Electrical work - OUTDOOR UNIT

Electrical work must be performed by qualified personnel in accordance with local

regulations and the instructions provided in this manual. Only use the specified cables and dedicated circuits.

-Inadequate power source capacity or improper electrical work will result in electric shock, malfunction, or fire.

Proper grounding must be provided by qualified personnel.

-Improper grounding may result in electric shock, fire, explosion, or malfunction due to electrical noise. Do not connect the ground wire to gas or water pipes, lightning rods, or telephone ground wires.

10-1. Before electrical work

・When performing electrical work, refer to the indoor unit or controller installation manuals as well.

・Bear in mind ambient conditions (ambient temperature, direct sunlight, rain water, etc.) when proceeding with the wiring and connections.

・When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components.

・Specific wiring requirements should adhere to the wiring regulations of the region.

・Include some slack in the wiring for the control box on the indoor and outdoor units, because these boxes are sometimes removed at the time of service work.

10-2. Power cables and device capacity

Include some slack in the power cables.

-Failure to do so may break or overheat the cables, resulting in smoke or fire.

Install an inverter circuit breaker on the power supply of each unit.

-Failure to do so may result in electric shock or fire.

Only use properly rated breakers (an earth leakage breaker, local switch <a switch + fuse that meets local electrical codes>, or overcurrent breaker).

-Failure to do so may result in electric shock, malfunction, smoke, or fire.

Only use standard power cables of sufficient capacity.

-Failure to do so may result in current leakage, overheating, smoke, or fire.

Tighten all terminal screws to the specified torque.

-Loose screws and contact failure may result in smoke or fire.

If a large electric current flows due to a malfunction or faulty wiring, earth-leakage breakers on the unit side and on the upstream side of the power supply system could both operate.

Depending on the importance of the system, separate the power supply system or take

protective coordination of breakers.

GB

・Wiring example

Ⓑ

Ⓐ Ⓒ

Ⓑ

Ⓐ

Ⓔ Ⓔ

Ⓓ

Ⓔ Ⓔ

Ⓕ

Ⓕ Ⓕ Ⓕ Ⓕ

Ⓐ Earth leakage breaker

Ⓑ Local switch (Overcurrent breaker and earth leakage breaker)

Ⓓ Pull box

Ⓔ Indoor unit

Ⓕ Earth

・Be sure to use the appropriate type of overcurrent breaker. Note that generated overcurrent may include some amount of direct current.

・Select the type of breaker for an inverter circuit as an earth leakage breaker. (Mitsubishi Electric NV-S series or its equivalent)

・The earth leakage breaker should be used in combination with a local switch.

・Use a local switch with at least 3 mm (1/8 in) contact separation in each pole.

・Do not connect the power cables L1, L2, and L3 to N. Ensure the correct phase sequence.

・If the power cable is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.

・Use dedicated power cables for the outdoor unit and indoor unit. Ensure OC and OS are wired individually.

・Power cable size, device capacity, and system impedance

(If local regulations do not specify the minimum power cable size or device capacity, follow the values in the table below.)

Minimum size [mm² (AWG)]

Earth leakage breaker

Local switch (A)

Overcurrent breaker (NFB) (A)

Maximum allowable system

impedance Power

cable

Power cable after branching

point

Earth

wire Capacity Fuse

Outdoor unit

(E)P200 4.0 (12) – 4.0 (12) 30 A 100 mA 0.1 sec. or less 25 25 30 *³

(E)P250 4.0 (12) – 4.0 (12) 30 A 100 mA 0.1 sec. or less 32 32 30 *³

(E)P300 4.0 (12) – 4.0 (12) 30 A 100 mA 0.1 sec. or less 32 32 30 *³

(E)P350 6.0 (10) – 6.0 (10) 40 A 100 mA 0.1 sec. or less 40 40 40 0.27 Ω

(E)P400 10.0 (8) – 10.0 (8) 60 A 100 mA 0.1 sec. or less 63 63 60 0.22 Ω

(E)P450 10.0 (8) – 10.0 (8) 60 A 100 mA 0.1 sec. or less 63 63 60 0.19 Ω

(E)P500 10.0 (8) – 10.0 (8) 60 A 100 mA 0.1 sec. or less 63 63 60 0.16 Ω

Total operating current of the indoor units

F0 ≤ 16 A *¹ 1.5 (16) 1.5 (16) 1.5 (16) 20 A current sensitivity *² 16 16 20 (IEC 61000-3-3) F0 ≤ 25 A *¹ 2.5 (14) 2.5 (14) 2.5 (14) 30 A current sensitivity *² 25 25 30 (IEC 61000-3-3) F0 ≤ 32 A *¹ 4.0 (12) 4.0 (12) 4.0 (12) 40 A current sensitivity *² 32 32 40 (IEC 61000-3-3)

*1 Use the larger value of F1 or F2 as the value of F0.

F1 = Total of each indoor unit's maximum current × 1.2

F2 = {V1 × (Quantity of Type 1)/C} + {V1 × (Quantity of Type 2)/C} + {V1 × (Quantity of Type 3)/C} + {V1 × (Quantity of Type 4)/C}

*2 Current sensitivity is calculated using the following formula.

G1 = (V2 × Quantity of Type 1) + (V2 × Quantity of Type 2) + (V2 × Quantity of Type 3) + (V2 × Quantity of Type 4) + (V3 × Power cable length (km))

*3 Meets technical requirements of IEC 61000-3-3.

~220–240 V L, N 3N~380–415 V L1, L2, L3, N

Indoor unit V1 V2

20 C

10 8 6 4 3 2 0.011

0.1 1 10 60 600

Type 1 PLFY-VBM, PMFY-VBM, PEFY-VMS, PCFY-VKM, PKFY-VHM, PKFY-VKM, PFFY-VKM, PFFY-VLRMM 18.6 2.4 6000

Type 2 PEFY-VMA 38 1.6

Type 3 PEFY-VMHS 13.8 4.8

Type 4 Indoor unit other than the above 0 0

"C" is multiples of the tripping current at 0.01 s.

Obtain the value of "C" from the tripping characteristic of the breaker that is used on site.

Conditions: PEFY-VMS × 4 units, PEFY-VMA × 1 unit, "C" = 8 (See the sample chart.) F2 = 18.6 × 4/8 + 38 × 1/8

= 14.05

→ Use a 16 A type breaker. (Tripping current = 8 × 16 A at 0.01 s)

Power cable size [mm² (AWG)] V3

1.5 (16) 48

2.5 (14) 56

4.0 (12) 66

G1 Current sensitivity

30 mA or less 30 mA 0.1 sec or less 100 mA or less 100 mA 0.1 sec or less

・The wire size is the minimum value for metal conduit wiring. If the voltage drops, use a wire that is one size thicker in diameter. Make sure the power-supply voltage does not drop more than 10%. Make sure that the voltage imbalance between the phases is 2% or less.

・Power supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed flexible cord (design 60245 IEC57). For example, use wiring such as YZW.

・This unit is intended for the connection to a power supply system with a maximum permissible system impedance shown in the above table at the interface point (power service box) of the user’s supply.

・The user must ensure that this unit is connected only to a power supply system which fulfils the requirement above.

If necessary, the user can ask the public power supply company for the system impedance at the interface point.

・This unit complies with IEC 61000-3-12 provided that the short-circuit power Ssc is greater than or equal to Ssc*

at the interface point between the user’s supply and the public system. It is the responsibility of the installer or user of the equipment to ensure, by consultation with the distribution network operator if necessary, that the equipment is connected only to a supply with a short-circuit power Ssc greater than or equal to Ssc*

.

*1 Ssc

Model Ssc (MVA) Model Ssc (MVA)

P200 1.25 EP200 1.25

P250 1.38 EP250 1.27

P300 1.76 EP300 1.58

P350 2.05 EP350 1.87

P400 2.48 EP400 2.19

P450 2.88 EP450 2.62

P500 3.39 EP500 3.17

Tripping Time [s]

SAMPLE

Multiples of rated tripping current

Sample chart

GB

10-3. Control cable specifications

・Transmission cable

Type 2-core shielded cable CVVS, CPEVS, or MVVS Size 1.25 mm² (AWG 16), or ø1.2 mm or above Length Max. 200 m (656 ft)

Remarks

The maximum allowable length of transmission cables via outdoor units (both centralized control transmission cables and indoor-outdoor transmission cables) is 500 m (1640 ft)^*1.

The maximum allowable length of transmission cables from the power supply unit to each outdoor unit or to the system controller is 200 m (656 ft).

* Do not use a single multiple-core cable to connect indoor units that belong to different refrigerant systems. The use of a multiple-core cable may result in signal transmission errors and malfunctions.

* Ensure shield continuity when extending the transmission cable.

*1 When extending the length of the transmission cables to 1000 m (3280 ft), consult your dealer.

・Remote controller cable

ME remote controller cable MA remote controller cable

Type 2-core sheathed cable (unshielded) CVV

Size 0.3–1.25 mm² (AWG 22–16) (0.75–1.25 mm² (AWG 18–16) if a simple remote controller is connected) Length Max. 10 m (32 ft)

* If the length exceeds 10 m (32 ft), use a 1.25 mm²

(AWG 16) shielded cable. Max. 200 m (656 ft)

10-4. System configuration

・Unit code and the maximum number of connectable units

Unit type Code Number of connectable units

Outdoor unit Main unit OC –

Sub unit OS1, OS2 –

Indoor unit IC 1 to 26 units per OC

Remote controller RC 0 to 2 units per group

Transmission booster unit RP 0 to 1 unit per OC

* A transmission booster may be required depending on the number of connected indoor units.

* The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2. The outdoor units are designated as OC, OS1, and OS2 in the order of capacity from large to small (if two or more units have the same capacity, in the order of address from small to large).

・System configuration example

* The numbers in the parentheses in the figures below indicate address numbers.

(1) When ME remote controllers are connected

Ⓐ

Ⓑ

Ⓒ

Ⓐ Shielded cable

Ⓑ Sub remote controller

*1 When a power supply unit is not connected to the centralized control transmission cable, move the power jumper from CN41 to CN40 on only one of the outdoor units.

*2 If a system controller is used, set SW5-1 on ALL of the outdoor units to ON.

Maximum allowable length of control cables

Transmission cables via outdoor units L¹ + L² + L³ + L⁴, L¹ + L² + L³ + L⁵, L¹ + L² + L⁶ ≤ 500 m (1640 ft)^*3 Transmission cables L1, L3 + L4, L3 + L5, L6, L2 + L6 ≤ 200 m (656 ft)

Remote controller cables

ℓ1, ℓ2, ℓ3, ℓ4 ≤ 10 m (32 ft)

* If the length exceeds 10 m (32 ft), the length that exceeds 10 m (32 ft) needs to be included in the maximum allowable length of transmission cables above.

*3 When extending the length of the transmission cables to 1000 m (3280 ft), consult your dealer.

* Leave the power jumper connected to CN41.

* SW5-1: ON *²

* Move the power jumper from CN41 to CN40. *¹

* SW5-1: ON *²

Group 1 Group 3 Group 5

GB (2) When MA remote controllers are connected

Ⓐ

Ⓑ

Ⓒ

Ⓐ Shielded cable

Ⓑ Sub remote controller

*1 When a power supply unit is not connected to the centralized control transmission cable, move the power jumper from CN41 to CN40 on only one of the outdoor units.

*2 If a system controller is used, set SW5-1 on ALL of the outdoor units to ON.

*3 When a PAR-31MAA is connected to a group, no other MA remote controllers can be connected to the same group.

Maximum allowable length of control cables

Transmission cables via outdoor units L1 + L2 + L3 + L4, L1 + L2 + L6 ≤ 500 m (1640 ft)^*4 Transmission cables L1, L3 + L4, L6, L2 + L6 ≤ 200 m (656 ft) Remote controller cables m¹+ m², m¹ + m² + m³ + m⁴ ≤ 200 m (656 ft)

*4 When extending the length of the transmission cables to 1000 m (3280 ft), consult your dealer.

(3) When a transmission booster unit is connected

TB7 TB7 TB7

Ⓐ

Ⓐ Shielded cable

*1 Daisy-chain terminals (TB3) on outdoor units together in the same refrigerant system.

*2 Leave the power jumper connected to CN41.

Maximum allowable length of control cables

Transmission cables L¹ + L² + L³ + L⁵ + L⁶, L¹ + L² + L³ + L⁵ + L⁷, L¹+ L²+ L⁴, L⁶ + L⁵ + L³ + L⁴, L⁴ + L³ + L⁵ + L⁷ ≤ 200 m (656 ft) Remote controller cables

ℓ1, ℓ2 ≤ 10 m (32 ft)

* If the length exceeds 10 m (32 ft), the length that exceeds 10 m (32 ft) needs to be included in the maximum allowable length of transmission cables above.

* Leave the power jumper connected to CN41.

* SW5-1: ON *²

* Move the power jumper from CN41 to CN40. *¹

* SW5-1: ON *²

Group 1 Group 3 Group 5

Earth

10-5. Wiring connections in the control box

Connections must be made securely and without tension on the terminals.

-Improperly connected cables may break, overheat, or cause smoke or fire.

10-5-1. Threading power cable through the knockout hole

・Open the front panel when performing wiring work.

・Punch out the knockout holes at the bottom of the front panel or base with a hammer. Use the appropriate knockout hole according to the size of the power cable, referring to the table below.

(1) When routing the wiring through the front of the unit (2) When routing the wiring through the bottom of the unit

Ⓑ

Ⓒ

Ⓐ

Ⓒ

Ⓐ

Ⓑ

Ⓓ

Ⓔ Ⓔ

Power cable size (mm²) Knockout hole to be used 2, 3.5, 5.5 Knockout hole 2

8, 14 Knockout hole 4

21, 26, 33 Knockout hole 3 84, 67, 53 Knockout hole 5

Ⓐ Cable strap

Ⓑ Power cable

The length of the section after the cable access hole must be at least 1100 mm (43 in).

Ⓓ Clamp

Ⓔ Ground wire that connects Main Box and Inverter Box

Fill the gap.

GB

<Notice>

・Do not remove the ground wire that connects Main Box and Inverter Box.

・Install the transmission cable as shown in the figure above so that the cable is long enough for the Main Box to be moved for servicing.

・If there are any gaps around the power cable and transmission cable, please be sure to fill these in with a suitable material to prevent snow from entering, which may cause damage to the electrical parts, and to protect your hands from direct contact with cables.

・When putting the power cable through the knockout hole without using a conduit tube, deburr the hole and protect the power cable with protective tape.

・Use a conduit tube to narrow down the opening if there is a possibility of small animals entering the unit.

・When taking the conduit tube out from the bottom part of the unit, caulk around the tube opening to prevent water

infiltration.

10-5-2. Fixing the cables in place

Route the cables as shown in the figures below.

・(E)P200 to 300

・(E)P350 to 500

Fill the gap.

Rubber bushing (for main inverter connection wiring (200 V) and unit wiring (solenoid coil wiring))

Inverter Box Main Box

Cable strap

Tie band (Supplied)

Rubber bushing 1 Transmission terminal block

Main inverter connection wiring (low voltage)

Transmission cable (not supplied) The length of the section after the cable access hole must be at least 1100 mm (43 in).

Power supply terminal block

Power cable (not supplied) Rubber bushing 2

Tie band (Supplied)

Unit wiring (sensor wiring)

Rubber bushing (for FAN cable)

Rubber bushing (for Fan cable and unit wiring (solenoid coil wiring))

Cable strap

Tie band (Supplied)

Rubber bushing 1 Transmission terminal block

Transmission cable (not supplied)

Power supply terminal block

Power cable (not supplied) Rubber bushing 2

Tie band (Supplied)

Unit wiring (sensor wiring)

Fill the gap.

GB Take the procedure below.

① Thread the power cable through the rubber bushing 1. (See *

and *

below.)

② Thread the unit wiring (sensor wiring) and the transmission cable through the rubber bushing 2. (See *

and *

below.)

③ Hold the power cable and the transmission cable in place respectively with the cable straps.

④ Secure each rubber bushing with the supplied tie band. (See *

below.)

*1 Make sure the cables are not coming out of the rubber bushing cut.

*2 When threading the wiring through the rubber bushing, make sure the rubber bushing will not come off the sheet metal on the control box.

*3 When tying the supplied tie band around the rubber bushing, make sure to leave no gap between the ends.

Cables are coming out of the rubber bushing.

Wiring Cross-sectional view Rubber bushing

(oval part) Rubber bushing (oval part) Cut

Top view Wiring

Wiring Top view

Rubber bushing

Sheet metal on the control box Rubber bushing Sheet metal on

the control box

Rubber bushing

<<Important>>

When putting the tie band on the rubber bushing, make sure the ends of the rubber bushing overlap each other as shown in the figure at left.

* If there is a gap, water from snow or rain may enter, resulting in equipment damage.

Cut on the rubber bushing There is a gap in

the rubber bushing.

Approx. 20 mm (13/16 in)

Cut on the rubber bushing Tie band

Overlapped rubber bushing

10-5-3. Connecting the cables

PUHY-(E)P200 to 300YNW-A

L1 L2 L3 N

Ⓐ-1 Ⓐ-2 Ⓑ Ⓒ Ⓓ

PUHY-(E)P350 to 500YNW-A

L1 L2 L3 N

Ⓑ Power supply terminal block (TB1)

Ⓓ Terminal block for centralized control transmission cable (TB7)

Ⓐ Ⓑ

Ⓑ Properly installed terminal block

Ⓐ

Ⓑ

Ⓒ Ⓔ

Ⓓ Ⓐ Power cables, transmission cables

Ⓑ Daisy-chain (transmission cables only)

Ⓓ Make an alignment mark.

Ⓔ Install the ring terminals back to back.

<Notice>

・Connect the cables respectively to the power supply terminal block and the transmission terminal block.

Erroneous connection does not allow the system to operate.

・Never connect the power cable to the transmission terminal block. If connected, electrical parts will be damaged.

・Transmission cables should be (5 cm (2 in) or more) apart from the power cable so that it is not influenced by electric noise from the power cable. (Do not put the transmission cables and the power cable in the same conduit.)

・Follow the tightening torque for each screw type as shown below. Be careful not to use excessive torque as this could damage the screw.

Terminal block (TB1 (M6 screw)): 2.5–2.9 [N·m]

Terminal block (TB3, TB7 (M3.5 screw)): 0.82–1.0 [N·m]

・When tightening the screws, do not push the driver strongly to avoid damaging the screw.

・Make an alignment mark with a permanent marker across the screw head, washer, and terminal after tightening the screws.

Take the procedure below to connect the cables.

① Connect the indoor-outdoor transmission cable to TB3.

If multiple outdoor units are connected to the same refrigerant system, daisy-chain TB3 (M1, M2, earth) on the outdoor units. The indoor-outdoor transmission cable to the indoor unit should be connected to TB3 (M1, M2, earth) of only one of the outdoor units. Connect the shield to the earth terminal.

② Connect the centralized control transmission cables (between the centralized control system and the outdoor units of different refrigerant systems) to TB7.

If multiple outdoor units are connected to the same refrigerant system, daisy-chain TB7 (M1, M2, S) on all outdoor units.*

Connect the shield to the S terminal.

*1 If TB7 on the outdoor units in the same refrigerant system are not daisy-chained, connect the centralized control transmission cable to TB7 on the OC. If the OC is out of order, or if centralized control is being conducted during a power supply shut-off, daisy-chain TB7 on the OC, OS1 and OS2. (In the case that the outdoor unit whose power jumper CN41 on the control board has been replaced with CN40 is out of order or the power is shut-off, centralized control will not be conducted even when TB7 is daisy-chained.)

③ When a power supply unit is not connected to the centralized control transmission cable, move the power

jumper from CN41 to CN40 on the control board (main board) on only one of the outdoor units.

GB

④ On the outdoor unit whose power jumper was moved from CN41 to CN40, short circuit the S terminal and the earth terminal.

⑤ Connect terminals M1 and M2 of the transmission terminal block on the indoor unit that has the lowest address in the group to the terminal block on the remote controller.

⑥ When a system controller is connected, set SW5-1 on all outdoor units to ON.

⑦ Fix the cables securely in place with the cable strap below the terminal block.

10-6. Address setting

・Set the address setting switch as follows.

Address setting method Address

Indoor unit (Main, Sub) Assign the lowest address to the main indoor unit in the group, and assign sequential

addresses to the rest of the indoor units in the same group. 01 to 50 Outdoor unit (OC, OS1, OS2) Assign sequential addresses to the outdoor units in the same refrigerant system.

* To set the address to 100, the address setting switch must be set to 50. 51 to 100 ME remote controller Main Assign an address that equals the address of the main indoor unit in the group plus 100. 101 to 150

Sub Assign an address that equals the address of the main indoor unit in the group plus 150. 151 to 200 MA remote controller Address setting is not required. (The Main/Sub setting is required.) –

* Make indoor unit group settings from remote controllers after turning on the power to all units.

Address setting switch (Outdoor units)

In document OUTDOOR UNIT (сторінка 42-54)