Mitsubishi Electric PUHY-EP200YLM-A, PUHY-EP250YLM-A, PUHY-EP300YLM-A, PUHY-EP350YLM-A, PUHY-EP400YLM-A INSTALLATION MANUAL

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Air-Conditioners For Building Application Inverter Y-Series

OUTDOOR UNIT

PUHY-EP-YLM-A (-BS)

For use with R410A

INSTALLATION MANUAL

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

INSTALLATIONSHANDBUCH

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

MANUEL D’INSTALLATION

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

MANUAL DE INSTALACIÓN

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

MANUALE DI INSTALLAZIONE

Per un uso sicuro e corretto, leggere attentamente questo manuale di installazione prima di installare il condizionatore d’aria.

INSTALLATIEHANDLEIDING

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

MANUAL DE INSTALAÇÃO

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

ΕΓΧΕΙΡΙΔΙΟ ΟΔΗΓΙΩΝ ΕΓΚΑΤΑΣΤΑΣΗΣ

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

РУКОВОДСТВО ПО УСТАНОВКЕ

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

GBDFEINLPGRRUTR

MONTAJ ELKİTABI

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

安装手册

为了安全和正确地使用本空调器，请在安装前仔细阅读本安装手册。

PŘÍRUČKA K INSTALACI

V zájmu bezpečného a správného používání si před instalací klimatizační jednotky důkladně pročtěte tuto příručku k instalaci.

NÁVOD NA INŠTALÁCIU

Pre bezpečné a správne použitie si pred inštalovaním klimatizačnej jednotky, prosím, starostlivo prečítajte tento návod na inštaláciu.

TELEPÍTÉSI KÉZIKÖNYV

A biztonságos és helyes használathoz, kérjük, olvassa el alaposan ezt a telepítési kézikönyvet, mielőtt telepítené a légkondicionáló egységet.

PODRĘCZNIK INSTALACJI

W celu bezpiecznego i poprawnego korzystania należy przed zainstalowaniem klimatyzatora dokładnie zapoznać się z niniejszym podręcznikiem instalacji.

PRIROČNIK ZA NAMESTITEV

Za varno in pravilno uporabo pred namestitvijo klimatske naprave skrbno preberite priročnik za namestitev.

INSTALLATIONSHANDBOK

Läs den här installationshandboken noga innan luftkonditioneringsenheten installeras, för säker och korrekt användning.

PRIRUČNIK ZA UGRADNJU

Radi sigurne i ispravne uporabe, temeljito pročitajte ovaj priručnik prije ugradnje klimatizacijskog uređaja.

РЪКОВОДСТВО ЗА МОНТАЖ

За безопасна и правилна употреба, моля, прочетете внимателно това ръководство преди монтажа на климатизатора.

中

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MANUAL CU INSTRUCŢIUNI DE INSTALARE

Pentru o utilizare corectă şi sigură, vă rugăm să citiţi cu atenţie acest manual înainte de a instala unitatea de aer condiţionat.

INSTALLATIONSMANUAL

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

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CONTENTS

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

1-1. General precautions...............................................................................................................2

1-2. Precautions for transporting the unit ...................................................................................... 3

1-3. Precautions for unit installation .............................................................................................. 4

1-4. Precautions for piping work....................................................................................................4

1-5. Precautions for electrical wiring ............................................................................................. 5

1-6. Precautions for relocating or repairing the unit ...................................................................... 5

1-7. Additional precautions ............................................................................................................ 6

2. About the product ················································································· 8

3. Combination of outdoor units ································································· 8

4. Specifications ······················································································· 9

5. Package contents ·················································································10

6. Transporting the unit ············································································ 11

7. Installation location ·············································································· 12

7-1. Single unit installation .......................................................................................................... 12

7-2. Multiple unit installation ........................................................................................................ 13

8. Foundation work ·················································································· 15

9. Refrigerant piping work ········································································17

9-1. Restrictions .......................................................................................................................... 17

9-2. Pipe selection.......................................................................................................................19

9-3. Twinning kit selection ........................................................................................................... 20

9-4. Pipe connection example ..................................................................................................... 20

9-5. Piping connections and valve operations ............................................................................23

9-6. Air-tightness test .................................................................................................................. 26

9-7. Thermal insulation for pipes ................................................................................................. 27

9-8. Evacuation of the system ..................................................................................................... 29

9-9. Additional refrigerant charge ................................................................................................ 30

10. Electrical work ···················································································34

10-1. Before electrical work.........................................................................................................34

10-2. Power cables and device capacity ..................................................................................... 34

10-3. Control cable specifications ............................................................................................... 37

10-4. System configuration .........................................................................................................37

10-5. Wiring connections in the control box ................................................................................ 40

10-6. Address setting .................................................................................................................. 43

11. Test run ····························································································· 44

11-1. Before a test run .................................................................................................................44

11-2. Function setting .................................................................................................................. 45

11-3. Operation characteristics in relation to the refrigerant charge ........................................... 45

11-4. Operation check ................................................................................................................. 46

12. Inspection and maintenance ································································47

13. Rating plate information ······································································ 48

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1. Safety precautions

►Read and observe the safety precautions below and the instructions provided on the

labels affixed to the unit.

►Retain this manual for future reference. Make sure that this manual is passed on to the

end users.

►All refrigerant piping work, electrical work, air-tightness test, and brazing work must be

performed by qualified personnel.

►Incorrect use may result in serious injury.

: indicates a hazardous situation which, if not avoided, could result in

death or serious injury.

: indicates a hazardous situation which, if not avoided, could result in

minor or moderate injury.

: addresses practices not related to personal injury, such as product

and/or property damage.

1-1. General precautions

Do not use any refrigerant other than the type indicated in the manuals for the unit and on the nameplate.

- Doing so will cause the unit or pipes to burst, or result in an explosion or fire during use, during repairs, or at the time of disposal of the unit.

- It may also be in violation of applicable laws.

- MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from the use of the wrong type of refrigerant.

Do not use the unit in an unusual environment.

- If the unit is used in areas exposed to large amounts of oil, steam, organic solvents, or corrosive gases (such as ammonia, sulfuric compounds, or acids), or areas where acidic/alkaline solutions or special chemical sprays are used frequently, it may significantly reduce the performance and corrode the internal parts, resulting in refrigerant leakage, water leakage, injury, electric shock, malfunction, smoke, or fire.

Do not change the settings of the safety or protection devices.

- Forcing the unit to operate by disabling the safety devices, such as the pressure switch or the thermal switch, may result in bursting, fire, or explosion.

- Operating the unit with a safety device whose settings have been changed may result in bursting, fire, or explosion.

- Using safety devices other than those specified by Mitsubishi Electric may result in bursting, fire, or explosion.

Do not alter or modify the unit.

- Doing so will result in refrigerant leakage, water leakage, serious injury, electric shock, or fire.

Do not wet the electrical parts.

- Doing so may result in current leakage, electric shock, malfunction, or fire.

Do not touch the electrical parts, switches, or buttons with wet fingers.

- Doing so may result in electric shock, malfunction, or fire.

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Do not touch the refrigerant pipes and refrigerant line components with bare hands during and immediately after operation.

- The refrigerant in the pipes will be very hot or very cold, resulting in frostbite or burns.

Do not touch the electrical parts with bare hands during and immediately after operation.

- Doing so may result in burns.

Ventilate the room while servicing the unit.

- If the refrigerant leaks, oxygen deficiency may result. If the leaked refrigerant comes in contact with a heat source, toxic gas will be generated.

If you notice any abnormality (e.g., a burning smell), stop the operation, turn off the power switch, and consult your dealer.

- Continuing the operation may result in electric shock, malfunction, or fire.

Properly install all required covers and panels on the terminal box and the control box.

- If dust or water enters the unit, this may result in electric shock or fire.

Periodically check the unit base for damage.

- If the damage is left uncorrected, the unit will fall and cause serious injury.

Consult your dealer for the proper disposal of the unit.

- The refrigerant oil and the refrigerant in the unit will pose a risk of environmental pollution, fire, or explosion.

Children should be supervised to ensure that they do not play with the appliance.

Do not operate the unit with the panels and guards removed.

- Rotating, hot, or high-voltage parts may cause injury, electric shock, or fire.

Do not touch fans, heat exchanger fins, or the sharp edges of components with bare hands.

- Doing so may result in injury.

Wear protective gloves when working on the unit.

- Failure to do so may result in injury.

1-2. Precautions for transporting the unit

When lifting the unit, pass the slings through the four designated sling holes.

- Improper lifting will cause the unit to topple or fall, resulting in serious injury.

Do not lift the unit with the PP bands that are used on some products.

- Doing so may result in injury.

Observe the restrictions on the maximum weight that a person can lift, which is specified in local regulations.

- Failure to do so may result in injury.

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1-3. Precautions for unit installation

Do not install the unit where combustible gas may leak.

- If combustible gas accumulates around the unit, fire or explosion may result.

Do not allow children to play with the packing materials.

- Suffocation or serious injury may result.

Cut up the packing materials before disposal.

All installation work must be performed by qualified personnel in accordance with this manual.

- Improper installation may result in refrigerant leakage, water leakage, serious injury, electric shock, or fire.

If the air conditioner is installed in a small room, take measures to prevent the refrigerant concentration from exceeding the safety limit in the event of refrigerant leakage.

- Consult your dealer regarding the appropriate measures to prevent the allowable concentration from being exceeded. If the refrigerant leaks and the allowable concentration is exceeded, hazards due to a lack of oxygen in the room will result.

Install the unit in accordance with the instructions to minimize the risk of damage from earthquakes and strong winds.

- Improper installation will cause the unit to topple, resulting in serious injury.

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

- Failure to do so will cause the unit to fall, resulting in serious injury.

Seal all openings around pipes and wires to keep out small animals, rainwater, or snow.

- Failure to do so may result in current leakage, electric shock, or damage to the unit.

1-4. Precautions for piping work

Before heating the brazed sections, remove the gas and oil that are trapped in the pipes.

- Failure to do so may generate fire, resulting in serious injury.

Do not purge the air using refrigerant. Use a vacuum pump to evacuate the system.

- Residual gas in the refrigerant lines will cause bursting of the pipes or an explosion.

Do not use oxygen, flammable gas, or a refrigerant containing chlorine for air-tightness testing.

- Doing so may result in an explosion. Chlorine will deteriorate the refrigerant oil.

When installing or relocating the unit, do not allow air or any substance other than the specified refrigerant to enter the refrigerant lines.

- Any substance other than the specified refrigerant may cause abnormally high pressure in the refrigerant lines, resulting in bursting of the pipes or an explosion.

After the installation has been completed, check for refrigerant leaks.

- If the refrigerant leaks, oxygen starvation may result. If the leaked refrigerant comes in contact with a heat source, toxic gas will be generated.

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1-5. Precautions for electrical wiring

Include some slack in the power cables.

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

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

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

Tighten all terminal screws to the specified torque.

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

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.

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.

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.

After the wiring work has been completed, measure the insulation resistance, and make

sure that it reads at least 1 MΩ.

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

1-6. Precautions for relocating or repairing the unit

Only qualified personnel must relocate or repair the unit. Do not attempt to disassemble or alter the unit.

- Failure to do so will result in refrigerant leakage, water leakage, serious injury, electric shock, or fire.

Do not service the unit in the rain.

- Doing so may result in electric leakage, electric shock, wire shorting, malfunction, smoke, or fire.

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1-7. Additional precautions

Do not turn off the power immediately after stopping operation.

- Wait for at least five minutes after the unit has stopped before turning off the power. Failure to do so may result in drain water leakage or the mechanical failure of sensitive parts.

The unit must be periodically inspected by a dealer or qualified personnel.

- If dust or dirt accumulates inside the unit, the drain pipes may become clogged, and water leakage from the pipes may wet the surroundings and generate odours.

Turn on the power at least 12 hours before starting operation. Keep the power turned on throughout the operating season.

- Insufficient energizing will result in malfunction.

Do not use the air conditioner for special purposes (e.g. keeping food, animals, plants, precision devices, or art objects in a room).

- Such items could be damaged or deteriorated.

Collect the refrigerant and properly dispose of it in accordance with local regulations.

Do not install the unit on or over items that are subject to water damage.

- When the room humidity exceeds 80% or if the drain pipe is clogged, condensation may collect and drip from the indoor unit onto the ceiling or floor.

Drain piping must be installed by a dealer or qualified personnel to ensure proper drainage.

- Improper drain piping may cause water leakage, resulting in damage to furniture and other surroundings.

Take appropriate measures against electrical noise interference when installing the unit in hospitals or radio communication facilities.

- Inverter, high-frequency medical, or wireless communication equipment as well as power generators may cause the air conditioning system to malfunction. The air conditioning system may also adversely affect the operation of these types of equipment by creating electrical noise.

Insulate pipes to prevent condensation.

- Condensation may collect and drip from the unit onto the ceiling or floor.

Keep the service valves closed until refrigerant charging is completed.

- Failure to do so will damage the unit.

Place a wet towel on the service valves before brazing the pipes to keep the temperature of the valves from rising above 120ºC (248ºF).

- Failure to do so may result in equipment damage.

Keep the flame out of contact with the cables and metal sheet when brazing the pipes.

- Failure to do so may result in burnout or malfunction.

Use the following tools specifically designed for use with the specified refrigerant: Gauge manifold, charge hose, gas leak detector, check valve, refrigerant charge base, vacuum gauge, and refrigerant recovery equipment.

- Gas leak detectors for conventional refrigerants will not react to a refrigerant that does not contain chlorine.

- If the specified refrigerant is mixed with water, refrigerant oil, or another refrigerant, the refrigerant oil will deteriorate and the compressor will malfunction.

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Use a vacuum pump with a check valve.

- If the vacuum pump oil flows back into the refrigerant lines, the refrigerant oil may deteriorate and the compressor may malfunction.

Keep tools clean.

- If dust, dirt, or water accumulates on the charging hose or the flare processing tool, the refrigerant will deteriorate and the compressor will malfunction.

Use refrigerant piping made of phosphorus deoxidized copper (copper and copper alloy seamless pipes) that meets local requirements. Pipe joints should also meet local requirements. Keep the inner and outer surfaces of the pipes clean and free of sulphur, oxides, dust/dirt, shaving particles, oils, moisture, or any other contaminants.

- Contaminants on the inside of the refrigerant piping will cause the refrigerant oil to deteriorate and cause the compressor to malfunction.

Store pipes indoors, and keep both ends of the pipes sealed until just before making a flare connection or brazing. (Store elbows and other joints in plastic bags.)

- If dust, dirt, or water enters the refrigerant lines, the refrigerant oil will deteriorate and the compressor will malfunction.

Braze the pipes with a nitrogen purge to avoid oxidation.

- Oxidized flux inside the refrigerant pipes will cause the refrigerant oil to deteriorate and cause the compressor to malfunction.

Do not use existing refrigerant piping.

- The old refrigerant and refrigerant oil in the existing piping contain a large amount of chlorine, which will cause the refrigerant oil in the new unit to deteriorate and cause the compressor to malfunction.

Charge refrigerant in a liquid state.

- Charging refrigerant in the gaseous state will change the composition of the refrigerant and lead to a performance drop.

Do not use a charging cylinder when charging refrigerant.

- The use of a charging cylinder may change the composition of the refrigerant and lead to a performance drop.

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.

This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial use by lay persons.

This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.

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2. About the product

・The outdoor unit described in this manual is air-conditioning equipment that is designed only for human comfort. ・The numeric values in the unit model name (e.g., PUHY-EP***-YLM-A) indicate the capacity index of the unit. ・This unit uses R410A refrigerant.

3. Combination of outdoor units

Outdoor unit model Combination of outdoor units PUHY-EP200YLM-A(-BS) - - PUHY-EP250YLM-A(-BS) - - PUHY-EP300YLM-A(-BS) - - PUHY-EP350YLM-A(-BS) - - PUHY-EP400YLM-A(-BS) - - PUHY-EP450YLM-A(-BS) - - PUHY-EP500YLM-A(-BS) - - PUHY-EP500YSLM-A(-BS) PUHY-EP250YLM-A(-BS) PUHY-EP250YLM-A(-BS) PUHY-EP550YSLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP250YLM-A(-BS) PUHY-EP600YSLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP650YSLM-A(-BS) PUHY-EP250YLM-A(-BS) PUHY-EP200YLM-A(-BS) PUHY-EP200YLM-A(-BS) PUHY-EP700YSLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP200YLM-A(-BS) PUHY-EP200YLM-A(-BS) PUHY-EP750YSLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP250YLM-A(-BS) PUHY-EP200YLM-A(-BS) PUHY-EP800YSLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP200YLM-A(-BS) PUHY-EP850YSLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP250YLM-A(-BS) PUHY-EP900YSLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP950YSLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP1000YSLM-A(-BS) PUHY-EP400YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP1050YSLM-A(-BS) PUHY-EP400YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP1100YSLM-A(-BS) PUHY-EP400YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP1150YSLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP1200YSLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP400YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP1250YSLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP1300YSLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP400YLM-A(-BS) PUHY-EP1350YSLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP450YLM-A(-BS)

* "Twinning Kit" is required to connect combination units on site.

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4. Specifications

Model

PUHY-EP200YLM-A PUHY-EP250YLM-A PUHY-EP300YLM-A PUHY-EP350YLM-A PUHY-EP400YLM-A Sound level (50/60 Hz) 57 dB <A> 60 dB <A> 61 dB <A> 61 dB <A> 62.5 dB <A> External static pressure 0 Pa*

Total capacity 50% to 130%*

Indoor unit

Model 15 to 250

Quantity 1 to 17 1 to 21 1 to 26 1 to 30 1 to 34

Temperature range (Cooling)

Temperature range (Heating)

Model

Indoor W.B. +15.0°C to +24.0°C (+59.0°F to +75.0°F) Outdoor D.B. -5.0°C to +52.0°C (+23.0°F to +126.0°F) Indoor D.B. +15.0°C to +27.0°C (+59.0°F to +81.0°F) Outdoor W.B. -20.0°C to +15.5°C (-4.0°F to +60.0°F)

PUHY-EP450YLM-A PUHY-EP500YLM-A PUHY-EP500YSLM-A PUHY-EP550YSLM-A PUHY-EP600YSLM-A Sound level (50/60 Hz) 63 dB <A> 63.5 dB <A> 63 dB <A> 63.5 dB <A> 64 dB <A> External static pressure 0 Pa*

Total capacity 50% to 130%*

Indoor unit

Model 15 to 250

Quantity 1 to 39 1 to 43 1 to 43 2 to 47 2 to 50

Temperature range (Cooling)

Temperature range (Heating)

Model

PUHY-EP650YSLM-A PUHY-EP700YSLM-A PUHY-EP750YSLM-A PUHY-EP800YSLM-A PUHY-EP850YSLM-A Sound level (50/60 Hz) 63 dB <A> 63.5 dB <A> 64.5 dB <A> 65 dB <A> 65.5 dB <A> External static pressure 0 Pa*

Total capacity 50% to 130%*

Indoor unit

Model 15 to 250

Quantity 2 to 50 2 to 50 2 to 50 2 to 50 2 to 50

Temperature range (Cooling)

Temperature range (Heating)

Model

PUHY-EP900YSLM-A PUHY-EP950YSLM-A

PUHY-EP1000YSLM-A PUHY-EP1050YSLM-A PUHY-EP1100YSLM-A Sound level (50/60 Hz) 66 dB <A> 66 dB <A> 66.5 dB <A> 66.5 dB <A> 66.5 dB <A> External static pressure 0 Pa*

Total capacity 50% to 130%*

Indoor unit

Model 15 to 250

Quantity 2 to 50 2 to 50 2 to 50 3 to 50 3 to 50

Temperature range (Cooling)

Temperature range (Heating)

Model

PUHY-EP1150YSLM-A PUHY-EP1200YSLM-A PUHY-EP1250YSLM-A PUHY-EP1300YSLM-A PUHY-EP1350YSLM-A Sound level (50/60 Hz) 66.5 dB <A> 67 dB <A> 67.5 dB <A> 68 dB <A> 68 dB <A> External static pressure 0 Pa*

Total capacity 50% to 130%*

Indoor unit

Model 15 to 250

Quantity 3 to 50 3 to 50 3 to 50 3 to 50 3 to 50

Temperature range (Cooling)

Temperature range (Heating)

*1 The maximum total capacity of indoor units operating simultaneously is 130%. *2 To enable the high static pressure setting, set the dipswitch on the main board as follows.

SW6-4: ON SW6-5: OFF (60 Pa) or ON (30 Pa)

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5. Package contents

The table below lists all the parts and their quantities included in the package.

① ② ③ ④

Connecting pipe

(Liquid side)

ID ø9.52 mm (ø3/8 in)

OD ø9.52 mm (ø3/8 in)

ID ø9.52

ø9.52

Connecting pipe

(Liquid side)

ID ø12.7 mm (ø1/2 in) ID ø15.88 mm (ø5/8 in) OD ø12.7 mm (ø1/2 in)

ID ø12.7, ø15.88

ø12.7

Connecting pipe

(Liquid side)

ID ø15.88 mm (ø5/8 in) ID ø15.88 mm (ø5/8 in)

ID ø15.88

ø15.88

Connecting pipe

(Gas side)

OD ø28.58 mm (ø1-1/8 in)

ID ø28.58 mm (ø1-1/8 in)

OD ø28.58

ID ø28.58

⑤

Connecting elbow

(Gas side)

ID ø28.58 mm (ø1-1/8 in) ID ø28.58 mm (ø1-1/8 in)

ID ø28.58

OD ø9.52

OD ø12.7

ø28.58

ID ø15.88

ID ø28.58

EP200 1 - - - 1

EP250

EP300

*1 1 - - - 1 *2 1 - - - 1 *3 - 1 (ID ø12.7) - 1 1

*4 - 1 (ID ø12.7) - 1 1 EP350 - 1 (ID ø12.7) - 1 1 EP400 - 1 (ID ø15.88) - 1 1 EP450 - - 1 1 1 EP500 - - 1 1 1

⑥

Connecting pipe

(Gas side)

OD ø28.58 mm (ø1-1/8 in)

ID ø22.2 mm (ø7/8 in)

OD ø28.58

ID ø22.2

Connecting pipe

ID ø28.58 mm (ø1-1/8 in)

OD ø22.2 mm (ø7/8 in)

⑦

(Gas side)

ID ø28.58

ø22.2

OD ø22.2

OD ø12.7 mm (ø1/2 in)

⑧ ⑨ ⑩

Connecting pipe

(Liquid side)

ID ø9.52 mm (ø3/8 in)

Connecting pipe

(Liquid side)

ID ø12.7 mm (ø1/2 in)

OD ø9.52 mm (ø3/8 in)

ID ø9.52

OD ø12.7

OD ø9.52

ID ø12.7

Tie band

EP200 1 1 - - 2

EP250

EP300

*1 1 1 - - 2

*2 1 1 1 - 2

*3 - - - 1 2

*4 - - - - 2 EP350 - - - - 2 EP400 - - - - 2 EP450 - - - - 2 EP500 - - - - 2

*1 When the piping length from the outdoor unit to the farthest indoor unit is less than 90 m (295 ft) *2 When the piping length from the outdoor unit to the farthest indoor unit is 90 m (295 ft) or more *3 When the piping length from the outdoor unit to the farthest indoor unit is less than 40 m (131 ft) *4 When the piping length from the outdoor unit to the farthest indoor unit is 40 m (131 ft) or more *5 Used only when routing the pipes through the front of the unit *6 Used only when routing the pipes through the bottom of the unit

WT07281X03

GB-10

Page 13

6. Transporting the unit

When lifting the unit, pass the slings through the four designated sling holes.

- Improper lifting will cause the unit to topple or fall, resulting in serious injury.

・Always use two slings to lift up the unit. Each sling must be at least 8 m (26 ft) long and must be able to support the

weight of the unit.

・Put protective pads between slings and the unit where the slings touch the unit at the base to protect the unit from

being scratched.

・Put 50 mm (2 in) or thicker protective pads between slings and the unit where the slings touch the unit at the top of

the unit to protect the unit from being scratched and to avoid contact with the slings and the fan guard.

・Make sure that the angles between slings at the top are less than 40 degrees.

EP200 to EP250 EP300 to EP350

Ⓐ

≤ 40°

Ⓐ

≤ 40°

Ⓔ

Ⓑ

Ⓒ

EP400 to EP500

Ⓐ

Ⓑ

Ⓔ

≤ 40°

Ⓑ

Ⓒ

Ⓓ

Ⓐ Slings (Min. 8 m (26 ft) x 2) Ⓑ Protective pads (Minimum thickness: 50 mm

Ⓔ

(2 in)) (two each in the front and back)

(two each in the front and back)

Ⓓ Sling holes

(two each in the front and back)

Ⓔ Fan guard

Ⓓ

Ⓒ

WT07281X03

Ⓓ

GB-11

Page 14

7. Installation location

Do not install the unit where combustible gas may leak.

- If combustible gas accumulates around the unit, fire or explosion may result.

・Provide sufficient space around the unit for effective operation, efficient air movement, and ease of access for

maintenance.

・Note that refrigerant gas is heavier than air and will therefore tend to collect in low spots such as basements. ・When an indoor unit that draws in outside air exits near the outdoor unit, be careful not to affect the normal

operation of the indoor unit.

7-1. Single unit installation

(1) When all walls are within their height limits*.

* Height limit

Front/Right/Left Same height or lower than the overall height of the unit Rear 500 mm (19-11/16 in) or lower from the unit bottom

[mm (in)]

≤ Unit height

When the distance behind the unit (L2) needs to be small 450 (17-3/4) 100 (3-15/16) 50 (2) When the distance to the right or left (L3) needs to be small 450 (17-3/4) 300 (11-13/16) 15 (5/8)

≤ 500 (19-11/16)

Required minimum distance [mm (in)]

L1 (Front) L2 (Rear) L3 (Right/Left)

(2) When one or more walls exceed their height limits*.

When the wall(s) at the front and/ or the right/left exceed(s) their

When the wall at the rear exceeds its height limit

When all walls exceed their height limits

height limits

Unit height

≤ 500 (19-11/16)

≤ Unit height

500 (19-11/16)

Unit height

500 (19-11/16)

Unit height

Add the dimension that exceeds the height limit (shown as "h1" through "h3" in the figures) to L1, L2, and L3 as shown in the table below.

Required minimum distance [mm (in)]

L1 (Front) L2 (Rear) L3 (Right/Left) When the distance behind the unit (L2) needs to be small 450 (17-3/4) + h1 100 (3-15/16) + h2 50 (2) + h3 When the distance to the right or left (L3) needs to be small 450 (17-3/4) + h1 300 (11-13/16) + h2 15 (5/8) + h3

WT07281X03

GB-12

Page 15

(3) When there are overhead obstacles

≥ 45°

≥ 240 (9-1/2)

≥ 50 (2)

≥ 1000 (39-3/8)

Air outlet guide (not supplied)

7-2. Multiple unit installation

・When installing multiple units, make sure to take into consideration factors such as providing enough space for

people to pass through, ample space between blocks of units, and sufficient space for airflow. (The areas marked with Ⓐ in the figures below must be left open.)

・In the same way as with the single unit installation, add the dimension that exceeds the height limit (shown as "h1"

through "h3" in the figures) to L1, L2, and L3 as shown in the tables below.

・If there are walls in the front and rear of the block of units, up to six units (three units for units EP400 through

EP500) can be installed consecutively side by side, and a space of 1000 mm (39-3/8 in) or more must be left between each block of six units.

(1) Side-by-side installation

When the distances between the units (L4) need to be small

Ⓐ

When the distance behind the block of units (L2) needs to be small

Ⓐ

Unit height

500 (19-11/16)

Ⓐ

Required minimum distance [mm (in)]

L1 (Front) L2 (Rear) L4 (Between)

450 (17-3/4) + h1 300 (11-13/16) + h2 30 (1-3/16)

(2) Face-to-face installation

When there are walls in the front and rear of the block of units

Ⓐ

Unit height

500 (19-11/16)

Ⓐ

500 (19-11/16)

Unit height

Required minimum distance [mm (in)]

L1 (Front) L2 (Rear) L4 (Between)

450 (17-3/4) + h1 100 (3-15/16) + h2 100 (3-15/16)

When there is a wall on either the right or left side of the block of units

Unit height

Required minimum distance [mm (in)]

L1 (Front) L2 (Rear) L4 (Between)

450 (17-3/4) + h1 100 (3-15/16) + h2 450 (17-3/4)

WT07281X03

Required minimum distance [mm (in)]

L3 (Right/Left) L4 (Between)

15 (5/8) + h3 450 (17-3/4)

GB-13

Page 16

(3) Combination of face-to-face and side-by-side installations

When there are walls in the front and rear of the

When there are two walls in an L-shape

block of units

Ⓐ

500 (19-11/16)

Unit height

500 (19-11/16)

h2’

L2’

Ⓐ

Required minimum distance [mm (in)]

L2 (Right) L2' (Left) L4 (Between)

300 (11-13/16) + h2 300 (11-13/16) + h2' 900 (35-7/16)

Ⓐ Leave open in two directions.

Ⓐ

Required minimum distance [mm (in)]

L2 (Right) L3 (Right/Left) L4 (Between)

300 (11-13/16) + h2 1000 (39-3/8) + h3 900 (35-7/16)

500 (19-11/16)

Ⓐ

WT07281X03

GB-14

Page 17

8. Foundation work

Install the unit in accordance with the instructions to minimize the risk of damage from earthquakes and strong winds.

- Improper installation will cause the unit to topple, resulting in serious injury.

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

- Failure to do so will cause the unit to fall, resulting in serious injury.

・When performing the foundation work, make sure that the floor surface has sufficient strength and carefully route

pipes and wires in consideration of the water drainage that will be required when the unit is operated.

・If considering routing the pipes and wires across the bottom of the unit, make sure that the base is at least 100 mm

(3-15/16 in) high so that the through-holes will not be blocked.

・Provide a strong base of concrete or angle iron. If a stainless steel base is used, insulate the area between the

base and the outdoor unit by putting a rubber cushion or by applying an electrically insulated coating to prevent the base from rusting.

・Install the unit on a level surface. ・With some types of installation, unit vibration and sound will be transmitted to the floors and walls. In such locations,

take measures to prevent vibration (such as using anti-vibration rubber pads).

[mm (in)]

(1) Without a detachable leg

≤ 30 (1-3/16)≤ 30 (1-3/16)

Ⓑ

Ⓐ

Ⓒ

Ⓓ

(2) With a detachable leg

Ⓐ

Ⓒ Ⓒ

Ⓐ M10 anchor bolt (not supplied) Ⓑ (Incorrect installation) The corner section is not securely received. Ⓒ Fixing bracket for post-installed anchor bolts (not supplied) (To be fixed with three screws) Ⓓ Anti-vibration rubber pad

(The pad needs to be large enough to cover the entire width of each unit leg.)

Ⓔ Detachable leg

Ⓔ Ⓔ

・Make sure that the corner section is securely received. If not, the unit legs could bend. ・The length of the projecting part of the anchor bolt should be 30 mm (1-3/16 in) or less. ・This unit is not designed to be anchored with post-installed anchor bolts unless fixing brackets are installed at

the bottom four locations (six locations for units EP400 through EP500).

WT07281X03

GB-15

Page 18

・To remove the detachable legs on site, unscrew the screws shown in the figure below. If the unit leg coating is

damaged when the detachable leg is removed, repair the coating on site.

Ⓐ Screws

Ⓐ

・In abnormally harsh environments such as cold and/or windy areas, sufficient countermeasures to guard against

excessive wind and snow should be taken to ensure the unit’s correct operation. When the unit is expected to operate in cooling mode in conditions under 10°C (50°F), in snowy areas, in environments subject to strong winds or rain, install snow hoods of the following specifications (not supplied) as shown in the figure below.

Material: Galvanized steel plate 1.2T Painting: Overall painting with polyester powder Color: Munsell 5Y8/1 (same as the unit color) Size: Refer to the Data Book.

Ⓐ Outlet Ⓑ Inlet Ⓒ Snow hood Ⓓ Raised base

Ⓒ

Ⓑ

Ⓐ

Ⓒ

Ⓑ Ⓑ

Ⓓ Ⓓ

ⒸⒸ

Ⓒ

・Install the unit so that the wind will not blow directly against the inlet and outlet. ・If necessary, install the unit on a raised base of the following specifications (not supplied) to prevent damage

from snow.

Material: Angle iron (Build a structure that snow and wind can pass through.) Height: Expected maximum snowfall plus 200 mm (7-7/8 in) Width: Within the unit width (If the raised base is too wide, snow will accumulate on the raised base.)

・When the unit is used in a cold region and the heating operation is continuously performed for a long time when

the outside air temperature is below freezing, install a heater on the raised base or take other appropriate measures to prevent water from freezing on the raised base.

WT07281X03

GB-16

Page 19

9. Refrigerant piping work

Do not use any refrigerant other than the type indicated in the manuals for the unit and on the nameplate.

- Doing so will cause the unit or pipes to burst, or result in an explosion or fire during use, during repairs, or at the time of disposal of the unit.

- It may also be in violation of applicable laws.

- MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from the use of the wrong type of refrigerant.

After the installation has been completed, check for refrigerant leaks.

- If the refrigerant leaks, oxygen starvation may result. If the leaked refrigerant comes in contact with a heat source, toxic gas will be generated.

- Gas leak detectors for conventional refrigerants will not react to a refrigerant that does not contain chlorine.

- If the specified refrigerant is mixed with water, refrigerant oil, or another refrigerant, the refrigerant oil will deteriorate and the compressor will malfunction.

Do not use existing refrigerant piping.

9-1. Restrictions

・Existing refrigerant piping must not be used because the design pressure for systems using R410A is higher than

that for systems using other types of refrigerants.

・Do not install outdoor unit piping when it is raining. ・Do not use special detergents for washing piping. ・Always observe the restrictions on refrigerant piping (such as pipe size, pipe length, and vertical separation

distance) to prevent equipment failure or a decline in heating/cooling performance.

・Do not install solenoid valves to prevent oil backflow and compressor start-up failure. ・Do not install a sight glass because it may show improper refrigerant flow. If a sight glass is installed, inexperienced

technicians that use the glass may overcharge the refrigerant.

・Branching cannot be made after header branching.

Ⓐ Ⓐ

Ⓑ

Ⓐ From outdoor unit Ⓑ Cap Ⓒ Indoor unit

WT07281X03

GB-17

Page 20

・The pipe from multiple outdoor units must be installed so that oil will not accumulate in the pipe under certain

±15°

Ⓐ

conditions. Refer to the figures below for details.

* Small dots in the figures indicate branching points.

Ⓐ To indoor units

(1) The pipe from the outdoor units must be inclined downward to the indoor unit side. In the figure on the right,

because the pipe is inclined upward, the oil in the pipe accumulates when Unit 1 is in operation and Unit 3 is stopped.

Unit 1 Unit 3Unit 2Unit 1

Ⓐ

Unit 2

Unit 3

Ⓐ

(2) The distance between the unit bottom and the pipe (H) must be 0.2 m (7-7/8 in) or below. In the figure on the

right, because the distance is more than 0.2 m (7-7/8 in), the oil accumulates in Units 1 and 2 when Unit 3 is in operation and Units 1 and 2 are stopped.

Unit 1

Ⓐ

Unit 1

Ⓐ

H ≤ 0.2 m (7-7/8 in)

Unit 2

Unit 3

Ⓐ

H > 0.2 m (7-7/8 in)

Unit 2Unit 1

Unit 3

(3) The vertical separation between units (H) must be 0.1 m (3-15/16 in) or below. In the figure on the right,

because the distance is more than 0.1 m (3-15/16 in), the oil accumulates in Unit 1 when Unit 3 is in operation and Unit 1 is stopped.

Unit 2

Unit 1

Ⓐ

H ≤ 0.1 m (3-15/16 in)

Unit 3

Unit 1

Ⓐ

Unit 3Unit 2

H > 0.1 m (3-15/16 in)

(4) The vertical separation between units (H) must be 0.1 m (3-15/16 in) or below. In the figure on the right,

because the distance is more than 0.1 m (3-15/16 in), the oil accumulates in Unit 3 when Unit 1 is in operation and Unit 3 is stopped.

Unit 1

Ⓐ

Unit 2

H ≤ 0.1 m (3-15/16 in)

Unit 3

Unit 1

Ⓐ

Unit 2

Unit 3

H > 0.1 m (3-15/16 in)

・Make sure that the inclination tolerance of the Twinning Kit is ±15˚ to the ground to avoid unit damage.

Ⓐ Twinning Kit

WT07281X03

GB-18

Page 21

・If the length of the pipe between the branching point and the outdoor unit exceeds 2 m (6 ft), provide a trap within 2

m (6 ft) from the branching point. The trap must be at least 200 mm (7-7/8 in) in height. (gas pipe only) If there is no trap, oil can accumulate inside the pipe, causing a shortage of oil and may damage the compressor.

* Small dots in the figures indicate branching points.

Ⓑ

2 m (6 ft)

Ⓐ To indoor units Ⓑ Trap (gas pipe only) Ⓒ Gas pipe

Ⓐ

Ⓒ

≤ 2 m (6 ft)

Ⓐ

9-2. Pipe selection

- Contaminants on the inside of the refrigerant piping will cause the refrigerant oil to deteriorate and cause the compressor to malfunction.

Use refrigerant pipes for use with R410A refrigerant system. Piping for systems for use with other types of refrigerants may not be able to be used. Use refrigerant pipes with the thicknesses specified in the table below.

Size [mm (in)] Radial thickness [mm (mil)] Type

ø6.35 (ø1/4) 0.8 (32) Type-O ø9.52 (ø3/8) 0.8 (32) Type-O ø12.7 (ø1/2) 0.8 (32) Type-O

ø15.88 (ø5/8) 1.0 (40) Type-O

ø19.05 (ø3/4)

ø22.2 (ø7/8) 1.0 (40) Type-1/2H or H

ø25.4 (ø1) 1.0 (40) Type-1/2H or H ø28.58 (ø1-1/8) 1.0 (40) Type-1/2H or H ø31.75 (ø1-1/4) 1.1 (44) Type-1/2H or H ø34.93 (ø1-3/8) 1.2 (48) Type-1/2H or H ø41.28 (ø1-5/8) 1.4 (56) Type-1/2H or H

1.2 (48) Type-O

1.0 (40) Type-1/2H or H

WT07281X03

GB-19

Page 22

9-3. Twinning kit selection

9-3-1. Indoor unit twinning kit

Select a proper indoor unit twinning kit (sold separately) based on the total capacity of the downstream indoor units, using the table below as a reference.

Line branching

Total capacity of downstream indoor units Kit model

200 or below CMY-Y102SS-G2

201 to 400 CMY-Y102LS-G2 401 to 650 CMY-Y202S-G2

651 or above CMY-Y302S-G2

Line branching for the 1st branching point

Outdoor unit model Kit model

EP450 to EP650 CMY-Y202S-G2

EP700 to EP1350 CMY-Y302S-G2

Header branching

Total capacity of downstream indoor units Number of branches Kit model

200 or below 4 CMY-Y104-G 400 or below 8 CMY-Y108-G 650 or below 10 CMY-Y1010-G

* Use an adapter, if necessary, to connect a refrigerant pipe to a twinning pipe of a different diameter.

9-3-2. Outdoor unit twinning kit

Select a proper outdoor unit twinning kit (sold separately) based on the total capacity of the outdoor units, using the table below as a reference.

Total capacity of outdoor units Kit model

EP500 to EP600 CMY-Y100VBK3

EP650 to EP1350 CMY-Y300VBK3

9-4. Pipe connection example

・Example of pipe connection between outdoor units

Ⓐ

Ⓑ

Ⓐ

Ⓒ

Ⓐ On-site piping Ⓑ Twinning Kit Ⓒ The pipe section before the twinning pipe must

have at least 500 mm (19-11/16 in) of straight section.

WT07281X03

GB-20

Page 23

・Example of pipe connection between outdoor units and indoor units

EP200 to EP500YLM-A

Unit 1

Ⓐ

Ⓑ

Ⓒ

EP500 to EP600YSLM-A

Unit 1 Unit 2

Ⓐ Ⓐ

Ⓔ

Ⓐ

Ⓕ

Ⓑ

Ⓓ

Ⓒ Ⓒ

Ⓒ

Unit 1 Unit 2

Ⓐ Ⓐ

Ⓑ

Ⓒ

Ⓔ

Ⓑ

Ⓒ Ⓒ

Ⓓ

EP650 to EP1350YSLM-A

Unit 1 Unit 2 Unit 3

Ⓐ Ⓐ Ⓐ

Ⓔ

Ⓑ

Ⓒ

Ⓐ Outdoor unit Ⓑ 1st branching Ⓒ Indoor unit Ⓓ Cap Ⓔ Outdoor unit twinning kit Ⓕ Header branching

* The total length of A1, A2, A3, and A4 is less than 10 m (32 ft).

Unit 1 Unit 2 Unit 3

Ⓐ Ⓐ Ⓐ

Ⓒ

Ⓕ

Ⓔ

Ⓑ

Ⓒ Ⓒ

Ⓓ

WT07281X03

GB-21

Page 24

Pipes A, A1, A2, A3, A4 [mm]

Unit model

EP200YLM-A - - - ø9.52 ø22.2 - - - - - - - EP250YLM-A - - - ø9.52* EP300YLM-A - - - ø9.52*

Combination unit Pipe A Pipe A

Unit 1 Unit 2 Unit 3 Liquid Gas Liquid Gas Liquid Gas Liquid Gas Liquid Gas

ø22.2 - - - - - - - -

ø28.58 - - - - - - - -

Pipe A2*

Pipe A3*

Pipe A4

EP350YLM-A - - - ø12.7 ø28.58 - - - - - - - EP400YLM-A - - - ø12.7 ø28.58 - - - - - - - EP450YLM-A - - - ø15.88 ø28.58 - - - - - - - EP500YLM-A - - - ø15.88 ø28.58 - - - - - - - EP500YSLM-A EP250 EP250 - ø15.88 ø28.58 ø9.52 ø22.2 ø9.52 ø22.2 - - - EP550YSLM-A EP300 EP250 - ø15.88 ø28.58 ø12.7 ø28.58 ø9.52 ø22.2 - - - EP600YSLM-A EP300 EP300 - ø15.88 ø28.58 ø12.7 ø28.58 ø12.7 ø28.58 - - - EP650YSLM-A EP250 EP200 EP200 ø15.88 ø28.58 ø9.52 ø22.2 ø9.52 ø22.2 ø9.52 ø22.2 ø19.05 ø34.93 EP700YSLM-A EP300 EP200 EP200 ø19.05 ø34.93 ø12.7 ø28.58 ø9.52 ø22.2 ø9.52 ø22.2 ø19.05 ø34.93 EP750YSLM-A EP300 EP250 EP200 ø19.05 ø34.93 ø12.7 ø28.58 ø9.52 ø22.2 ø9.52 ø22.2 ø19.05 ø34.93 EP800YSLM-A EP300 EP300 EP200 ø19.05 ø34.93 ø12.7 ø28.58 ø12.7 ø28.58 ø9.52 ø22.2 ø19.05 ø34.93 EP850YSLM-A EP300 EP300 EP250 ø19.05 ø41.28 ø12.7 ø28.58 ø12.7 ø28.58 ø9.52 ø22.2 ø19.05 ø34.93 EP900YSLM-A EP300 EP300 EP300 ø19.05 ø41.28 ø12.7 ø28.58 ø12.7 ø28.58 ø12.7 ø28.58 ø19.05 ø34.93 EP950YSLM-A EP350 EP300 EP300 ø19.05 ø41.28 ø12.7 ø28.58 ø12.7 ø28.58 ø12.7 ø28.58 ø19.05 ø34.93 EP1000YSLM-A EP400 EP300 EP300 ø19.05 ø41.28 ø15.88 ø28.58 ø12.7 ø28.58 ø12.7 ø28.58 ø19.05 ø34.93 EP1050YSLM-A EP400 EP350 EP300 ø19.05 ø41.28 ø15.88 ø28.58 ø12.7 ø28.58 ø12.7 ø28.58 ø19.05 ø34.93 EP1100YSLM-A EP400 EP350 EP350 ø19.05 ø41.28 ø15.88 ø28.58 ø12.7 ø28.58 ø12.7 ø28.58 ø19.05 ø34.93 EP1150YSLM-A EP450 EP350 EP350 ø19.05 ø41.28 ø15.88 ø28.58 ø12.7 ø28.58 ø12.7 ø28.58 ø19.05 ø34.93 EP1200YSLM-A EP450 EP400 EP350 ø19.05 ø41.28 ø15.88 ø28.58 ø15.88 ø28.58 ø12.7 ø28.58 ø19.05 ø34.93 EP1250YSLM-A EP450 EP450 EP350 ø19.05 ø41.28 ø15.88 ø28.58 ø15.88 ø28.58 ø12.7 ø28.58 ø19.05 ø34.93 EP1300YSLM-A EP450 EP450 EP400 ø19.05 ø41.28 ø15.88 ø28.58 ø15.88 ø28.58 ø15.88 ø28.58 ø19.05 ø34.93 EP1350YSLM-A EP450 EP450 EP450 ø19.05 ø41.28 ø15.88 ø28.58 ø15.88 ø28.58 ø15.88 ø28.58 ø19.05 ø34.93

Pipes A, A1, A2, A3, A4 [in]

Unit model

EP200YLM-A - - - ø3/8 ø7/8 - - - - - - - EP250YLM-A - - - ø3/8* EP300YLM-A - - - ø3/8*

Combination unit Pipe A Pipe A

Unit 1 Unit 2 Unit 3 Liquid Gas Liquid Gas Liquid Gas Liquid Gas Liquid Gas

ø7/8 - - - - - - - -

ø1-1/8 - - - - - - - -

Pipe A2*

Pipe A3*

Pipe A4

EP350YLM-A - - - ø1/2 ø1-1/8 - - - - - - - EP400YLM-A - - - ø1/2 ø1-1/8 - - - - - - - EP450YLM-A - - - ø5/8 ø1-1/8 - - - - - - - EP500YLM-A - - - ø5/8 ø1-1/8 - - - - - - - EP500YSLM-A EP250 EP250 - ø5/8 ø1-1/8 ø3/8 ø7/8 ø3/8 ø7/8 - - - EP550YSLM-A EP300 EP250 - ø5/8 ø1-1/8 ø1/2 ø1-1/8 ø3/8 ø7/8 - - - EP600YSLM-A EP300 EP300 - ø5/8 ø1-1/8 ø1/2 ø1-1/8 ø1/2 ø1-1/8 - - - EP650YSLM-A EP250 EP200 EP200 ø5/8 ø1-1/8 ø3/8 ø7/8 ø3/8 ø7/8 ø3/8 ø7/8 ø3/4 ø1-3/8 EP700YSLM-A EP300 EP200 EP200 ø3/4 ø1-3/8 ø1/2 ø1-1/8 ø3/8 ø7/8 ø3/8 ø7/8 ø3/4 ø1-3/8 EP750YSLM-A EP300 EP250 EP200 ø3/4 ø1-3/8 ø1/2 ø1-1/8 ø3/8 ø7/8 ø3/8 ø7/8 ø3/4 ø1-3/8 EP800YSLM-A EP300 EP300 EP200 ø3/4 ø1-3/8 ø1/2 ø1-1/8 ø1/2 ø1-1/8 ø3/8 ø7/8 ø3/4 ø1-3/8 EP850YSLM-A EP300 EP300 EP250 ø3/4 ø1-5/8 ø1/2 ø1-1/8 ø1/2 ø1-1/8 ø3/8 ø7/8 ø3/4 ø1-3/8 EP900YSLM-A EP300 EP300 EP300 ø3/4 ø1-5/8 ø1/2 ø1-1/8 ø1/2 ø1-1/8 ø1/2 ø1-1/8 ø3/4 ø1-3/8 EP950YSLM-A EP350 EP300 EP300 ø3/4 ø1-5/8 ø1/2 ø1-1/8 ø1/2 ø1-1/8 ø1/2 ø1-1/8 ø3/4 ø1-3/8 EP1000YSLM-A EP400 EP300 EP300 ø3/4 ø1-5/8 ø5/8 ø1-1/8 ø1/2 ø1-1/8 ø1/2 ø1-1/8 ø3/4 ø1-3/8 EP1050YSLM-A EP400 EP350 EP300 ø3/4 ø1-5/8 ø5/8 ø1-1/8 ø1/2 ø1-1/8 ø1/2 ø1-1/8 ø3/4 ø1-3/8 EP1100YSLM-A EP400 EP350 EP350 ø3/4 ø1-5/8 ø5/8 ø1-1/8 ø1/2 ø1-1/8 ø1/2 ø1-1/8 ø3/4 ø1-3/8 EP1150YSLM-A EP450 EP350 EP350 ø3/4 ø1-5/8 ø5/8 ø1-1/8 ø1/2 ø1-1/8 ø1/2 ø1-1/8 ø3/4 ø1-3/8 EP1200YSLM-A EP450 EP400 EP350 ø3/4 ø1-5/8 ø5/8 ø1-1/8 ø5/8 ø1-1/8 ø1/2 ø1-1/8 ø3/4 ø1-3/8 EP1250YSLM-A EP450 EP450 EP350 ø3/4 ø1-5/8 ø5/8 ø1-1/8 ø5/8 ø1-1/8 ø1/2 ø1-1/8 ø3/4 ø1-3/8 EP1300YSLM-A EP450 EP450 EP400 ø3/4 ø1-5/8 ø5/8 ø1-1/8 ø5/8 ø1-1/8 ø5/8 ø1-1/8 ø3/4 ø1-3/8 EP1350YSLM-A EP450 EP450 EP450 ø3/4 ø1-5/8 ø5/8 ø1-1/8 ø5/8 ø1-1/8 ø5/8 ø1-1/8 ø3/4 ø1-3/8

*1 Use the ø12.7 (ø1/2) pipe if the piping length from the outdoor unit to the farthest indoor unit is 90 m (295 ft) or longer. *2 Use the ø12.7 (ø1/2) pipe if the piping length from the outdoor unit to the farthest indoor unit is 40 m (131 ft) or longer. *3 If the combination units 1, 2, and 3 are in a different order as listed in the table, make sure to use the pipes of appropriate size for the situation. *4 If the pipe length after the first branching point exceeds 40 m (131 ft) (≤ 90 m (295 ft)), use the one size larger liquid pipe for all pipes from indoor

units to the first branch.

*5 When the vertical separation between the indoor units is 15 m (49 ft) (≤ 30 m (98 ft)), use the one size larger liquid pipe for all pipes from the

lower indoor units to the first branch.

Pipes B,C,D [mm (in)] Pipes a,b,c,d,e [mm (in)]

Total capacity of indoor units

Pipe

Liquid Gas Liquid Gas

Capacity index of indoor unit

Pipe

140 or below ø9.52 (ø3/8) ø15.88 (ø5/8) 20, 25, 32, 40, 50 ø6.35 (ø1/4) ø12.7 (ø1/2)

141 to 200 ø9.52 (ø3/8) ø19.05 (ø3/4) 63, 71, 80, 100, 125, 140 ø9.52 (ø3/8) ø15.88 (ø5/8) 201 to 300 ø9.52 (ø3/8) ø22.2 (ø7/8) 200 ø9.52 (ø3/8) ø19.05 (ø3/4) 301 to 400 ø12.7 (ø1/2) ø28.58 (ø1-1/8) 250 ø9.52 (ø3/8) ø22.2 (ø7/8) 401 to 650 ø15.88 (ø5/8) ø28.58 (ø1-1/8) 651 to 800 ø19.05 (ø3/4) ø34.93 (ø1-3/8)

801 or above ø19.05 (ø3/4) ø41.28 (ø1-5/8)

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9-5. Piping connections and valve operations

Before heating the brazed sections, remove the gas and oil that are trapped in the pipes.

- Failure to do so may generate fire, resulting in serious injury.

Ventilate the room while servicing the unit.

- If the refrigerant leaks, oxygen deficiency may result. If the leaked refrigerant comes in contact with a heat source, toxic gas will be generated.

Store pipes indoors, and keep both ends of the pipes sealed until just before making a flare connection or brazing. (Store elbows and other joints in plastic bags.)

- If dust, dirt, or water enters the refrigerant lines, the refrigerant oil will deteriorate and the compressor will malfunction.

Keep the service valves closed until refrigerant charging is completed.

- Failure to do so will damage the unit.

Place a wet towel on the service valves before brazing the pipes to keep the temperature of the valves from rising above 120ºC (248ºF).

- Failure to do so may result in equipment damage.

Keep the flame out of contact with the cables and metal sheet when brazing the pipes.

- Failure to do so may result in burnout or malfunction.

Braze the pipes with a nitrogen purge to avoid oxidation.

- Oxidized flux inside the refrigerant pipes will cause the refrigerant oil to deteriorate and cause the compressor to malfunction.

9-5-1. Removing the pinched connecting pipes

The unit is shipped with the pinched connecting pipes attached to the liquid- and gas-side service valves to prevent gas leakage. Take the following steps ① through ③ to remove the pinched connecting pipes before connecting refrigerant pipes to the outdoor unit.

① Check that the service valves are fully closed (turned clockwise all the way). ② Remove the gas in the pinched connecting pipes, and drain out all the refrigerant oil. (See Ⓔ below.) ③ Remove the pinched connecting pipes. (See Ⓕ below.)

Ⓒ Ⓐ

Ⓓ

Ⓕ

Ⓔ

<A> Refrigerant service valve (liquid/brazed) <B> Refrigerant service valve (gas/brazed) <C> Refrigerant service valve (low-pressure gas/brazed)

Used only when a separately-sold unit is attached. Refer to the Installation Manual of the unit for details.

<D> Refrigerant service valve (high-pressure gas/brazed)

Ⓐ

Ⓑ Ⓒ

Used only when a separately-sold unit is attached. Refer to the Installation Manual of the unit for details.

Ⓐ Valve shaft

The unit is shipped with the valve closed. Keep the valve closed while connecting pipes or evacuating the system. Open the valve upon completion of this work.

Turn the shaft counterclockwise as far as it will go (90˚) to open the valve, and clockwise to close

it.

Ⓑ Stopper pin

Prevents the shaft from turning 90˚ or more.

Through the service ports, you can charge refrigerant, remove the gas in the pinched connecting pipes, or evacuate the system.

Ⓓ Cap

Remove the cap before turning the shaft. Put the cap back on upon completion of all work.

Ⓔ Severed section of the pinched connecting pipe Ⓕ Brazed section of the pinched connecting pipe

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9-5-2. Connecting pipes

・The refrigerant pipe from the outdoor unit is branched at the pipe end, and each branch is then connected to an

indoor unit.

Connecting method

Indoor unit Brazed or flared

Outdoor unit

Branched section Brazed

・Refer to section 5 "Package contents" for details about the supplied connecting pipes. ・When connecting pipes, make sure the service valves are completely closed. ・Commercially available pipes often contain dust or debris. Always blow them clean with a dry inert gas. ・Take care to prevent dust, water or other contaminants from entering the pipes during installation. ・Reduce the number of bending portions as much as possible, and make the bending radius as big as possible. ・Do not use any commercially available anti-oxidizing agents since they may cause pipe corrosion and degrading of

the refrigerant oil. Please contact Mitsubishi Electric for more details.

・Make sure that the pipes are not in contact with each other, unit panels, or base plates.

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

Gas pipe Brazed

Liquid pipe Brazed

Ⓓ

Ⓒ

Ⓑ

Ⓐ

Ⓔ

Ⓘ

Ⓖ

Ⓕ

Ⓐ Refrigerant service valve (liquid) Ⓑ Refrigerant service valve (gas) Ⓒ Refrigerant service valve (low-pressure gas) Ⓓ Refrigerant service valve (high-pressure gas) Ⓔ Supplied connecting pipes ①②③ (liquid side) Ⓕ Supplied connecting pipes ④⑥ (gas side) Ⓖ Supplied connecting elbow ⑤ (gas side) Ⓗ Supplied connecting pipe ⑦ (gas side) Ⓘ Supplied connecting pipes ⑧⑨ (liquid side) Ⓙ On-site piping

Ⓙ

Ⓓ

Ⓒ

Ⓑ

Ⓐ

Ⓔ

Ⓘ Ⓙ

Ⓗ

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・Connecting the on-site piping and the service valve piping

When routing the pipes through the front of the unit

Liquid side Gas side

EP200

EP250

EP300

EP350 EP400 EP450 EP500

Use the supplied connecting pipe ①. Expand the end of the on-site piping. (ID ø9.52 mm (ø3/8 in))

Use the supplied connecting pipes ① and ⑧.

Expand the end of the on-site piping. (ID ø12.7 mm (ø1/2 in)) Use the supplied connecting pipes ② and ⑨.

Expand the end of the on-site piping. (ID ø9.52 mm (ø3/8 in))

Use the supplied connecting pipe ②. Expand the end of the on-site piping. (ID ø12.7 mm (ø1/2 in))

Use the supplied connecting pipe ③.

When routing the pipes through the bottom of the unit

Liquid side Gas side

EP200

EP250

EP300

EP350 EP400

EP450

EP500

Sever the supplied connecting pipe ① as shown in the figure below with a pipe cutter.

Expand the end of the on-site piping. (ID ø9.52 mm (ø3/8 in)) Sever the supplied connecting pipe ① as shown in the figure below with

a pipe cutter, and connect it to connecting pipe ⑧. Expand the end of the on-site piping. (ID ø12.7 mm (ø1/2 in))

Sever the supplied connecting pipe ② as shown in the figure below with

a pipe cutter, and connect it to connecting pipe ⑨. Expand the end of the on-site piping. (ID ø9.52 mm (ø3/8 in))

Sever the supplied connecting pipe ② as shown in the figure below with a pipe cutter. Expand the end of the on-site piping. (ID ø12.7 mm (ø1/2 in))

Sever the supplied connecting pipe ③ as shown in the figure below with a pipe cutter. Expand the end of the on-site piping. (ID ø15.88 mm (ø5/8 in))

Use the supplied connecting elbow ⑤ and connecting pipe ⑥.

Use the supplied connecting elbow ⑤ and connecting pipe ④.

Use the supplied connecting pipe ⑦. Expand the end of the on-site piping. (ID ø22.2 mm (ø7/8 in))

Expand the end of the on-site piping. (ID ø28.58 mm (ø1-1/8 in))

<Reference> Size of refrigerant pipes

On-site piping [mm (in)] Service valve piping [mm (in)]

Liquid Gas Liquid Gas

EP200 ø9.52 (ø3/8)

EP250

EP300

EP350 ø12.7 (ø1/2) EP400 ø12.7 (ø1/2)

EP500 ø15.88 (ø5/8)

*1 ø9.52 (ø3/8) *2 ø12.7 (ø1/2) *3 ø9.52 (ø3/8)

ø22.2 (ø7/8) ø9.52 (ø3/8)

ø12.7 (ø1/2)*4 ø12.7 (ø1/2)

ø28.58 (ø1-1/8)

ø15.88 (ø5/8)EP450 ø15.88 (ø5/8)

ø28.58 (ø1-1/8)

<Reference> Severed section

Ⓐ Pipe section to be cut (Use a pipe cutter.) Ⓑ Service valve side

18 (23/32)

Ⓑ

Ⓐ

20 (26/32)

Ⓑ

25 (1)

Ⓑ

ⒶⒶ

[mm (in)]

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Connecting pipe ① Connecting pipe ② Connecting pipe ③

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Page 28

・When expanding the on-site piping, satisfy the minimum insertion depth requirement as follows.

Ⓕ

Pipe size [mm (in)] Minimum insertion depth [mm (in)]

ø5 (ø1/4) or more, less than ø8 (ø13/8) 6 (1/4)

ø8 (ø13/8) or more, less than ø12 (ø1/2) 7 (5/16)

ø12 (ø1/2) or more, less than ø16 (ø11/16) 8 (3/8)

ø16 (ø11/16) or more, less than ø25 (ø1) 10 (7/16)

ø25 (ø1) or more, less than ø35 (ø1-7/16) 12 (1/2)

ø35 (ø1-7/16) or more, less than ø45 (ø1-13/16) 14 (9/16)

9-5-3. Sealing the openings around the pipes

Seal all openings around pipes and wires to keep out small animals, rainwater, or snow.

- Failure to do so may result in current leakage, electric shock, or damage to the unit.

Ⓐ Example of closure materials (not supplied) Ⓑ Fill the openings

Ⓐ Ⓑ

9-6. Air-tightness test

Do not use oxygen, flammable gas, or a refrigerant containing chlorine for air-tightness testing.

- Doing so may result in an explosion. Chlorine will deteriorate the refrigerant oil.

After refrigerant pipe installation is completed, check the system for leaks by conducting an air-tightness test. If there is a leak, the composition of the refrigerant will change and the performance will drop.

<Air-tightness test procedures>

① Make sure the service valves are closed. ② Add pressure to the refrigerant pipes through the service ports of the liquid and gas pipes.

* Pressurize to the design pressure (4.15 MPa) using nitrogen gas.

③ If the pressure holds for one day and does not decrease, the pipes have passed the test and there are no leaks.

If the pressure decreases, there is a leak. Look for the source of the leak by spraying a bubbling agent (e.g., Gupoflex) on the flared or brazed sections.

④ Wipe off the bubbling agent.

Ⓐ Nitrogen gas

Ⓑ

Ⓒ

Ⓐ

Ⓓ Ⓔ

Ⓘ

Ⓙ

Ⓑ To indoor unit

Ⓖ

Ⓗ

Ⓔ High pressure knob Ⓕ Service valve Ⓖ Liquid piping Ⓗ Gas piping Ⓘ Outdoor unit Ⓙ Service port

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9-7. Thermal insulation for pipes

Ⓒ

Ⓑ

Ⓔ

Insulate pipes to prevent condensation.

- Condensation may collect and drip from the unit onto the ceiling or floor.

Insulate the liquid and gas pipes separately with polyethylene foam insulation materials. Inadequate insulation may cause condensation to drip. Pipes in the ceiling are especially vulnerable to condensation and require adequate insulation.

9-7-1. Insulation material

・Check that the insulation materials meet the standards in the table below.

Pipe size [mm (in)]

ø6.35 (ø1/4)–ø25.4 (ø1) ø28.58 (ø1-1/8)–ø41.28 (ø1–5/8)

Thickness [mm (in)] Min. 10 (7/16) Min. 15 (5/8)

Heat resistance Min. 120°C (248°F)

* The insulation thickness may need to be increased in high-temperature/humidity conditions. * Even when specifications are defined by your client, the standards in the table should be met.

Ⓑ

Ⓐ

Ⓓ

Insulation material A

Outer covering B

* If a polyethylene cover is used as an outer covering, asphalt roofing is not necessary.

Ⓔ

Glass fiber + Steel wire Adhesive + Heat-resistant polyethylene foam + Adhesive tape Indoor Vinyl tape Under the floor and exposed Waterproof hemp cloth + Bronze asphalt Outdoor Waterproof hemp cloth + Zinc plate + Oily paint

Ⓐ Steel wire Ⓑ Pipe Ⓒ Oily mastic asphalt or asphalt Ⓓ Insulation material A Ⓔ Outer covering B

・Do not insulate the electric wires.

Ⓐ

Ⓒ

Ⓔ

Ⓓ

Ⓔ

Ⓑ

Ⓒ

Ⓓ

Ⓐ Liquid pipe Ⓑ Gas pipe

Ⓐ

・Make sure that the pipe connections all the way from the indoor unit are properly insulated.

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9-7-2. Insulation for the section of the pipe that goes through a wall

Ⓓ

(1) Inner wall (concealed) (2) Outer wall (3) Outer wall (exposed)

Ⓐ Ⓑ

Ⓒ

Ⓐ

Ⓑ

Ⓔ

Ⓑ

Ⓗ

(4) Floor (waterproof) (5) Rooftop pipe shaft (6) Protecting the penetrating parts in a fire limit zone

or through a parting wall

Ⓗ

1000

(39-3/8)

Ⓘ

Ⓐ

1000

(39-3/8)

[mm (in)]

Ⓕ

Ⓖ

Ⓑ

Ⓐ Sleeve Ⓑ Insulation material Ⓒ Lagging Ⓓ Caulking material Ⓔ Band Ⓕ Waterproof layer Ⓖ Sleeve with a flange Ⓗ Caulk with a nonflammable material such as mortar. Ⓘ Nonflammable insulation material

Ⓑ

Ⓒ Ⓕ

・When caulking the gaps with mortar, cover the section of the pipe that goes through the wall with a metal sheet to

prevent the insulation material from sagging. For this section, use nonflammable insulation and covering materials. (Vinyl tape should not be used.)

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9-8. Evacuation of the system

Do not purge the air using refrigerant. Use a vacuum pump to evacuate the system.

- Residual gas in the refrigerant lines will cause bursting of the pipes or an explosion.

Use a vacuum pump with a check valve.

- If the vacuum pump oil flows back into the refrigerant lines, the refrigerant oil may deteriorate and the compressor may malfunction.

① Evacuate the system from both service ports, using a vacuum pump with the service valves closed. ② After the vacuum reaches 650 Pa, continue evacuation for at least one hour. ③ Stop the vacuum pump and leave it for an hour. ④ Verify that the vacuum has not increased by more than 130 Pa. ⑤ If the vacuum has increased by more than 130 Pa, water infiltration is suspected. Pressurize the system with dry

nitrogen gas up to 0.05 MPa. Repeat ① though ⑤ until the vacuum is increased by 130 Pa or below. If the results persist, then perform the "Triple Evacuation" below.

① Evacuate the system to 533 Pa from both service ports, using a vacuum pump. ② Pressurize the system with dry nitrogen gas up to 0 Pa from the discharge service port. ③ Evacuate the system to 200 Pa from the suction service port, using a vacuum pump. ④ Pressurize the system with dry nitrogen gas up to 0 Pa from the discharge service port. ⑤ Evacuate the system from both service ports, using a vacuum pump. ⑥ After the vacuum reaches 66.7 Pa, stop the vacuum pump and leave it for an hour. A vacuum of 66.7 Pa must

be maintained for at least one hour.

⑦ Verify that the vacuum has not increased for at least 30 minutes.

Ⓐ Gauge manifold Ⓑ Low pressure knob Ⓒ High pressure knob Ⓓ Service valve Ⓔ Liquid piping Ⓕ Gas piping Ⓖ Service port Ⓗ Three-way joint Ⓘ Valve (vacuum pump) Ⓙ Valve (for charging refrigerant) Ⓚ Refrigerant tank Ⓛ Scale Ⓜ Vacuum pump Ⓝ To indoor unit Ⓞ Outdoor unit

Ⓝ

Ⓐ

Ⓑ Ⓒ

Ⓓ

Ⓔ

Ⓕ

Ⓞ

Ⓖ

Ⓗ

Ⓚ

Ⓘ

Ⓜ

Ⓙ

Ⓛ

・Use a scale that can measure down to 0.1 kg (0.1 oz). ・Recommended vacuum gauge: ROBINAIR 14830A Thermistor Vacuum Gauge or Micron Gauge ・Do not use a gauge manifold to measure the vacuum pressure. ・Use a vacuum pump capable of attaining a vacuum of 65 Pa (abs) within five minutes of operation.

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9-9. Additional refrigerant charge

Charge refrigerant in a liquid state.

- Charging refrigerant in the gaseous state will change the composition of the refrigerant and lead to a performance drop.

Do not use a charging cylinder when charging refrigerant.

- The use of a charging cylinder may change the composition of the refrigerant and lead to a performance drop.

The amount of refrigerant that is shown in the table below is factory-charged in the outdoor units. The amount necessary for extended piping is not included and needs to be added on site.

Unit model Factory-charged amount [kg (oz)] Unit model Factory-charged amount [kg (oz)]

EP200 7.5 (265) EP400 11.8 (417) EP250 7.5 (265) EP450 11.8 (417) EP300 10.3 (364) EP500 11.8 (417) EP350 10.3 (364)

The amount of refrigerant that is shown in the table below is the maximum amount to be added on site.

Unit model Maximum amount to be added [kg (oz)] Unit model Maximum amount to be added [kg (oz)] EP200YLM 22.3 (786) EP500YSLM 47.0 (1659) EP250YLM 29.7 (1048) EP550YSLM 51.3 (1811) EP300YLM 32.7 (1152) EP600YSLM 53.9 (1900) EP350YLM 33.6 (1184) EP650YSLM 56.5 (1992) EP400YLM 37.2 (1311) EP700YSLM 68.9 (2430) EP450YLM 45.0 (1589) EP750YSLM 68.9 (2430) EP500YLM 45.9 (1621) EP800YSLM 71.4 (2519)

EP850YSLM 73.2 (2583) EP900YSLM 75.7 (2671)

EP950YSLM 75.7 (2671) EP1000YSLM 80.7 (2846) EP1050YSLM 80.7 (2846) EP1100YSLM 80.7 (2846) EP1150YSLM 80.7 (2846) EP1200YSLM 83.8 (2957) EP1250YSLM 83.8 (2957) EP1300YSLM 87.0 (3068) EP1350YSLM 87.0 (3068)

Both refrigerant overcharge and undercharge will cause problems. Charge the system with the proper amount of refrigerant. Record the added refrigerant amount on the label attached to the control box panel for future servicing.

9-9-1. Calculation of the amount of additional refrigerant

・The amount of refrigerant to be added depends on the size and the total length of the liquid piping. ・Calculate the amount of refrigerant to be charged according to the formula below. ・Round up the calculation result to the nearest 0.1 kg (0.1 oz).

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(1) Units "m" and "kg"

・When the piping length from the outdoor unit to the farthest indoor unit is 30.5 m (100 ft) or shorter

Amount of additional charge (kg)

ø19.05 total length

× 0.29 (kg/m)

ø15.88 total length

× 0.2 (kg/m)

ø12.7 total length

× 0.12 (kg/m)

ø9.52 total length

× 0.06 (kg/m)

ø6.35 total length

× 0.024 (kg/m)

Outdoor unit

model EP200 0 80 or below 2.0 EP250 0 81 to 160 2.5 EP300 0 161 to 330 3.0 EP350 0 331 to 390 3.5 EP400 2.0 391 to 480 4.5 EP450 2.0 481 to 630 5.0 EP500 2.0 631 to 710 6.0

Amount (kg)

Total capacity of connected

indoor units

711 to 800 8.0 801 to 890 9.0

891 to 1070 10.0

1071 to 1250 12.0

1251 or above 14.0

Amount (kg)

・When the piping length from the outdoor unit to the farthest indoor unit is longer than 30.5 m (100 ft)

Amount of additional charge (kg)

ø19.05 total length

× 0.26 (kg/m)

Outdoor unit

model EP200 0 80 or below 2.0 EP250 0 81 to 160 2.5

EP300 0 161 to 330 3.0 EP350 0 331 to 390 3.5 EP400 2.0 391 to 480 4.5 EP450 2.0 481 to 630 5.0 EP500 2.0 631 to 710 6.0

ø15.88 total length

× 0.18 (kg/m)

Amount (kg)

ø12.7 total length

× 0.11 (kg/m)

Total capacity of connected

indoor units

711 to 800 8.0 801 to 890 9.0

891 to 1070 10.0

1071 to 1250 12.0

1251 or above 14.0

ø9.52 total length

× 0.054 (kg/m)

Amount (kg)

ø6.35 total length

× 0.021 (kg/m)

Outdoor unit model: EP300 Total capacity of connected indoor units: 361

* Refer to the pipe connection examples in section 9-4 for the pipes marked with the letters below.

A: ø12.7; 40 m B: ø9.52; 10 m C: ø9.52; 15 m D: ø9.52; 10 m a: ø9.52; 10 m b: ø9.52; 5 m c: ø6.35; 10 m d: ø6.35; 10 m e: ø9.52; 10 m

The total length of each liquid piping is as follows: ø12.7 total length: 40 (A) ø9.52 total length: 10 (B) + 15 (C) + 10 (D) + 10 (a) + 5 (b) + 10 (e) = 60 ø6.35 total length: 10 (c) + 10 (d) = 20

Therefore, when the piping length from the outdoor unit to the farthest indoor unit is longer than 30.5 m (100 ft), Amount of additional charge = (40 × 0.11) + (60 × 0.054) + (20 × 0.021) + 0 + 3.5

= 11.6 kg (Fractions are rounded up.)

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Page 34

(2) Units "ft" and "oz"

・When the piping length from the outdoor unit to the farthest indoor unit is 30.5 m (100 ft) or shorter

Amount of additional charge (oz)

ø3/4 total length

× 3.1 (oz/ft)

ø5/8 total length

× 2.15 (oz/ft)

ø1/2 total length

× 1.29 (oz/ft)

ø3/8 total length

× 0.65 (oz/ft)

ø1/4 total length

× 0.26 (oz/ft)

Outdoor unit

model EP200 0 80 or below 71 EP250 0 81 to 160 89 EP300 0 161 to 330 106 EP350 0 331 to 390 124 EP400 71 391 to 480 160 EP450 71 481 to 630 177 EP500 71 631 to 710 212

Amount (oz)

Total capacity of connected

indoor units

711 to 800 283 801 to 890 318

891 to 1070 353

1071 to 1250 424

1251 or above 494

Amount (oz)

・When the piping length from the outdoor unit to the farthest indoor unit is longer than 30.5 m (100 ft)

Amount of additional charge (oz)

ø3/4 total length

× 2.80 (oz/ft)

Outdoor unit

model EP200 0 80 or below 71 EP250 0 81 to 160 89

EP300 0 161 to 330 106 EP350 0 331 to 390 124 EP400 71 391 to 480 160 EP450 71 481 to 630 177 EP500 71 631 to 710 212

ø5/8 total length

× 1.94 (oz/ft)

Amount (oz)

ø1/2 total length

× 1.19 (oz/ft)

Total capacity of connected

indoor units

711 to 800 283 801 to 890 318

891 to 1070 353

1071 to 1250 424

1251 or above 494

ø3/8 total length

× 0.58 (oz/ft)

Amount (oz)

ø1/4 total length

× 0.23 (oz/ft)

Outdoor unit model: EP300 Total capacity of connected indoor units: 361

* Refer to the pipe connection examples in section 9-4 for the pipes marked with the letters below.

A: ø1/2; 131 ft B: ø3/8; 32 ft C: ø3/8; 49 ft D: ø3/8; 32 ft a: ø3/8; 32 ft b: ø3/8; 16 ft c: ø1/4; 32 ft d: ø1/4; 32 ft e: ø3/8; 32 ft

The total length of each liquid piping is as follows: ø1/2 total length: 131 (A) ø3/8 total length: 32 (B) + 49 (C) + 32 (D) + 32 (a) + 16 (b) + 32 (e) = 193 ø1/4 total length: 32 (c) + 32 (d) = 64

Therefore, when the piping length from the outdoor unit to the farthest indoor unit is longer than 30.5 m (100 ft), Amount of additional charge = (131 × 1.19) + (193 × 0.58) + (64 × 0.23) + 0 + 124

= 406.6 oz (Fractions are rounded up.)

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9-9-2. Charging additional refrigerant

Charge the calculated amount of refrigerant in the liquid state to the unit through the service port after the completion of piping work. Upon completion of all work, securely tighten all service port caps and shaft caps to prevent refrigerant leakage.

・Do not vent the refrigerant into the atmosphere. ・Refer to the table below for the appropriate tightening torque.

Pipe size [mm (in)] Shaft cap (N·m) Shaft (N·m) Size of hexagonal wrench [mm (in)] Service port cap (N·m)

ø9.52 (ø3/8) 15 6 4 (3/16)

ø12.7 (ø1/2) 20 9 4 (3/16) ø15.88 (ø5/8) 25 15 6 (1/4) ø19.05 (ø3/4) 25 30 6 (1/4)

ø25.4 (ø1) 25 30 10 (7/16)

ø28.58 (ø1-1/8) 25 - - 16

・If the refrigerant tank does not have a siphon pipe, charge the liquid refrigerant with the tank upside-down as shown

in the figure below.

Ⓐ

Ⓐ Siphon pipe

・After evacuation and refrigerant charging, ensure that the service valves are fully open. Do not operate the unit

with the service valves closed.

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10. Electrical work

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.

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.

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・Wiring example

3N~380–415 V L1, L2, L3, N

~220–240 V L, N

ⒷⒶ

Ⓒ

Ⓐ 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)]

Outdoor unit

Total operating current of the indoor units

Power

cable

Power cable

after branching

point

Earth

EP200 4.0 (12) – 4.0 (12)

EP250 4.0 (12) – 4.0 (12)

EP300 4.0 (12) – 4.0 (12)

EP350 6.0 (10) – 6.0 (10)

EP400 10.0 (8) – 10.0 (8)

EP450 10.0 (8) – 10.0 (8)

EP500 10.0 (8) – 10.0 (8)

F0 ≤ 16 A *

F0 ≤ 25 A *

F0 ≤ 32 A *

1.5 (16) 1.5 (16) 1.5 (16)

2.5 (14) 2.5 (14) 2.5 (14)

4.0 (12) 4.0 (12) 4.0 (12)

Earth leakage breaker

wire

30 A 100 mA 0.1 sec. or less

40 A 100 mA 0.1 sec. or less

60 A 100 mA 0.1 sec. or less

20 A current sensitivity

30 A current sensitivity

40 A current sensitivity

*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))

Local switch (A)

Capacity Fuse

Overcurrent

breaker

(NFB) (A)

Maximum

allowable system

impedance

25 25 30 (IEC 61000-3-3)

32 32 30 (IEC 61000-3-3)

40 40 40 0.25 Ω

63 63 60 0.22 Ω

63 63 60 0.19 Ω

63 63 60 0.15 Ω

16 16 20 (IEC 61000-3-3)

25 25 30 (IEC 61000-3-3)

32 32 40 (IEC 61000-3-3)

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Indoor unit V1 V2

Type 1

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.

<Example of "F2" calculation> Conditions: PEFY-VMS × 4 units, PEFY-VMA × 1 unit, "C" = 8 (See the sample chart.)

F2 = 18.6 × 4/8 + 38 × 1/8

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

PLFY-VBM, PMFY-VBM, PEFY-VMS, PCFY-VKM, PKFY-VHM, PKFY-VKM, PFFY-VKM, PFFY-VLRMM

= 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

18.6 2.4

Sample chart

6000

600

Tripping Time [s]

0.1

0.01 1

Multiples of rated tripping current

SAMPLE

1086432

・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.

*1 Ssc

Model Ssc (MVA) EP200 1.39 EP250 1.56 EP300 1.86 EP350 2.48 EP400 2.77 EP450 3.28 EP500 4.01

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10-3. Control cable specifications

・Transmission cable

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

The maximum allowable length of transmission cables via outdoor units (both centralized control transmission cables

Remarks

* 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.

and indoor-outdoor transmission cables) is 500 m (1640 ft). 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).

(AWG 16), or ø1.2 mm or above

・Remote controller cable

ME remote controller cable MA remote controller cable Type 2-core sheathed cable (unshielded) CVV Size 0.3–1.25 mm

Max. 10 m (32 ft)

Length

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

(AWG 16) shielded cable.

(AWG 22–16) (0.75–1.25 mm2 (AWG 18–16) if a simple remote controller is connected)

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

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).

Main unit OC – Sub unit OS1, OS2 –

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・System configuration example

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

(1) When ME remote controllers are connected

* Move the power jumper from

CN41 to CN40. *

* SW5-1: ON *

Ⓐ

Group 1 Group 3 Group 5

* Leave the power jumper

connected to CN41.

* SW5-1: ON *

Ⓒ

Ⓑ

*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) Transmission cables L

Remote controller cables

1, L3 + L4, L3 + L5, L6, L2 + L6 ≤ 200 m (656 ft)

1, ℓ2, ℓ3, ℓ4 ≤ 10 m (32 ft)

ℓ

* 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.

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(2) When MA remote controllers are connected

* Move the power jumper from

CN41 to CN40. *

* SW5-1: ON *

Ⓐ

Group 1 Group 3 Group 5

* Leave the power jumper

connected to CN41.

* SW5-1: ON *

Ⓒ

Ⓑ

*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) Transmission cables L Remote controller cables m

1, L3 + L4, L6, L2 + L6 ≤ 200 m (656 ft)

1 + m2, m1 + m2 + m3 + m4 ≤ 200 m (656 ft)

(3) When a transmission booster unit is connected

Earth

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

Remote controller cables

WT07281X03

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)

1, ℓ2 ≤ 10 m (32 ft)

ℓ

* 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.

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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

・Punch out the knockout holes at the bottom of the front panel with a hammer. Use the appropriate knockout hole

according to the size of the power cable, referring to the table below.

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

Ⓐ

Ⓑ

Ⓒ

・If there are any gaps around the power cable, please be sure to fill these in with a suitable material. ・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.

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10-5-2. Fixing the cables in place

Power supply terminal block

Cable strap

M-NET board

Rubber bushing

Tie band

(Supplied)

Unit wiring

Power cable (not supplied)

Transmission cable

(not supplied)

① Thread the power cable through the rubber bushing on the left side. (See *1 and *2 below.) ② Thread the unit wiring (sensor wiring) and the transmission cable through the rubber bushing on the right side.

(See *

and *2 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 *

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

below.)

Transmission terminal block

Cable strap

Tie band (Supplied)

Rubber bushing

Unit wiring (sensor wiring)

Top view

Cut

Rubber bushing (oval part)

Cables are coming out of the rubber bushing.

Wiring

Cross-sectional view

Top view

Wiring

Rubber bushing

*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

guard.

Sheet metal on the guard

Rubber bushing

Sheet metal on the guard

Rubber bushing

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

Tie band

Overlapped rubber bushing

Approx. 20 mm (13/16 in)

Cut on the rubber bushing

There is a gap in the rubber bushing.

Cut on the 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.

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10-5-3. Connecting the cables

Ⓒ

Ⓓ

Ⓐ Control box Ⓑ Power supply terminal block (TB1)

Ⓐ

Ⓐ Ⓑ

Ⓒ

Ⓑ

L1 L2 L3 N

Ⓑ

Ⓐ

Ⓔ

Ⓐ Power cables, transmission cables Ⓑ Daisy-chain (transmission cables only) Ⓒ Terminal blocks (TB1, TB3, TB7) Ⓓ Make an alignment mark. Ⓔ Install the ring terminals back to back.

Ⓓ Ⓔ

Ⓐ Terminal block with loose screws Ⓑ Properly installed terminal block Ⓒ Spring washers must be parallel to the terminal block.

・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. ・When connecting cables to TB7, check that the voltage is 20 VDC or below. ・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.

(TB3)

Ⓔ Terminal block for centralized control transmission

cable (TB7)

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.*

*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.)

Connect the shield to the S terminal.

③ 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.

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.

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10-6. Address setting

・Set the address setting switch as follows.

Address setting method Address

Indoor unit (Main, Sub)

Outdoor unit (OC, OS1, OS2)

ME remote controller

MA remote controller Address setting is not required. (The Main/Sub setting is required.) –

* 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).

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

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

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.

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.

01 to 50

51 to 100

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11. Test run

11-1. Before a test run

After the wiring work has been completed, measure the insulation resistance, and make

sure that it reads at least 1 MΩ.

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

Turn on the power at least 12 hours before starting operation. Keep the power turned on throughout the operating season.

- Insufficient energizing will result in malfunction.

・Before performing a test run, turn off the power to the outdoor unit, and disconnect the power cable from the power

supply terminal block to measure the insulation resistance.

・Measure the insulation resistance between the power supply terminal block and the earth with a 500 V ohmmeter,

and make sure it is at least 1 MΩ.

・If the insulation resistance is 1 MΩ or above, connect the power cable to the power supply terminal, and turn on the

power at least 12 hours before starting operation. If the insulation resistance is below 1 MΩ, do not operate the unit,

and check the compressor for a earth fault.

・While the unit is turned on, the compressor will remain energized even when it is stopped. ・The insulation resistance between the power supply terminal block and the earth may drop to near 1 MΩ

immediately after installation or when the main power to the unit has been turned off for a long time because of the stagnation of refrigerant in the compressor.

・By turning on the main power and energizing the unit for 12 hours or longer, the refrigerant in the compressor will

evaporate and the insulation resistance will rise.

・Do not apply an ohmmeter voltage to the terminal block for transmission cables. Doing so will damage the control

board.

・Do not measure the insulation resistance of the transmission terminal block of the unit remote controller. ・Check for refrigerant leakage and for loose power cables and transmission cables. ・Check that the liquid and gas side service valves are fully open. Tighten the valve caps. ・Check the phase order of the power supply and the interphase voltage. If the voltage is out of the ±10% range, or if

the voltage imbalance is more than 2%, discuss the countermeasure with the customer.

・When a transmission booster unit is connected, turn on the transmission booster unit before turning on the outdoor

unit. If the outdoor unit is turned on first, the refrigerant circuit connection information will not be properly verified. If the outdoor unit is turned on first, turn on the transmission booster unit and then power reset the outdoor unit.

・When a power supply unit is connected to the centralized control transmission cable, or when power is supplied

from a system controller with a power-supply function, perform a test run with the power supply unit being energized. Leave the power jumper connected to CN41.

・When power is turned on or after power recovery, performance may degrade for approximately 30 minutes.

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11-2. Function setting

Make function settings by setting the dipswitches SW4, SW6, and SWP1 on the main board. Write down the switch settings on the electrical wiring diagram label on the control box front panel for future reference when the control box needs to be replaced.

・Take the following steps to make snow sensor settings. (Snow sensor control will not function when the outdoor

temperature sensor (TH7) reading is 6ºC (43ºF) or above.)

① Set the 10th bit of SW6 to ON. ② Set SW4 as shown in the table below to select the setting item No.933 or 934. (The setting item No. will be

displayed on LED1.)

③ Press SWP1 for two seconds or longer to change the settings. (The settings can be checked on LED3.)

Setting item

No.

Snow sensor

setting

*1 Make the SW4 setting after the unit is energized. *2 This will blink while the system is starting up.

933 1 0 1 0 0 1 0 1 1 1 No. 934 ineffective No. 934 effective 934 0 1 1 0 0 1 0 1 1 1 Continuous fan operation Intermittent fan operation

1 2 3 4 5 6 7 8 9 10 Unlit Lit

SW4 0: OFF, 1: ON *

・Make various function settings by setting SW6, referring to the table below.

Setting (LED3 display) *

Setting content

SW6-1 – – – – SW6-2 – – – – SW6-3 – – – – SW6-4 Static pressure setting Standard static pressure High static pressure Before being energized SW6-5 High static pressure setting 60 Pa 30 Pa Before being energized SW6-6 – – – – SW6-7 Low-noise mode selection Performance priority Low-noise priority Any time after being energized SW6-8 Selection of Low-noise or Demand Low-noise (Night) Demand Before being energized SW6-9 – – – –

SW6-10

* Do not change the factory settings of SW5-3 through SW5-8. * Unless otherwise specified, leave the switch to OFF where indicated by "–," which may be set to OFF for a reason.

Selection of Diagnostic display or

Function detail setting

OFF ON

Diagnostic display Function detail setting Any time after being energized

Setting

Switch setting timing

11-3. Operation characteristics in relation to the refrigerant charge

It is important to have a clear understanding of the characteristics of refrigerant and the operation characteristics of air conditioners before attempting to adjust the refrigerant charge in a given system.

・During cooling operation, the amount of refrigerant in the accumulator is the smallest when all indoor units are in

operation.

・During heating operation, the amount of refrigerant in the accumulator is the largest when all indoor units are in

operation.

・Refrigerant undercharge creates a tendency for the discharge temperature to rise. ・Changing the amount of refrigerant in the system while there is refrigerant in the accumulator has little effect on the

discharge temperature.

・The higher the high pressure level, the more likely it is for the discharge temperature to rise. ・The lower the low pressure level, the more likely it is for the discharge temperature to rise. ・When the amount of refrigerant in the system is adequate, the compressor shell temperature is 10 to 60ºC (50 to

140ºF) higher than the low-pressure saturation temperature. If the temperature difference between the compressor shell temperature and low-pressure saturation temperature is 5ºC (41ºF) or less, refrigerant overcharge is suspected.

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11-4. Operation check

The following symptoms are normal and do not indicate a problem.

Events Display on

remote controller

A specific indoor unit is not performing the cooling or heating operation.

The auto vane automatically switches air flow direction.

The fan speed automatically changes during heating operation.

The fan stops during heating operation. "Defrost" The fan remains stopped during the defrost cycle. The fan keeps running after the unit has

stopped. At the beginning of heating operation, the

fan cannot be manually set.

When the main power is turned on, the display as shown right appears on the remote controller for about five minutes.

The drain pump keeps running after the unit has stopped.

The indoor unit emits noise when switching from heating to cooling and vice versa.

Immediately after startup, the indoor unit emits the sound of refrigerant flowing.

Warm air comes from an indoor unit that is not performing the heating operation.

"Cool" or "Heat" blinks.

Normal display The auto vane may switch over to horizontal air flow operation from vertical air flow

Normal display The fan operates at Very Low speed when the thermostat is turned off, and

No display After the unit has stopped during heating operation, the fan operates for one

"Stand By" The fan operates at Very Low speed for five minutes after heating operation starts

"H0" or "PLEASE WAIT" blinks.

No display The drain pump remains in operation for three minutes after the unit in cooling

Normal display This is a normal sound of the refrigerant circuit operating properly.

Normal display Unstable flow of the refrigerant produces a sound. This is temporary and does not

Normal display The LEV is slightly open for preventing any refrigerant, inside of the indoor unit that

Cause

Other indoor units in the same refrigerant system are already operated in a different mode.

operation in cooling mode if the vertical air flow operation has been running for one hour. At defrost in heating mode or immediately after heating start-up/shutdown, the auto vane automatically switches to horizontal air flow for a short time.

automatically changes over to the preset speed according to the timer setting or refrigerant temperature when the thermostat is turned on.

minute to exhaust heat.

or until the refrigerant temperature reaches 35°C (95°F), then the fan operates at Low speed for two minutes, and finally the fan operates at the preset speed.

The system is starting up. Wait until "HO" or "PLEASE WAIT" stops blinking and goes off then try again.

mode has stopped. The drain pump goes into operation when drain water is detected, even when the unit is stopped.

imply a problem.

is not performing the heating operation, from being liquefied. This does not imply a problem.

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12. Inspection and maintenance

Only qualified personnel must relocate or repair the unit. Do not attempt to disassemble or alter the unit.

- Failure to do so will result in refrigerant leakage, water leakage, serious injury, electric shock, or fire.

・While the unit is turned on, the compressor will remain energized even when it is stopped. Before inspecting the

inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the capacitor voltage (inverter main circuit) has dropped to 20 VDC or less. (It takes about 10 minutes to discharge electricity after the power supply is turned off.)

・Control boxes house high-voltage and high-temperature electrical parts. They may still remain energized or hot

after the power is turned off.

・Perform the service after disconnecting the fan board connector (CNINV) and the inverter board connector (CN1).

(To plug or unplug connectors, check that the outdoor unit fan is not rotating and that the voltage of capacitor in the main circuit is 20 VDC or below. The capacitor may collect a charge and cause an electric shock when the outdoor unit fan rotates in windy conditions. Refer to the wiring nameplate for details.) Reconnect the connector (CNINV) back to the fan board and reconnect the connector (CN1) back to the inverter board after servicing.

・Unit components may be damaged after long use of the unit, resulting in a performance drop or the unit becoming a

safety hazard. To use the unit safely and maximize its life, it is recommended that a maintenance contract with a dealer or qualified personnel be signed. If the contract is signed, service technicians will periodically inspect the unit to identify any damage at an early stage, and take appropriate measures.

・Please contact local MITSUBISHI ELECTRIC sales office for maintenance frequency and tasking

recommendations.

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13. Rating plate information

Model Unit combination – – – – – Refrigerant

(R410A) Allowable pressure

(Ps) Net weight 208 kg 208 kg 252 kg 252 kg 318 kg

Model Unit combination – – Refrigerant

(R410A) Allowable pressure

(Ps) Net weight 318 kg 332 kg

Model Unit combination Refrigerant

(R410A) Allowable pressure

(Ps) Net weight 208 kg 208 kg 252 kg 208 kg

Model Unit combination Refrigerant

(R410A) Allowable pressure

(Ps) Net weight 252 kg 252 kg 208 kg 208 kg 208 kg

PUHY-EP200YLM-A(-BS) PUHY-EP250YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP400YLM-A(-BS)

7.5 kg 7.5 kg 10.3 kg 10.3 kg 11.8 kg

HP: 4.15 MPa, LP: 2.21 MPa

PUHY-EP450YLM-A(-BS) PUHY-EP500YLM-A(-BS)

11.8 kg 11.8 kg

HP: 4.15 MPa, LP: 2.21 MPa

PUHY-EP500YSLM-A(-BS) PUHY-EP550YSLM-A(-BS)

PUHY-EP250YLM-A(-BS) PUHY-EP250YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP250YLM-A(-BS)

7.5 kg 7.5 kg 10.3 kg 7.5 kg

HP: 4.15 MPa, LP: 2.21 MPa

PUHY-EP600YSLM-A(-BS) PUHY-EP650YSLM-A(-BS)

PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP250YLM-A(-BS) PUHY-EP200YLM-A(-BS) PUHY-EP200YLM-A(-BS)

10.3 kg 10.3 kg 7.5 kg 7.5 kg 7.5 kg

HP: 4.15 MPa, LP: 2.21 MPa

Model Unit combination Refrigerant

(R410A) Allowable pressure

(Ps) Net weight

Model Unit combination Refrigerant

(R410A) Allowable pressure

(Ps) Net weight 252 kg 252 kg 208 kg 252 kg 252 kg 208 kg

Model Unit combination Refrigerant

(R410A) Allowable pressure

(Ps) Net weight 252 kg 252 kg 252 kg 252 kg 252 kg 252 kg

Model Unit combination Refrigerant

(R410A) Allowable pressure

(Ps) Net weight 318 kg 252 kg 252 kg 318 kg 252 kg 252 kg

PUHY-EP300YLM-A(-BS) PUHY-EP200YLM-A(-BS) PUHY-EP200YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP250YLM-A(-BS) PUHY-EP200YLM-A(-BS)

10.3 kg 7.5 kg 7.5 kg 10.3 kg 7.5 kg 7.5 kg

252 kg 208 kg 208 kg 252 kg 208 kg 208 kg

PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP200YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP250YLM-A(-BS)

10.3 kg 10.3 kg 7.5 kg 10.3 kg 10.3 kg 7.5 kg

PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS)

10.3 kg 10.3 kg 10.3 kg 10.3 kg 10.3 kg 10.3 kg

PUHY-EP400YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP300YLM-A(-BS) PUHY-EP400YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP300YLM-A(-BS)

11.8 kg 10.3 kg 10.3 kg 11.8 kg 10.3 kg 10.3 kg

PUHY-EP700YSLM-A(-BS) PUHY-EP750YSLM-A(-BS)

HP: 4.15 MPa, LP: 2.21 MPa

PUHY-EP800YSLM-A(-BS) PUHY-EP850YSLM-A(-BS)

HP: 4.15 MPa, LP: 2.21 MPa

PUHY-EP900YSLM-A(-BS) PUHY-EP950YSLM-A(-BS)

HP: 4.15 MPa, LP: 2.21 MPa

PUHY-EP1000YSLM-A(-BS) PUHY-EP1050YSLM-A(-BS)

HP: 4.15 MPa, LP: 2.21 MPa

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Model Unit combination Refrigerant

(R410A) Allowable pressure

(Ps) Net weight 318 kg 252 kg 252 kg 318 kg 252 kg 252 kg

PUHY-EP400YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP350YLM-A(-BS)

11.8 kg 10.3 kg 10.3 kg 11.8 kg 10.3 kg 10.3 kg

PUHY-EP1100YSLM-A(-BS) PUHY-EP1150YSLM-A(-BS)

HP: 4.15 MPa, LP: 2.21 MPa

Model Unit combination Refrigerant

(R410A) Allowable pressure

(Ps) Net weight 318 kg 318 kg 252 kg 318 kg 318 kg 252 kg

Model Unit combination Refrigerant

(R410A) Allowable pressure

(Ps) Net weight 318 kg 318 kg 318 kg 318 kg 318 kg 318 kg

PUHY-EP450YLM-A(-BS) PUHY-EP400YLM-A(-BS) PUHY-EP350YLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP350YLM-A(-BS)

11.8 kg 11.8 kg 10.3 kg 11.8 kg 11.8 kg 10.3 kg

PUHY-EP450YLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP400YLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP450YLM-A(-BS) PUHY-EP450YLM-A(-BS)

11.8 kg 11.8 kg 11.8 kg 11.8 kg 11.8 kg 11.8 kg

PUHY-EP1200YSLM-A(-BS) PUHY-EP1250YSLM-A(-BS)

HP: 4.15 MPa, LP: 2.21 MPa

PUHY-EP1300YSLM-A(-BS) PUHY-EP1350YSLM-A(-BS)

HP: 4.15 MPa, LP: 2.21 MPa

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This product is designed and intended for use in the residential,

commercial and light-industrial environment.

The product at hand is based on the following EU regulations:

•Low Voltage Directive 2006/95/EC

•Electromagnetic Compatibility Directive 2004/108/EC

•Pressure Equipment Directive 97/23/EC

•Machinery Directive 2006/42/EC

Please be sure to put the contact address/telephone number

on this manual before handing it to the customer.

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Authorized representative in EU: MITSUBISHI ELECTRIC EUROPE B.V.

HARMAN HOUSE, 1 GEORGE STREET, UXBRIDGE, MIDDLESEX UB8 1QQ, U.K.

WT07281X03

Mitsubishi Electric PUHY-EP200YLM-A, PUHY-EP250YLM-A, PUHY-EP300YLM-A, PUHY-EP350YLM-A, PUHY-EP400YLM-A INSTALLATION MANUAL

Specifications and Main Features

Frequently Asked Questions

User Manual