Mitsubishi Electric PFFY-P50VLRMM-E [9/11] Power supply wiring

FINL EPGRRUTR

System configuration For a single-refrigerant system For a multi-refrigerant system

Transmission cable length Less than 120 m More than 120 m Regardless of length

Facility example

(for noise judgment)

Types of transmission

cables

Residence or independent store

without noise

VCTF, VCTFK, CVV, CVS, VVR,

VVF, VCT or shielding wire

CVVS or CPEVS

Building, clinic, hospital or communications

station without noise supposedly generated

from inverter equipment, private power gen-

erator, high-frequency medical equipment,

radio-used communications equipment and

so on

All facilities

Shielding wire CVVS or CPEVS

2. Remote controller cables

Types of cables

Cable diameter

Length

MA remote controller

Sheathed 2-core cable (unshielded) CVV

0.3 to 1.25 mm

Less than 200 m

M-NET remote controller

Sheathed 2-core cable (unshielded) CVV

0.3 to 1.25 mm

Add any portion in excess of 10 m to within the longest allowable trans-

mission cable length 200 m (Shielding portion is more than 1.25 mm

)

Length Less than 120 m Less than 200 m

7.1. Power supply wiring

• Power supply cords of appliances shall not be lighter than design 245 IEC 57

or 227 IEC 57.

• A switch with at least 3 mm contact separation in each pole shall be provided

by the Air conditioner installation.

Power cable size: more than 1.5 mm

[Fig. 7.1.1] (P.3)

A Switch 16 A B Overcurrent protection 16 A

C Indoor unit

D Total operating current be less than 16 A

E Pull box

[Selecting non-fuse breaker (NF) or earth leakage breaker (NV)]

To select NF or NV instead of a combination of Class B fuse with switch, use the

following:

• In the case of Class B fuse rated 15 A or 20 A,

NF model name (MITSUBISHI): NF30-CS (15 A) (20 A)

NV model name (MITSUBISHI): NV30-CA (15 A) (20 A)

Use an earth leakage breaker with a sensitivity of less than 30 mA 0.1 s.

Caution:

Do not use anything other than the correct capacity breaker and fuse. Using

fuse, wire or copper wire with too large capacity may cause a risk of mal-

function or fire.

7.2. Connecting remote controller, indoor

and outdoor transmission cables

(Remote controller is optionally available.)

• 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 con-

troller.

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

polarized 2-wire)

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

(Non-polarized 2-wire)

• Connect the remote controller’s transmission cable within 10 m using a 0.75 mm

core cable. If the distance is more than 10 m, use a 1.25 mm

junction cable.

[Fig. 7.2.1] (P.4) MA Remote controller

[Fig. 7.2.2] (P.4) M-NET Remote controller

A Terminal block for indoor transmission cable

B Terminal block for outdoor transmission cable

C Remote controller

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

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

[Fig. 7.2.3] (P.4) MA Remote controller

[Fig. 7.2.4] (P.4) M-NET Remote controller

A Non-polarized B TB15

C Remote Controller D TB5

• The MA remote controller and the M-NET remote controller cannot be used at

the same time or interchangeably.

Note:

Ensure that the wiring is not pinched when fitting the terminal box cover.

Pinching the wiring may cut it.

Caution:

Install wiring so that it is not tight and under tension. Wiring under tension

may break, or overheat and burn.

• Fix power source wiring to control box by using buffer bushing for tensile force.

(PG connection or the like.) Connect transmission wiring to transmission ter-

minal block through the knockout hole of control box using ordinary bushing.

• After wiring is complete, make sure again that there is no slack on the connec-

tions, and attach the cover onto the control box in the reverse order removal.

Caution:

Wire the power supply so that no tension is imparted. Otherwise disconnec-

tion, heating or fire result.

Note:

Put the transmission cable earth via the outdoor unit’s earth terminal

the ground.

[Constraints on transmission cable]

[Fig. 7.2.5] (P.4)

G Outdoor unit H Earth

I Indoor unit J Remote controller

K Non-polarized 2-wire

7.3. Connecting electrical wires

(Ensure that there is no slack on terminal screws.)

Make sure that the model name in the operation manual attached to the control

box cover is the same as that on the rating plate.

1. Remove the screw (2pcs) holding the cover to dismount the cover.

2. Open knockout holes.

(Recommend to use a screwdriver or the like for this work.)

[Fig. 7.3.1] (P.4)

A Control box B Cover

C Screw D Knockout hole

E Remove

3. Fix power source wiring to control box by using buffer bushing for tensile force.

(PG connection or the like.) Connect transmission wiring to transmission ter-

minal block through the knockout hole of control box using ordinary bushing.

[Fig. 7.3.2] (P.4)

A Use PG bushing to keep the weight of the cable and external force from being

applied to the power supply terminal connector. Use a cable tie to secure the

cable.

B Power source wiring C Tensile force

D Use ordinary bushing E Transmission wiring

4. Connect the power source, Earth, transmission and remote controller wiring.

[Fig. 7.3.3] (P.4)

A Power source terminal block B Terminal block for indoor transmission

C Terminal block for remote controller D To 1-phase power source

E Transmission line DC 30 V

F Terminal block for outdoor transmission line (TB3)

G Transmission line to the remote controller, terminal block for indoor unit and BC

controller

WT05228X01_en 07.10.4, 3:51 PM9

Mitsubishi Electric PFFY-P50VLRMM-E [9/11] Power supply wiring

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