Mitsubishi Electric CITY MULTI PLFY-P-NBMU-E Installation Manual

Air-Conditioners For Building Application INDOOR UNIT

PLFY-P·NBMU-E

INSTALLATION MANUAL

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

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.

MANUAL DE INSTALACIÓN

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

FOR INSTALLER

English

POUR L’INSTALLATEUR

Français

PARA EL INSTALADOR

Español

Contents

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

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

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

Note: The phrase “Wired remote controller” in this installation manual refers to the PAR-21MAA. 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.

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

5. Installing the grille ....................................................................................12

6. Test run (Fig. 6-1) ....................................................................................14

1. Safety precautions

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.

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.

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.

: 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.

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

ELV

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.

• 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.

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.

2. Installing the indoor unit

• 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.

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) Pipe cover (for refrigerant piping joint) small diameter

large diameter Band (large)

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

Drain socket 1

Insulation 1

4 4

1 1 6 2

Fig. 2-1

2. Installing the indoor unit

25/32 to

1-25/32

24-13/32

33-27/32 to 35-13/16 

25/32 to

1-25/32

1-3/8

(inch)

37-3/8 

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

6-5/16

33-1/16 

5-29/32

3-17/32



5-5/16

+3/16





11/ 16

37-3/8 

32-27/32 to 35-13/16 

31-7/8 

6-5/16

7-3/8

33-1/16 



Min. 98-7/16

6-5/16

1-15/16 to

35-13/16



Min. 19-11/16

-3/16

6-5/16

4/1/8

(5/16)

+1-3/8

23-13/16 

(5/16)

+3/16

11/ 16



Fig. 2-2















70°



3-17/32

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

13-25/32



5-1/8

3-15/16

*6-3/32

*6-9/16

*6-7/32





(inch)





120°

Fig. 2-3





 Unit  Grille  Pillar













 Ceiling  Rafter  Beam  Roof beam

23-13/16

31-57/64



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

(procure locally)

 Suspension bolts M10 (3/8") (procure locally)  Steel reinforcing rod



(inch)



Fig. 2-4

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

C 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

P12, P15, P18, P24, P30 241, 9-1/2 258, 10-3/16

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

Indoor unit

Fresh air intake hole

Drain pipe

Refrigerant pipe

Branch duct hole diagram

(view from either side)

14-ø2.8 mm, ø1/8 inch burring hole

ø150 mm, ø5-29/32 inch cut out hole

ø175 mm, ø6-7/8 burring hole pitch

Fresh air intake hole diagram

3-ø2.8 mm, ø1/8 inch burring hole

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

ø100 mm, ø3-15/16 inch cut out hole

Ceiling

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.

2. Installing the indoor unit













3/16 +





11/16



Fig. 2-5





Min. 1-3/16

)

9-29/64

(

4-1/8



Fig. 2-7

+3/16

A=11/16



Suspension bolt

Ceiling

Nut

Washer (with insulation)

Mounting plate

Washer (without insulation)

Check using the Installation gauge







Main unit

Ceiling

Gauge

Ceiling opening dimensions



Fig. 2-6

Main unit

Ceiling

Installation template (top of the

package)

Screw with washer (Accessory)

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

3-17/32

6-11/16





5-1/12

90 0.5



2-3/8

11-3/16 14-27/32

45 2

øA

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

R1/64 to R1/32

15/16





7-15/32



Models A

Fig. 3-1

Fig. 3-2

(mm, inch)

74, 2-29/32

77, 3-1/32

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) 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

Flare dimensions

øA dimensions (mm, inch)

3. Refrigerant pipe and drain pipe

Refrigerant pipe sizes & Flare nut tightening torque

Liquid pipe Gas pipe Liquid pipe Gas pipe

P12, P15

P18

P24, P30

P36

Pipe size

(mm)

(inch)

ODø6.35

1/4"

ODø9.52

3/8"

ODø9.52

3/8"

ODø9.52

3/8"

Tightening

torque (N.m)

* Connect the joint with the following pipes: Liquid and gas pipes of P18, gas pipe of P36.



















Max. 65 ft

5 to 7 ft

















7/16

111

 















R22 R410A

Pipe size

(ft. Ibs)



ODø12.7

ODø15.88

ODø19.05



14 - 18 10 - 13

14 - 18*

10 - 13

34 - 42 25 - 30



Fig. 3-3











Fig. 3-4

(inch)







Fig. 3-5

(mm) (inch)

1/2"

5/8"

3/4"



Refrigerant pipe and

insulating material



Pipe cover (large)



Pipe cover (small)



Refrigerant pipe (gas)



Refrigerant pipe (liquid)

  

Pipe



Insulating material



Max. 6 inch

Tightening

torque (N.m)

(ft. Ibs)

49 - 61 35 - 44

49 - 61*

35 - 44

68 - 82 49 - 59

68 - 82*

49 - 59

Band Cross-sectional view of connection

Squeeze











,



Flare nut O.D.

Pipe size

(mm) (inch)

ODø6.35

1/4"

ODø6.35

1/4"

ODø9.52

3/8"

ODø9.52

3/8"

Tightening

torque (N.m)

(ft. Ibs)

14 - 18 10 - 13

34 - 42 25 - 30

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

Pipe size

(mm) (inch)

ODø12.7

1/2"

ODø12.7

1/2"

ODø15.88

5/8"

ODø15.88

5/8"

Tightening

torque (N.m)

(ft. Ibs)

49 - 61 35 - 44

68 - 82 49 - 59

Liquid pipe

(mm) (inch)

43/64

7/8

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.)

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

Gas pipe

(mm)

(inch)

1-1/32

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

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. 4-1

S12

~230V

CCCCC

L1L2GR

TB2 TB5 TB15

Fig. 4-2

Total operating current of the indoor unit

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 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.

Main cable Branch Ground Capacity Fuse

Minimum wire thickness (mm²/AWG) Breaker for wiring

(NFB)

18.6 2.4

Ground-fault interrupter *1

4. Electrical work

<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

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

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)

Sample chart

6000

600

Tripping Time [s]

0.1

0.01 12

Rated Tripping current (x)

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

SAMPLE

34 68C10 20



 

M1M2 2121

TB3

SM1M2 SM1 M2

TB5 TB15 TB5 TB15







M1M2 2121

TB3



TB3

M1M2

SM1M2 SM1 M2

TB5 TB5



 

CN90

Pair No.

SM1M2 SM1M2

TB5



Pair No.



Fig. 4-3

CN90

Pair No.

TB15 TB5 TB15



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

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

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

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

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

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

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

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

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

0.75 mm junction cable.

MA Remote controller

polarized 2-wire)

M-NET Remote controller

(Non-polarized 2-wire)

Wireless remote controller(When installing wireless signal receiver)

troller board.

controller, connect TB15 each with the same number.

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



ON OFF

(10ths DIGIT)

SW1

12345678910

SW12

SW11

(1s DIGIT)

SWA 3 2 1

SWB 2 3 4

SWC

(BRANCH No.)

CN82

SW14

CN43

Fig. 4-4

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-P12-P30NBMU-E

SWB

SWA

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

123

Silent Standard High ceiling

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

PLFY-P36NBMU-E

SWB

SWA

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

123

Silent Standard High ceiling

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.

4.8. Electrical characteristics

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

Model

PLFY-P12,P15,P18,P24,P30NBMU-E PLFY-P36NBMU-E 1.25 / 1.25 0.120 / 0.120 1.00 / 1.00

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

60Hz 208 / 230V 198 to 253V

Power supply IFM

IFM: Indoor Fan Motor Output: Fan motor rated output

0.64 / 0.64 0.050 / 0.050 0.51 / 0.51

4. Electrical work

4.9. How to set the ﬁ xed up/down air direction (Only for wired remote controller)

• For PLFY-NBMU, only the particular outlet can be ﬁ xed to certain direction with

the procedures below. Once fixed, only the set outlet is fixed every time air conditioner is turned on. (Other outlets follow UP/DOWN air direction setting of the remote controller.)

Explanation of word

• "Address No. of indoor unit" is the number given to each air conditioner.

• "Outlet No." is the number given to each outlet of air conditioner.

(Refer to the right.)

• "Up/Down air direction" is the direction (angle) to ﬁ x.

Reset 1

horizontal

2345

Operation buttons (During the ﬁ xed airﬂ ow direction mode)

ON/OFF button

Resets the fixed airflow direction mode.

TEMP.

ON/OFF

MONITOR/SET

BACK DAY

PAR-21MAA

CLOCK

OPERATION

Mode button (Return button)

Moves between the selected(blinking) parts.

Outlet No.

Up/Down air direction

ON/OFF

CHECK

CLEAR

Fan Speed button

FILTER

TEST

Filter button (<Enter> button)

Sends the information on remote controller display.

Check button (Clear button)

·Refer to the next page for details.

Address No. of indoor unit

Press for 2 seconds to change / cancel "Fixed airflow direction mode".

Horizontal airflow

Remote controller setting

The airflow direction of this outlet is controlled by the airflow direction setting of remote contoller.

Outlet No.3

Outlet No.2

Note: "0" indicates all outlets.

Press the button with either Address No. of indoor unit or outlet No. blinking, ...

Only the air conditioner with the No. on remote controller and its outlet are set to the setting 5 of the airflow direction. (Other outlets are closed.)

It is used to identify the air conditioner and outlet to set.

Press the button with Up/Down air direction indicater which is blinking

Attention

Only the air conditioner with the No. on Remote controller and its outlet are fixed at "Up/Down air direction" which is blinking.

This is used only to decide direction conclusively. Attention: Be careful not to set wrong air conditioner.

Downward

Fixed setting

The airflow direction of this outlet is fixed in particular direction.

When it is cold because of direct airflow, the airflow direction can be fixed horizontally to avoid direct airflow.

Outlet No.4

MITSUBISHI

ELECTRIC

label

Outlet No.1

5 steps or

cancel

Down

Set temperature buttons

Changes the selection(No.).

Outlet No. "1-4"or "0"

Up/Down air direction

Address No. of indoor unit

"01-50"

4. Electrical work

< Process for setting > [1] To turn off air conditioner and change the remote

controller to "Fixed airﬂ ow direction mode"

1.Press ON/OFF button

2.Press Fan Speed button simultaneously and it becomes the ﬁ xed airﬂ ow direction mode after a while.

"Fixed airflow direction mode" display

Air blows downward after it becomes "fixed airflow direction mode"

to turn off the air conditioner.

and Filter button

for more than 2 seconds

[4] To cancel "Fixed airﬂ ow direction mode"

1.Press ON/OFF button canceled by pressing Fan Speed button 2 seconds simultaneously.

2.Do not operate remote controller for 30 seconds after the "Fixed airﬂ ow direction mode" is canceled. It does not accept even if it is operated.

to cancel "Fixed airflow direction mode".It is also

and Filter button

for more than

[2] To select and identify the outlet to set

1.Press Set Temperature button Select outlet No. to set.

Outlet No.

Outlet No.3

Outlet No.2

2.Press Filter

3. Wait for 15 seconds . How does the air conditioner run?

→

Only the air from the selected outlet blows downward.

→

Air from the wrong outlet blows downward.

→

All outlets are closed.

→

[3] To ﬁ x air direction

1.Press Mode button (Return button)

2.Press Set Temperature button

3.Press Filter button conditioner.

4.Wait for 15 seconds . How does the air conditioner run?

→

Airﬂ ow direction is set in the selected direction.

→

Airﬂ ow direction is set in the wrong direction.

→

button

Go to step[3].

Repeat 1 and set again.

The number of the air conditioner (Address No. of indoor unit) is wrong.

Refer to How to ﬁ nd air conditioner No..

The ﬁ xed setting completed (Go to step [4].)

Repeat 2. and set again.

to change number with the outlet No. blinking.

Up/Down air direction

to send the information on remote controller.

to send the information on remote controller to air

Address No. of indoor unit

Outlet No.4

MITSUBISHI

ELECTRIC

label

Outlet No.1

to blink Up/Down air direction indicater.

until the direction to set is chosen.

Note: "0" indicates

all outlets.

Outlet No.

Air direction changes

Up/Down air direction

This indicates NO FIXED SETTING(canceled)

Address No. of indoor unit

4. Electrical work

How to ﬁ nd air conditioner No.

Each air conditioner has its own Address No. of indoor unit (Example below). Address No. of indoor unit can be set ranging from "01" to "50".

To ﬁ nd air conditioner No. to set, refer to the procedures below. Air conditioner No. is found by its airﬂ ow direction with Address No. of indoor unit changed one after the other.

Example) Structure of the system

Indoor unit

(00)

When the Switch setting of the address is "00", address No. of indoor unit is given automatically

Indoor unit

(01)

Switch setting of the address

(00)

Address No. of indoor unit

MA remote controller

Switch setting of the address

(02)

(03)

[2] To check by changing Address No. of indoor unit. one after the other

(Maximum unit No. is 50)

1.Press Mode button (Return button)

Outlet No.

Adjust to the next address No.with Set Temperature button 5.

2. Press Filter button

3. Wait for 15 seconds after sending. How does the air conditioner run?

→

Only the outlet which No. displayed on remote controller blows downward.

→

No. displayed in remote controller is air conditioner No. (Checking

completed)

→

All outlets are closed.

→

Repeat [1] and continue this procedure.

→

"Err" is displayed on remote controller.

→

This groupe does not have this address No. of indoor unit.(Go

back to [1] and continue .)

Up/Down air direction

to send the information on remote controller.

and Address No. of indoor unit blinks.

Addres No. of indoor unit

Err

Address No. of indoor unit

MA remote controller

When the Switch setting of the address is not "00", switch setting of the address is also address No. of indoor unit.

[1] To check Address No. of indoor unit

1.Press Mode button (Return button) Adjust address No. of indoor unit to "01" with Set Temperature button

Outlet No.

2.Press Filter button 3 to send the information on remote controller.

3. Wait for 15 seconds . How does the air conditioner run?

→

Only air from the outlet which No. displayed on remote controller blows

downward.

→

Address No.01 of indoor unit

→

All outlets are closed.

→

Go to step [2].

and Address No. of indoor unit blinks.

Up/Down air direction

is the air conditioner No..

Address No. of indoor unit

To clear ﬁ xed setting

To clear all ﬁ xed setting(reset to factory default), press check button(clear botton)

for more than 3 seconds in ﬁ xed airﬂ ow direction mode.

Display of remote controller blinks and the set information is cleared.

Note: This operation clears the fixed setting information of all air conditioner connected to the remote controller.

5. Installing the grille









Fig. 5-1

+3/16

A=11/16









Fig. 5-2

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

• This kit contains this manual and the following parts.

Grille 1

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)





Blowout direction patterns











Fig. 5-3









Fig. 5-4

4-directional 3-directional

1 pattern: 4 patterns:

Initial setting 1 air outlet fully closed

2-directional

6 patterns: 2 air outlet fully closed







• 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

[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

Table 1

drain pipe area and at the opposite corner) as shown in the diagram.

Accessory name Q’ty Remark

to remove the corner panel.

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

Main unit



Screw with



19/32 to

25/32



captive washer



Fig. 5-5

(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







 



 





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

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

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

grille and the main unit.

on the corner drain pipe area of 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.

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.



Screw (4×8) ޓ



Corner panel



Safety wire











(Enlarged)

Fig. 5-8







Fig. 5-9



Fig. 5-10





Button



Vane motor



Up/down vanes



Connector



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 per-





formed on the electric component box of the main unit.)

6. Test run (Fig. 6-1)

6.1. Before test run

After completing installation and the wiring and piping of the indoor and

outdoor units, check for refrigerant leakage, looseness in the power supply or control wiring, wrong polarity, and no disconnection of one phase in the supply.

Use a 500-volt megohmmeter to check that the resistance between the

power supply terminals and ground is at least 1.0 M".

ON/OFF button

Test run display

Liquid pipe (Indoor unit)

temperature display

ON/OFF lamp

TEST RUN COOL, HEAT

TEMP.

MONITOR/SET

BACK DAY

PAR-21MAA

CLOCK

°C

ON/OFF

OPERATION

SIMPLE

ON/OFF

CHECK

CLEAR

FILTER

TEST

Fig. 6-1

Power display

Error code display

Test run remaining time display

Set temperature button

Mode selection button

Air direction button

TEST button

Fan Speed button

Louver button

Do not carry out this test on the control wiring (low voltage circuit) termi-

nals.

Warning:

Do not use the air conditioner if the insulation resistance is less than 1.0 M".

6.2. Test run

Using wired remote controller (Fig. 6-1)

Turn on the power at least 12 hours before the test run.

Press the [TEST] button twice. “TEST RUN” liquid crystal display

Press the [Mode selection] button and switch to the cooling (or heating) mode.

Make sure that cold (or warm) wind is blown out.

Press the [Fan speed] button. Make sure that the wind speed is switched.

Press the [Air direction button] or [Louver button].

Check operation of the vane or louver.

Check operation of the outdoor unit fan.

Release test run by pressing the [ON/OFF] button. Stop

The telephone number of the repair shop, sales ofﬁ ce, etc., to contact if an error

occurs can be registered in the remote controller. The telephone number will be displayed when an error occurs. For registration procedures, refer to the operation manual for the indoor unit.

Note:

• If an error code is displayed on the remote controller or if the air conditioner does not operate properly, refer to the outdoor unit installation manual or other technical materials.

• The OFF timer is set for the test run to automatically stop after 2 hours.

• During the test run, the time remaining is shown in the time display.

• During the test run, the temperature of the indoor unit refrigerant pipes is shown in the room temperature display of the remote controller.

• When the VANE or LOUVER button is pressed, the message “NOT AVAILABLE” may appear on the remote controller display depending on the indoor unit model, but this is not a malfunction.





Water supply pump



Water (about 1000cc)



Drain plug



Pour water through outlet



Be careful not to spray water

into the drain pump mechanism.

6.3. Check of drainage (Fig. 6-2)

• Ensure that the water is being properly drained out and that no water is leaking from joints.

When electric work is completed.

Pour water during cooling operation and check.

When electric work is not completed.

Pour water during emergency operation and check.

* Drain pan and fan are activated simultaneously when single phase 208/230V is

turned on to L1 and L2 on terminal block after the connecter (SWE) on controller





board in the electrical branch box is set to ON.

Be sure to turn it back to the former state after work.

Fig. 6-2

+ 30 hidden pages

Mitsubishi Electric CITY MULTI PLFY-P-NBMU-E Installation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual