Mitsubishi PLFY-P-NBMU-E2 Installation Manual

Air-Conditioners For Building Application INDOOR UNIT

PLFY-P·NBMU-E2

English

INSTALLATION MANUAL

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

FOR INSTALLER

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.

POUR L’INSTALLATEUR

Français

MANUAL DE INSTALACIÓN

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

PARA EL INSTALADOR

Español

2.1. Check the indoor unit accessories (Fig. 2-1)

The indoor unit should be supplied with the following accessories.

Accessory name Q’ty

Installation template 1 Washers (with insulation) Washers (without insulation)

4 Pipe cover (for refrigerant piping joint) small diameter large diameter

1 Band (large) Band (small)

2 Screw with washer (M5 × 25) for mounting grille 4 Drain socket 1 Insulation 1

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

tions”.

Please report to your supply authority or obtain their consent before

connecting this equipment to the power supply system.

1. Safety precautions

2. Installing the indoor unit

Fig. 2-1

Contents

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

2. Installing the indoor unit ............................................................................2

3. Refrigerant pipe and drain pipe ................................................................. 4

4. Electrical work ...........................................................................................6

5. Installing the grille ......................................................................................9

6. Test run .................................................................................................... 11

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

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 an action that must be avoided.

: Indicates that important instructions must be followed.

: Indicates a part which must be grounded.

: Indicates that caution should be taken with rotating parts.

: Indicates that the main switch must be turned off before servicing.

: Beware of electric shock.

: Beware of hot surface.

ELV

: At servicing, please shut down the power supply for both the Indoor and

Outdoor Unit.

Warning:

Carefully read the labels afﬁ xed to the main unit.

Caution: Appliances not accessible to the general public. Install the indoor unit at least 2.4 m (94-1/2 inch) above ﬂ oor or grade level.

Warning:

• Ask the dealer or an authorized technician to install the air conditioner.

• Install the unit at a place that can withstand its weight.

• Use the speciﬁ ed cables for wiring.

• Use only accessories authorized by Mitsubishi Electric and ask the dealer or an authorized technician to install them.

• Do not touch the heat exchanger ﬁ ns.

• Install the air conditioner according to this Installation Manual.

• Have all electric work done by a licensed electrician according to local regulations.

• If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit even if the refrigerant should leak.

Caution:

• Do not use the existing refrigerant piping, when use R410A or R407C refrigerant.

•

Use ester oil, either oil or alkylbenzene (small amount) as the refrigerator oil to coat ﬂ ares and ﬂ ange connections, when use R410A or R407C refrigerant.

• Do not use the air conditioner where food, pets, plants, precision instruments, or artwork are kept.

• Do not use the air conditioner in special environments.

• Ground the unit.

• Install an leak circuit breaker, as required.

• Use power line cables of sufﬁ cient current carrying capacity and rating.

• Use only a circuit breaker and fuse of the speciﬁ ed capacity.

• Do not touch the switches with wet ﬁ ngers.

• Do not touch the refrigerant pipes during and immediately after operation.

• Do not operate the air conditioner with the panels and guards removed.

• Do not turn off the power immediately after stopping operation.

4 5

6 7

• The cut face punched parts may cause injury by cut, etc. The installers are requested to wear protective equipment such as gloves, etc.

• 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.

Note: The phrase “Simple MA Remote controller” in this installation manual refers to the PAC-YT53CRAU. 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 box.

H Use inserts rated at 100-150kg, 221-331 Ibs each

(procure locally)

Fig. 2-2

5-29/32

6-5/16

3-17/32

32-27/32 to 35-13/16 C

25/32 to

1-25/32

(5/16)

25/32 to 1-25/32 25/32 to 1-25/32

25/32 to

1-25/32

31-7/8 B

37-3/8 D

33-1/16 A

7-3/8

33-1/16 A

5-5/16

11/ 16

+3/16

11/ 16

+3/16

1-15/16 to

35-13/16

4/1/8

1-3/8

Min. 98-7/16

Min. 19-11/16

23-13/16 B

-3/16

+1-3/8

33-27/32 to 35-13/16 C

37-3/8 D

24-13/32

Fig. 2-3

Fig. 2-4

23-13/16

31-57/

A Unit B Grille C Pillar

D Ceiling E Rafter F Beam G Roof beam

I Suspension bolts M10 (3/8") (procure locally) J Steel reinforcing rod

13-25/32

3-17/32

70°

3-15/16 3-15/16 3-17/32

3-15/16

5-1/8

*6-3/32

*6-9/16

*6-7/32

120°

2. Installing the indoor unit

2.2. Ceiling openings and suspension bolt installation

locations (Fig. 2-2)

Caution:

Install the indoor unit at least 2.4m (94-1/2 inch) above ﬂ oor or grade level.

• 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 is 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 Fig.2-2; 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 E Grille

Bolt pitch F Ceiling

Ceiling opening G Multi function casement (option)

Outer side of Grille H Entire periphery

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

15 mm, 25/64 to 19/32 inch.

* When the optional multi-functional casement is installed, add 135mm, 5-5/16 to the dimen-

sions marked on the ﬁ gure.

(mm, inch)

Models C D

P08, P12, P15, P18 241, 9-1/2 258, 10-3/16

P24, P30, P36 281, 11-1/16 298, 11-3/4

2.3. Branch duct hole and fresh air intake hole (Fig. 2-3)

At the time of installation, use the duct holes (cut out) located at the positions shown in Fig.2-3, as and when required.

• A fresh air intake hole for the optional multi function casement can also be made.

Note: The ﬁ gure marked with * in the drawing represent the dimensions of the main unit excluding those of the optional multi function casement. * When installing the optional multi function casement, add 135 mm, 5-5/16

inch to the dimensions marked on the ﬁ gure. When installing the branch ducts, be sure to insulate adequately. Otherwise condensation and dripping may occur. When installing the fresh air intake hole, be sure to remove the insulator

that is pasted on the indoor unit.

Branch duct hole

ø150 mm, ø5-29/32 inch cut out hole

Indoor unit

ø175 mm, ø6-7/8 burring hole pitch

Fresh air intake hole

Fresh air intake hole diagram

Drain pipe

3-ø2.8 mm, ø1/8 inch burring hole

Refrigerant pipe

ø125 mm, ø4-29/32 inch burring hole pitch

Branch duct hole diagram

(view from either side)

ø100 mm, ø3-15/16 inch cut out hole

Ceiling

14-ø2.8 mm, ø1/8 inch burring hole

Detailed ﬁ gure of removing the insulator

Insulator

2.4. Suspension structure (Give site of suspension

strong structure) (Fig. 2-4)

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

constructors and interior decorators should be consulted for details.

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

the ceiling foundation (framework: wooden slats and slat holders) must be rein-

forced in order to protect the ceiling from vibration. (2) Cut and remove the ceiling foundation. (3) Reinforce the ends of the ceiling foundation where it has been cut and add ceil-

ing foundation for securing the ends of the ceiling board. (4) When installing the indoor unit on a slanted ceiling, attach a pillar between the

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

Wooden structures

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

as reinforcing members.

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

must be at least 6 cm, 2-3/8 inch long if the beams are separated by not more than 90 cm, 35-7/16 inch and their sides must be at least 9 cm, 3-9/16 inch long if the beams are separated by as much as 180 cm, 70-7/18 inch. The size of the suspension bolts should be ø10 (3/8"). (The bolts do not come with the unit.)

Ferro-concrete structures

• Secure the suspension bolts using the method shown, or use steel or wooden

hangers, etc. to install the suspension bolts.

(inch)

11/16

4-1/8

(

9-29/64

)

3/16

Min. 1-3/16

A=11/16

+3/16

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Suspension bolt

Ceiling

Nut

Washer (with insulation)

Mounting plate

Washer (without insulation)

Check using the Installation gauge

Main unit

Ceiling

Installation template (top of the

package)

Screw with washer (Accessory)

Main unit

Ceiling

Gauge

Ceiling opening dimensions

Fig. 2-5

Fig. 2-6

Fig. 2-7

2. Installing the indoor unit

Fig. 3-1

90 0.5

øA

R1/64 to R1/32

45 2

Fig. 3-2

2.5. Unit suspension procedures (Fig. 2-5)

Suspend the main unit as shown in the diagram. Figures given in parentheses represent the dimensions in case of installing optional multi function casement.

1. In advance, set the parts onto the suspension bolts in the order of the washers (with insulation), washers (without insulation) and nuts (double).

• 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

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

2. Lift the unit to the proper height of the suspension bolts to insert the mounting plate between washers and then fasten it securely.

3. When the main unit can not be aligned against the mounting hole on the ceiling, it is adjustable owing to a slot provided on the mounting plate.

• Make sure that A is performed within 17-22 mm, 11/16-7/8 inch. Damage could

result by failing to adhere to this range. (Fig. 2-6)

Caution: Use the top half of the box as a protective cover to prevent dust or debris from getting inside the unit prior to installation of the decorative cover or when applying ceiling materials.

2.6. Conﬁ rming the position of main unit and tighten-

ing the suspension bolts (Fig. 2-7)

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

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.

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

ﬁ lled with water.

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

bolts securely to fasten the main unit.

• The installation template (top of the package) can be used as a protective sheet to

prevent dust from 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 n- ished.

* As for the details of ﬁ tting, refer to the instructions given on the Installation tem-

plate.

3. Refrigerant pipe and drain pipe

(mm, inch)

Models A P08, P12, P15, P18 80, 3-5/32 P24, P30, P36 85, 3-11/32

74, 2-29/32

77, 3-1/32

15/16

3-17/32

6-11/16

5-1/12

7-15/32

2-3/8

11-3/16 14-27/32

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3.1. Refrigerant and drainage piping locations of indoor unit

The ﬁ gure marked with * in the drawing represent the dimensions of the main unit excluding those of the optional multi function casement. (Fig. 3-1)

Drain pipe

Ceiling

Grille

Refrigerant pipe (liquid)

Refrigerant pipe (gas)

Water supply inlet

Main unit

When the optional multi-functional casement is installed, add 135 mm, 5-5/16

inch to the dimensions marked on the ﬁ gure.

3.2. Connecting pipes (Fig. 3-2)

• When commercially available copper pipes are used, wrap liquid and gas pipes

with commercially available insulation materials (heat-resistant to 100 °C, 212 °F or more, thickness of 12 mm, 1/2 inch or more).

• The indoor parts of the drain pipe should be wrapped with polyethylene foam

insulation materials (speciﬁ c gravity of 0.03, thickness of 9 mm, 23/64 inch or more).

• Apply thin layer of refrigerant oil to pipe and joint seating surface before tighten-

ing ﬂ are nut.

• Use two wrenches to tighten piping connections.

• Use refrigerant piping insulation provided to insulate indoor unit connections. In-

sulate carefully.

Flare cutting dimensions

Copper pipe O.D.

(mm, inch)

Flare dimensions

øA dimensions (mm, inch) ø6.35, 1/4" 8.7 - 9.1, 11/32-23/64 ø9.52, 3/8" 12.8 - 13.2, 1/2-33/64 ø12.7, 1/2" 16.2 - 16.6, 41/64-21/32

ø15.88, 5/8" 19.3 - 19.7, 49/64-25/32 ø19.05, 3/4" 22.9 - 23.3, 15/16-61/64

3.3. Indoor unit (Fig. 3-3)

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, 25/32 inch from the ends of the pipe cover.)

• After connecting the refrigerant piping to the indoor unit, be sure to test the pipe connections for gas leakage with nitrogen gas. (Check that there is no refrigerant leakage from the refrigerant piping to the indoor unit.)

Fig. 3-3

3. Refrigerant pipe and drain pipe

3.4. Drainage piping work (Fig. 3-4)

• Use VP25 (O.D. ø32 mm, 1-1/4 inch 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.

Correct piping

Wrong piping

Insulation (9 mm, 23/64 inch or more)

Downward slope (1/100 or more)

Support metal

Air bleeder

Raised

Odor trap

Grouped piping

O. D. ø32 mm, 1-1/4 inch PVC TUBE

Make it as large as possible

Indoor unit

Make the piping size large for grouped piping.

Downward slope (1/100 or more)

O. D. ø38 mm, 1-1/2 inch PVC TUBE for grouped piping.

(9 mm or more insulation)

Up to 850 mm, 33-7/16 inch

1. Connect the drain socket (supplied with the unit) to the drain port. (Fig. 3-5)

(Fix the tube using PVC adhesive then secure it with a band.)

2. Install a locally purchased drain pipe (PVC pipe, O.D. ø32 mm, 1-1/4 inch).

(Fix the pipe using PVC adhesive then secure it with a band.)

3. Insulate the tube and pipe. (PVC pipe, O.D. ø32 mm, 1-1/4 inch 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.)

Unit

Insulating material

Band (large)

Drain port (transparent)

Insertion margin

Matching

Drain pipe (O.D. ø32 mm, 1-1/4 inch PVC TUBE)

Insulating material (purchased locally)

Transparent PVC pipe

O.D. ø32 mm, 1-1/4 inch PVC TUBE (Slope 1/100 or more)

Band (small)

Drain socket

7/16

111

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



Max. 65 ft

5 to 7 ft

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Max. 6 inch

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

Fig. 3-4

Fig. 3-5

(inch)

Refrigerant pipe sizes & Flare nut tightening torque

Apply refrigerating machine oil over the entire ﬂ are seat surface.

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Refrigerant pipe and

insulating material

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Pipe cover (large)

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Pipe cover (small)

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Refrigerant pipe (gas)

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Refrigerant pipe (liquid)

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Band



Cross-sectional view of connection

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Pipe

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Insulating material

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Squeeze

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Liquid pipe Gas pipe Flare nut O.D.

Pipe size

(mm) (inch)

Tightening

torque (N.m)

(ft. Ibs)

Pipe size

(mm)

(inch)

Tightening

torque (N.m)

(ft. Ibs)

Liquid pipe

(mm) (inch)

Gas pipe

(mm) (inch)

P08, P12, P15, P18

ODø6.35

1/4"

14 - 18 10 - 13

ODø12.7

1/2"

49 - 61 35 - 44

43/64

1-1/32

P24, P30, P36

ODø9.52

3/8"

34 - 42 25 - 30

ODø15.88

5/8"

68 - 82 49 - 59

7/8

1-9/64

4. Electrical work

4.1. Indoor unit (Fig. 4-1)

1. Remove the electrical wiring service panel.

2. Remove the electrical box cover.

3. Remove the MA Remote controller terminal cover.

4. Wire the power cable and control cable separately through the respective wiring entries given in the diagram.

• Do not allow slackening of the terminal screws.

• Leave excess cable so that the electrical box cover can be suspended below the

unit during servicing. (Approx. 50 to 100 mm, 2 to 4 inch)

Entry for remote controller cable

Entry for power and control cable

Clamp

Electrical box cover

Service panel for electrical wiring

Temporary hook for electrical box cover

MA Remote controller terminal cover

Power supply terminals (with earth terminal) (L1, L2, GR)

Transmission terminals (M1,M2,S)

MA Remote controller terminal (1,2)

Secure with the clamp

Fig. 4-1

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TB2 TB5 TB15

S12

L1L2GR

~230V

Total operating current of the indoor unit

Minimum wire thickness (mm²/AWG) Breaker for wiring

(NFB)

Ground-fault interrupter *1

Main cable Branch Ground Capacity Fuse F0 = 15A or less *2 2.1/14 2.1/14 2.1/14 15 15 15 15A current sensitivity *3 F0 = 20A or less *2 3.3/12 3.3/12 3.3/12 20 20 20 20A current sensitivity *3 F0 = 30A or less *2 5.3/10 5.3/10 5.3/10 30 30 30 30A current sensitivity *3

Apply to IEC61000-3-3 about max. permissive system impedance. *1 The Ground-fault interrupter should support inverter circuit.

The Ground-fault interrupter should combine using of local switch or wiring breaker. *2 Please take the larger of F1 or F2 as the value for F0. F1 = Total operating maximum current of the indoor units × 1.2 F2 = {V1 × (Quantity of Type1)/C} + {V1 × (Quantity of Type2)/C} + {V1 × (Quantity of Type3)/C} + {V1 × (Quantity of Others)/C}

Indoor unit V1 V2 Type 1 PLFY-NBMU, PMFY-NBMU, PEFY-NMSU,

PCFY-NKMU, PKFY-NHMU, PKFY-NKMU

18.6 2.4

Type 2 PEFY-NMAU 38 1.6 Type 3 PEFY-NMHSU 13.8 4.8 Others Other indoor unit 0 0

C : Multiple of tripping current at tripping time 0.01s Please pick up "C" from the tripping characteristic of the breaker.

4.2. Power supply wiring

• Install an earth line longer than other cables.

• Power supply codes of appliance shall not be lighter than design 245IEC57 or 227IEC57, 245 IEC 53 or 227 IEC 53.

• A switch with at least 3 mm, 1/8 inch contact separation in each pole shall be provided by the air conditioner installation.

[Fig. 4-2]

Ground-fault interrupter

Local switch/Wiring breaker

Indoor unit

Pull box

Fig. 4-2

CCCCC

~230V

4.3. Types of control cables

1. Wiring transmission cables

Types of transmission cable Shielding wire CVVS or CPEVS

Cable diameter More than 1.25 mm² (AWG16)

Length Less than 200m (656 ft)

2. M-NET Remote control cables

Types of remote control cable Shielding wire MVVS

Cable diameter 0.5 (AWG20) to 1.25 mm² (AWG16)

Length

Add any portion in excess of 10m to within the longest allowable transmission cable length 200m (656 ft)

3. MA Remote control cables

Types of remote control cable 2-core cable (unshielded)

Cable diameter 0.3 (AWG22) to 1.25 mm² (AWG16)

Length Less than 200m (656 ft)

<Example of "F2" calculation> *Condition PEFY-NMSU × 4 + PEFY-NMAU × 1, C = 8 (refer to right sample chart)

F2 = 18.6 × 4/8 + 38 × 1/8

= 14.05 → 16A breaker (Tripping current = 8 × 16A at 0.01s)

*3 Current sensitivity is calculated using the following formula. G1 = V2 × (Quantity of Type1) + V2 × (Quantity of Type2) + V2 × (Quantity of Type3) + V2 × (Quantity of Others) + V3 × (Wire length[km])

G1 Current sensitivity

30 or less 30 mA 0.1sec or less

100 or less 100 mA 0.1sec or less

Wire thickness (mm

/AWG) V3

2.1/14 48

3.3/12 56

5.3/10 66

6000

600

Tripping Time [s]

0.1

0.01 12

Rated Tripping current (x)

34 68C10 20

SAMPLE

Sample chart

Fig. 4-3

TB5 TB15 TB5 TB15

SM1M2 SM1 M2

TB3

M1M2 2121

TB5 TB5

SM1M2 SM1 M2

TB3

M1M2

TB5

CN90

Pair No.

CN90

TB15 TB5 TB15

SM1M2 SM1M2

TB3

M1M2 2121

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 

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4.4. Connecting remote controller, indoor and outdoor transmission cables (Fig. 4-3)

• Connect indoor unit TB5 and outdoor unit TB3. (Non-polarized 2-wire)

The “S” on indoor unit TB5 is a shielding wire connection. For specifications

about the connecting cables, refer to the outdoor unit installation manual.

• Install a remote controller following the manual supplied with the remote control-

ler.

• Connect the remote controller’s transmission cable within 10 m, 33 ft using a

0.75 mm

core cable. If the distance is more than 10 m, 33 ft, use a 1.25 mm2

junction cable.

MA Remote controller

• Connect the “1” and “2” on indoor unit TB15 to a MA remote controller. (Non-

polarized 2-wire)

• DC 9 to 13 V between 1 and 2 (MA remote controller)

M-NET Remote controller

• Connect the “M1” and “M2” on indoor unit TB5 to a M-NET remote controller.

(Non-polarized 2-wire)

• DC 24 to 30 V between M1 and M2 (M-NET remote controller)

Wireless remote controller(When installing wireless signal receiver)

• Connect the wire of wireless signal receiver (9-pole cable) to CN90 of indoor con-

troller board.

• When more than two units are run under group control using wireless remote

controller, connect TB15 each with the same number.

• To change Pair No. setting, refer to installation manual attached to wireless re-

mote controller. (In the default setting of indoor unit and wireless remote controller, Pair No. is 0.)

Terminal block for indoor transmission cable

Terminal block for outdoor transmission cable (M1(A), M2(B), (S))

Remote controller

wireless signal receiver

wireless remote controller

4. Electrical work

4.5. Setting addresses (Fig. 4-4)

(Be sure to operate with the main power turned OFF.)

• There are 2 types of rotary switch setting available: setting addresses 1 to 9 and over 10, and setting branch numbers.

How to set addresses

Example: If Address is “3”, remain SW12 (for over 10) at “0”, and match SW11(for 1 to 9) with “3”.

How to set branch numbers SW14 (Series R2 only) Match the indoor unit’s refrigerant pipe with the BC controller’s end connection number. Remain other than series R2 at “0”.

• The rotary switches are all set to “0” when shipped from the factory. These

switches can be used to set unit addresses and branch numbers at will.

• The determination of indoor unit addresses varies with the system at site. Set

them referring to the Data Book.

Address board

Fig. 4-4

4. Electrical work

4.6. Switch setting for high ceiling or at the time of changing the number of air outlets (Fig. 4-4)

With this unit, the air ﬂ ow rate and fan speed can be adjusted by setting the SWA and SWB (slide switch). Select a suitable setting from the table below according to the installation location.

* Make sure the SWA and SWB switch are set, otherwise problems such as not

getting cool/warm may occur.

PLFY-P08-P30NBMU-E2

SWA

SWB

123

Silent Standard High ceiling

4 direction 2.5 m, 8.2 ft 2.7 m, 8.9 ft 3.5 m, 11.5 ft

3 direction 2.7 m, 8.9 ft 3.0 m, 9.8 ft 3.5 m, 11.5 ft

2 direction 3.0 m, 9.8 ft 3.3 m, 10.8 ft 3.5 m, 11.5 ft

4.7. Sensing room temperature with the built-in sensor in a remote controller (Fig.4-4)

If you want to sense room temperature with the built-in sensor in a remote controller, set SW1-1 on the control board to “ON”. The setting of SW1-7 and SW1-8 as necessary also makes it possible to adjust the air ﬂ ow at a time when the heating thermometer is OFF.

PLFY-P36NBMU-E2

SWA

SWB

123

Silent Standard High ceiling

4 direction 2.7 m, 8.9 ft 3.2 m, 10.5 ft 4.5 m, 14.8 ft

3 direction 3.0 m, 9.8 ft 3.6 m, 11.8 ft 4.5 m, 14.8 ft

2 direction 3.3 m, 10.8 ft 4.0 m, 13.1 ft 4.5 m, 14.8 ft



SW14

SW11

SW12

12345678910

ON OFF

SW1

SWC

CN82

CN43

3 2

SWA

ADDRESS

(10ths DIGIT)

(1s DIGIT)

(BRANCH No.)

2 3

SWB

4.8. Electrical characteristics

Model

Power supply IFM

Hz Volts Voltage range MCA (A) Output (kw) FLA (A)

PLFY-P08,P12,P15,P18NBMU-E2

60Hz 208 / 230V 198 to 253V

0.36 / 0.36

0.050 / 0.050

0.29 / 0.29 PLFY-P24,P30NBMU-E2 0.61 / 0.61 0.49 / 0.49 PLFY-P36NBMU-E2 1.25 / 1.25 0.120 / 0.120 1.00 / 1.00

Symbols: MCA: Max. Circuit Amps (= 1.25×FLA) FLA: Full Load Amps

IFM: Indoor Fan Motor Output: Fan motor rated output

5.1. Checking the contents (Fig. 5-1)

• This kit contains this manual and the following parts.

Accessory name Q’ty Remark

Grille 1

950 × 950 (mm), 37-3/8 × 37-3/8 (inch)

Screw with captive washer 4 M5 × 0.8 × 25

Gauge 1 (Divided into four parts)

Fastener 3

Screw 4 4 × 8

Screw 1 4 × 12

5.2. Preparing to attach the grille (Fig. 5-2)

• With the gauge 3 supplied with this kit, adjust and check the positioning of the unit relative to the ceiling. If the unit is not properly positioned relative to the ceiling, it may allow air leaks or cause condensation to collect.

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

860 × 860 - 910 × 910, 33-7/8 × 33-7/8 to 35-13/16 × 35-13/16 inch

• Make sure that A is performed within 17-22 mm, 11/16-7/8 inch. Damage could result by failing to adhere to this range.

Main unit

Ceiling

Gauge 3 (inserted into the unit)

Ceiling opening dimensions

5.2.1. Removing the intake grille (Fig. 5-3)

• 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

5.2.2. Removing the corner panel (Fig. 5-4)

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

to remove the corner panel.

[Fig.5-3, 5-4]

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

Detail

5.3. Selection of the air outlets

For this grille the discharge direction is available in 11 patterns. Also, by setting the remote controller to the appropriate settings, you can adjust the air-ﬂ ow and speed. Select the required settings from the Table 1 according to the location in which you want to install the unit.

1) Decide on the discharge direction pattern.

2) Be sure to set the remote contoller to the appropriate settings, according to the

number of air outlets and the height of the ceiling on which the unit will be installed.

Note: For 3 and 2-directional, please use the air outlet shutter plate (option).

5.4. Installing the grille

5.4.1. Preparations (Fig. 5-5)

• Install the two enclosed screws with washer 2 in the main unit (at the corner drain pipe area and at the opposite corner) as shown in the diagram.

5. Installing the grille

Fig. 5-5

19/32 to

25/32

4-directional 3-directional

1 pattern: 4 patterns:

Initial setting 1 air outlet fully closed

2-directional

6 patterns: 2 air outlet fully closed

Blowout

direction

patterns

Blowout

direction

patterns

Fig. 5-1

Fig. 5-2

A=11/16

+3/16

Fig. 5-3

Fig. 5-4

Main unit Screw with

captive washer









































 





Table 1





(inch)

5. Installing the grille

Main unit Corner drain pipe area Screw with washer (for temporary use) Grille Screw with washer Socket Bell shaped hole

Fig. 5-6

Ceiling Main unit Grille Make sure that there are no gaps Adjust the nut of the

main unit using a wrench, etc.

Fig. 5-7

Fig. 5-8

Clamp of the main unit Electrical box Indoor controler board Catch for bell mouth Lead wire of grille

Fig. 5-9

Button Vane motor Up/down vanes Connector

Screw (4×8) 5　 Corner panel Safety wire

Fig. 5-10

(Enlarged)

A C D E F G H

A B C D E

A B C D

A B C

5.4.2. Temporary installation of the grille (Fig. 5-6)

• Temporarily secure the grille using the bell shaped holes by putting the socket of the grille marked

on the corner drain pipe area of the main unit.

* Make sure that the lead wiring of the grille does not get pinched between the

grille and the main unit.

5.4.3. Securing the grille (Fig. 5-7)

• Secure the grille to the main unit by tightening the previously installed two screws (with captive washer) as well as the two remaining screws (with captive washer).

* Make sure that there are no gaps between the main unit and the grille or the

grille and the ceiling.

Fixing gaps between the grille and the ceiling

With the grille attached, adjust the height of the main unit to close the gap.

Caution:

When tightening the screw with captive washer 2, tighten it at a torque of

4.8 N·m (3.5 ft·lbs) or less. Never use an impact screwdriver.

• It may result in parts damage.

5.4.4. Wire connection (Fig. 5-8)

• Remove the 2 screws fixing the cover of electrical branch box of the unit and open the cover.

• Be sure to connect the connector (white, 20-pole) for vane motor of the grille to CNV connector of contoller board of the unit.

The lead wire of grille is passed through the catch for bell mouth of the unit perfectly. The remaining lead wire is tied with clamp of the unit and put the cover of the unit again with 2 screws.

Note: Do not put the remaining lead wire in electrical branch box of the unit.

5.5. Locking the up/down airﬂ ow direction (Fig. 5-9)

The vanes of the unit can be set and locked in up or down orientations depending upon the environment of use.

• Set according to the preference of the customer.

The operation of the fixed up/down vanes and all automatic controls cannot

be performed using the remote controller. In addition, the actual position of the vanes may differ from the position indicated on the remote controller.

Turn off the main power switch.

Injuries or an electrical shock may occur while the fan of the unit is rotating.

Disconnect the connector for the vane motor of the vent that you want to lock.

(While pressing the button, remove the connector in the direction indicated by

the arrow as shown in the diagram.) After removing the connector, insulate it with tape.

It also can be set by remote controller. Refer to 4.7.

5.6. Check

• Make sure that there is no gap between the unit and the grille, or between the grille and the surface of the ceiling. If there is any gap between the unit and the grille, or between the grille and the surface of the ceiling, it may cause dew to collect.

• Make sure that the wires have been securely connected.

5.7. Installing the intake grille (Fig. 5-10 )

Note: When reinstalling the corner panels (each with a safety wire attached), connect the other end of each safety wire to the grille using a screw (4 pcs, 4 × 8) as shown in the illustration.

*If the corner panels are not attached, they may fall off while the unit is operating.

• Perform the procedure that is described in “5.2. Preparing to attach the grille” in reverse order to install the intake grille and the corner panel.

• Multiple units can be installed with grille so that the position of the logo on each corner panel is consistent with the other units regardless of the orientation of the intake grille. Align the logo on the panel according to the wishes of the customer as shown in the diagram on the left. (The position of the grille can be changed.)

Refrigerant piping of the main unit

Drain piping of the main unit

Initial position of the corner panel (logo attached).

* Installation in any position is possible.

Initial position of the levers on the intake grille.

* Although the clips can be installed in any of 4 positions, the conﬁ guration shown here is recommended. (It is not necessary to remove the intake grille when maintenance is performed on the electric component box of the main unit.)

+ 22 hidden pages

Mitsubishi PLFY-P-NBMU-E2 Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual