downward slope (1/100 or more)

Grouped piping

D O. D. ø32 PVC TUBE
E Make it as large as possible

Max. 150 mm







F Indoor unit
G Make the piping size large for grouped piping.
H Downward slope (1/100 or more)
I O. D. ø38 PVC TUBE for grouped piping.

(9 mm or more insulation)

J Up to 500 mm

C Support metal
K Air bleeder
L Raised
M Odor trap

Fig. 6-1

6

6. Drainage piping work



 

30 30

11

 

7. Electrical work



For Power supply



30







Fig. 6-2



S3

S2S1

A Indoor unit
B Outdoor unit
C Wired remote controller
D Wired main switch/fuse
E Grounding

(mm)

,





1. Connect the drain socket (supplied with the unit) to the drain port. (Fig. 6-2)
(Affi x the tube using PVC adhesive then secure it with a band.)

2. Install a locally purchased drain pipe (PVC pipe, O.D. ø32).
(Affi x the pipe using PVC adhesive then secure it with a band.)

3. Insulate the tube and pipe. (PVC pipe, O.D. ø32 and socket)



4. Check that drain fl ows smoothly.

5. Insulate the drain port with insulating material, then secure the material with a
band. (Both insulating material and band are supplied with the unit.)

A Main unit
B Insulating material
C Band (large)
D Drain port (transparent)
E Insertion margin
F Matching

G Drain pipe (O.D. ø32 PVC TUBE)
H Insulating material (purchased locally)
I Transparent PVC pipe
J O.D. ø32 PVC TUBE (Slope 1/100 or more)
K Band (small)
L Drain socket

7.1. Precautions (Fig. 7-1)

S1



S2
S3

21



Electrical specifi cation Input capacity Main Switch/Fuse (A)

Power supply

(1 phase ~/N, 230V,

50Hz)

• The compressor will not operate unless the power supply phase connection is cor-

rect.

• Grounding protection with a no-fuse breaker (earth leakage breaker [ELB]) is usually

installed for D.

• The connection wiring between the outdoor and indoor units can be extended up

to a maximum of 50 meters, and the total extension including the crossover wiring
between rooms is a maximum of 80 m.

A switch with at least 3.5 mm contact separation in each pole shall be provided by
the air conditioner installation.
* Label each breaker according to purpose (heater, unit etc.).

SLZ-KA25 SLZ-KA35 SLZ-KA50

10 10 20

For Power

supply





  





Fig. 7-1

A Electric component cover
B Electric component box
C Entry for Indoor-Outdoor connecting cable
D Entry for wired remote controller cable
E Cable clamp

Fig. 7-2

F Indoor/Outdoor unit connecting terminal
G Wired remote controller terminal

(For SLZ-KA·VAQ3)

H Indoor controller
I Earth cable

7.2. Indoor unit (Fig. 7-2) (Fig. 7-3)

Work procedure

1. Remove 2 screws to detach the electric component cover.

2. Route each cable through the wiring intake into the electric component box. (Procure

power supply cable and indoor/outdoor connecting cable locally.)

3. Securely connect the power supply cable and the indoor/outdoor connecting cable

to the terminal blocks.

4. Secure the cables with clamps outside the electric component box.

5. Attach the electric component cover as it was.

• Fix power supply cable and indoor/outdoor connecting cable to electric component

box by using buffer bushing for tensile force. (PG connection or the like.)

Warning:

• Attach the electric component cover securely. If it is attached incorrectly, it

could result in a fi re, electric shock due to dust, water, etc.

• Use the specifi ed indoor/outdoor unit connecting cable to connect the indoor

and outdoor units and fi x the cable to the terminal block securely so that no
stress is applied to the connecting section of the terminal block. Incomplete
connection or fi xing of the cable could result in a fi re.





Fig. 7-3





S1S2 S3 1 2







7

7. Electrical work

• Perform wiring as shown in the diagram to the lower left. (Procure the cable locally).
(Fig. 7-4)

Make sure to use cables of the correct polarity only.

1 Connecting cable
Cable 3-core 1.5 mm2, in conformity with Design 245 IEC 57.

2 Indoor terminal block
3 Outdoor terminal block
4 Always install an earth wire (1-core 1.5 mm2) longer than other cables
5 Remote controller cable (non-polar)

Cable 2-core 0.3 mm
The 10 m wire is attached in the remote controller accessory. Max. 500 m

6 Wired remote controller
7 Power supply cord

Caution:

• Use care not to make miswiring.

• Firmly tighten the terminal screws to prevent them from loosening.

• After tightening, pull the wires lightly to confi rm that they do not move.

• Wiring for remote controller cable shall be apart (5 cm or more) from power
source wiring so that it is not infl uenced by electric noise from power source
wiring.

2

12





Indoor terminal block







Outdoor terminal block



Power supply cord

Fig. 7-4

Earth wire (green/yellow)



Indoor/outdoor unit
connecting wire
3-core 1.5 mm

L

N

2

or more

7.3. Remote controller





A Wireless remote controller (Accessory)
B Wall
C Remote controller holder (Accessory)
D Fixing screw (Accessory)



Fig. 7-5



7.3.1. Wireless remote controller (Fig. 7-5)

1) Installation area

• Area in which the remote controller is not exposed to direct sunshine.

• Area in which there is no nearby heating source.

• Area in which the remote controller is not exposed to cold (or hot) winds.

• Area in which the remote controller can be operated easily.

• Area in which the remote controller is beyond the reach of children.

2) Installation method

1 Attach the remote controller holder to the desired location using two tapping screws.
2 Place the lower end of the controller into the holder.

• The signal can travel up to approximately 7 meters (in a straight line) within 45
degrees to both right and left of the center line of the receiver.

In addition, the signal may not be received if there is interference of light of fl uores-

cent lights or strong sunlight.

7.3.2. Wired remote controller

1) Installing procedures

Refer to the installation manual that comes with each remote controller for details.

2) Function selection of remote controller

If two remote controllers are connected, set one to “Main” and the other to “Sub”. For
setting procedures, refer to “Function selection of remote controller” in the operation
manual for the indoor unit.

7.4. Function settings

7.4.1 Function setting on the unit (Selecting the unit functions)

1) FUNCTION

Indoor controller board

This model is equipped with the FUNCTION.
(the DIP switch on the indoor controller board)
When the indoor unit is controlled with the remote controller, the operation mode, set
temperature, and the fan speed are memorized by the indoor controller board.

Factory default setting

Switch Function Switch setting Setting

SW3-1

SW3-3

Power failure automatic re­covery
Fan speed when the heating
thermostat is OFF

SW3

15

2

34

ON
OFF

ON Available

OFF Not available

ON Stop

OFF Extra low

8

7. Electrical work

Service menu

Test run
Input maintenance info.
Function setting
Check
Self check

Main menu:

Cursor

F1 F2 F3 F4

Fig. 7-6 Fig. 7-7

Function setting

Ref. address
Mode 1
Mode 2
Mode 3
Mode 4

Request:

Cursor Cursor

F1 F2 F3 F4

Grp.

Fig. 7-8 Fig. 7-9

Function setting

Ref. address

Grp.

Sending data

Function setting

Ref. address
Unit No.

Monitor:

Cursor Address

Grp./1/2/3/4/All

F1 F2 F3 F4

Function setting

Ref. address
Mode 7
Mode 8
Mode 9
Mode 10

Request:

Cursor Cursor

Unit # 1

F1 F2 F3 F4

For wired remote controller only

(Fig. 7-6)

1

• Select “Service” from the Main menu, and press the [SELECT] button.

• Select “Function settings” with the [F1] or [F2] button, and press the [SELECT]
button.

(Fig. 7-7)

2

• Set the indoor unit refrigerant addresses and unit numbers with the [F1]
through [F4] buttons, and then press the [SELECT] button to confi rm the cur-
rent setting.

<Checking the Indoor unit No.>

When the [SELECT] button is pressed, the target indoor unit will start fan
operation. If the unit is common or when running all units, all indoor units for the
selected refrigerant address will start fan operation.

(Fig. 7-8)

3

• When data collection from the indoor units is completed, the current settings
appears highlighted. Non-highlighted items indicate that no function settings
are made. Screen appearance varies depending on the “Unit No.” setting.

(Fig. 7-9)

4

• Use the [F1] or [F2] button to move the cursor to select the mode number, and
change the setting number with the [F3] or [F4] button.

(Fig. 7-10)

5

• When the settings are completed, press the [SELECT] button to send the set­ting data from the remote controller to the indoor units.

• When the transmission is successfully completed, the screen will return to the
Function setting screen.

Note:

• Make the above settings on Mr. Slim units as necessary.

• Table 1 summarizes the setting options for each mode number. Refer to the
indoor unit Installation Manual for the detailed information about initial set­tings, mode numbers, and setting numbers for the indoor units.

• Be sure to write down the settings for all functions if any of the initial set­tings has been changed after the completion of installation work.

F1 F2 F3 F4

Fig. 7-10

Function table

Select unit number 00

Mode Settings Mode no. Setting no.
Power failure automatic recovery *1
(AUTO RESTART FUNCTION)
Indoor temperature detecting

LOSSNAY connectivity

Power voltage 240 V

Select unit numbers 01 to 03 or all units (AL)

Mode Settings Mode no. Setting no.
Filter sign 100 Hr

*1 For this model, mode no. 1 cannot be set using the remote controller. Set this mode using DIP switch SW3-1 of the indoor controller board.

Not available
Available 2*1

01

Indoor unit operating average
Set by indoor unit’s remote controller 2

02

1*1

1

Remote controller’s internal sensor 3
Not Supported
Supported (indoor unit is not equipped with outdoor-air intake) 2

03

1

Supported (indoor unit is equipped with outdoor-air intake) 3

220 V, 230 V 2

04

1

1

2500 Hr 2

07

No fi lter sign indicator 3

Initial setting

Initial setting

Setting

Setting

9

8. Installing the grille

1

23

45

Fig. 8-1

Fig. 8-2

8.1. Check the grille accessories (Fig. 8-1)

• The grille should be supplied with the following accessories.

Accessory name Q’ty Remark

Grille 1 650 × 650 (mm)

1

Screw with washer 4 M5 × 0.8 × 25 (mm)

2

Gauge 1

3

Fastener 2

4

Band 2

5

8.2. Preparing to attach the grille (Fig. 8-2)

• With the gauge supplied with this kit, adjust and check the positioning of the unit
relative to the ceiling. If the unit is not properly positioned in the ceiling, there may
be air leaks, condensation may form, or the up/down vanes may not operate cor­rectly.

• Make sure that the opening in the ceiling is within the following tolerances:

576  576 - 620  620

• Make sure that step A is performed within 27-32 mm. Damage could result by failing
to adhere to this range.

A Main unit
B Ceiling
C Gauge (Accessory)
D Ceiling opening dimensions













8.2.1. Removing the intake grille (Fig. 8-3)

• Slide the levers in the direction indicated by the arrow 1 to open the intake grille.

• Unlatch the hook that secures the grille.

* Do not unlatch the hook for the intake grille.

• With the intake grille in the “open” position, remove the hinge of the intake grille
from the grille as indicated by the arrow 2.





Fig. 8-3

8.2.2. Removing the corner panel (Fig. 8-4)











Fig. 8-4

(mm)

• Remove the screw from the corner of the corner panel. Slide the corner panel as
indicated by the arrow 1 to remove the corner panel.

A Intake grille
B Grille
C Intake grille levers
D Grille hook
E Hole for the grille’s hook
F Corner panel
G Screw

8.3. Installing the grille

• Please pay attention because there is a restriction in the attachment position of the
grille.

10

Fig. 8-5



15~20



8.3.1. Preparations (Fig. 8-5)

• Install the two enclosed screws with washer in the main unit (at the corner refrigerant
pipe area and at the opposite corner) as shown in the diagram.

A Main unit
B Detailed diagram of installed screw with washer (accessory).