Mitsubishi Electronics PAC-MK51BC, PAC-MK31BC Installation Manual

Air-Conditioners Indispensable Optional Parts
BRANCH BOX

PAC-MK51BC
PAC-MK31BC

HFC

utilized

ONLY FOR R410A OUTDOOR UNIT
ONLY FOR INDOOR USE

INSTALLATION MANUAL

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

INSTALLATIONSHANDBUCH

Zum sicheren und ordnungsgemäßen Gebrauch der Klimaanlage das Installationshandbuch gründlich
durchlesen.

MANUEL D’INSTALLATION

Veuillez lire le manuel d’installation en entier avant d’installer ce climatiseur pour éviter tout accident et vous
assurer d’une utilisation correcte.

INSTALLATIEHANDLEIDING

Voor een veilig en juist gebruik moet u deze installatiehandleiding grondig doorlezen voordat u de aircondi­tioner installeert.

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, leggere attentamente questo manuale di installazione prima di installare il con­dizionatore d’aria.

ΕΓΧΕΙΡΙΔΙΟ ΟΔΗΓΙΩΝ ΕΓKATAΣTAΣHΣ

Για ασφάλεια και σωστή χρήση, παρακαλείστε διαβάσετε προσεχτικά αυτό το εγχειρίδιο εγκατάστασης πριν
αρχίσετε τηv εγκατάσταση της μονάδας κλιματισμού.

MANUAL DE INSTALAÇÃO

Para segurança e utilização correctas, leia atentamente este manual de instalação antes de instalar a uni­dade de ar condicionado.

INSTALLATIONSMANUAL

Læs venligst denne installationsmanual grundigt, før De installerer airconditionanlægget, af hensyn til sikker
og korrekt anvendelse.

INSTALLATIONSMANUAL

Läs denna installationsmanual noga för säkert och korrekt bruk innan luftkonditioneringen installeras.

FOR INSTALLER

FÜR INSTALLATEURE

POUR L’INSTALLATEUR

VOOR DE INSTALLATEUR

PARA EL INSTALADOR

PER L’INSTALLATORE

ΓΙA AYΤΟΝ ΠΟΥ ΚΑΝΕΙ ΤΗΝ ΕΓΚΑTAΣΤAΣΗ

PARA O INSTALADOR

TIL INSTALLATØREN

FÖR INSTALLATÖREN

R410A

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MONTAJ ELKİTABI

Emniyetli ve doğru biçimde nasıl kullanılacağını öğrenmek için lütfen klima cihazını monte etmeden önce bu
elkitabını dikkatle okuyunuz.

РУКОВОДСТВО ПО УСТАНОВКЕ

Для осторожного и правильного использования прибора необходимо тщательно ознакомиться с данным руководс­твом по установке до выполнения установки кондиционера.

MONTÖR İÇİN

ДЛЯ УСТАНОВИТЕЛЯ

Türkçe

Русский

Contents

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

2. Selecting a location for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

3. Confi rming supplied accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

4. Dimensions and required servicing space of Branch Box . . . . . . . . . . . . . . . . 3

5. Refrigerant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

This installation manual is only for the branch box installation. In installing the indoor units and outdoor units, refer to the installation manual attached to
each unit.

6. Mounting the Branch Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

7. Installing refrigerant piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

8. Electrical work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

9. Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1. Safety precautions

► Before installing the unit, make sure you read all the “Safety precau-

tions”.

► Please report to or take consent by the supply authority before connec-

tion to the system.
► PAC-MK•BC series are designed as professional equipment.
When installing the unit in a regular house, install the optional Reactor

Box (PAC-RB01BC) for harmonic suppression.
► When receiving electricity from the outdoor unit, applicable standards for

the outdoor unit may not be satisfi ed depending on the indoor unit used.

Warning:
Describes precautions that must be observed to prevent danger of injury or
death to the user.

Warning:

• The unit must not be installed by the user.

• Ask a dealer or an authorized technician to install the unit.

• For installation work, follow the instructions in the Installation Manual and

use tools and pipe components specifi cally made for use with refrigerant
specifi ed in the outdoor unit installation manual.

• The unit must be installed according to the instructions in order to mini-

mize the risk of damage from earthquakes, typhoons, or strong winds. An
incorrectly installed unit may fall down and cause damage or injuries.

• The unit must be securely installed on a structure that can sustain its

weight.

• If the air conditioner is installed in a small room, measures must be taken

to prevent the refrigerant concentration in the room from exceeding the
safety limit in the event of refrigerant leakage. Should the refrigerant leak
and cause the concentration limit to be exceeded, hazards due to lack of
oxygen in the room may result.

• Ventilate the room if refrigerant leaks during operation. If refrigerant comes

into contact with a fl ame, poisonous gases will be released.

• All electric work must be performed by a qualifi ed technician according to

local regulations and the instructions given in this manual.

• Use only specifi ed cables for wiring.

• The terminal block cover panel of the unit must be fi rmly attached.

• Use only accessories authorized by Mitsubishi Electric and ask a dealer or

an authorized technician to install them.

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

cation.

• After installation has been completed, check for refrigerant leaks. If refriger-

ant leaks into the room and comes into contact with the fl ame of a heater or
portable cooking range, poisonous gases will be released.

• Be sure to connect the power supply cords and the connecting wires for the

indoor units, outdoor units, and branch boxes directly to the units (no inter­mediate connections).
Intermediate connections can lead to communication errors if water enters
the cords or wires and causes insuffi cient insulation to ground or a poor
electrical contact at the intermediate connection point.
(If an intermediate connection is necessary, be sure to take measures to
prevent water from entering the cords and wires.)

Caution:

Describes precautions that must be observed to prevent damage to the unit.

After installation work has been completed, explain the “Safety Precautions,” use,
and maintenance of the unit to the customer according to the information in the
Operation Manual and perform the test run to ensure normal operation. Both the
Installation Manual and Operation Manual must be given to the user for keeping.
These manuals must be passed on to subsequent users.

: Indicates a part which must be grounded.

Warning:

Carefully read the labels affi xed to the main unit.

Caution:

• Make sure that the refrigerant pipes are well insulated to prevent condensa­tion.
Incomplete insulation may cause condensation on the surface of pipes,
wetting of the ceiling, fl oor and other important properties.

•

Do not use the unit in an unusual environment. If the air conditioner is in­stalled in areas exposed to steam, volatile oil (including machine oil), or sulfu­ric gas, areas exposed to high salt content such as the seaside, the perform­ance can be signifi cantly reduced and the internal parts can be damaged.

• Do not install the unit where combustible gases may leak, be produced,
fl ow, or accumulate. If combustible gas accumulates around the unit, fi re or
explosion may result.

• When installing the unit in a hospital or communications office, be pre­pared for noise and electronic interference. Inverters, home appliances,
high-frequency medical equipment, and radio communications equipment
can cause the air conditioner to malfunction or breakdown. The air con­ditioner may also affect medical equipment, disturbing medical care, and
communications equipment, harming the screen display quality.

•

Thermal insulation of the refrigerant pipe is necessary to prevent condensation.
If the refrigerant pipe is not properly insulated, condensation will be formed.

• Place thermal insulation on the pipes to prevent condensation. If the drain­pipe is installed incorrectly, water leakage and damage to the ceiling, fl oor,
furniture, or other possessions may result.

• Do not clean the air conditioner unit with water. Electric shock may result.

• Tighten all fl are nuts to specifi cation using a torque wrench. If tightened
too much, the fl are nut can break after an extended period.

• Be sure to install circuit breakers, if not installed, electric shock may result.

• For the power lines, use standard cables of suffi cient capacity. Otherwise,
a short circuit, overheating, or fi re may result.

• When installing the power lines, do not apply tension to the cables. If the
connections are loosened, the cables can snap or break and overheating or
fi re may result.

• Do not connect the ground wire to gas or water pipes, lighting rods, or
telephone grounding lines. If the unit is not properly grounded, electric
shock may result.

2. Selecting a location for installation

* The branch box is only for indoor use.
Please attach the special optional cover (PAC-AK350CVR-E) to install the
branch box in the outdoors.

• Ensure that the branch box is installed in a location which facilitates servicing
and maintenance. (ensure that the required maintenance hole or service space
is available).

• Do not install near bedrooms. The sound of refrigerant fl owing through
the piping may sometimes be audible.

• Ensure that it is located where noise in operation will not be a problem.

After power is supplied or after an operation stop for a while, a small
clicking noise may be heard from the inside of the branch box. The elec­tronic expansion valve is opening and closing. The unit is not faulty.

2

• Determine the route of refrigerant piping, and electrical wiring beforehand.

• Ensure that the location of the installation is such that the length of refrigerant
piping is within the specifi ed limits.

• Do not install in location that is hot or humid for long periods of time.

• Ensure that the branch box is installed above the ceiling of corridor, bath room,
etc., where persons are not regularly there (Avoid installing at around center of
the room.) for maintenance.

* Ensure that the unit is installed in a location able to support its weight.

Warning:
Ensure that the unit is installed fi rmly in a location able to support its weight.
If the installation is of insuffi cient strength the unit may fall, resulting in in-
jury.

3. Confi rming supplied accessories

3.1. Check the Branch Box accessories and parts

8

4371

56

29

Accessory name

Washer

1

(with insulation)
Washer 4 4

2

Pipe cover (Liquid) 1 1 TO OUTDOOR UNIT

3

Pipe cover (Gas) 1 1 TO OUTDOOR UNIT

4

Pipe cover (Liquid) 3 5 TO INDOOR UNITS

5

Pipe cover (Gas) 3 5 TO INDOOR UNITS

6

Joint cover (Liquid) 1 3

7

Joint cover (Gas) 1 3

8

Band 16 24

9

Fig. 3-1

4. Dimensions and required servicing space of Branch Box

Q’ty

PAC-

MK31BC

PAC-

MK51BC

44

Optional different-diameter (deformed) joints

A

B

Fig. 4-1

Model name

MAC-A454JP ø9.52 → ø12.7 ø9.52 ø12.7
MAC-A455JP ø12.7 → ø9.52 ø12.7 ø9.52
MAC-A456JP ø12.7 → ø15.88 ø12.7 ø15.88
PAC-493PI ø6.35 → ø9.52 ø6.35 ø9.52
PAC-SG76RJ-E ø9.52 → ø15.88 ø9.52 ø15.88

PAC-MK51BC (5-branches type)

Connected pipes diameter Diameter A Diameter B

mm mm mm

A

320

B

(mm)

* Please connect 2 indoor units or more with 1 system.
* Up to 2 branch boxes may be connected to 1 outdoor unit.
* Suspension bolt : W3/8 (M10)
* Refrigerant pipe fl ared connection

* The piping connection size differs according to the type and capacity of

indoor units. Match the piping connection size for indoor unit and branch
box. If the piping connection size of branch box does not match the pip­ing connection size of indoor unit, use optional different-diameter (de­formed) joints to the branch box side. (Connect deformed joint directly to
the branch box side.)

A Suspension bolt pitch
B To indoor unit
C To outdoor unit
D Service panel (for LEV, THERMISTOR)
E Electric cover
F Rubber bush
G Terminal block (to indoor unit on control board)
H Terminal block (to outdoor unit)
J Terminal block (for communication cable)
K Cable clamp
* Ensure that the branch box is installed as shown on the below drawing.

PAC-MK51BC (Fig.4-2)

Suspension bolt: W3/8 (M10)
Refrigerant pipe fl ared connection

ABCDE
ø6.35 ø6.35 ø6.35 ø6.35 ø6.35 ø9.52
ø9.52 ø9.52 ø9.52 ø9.52 ø12.7 ø15.88

402

A

Liquid pipe

Gas pipe

mm

To outdoor unit

170

93

4765

EDCBA

EDCBA

25

25

24

12

C

Conversion formula

96450

81

102

90

7087

40278

J

G

1/4 F ø6.35
3/8 F ø9.52
1/2 F ø12.7
5/8 F ø15.88
3/4 F ø19.05

25

25

25

70707070

DK

FE

H

Fig. 4-2

3

4. Dimensions and required servicing space of Branch Box

PAC-MK31BC (3-branches type) PAC-MK31BC (Fig.4-3)

A

320

(mm)

Suspension bolt: W3/8 (M10)
Refrigerant pipe fl ared connection

ABC

170

Liquid pipe

Gas pipe

A

B

C

450

233

4765

CBA

CBA

25

25

25

96

81

7070

102

90

278 40

87 70

DK

Fig. 4-3

402

24

12

J

E

F

H

4.1. The direction of the piping can be changed. (Fig.

ø6.35 ø6.35 ø6.35 ø9.52
ø9.52 ø9.52 ø9.52 ø15.88

G

4-4). [Work Procedures] (Fig. 4-5)

1 Remove the screws in each part.

To outdoor unit

mm

Fig. 4-4

2 Remove the electric cover, service panel, and top panel.

Electric cover

A

Service panel

B

Top panel

C

A

B

C

3 Install the top panel on the opposite surface.

Top panel

C

C

4

4. Dimensions and required servicing space of Branch Box

4 Fasten the screws in each part.

6 Fasten the screws.

5 Install the service panel on the opposite surface.

Service panel

B

B

7 Install the electric cover on the opposite surface.

Electric cover

A

A

8 Fasten the screws.

Fig. 4-5

5