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MITSUBISHI ELECTRIC MULTI AIR CONDITIONERS OPTIONAL PARTS

CMY-Y100CBK2, Y200CBK2, Y300CBK2Outdoor Twinning Kit Installation Manual

• For your safety, thoroughly read the following instructions prior to installation.

Safety Precautions• Thoroughly read the following “Safety Precautions” to ensure proper installation.• Observe the following important safety precautions at all times.• Hazards that can occur from incorrect handling are classified by the symbols below:

CAUTION

WARNING

Incorrect handling can result in death or serious injury.

Incorrect handling can result in bodily injury and/or structure damage.

WARNING

CAUTION

Do not touch the refrigerant pipes and refrigerantcircuit components with bare hands during andimmediately after operation.• During or immediately after operation, certain parts of the unitsuch as pipes and compressor may be either very cold or hot,depending on the state of the refrigerant in the unit at the time.To reduce the risk of frostbites and burns, do not touch theseparts with bare hands.

Properly install all parts according to the instructionsin the Installation Manual.• If the wrong twinning pipe or wrong size connecting pipe isused, air conditioning performance will suffer.

When installing or relocating the unit, check that nosubstance other than the specified refrigerant(R410A) enters the refrigerant circuit.• Any presence of foreign substance or air can cause abnormalpressure rise or explosion.

After installation, check for a refrigerant leak.

• If leaked refrigerant comes in contact with a heat source, suchas a fan heater, stove, or electric grill, toxic gases will begenerated.

1. Confirming the Package ContentsThe following twinning and accessory piping parts are included with the Twinning Kit(CMY-Y100CBK2, CMY-Y200CBK2, and CMY-Y300CBK2). Verify that all items arepresent before starting installation.After checking, prepare the twinning kit by connecting the twinning pipes B, C, and Dto the twinning pipe A.*Always use the twinning pipes included in the kit when preparing the twinning kit.If the field-supplied pipes do not fit the parts in the kit, use the accessory piping partslisted below.

* See the Installation Manual that came with the outdoor unit for installation instructions.

Twinning aInsulation cover

Twinning kit

Pipe b (Before the twinning) Pipe c (After the twinning)

L-shape pipe d (After the twinning)

Twinning kit

L-shape pipe D (After the twinning)

Insulation coverTwinning A

Pipe B (Before the twinning)Pipe C (After the twinning)

Only a dealer or qualified technician should performinstallation.• Improper installation may result in refrigerant gas leakage andequipment damage.

Do not make any modifications or alterations.Consult your dealer for repair.• Improper installation may result in water leakage, electric shock,or fire.

In the event of a refrigerant leak, thoroughly ventilatethe room.• If refrigerant leaks and comes in contact with an open flame,toxic gases will be generated.

Properly dispose of packing materials.

• Plastic bags can pose suffocation and choking hazards: keepthem out of the reach of children. Tear the plastics bags beforedisposing of them.

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(1) Twinning pipes

(2) Accessory piping parts

(3) List of field-supplied parts• Refrigerant pipes other than the ones provided in the kit.• Heat-resistant insulation material (for field-supplied refrigerant pipes)• Insulation cover tape

2. Selecting the Correct Size Refrigerant Pipesand Using the Twinning Kit(1) Two outdoor units

1 Field-supply the pipes to be connected to the kit.2 Choose the correct size pipe using the table below. Connect

the field-supplied pipe to the twinning kit for the sizes in thetable that are marked with an asterisk (*).

3 If the pipe was cut with a pipe cutter, remove the burrs andeliminate foreign materials before connecting.

A0 B0 C0P168 P96 P72P192 P120 P72P216 P120 P96

PUHY-** P240 P120 P120P264 P144 P120P288 P144 P144

E0

ø15.88

[5/8]

ø19.05[3/4]

F0

ø28.58

[1-1/8]

ø34.93[1-3/8]

D0

CMY-Y100CBK2

CMY-Y200CBK2

1 Two outdoor unitsPackage unit name A0

Component unit name Outdoor unit 1 B0Outdoor unit 2 C0

OutIdoor Twinning Kit D0

Indoor unit~Twinning pipe Liquid A E0Gas B F0

2 Two outdoor units

Unit modelLiquid GasC or E D or F

A1 A2 A3

Twinning pipe~Outdoor unit B1 B2 B3C1 C2 C3D1 D2 D3

(Unit: mm[in])

PUHY-**

(Unit: mm[in])

(2) Three outdoor units1 Field-supply the pipes to be connected to the

kit.2 Choose the correct size pipe using the table

below. Connect the field-supplied pipe to thetwinning kit for the sizes in the table that aremarked with an asterisk (*).

3 If the pipe was cut with a pipe cutter, removethe burrs and eliminate foreign materialsbefore connecting.

Outdoor unit 1 Outdoor unit 2

To Indoor unit

To Indoor unit

Liquid twinning pipe

Gas twinning pipe

A

B

C

D

E

F

Pipe B (Before the twinning)OD15.88[5/8]-ID15.88[5/8]

L83[3-9/32]OD28.58[1-1/8]-ID28.58[1-1/8]

L342[13-15/32]OD19.05[3/4]-ID19.05[3/4]

L85[3-3/8]OD31.75[1-1/4]-ID34.93[1-3/8]

L337[13-9/32]OD15.88[5/8]-ID19.05[3/4]

L85[3-3/8]OD19.05[3/4]-ID19.05[3/4]

L85[3-3/8]OD28.58[1-1/8]-ID34.93[1-3/8]

L337[13-9/32]OD31.75[1-1/4]-ID38.1[1-1/2]

L339[13-3/8]

Twinning A

ID15.88[5/8]×ID12.7[1/2]×ID12.7[1/2]

ID28.58[1-1/8]×ID25.4[1]×ID25.4[1]

ID19.05[3/4]×ID15.88[5/8]×ID15.88[5/8]

ID31.75[1-1/4]×ID28.58[1-1/8]×ID28.58[1-1/8]

ID15.88[5/8]×ID12.7[1/2]×ID12.7[1/2]

ID19.05[3/4]×ID15.88[5/8]×ID15.88[5/8]

ID28.58[1-1/8]×ID25.4[1]×ID25.4[1]

ID31.75[1-1/4]×ID28.58[1-1/8]×ID28.58[1-1/8]

Pipe C (After the twinning)OD12.7[1/2]-ID12.7[1/2]

L128[5-1/16]OD25.4[1]-ID22.2[7/8]

L190[7-1/2]OD15.88[5/8]-ID15.88[5/8]

L123[4-27/32]OD28.58[1-1/8]-ID28.58[1-1/8]

L192[7-9/16]OD12.7[1/2]-ID12.7[1/2]

L128[5-1/16]OD15.88[5/8]-ID19.05[3/4]

L125[4-15/16]OD25.4[1]-ID28.58[1-1/8]

L192[7-9/16]OD28.58[1-1/8]-ID34.93[1-3/8]

L187[7-3/8]

Model

CMY-Y100CBK2

CMY-Y200CBK2

CMY-Y300CBK2

Section

Liquid

Gas

Liquid

Gas

LiquidSecond row

LiquidFirst row

GasSecond row

GasFirst row

Label

A

D

C

B

A (Red)

C (Red)

D (Red)

B (Red)

L-shape pipe D (After the twinning)

OD12.7[1/2]-ID12.7[1/2]

OD25.4[1]-ID22.2[7/8]

OD15.88[5/8]-ID15.88[5/8]

OD28.58[1-1/8]-ID28.58[1-1/8]

OD12.7[1/2]-ID12.7[1/2]

OD15.88[5/8]-ID15.88[5/8]

OD25.4[1]-ID28.58[1-1/8]

OD28.58[1-1/8]-ID28.58[1-1/8]

Insulation cover

Small

Large

Small

Large

Small

Small

Large

Large

Instruction

1(This sheet)

(Unit: mm[in])

Model

CMY-Y100CBK2

CMY-Y200CBK2

CMY-Y300CBK2

Section

Liquid

Gas

Liquid

Gas

Liquid

Gas

OD12.7[1/2]-ID9.52[3/8] (2)

OD22.2[7/8]-ID28.58[1-1/8]

OD15.88[5/8]-ID12.7[1/2] (2)

OD34.93[1-3/8]-ID41.28[1-5/8]

OD12.7[1/2]-ID9.52[3/8]

OD28.58[1-1/8]-ID22.2[7/8] (3)

OD15.88[5/8]-ID12.7[1/2]

OD22.2[7/8]-ID19.05[3/4] (2)

OD12.7[1/2]-ID15.88[5/8] (2)

OD38.1[1-1/2]-ID41.28[1-5/8]

OD15.88[5/8]-ID9.52[3/8]

OD28.58[1-1/8]-ID19.05[3/4] (2)

OD15.88[5/8]-ID12.7[1/2]

OD38.1[1-1/2]-ID34.93[1-3/8]

Supplied pipe

(Unit: mm[in])

Liquid twinning pipe 2

Outdoor unit 3Outdoor unit 1 Outdoor unit 2

To Indoor unit

To Indoor unit

Liquid twinning pipe 1

Gas twinning pipe 1

A

B

C

D

E

F

G

H

Gas twinning pipe 2

I

J

A1A2A3

P72ø9.52[3/8](*)ø19.05[3/4](*)

B1B2B3P96

ø9.52[3/8](*)ø22.2[7/8]

C1C2C3

P120ø9.52[3/8](*)ø22.2[7/8]

D1D2D3

P144ø12.7[1/2]

ø28.58[1-1/8]

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±15°

The angle of tilt of the reducer should be within

±15° with the ground.

3 Three outdoor unitsPackage unit name A0

Outdoor unit1 B0Component unit name Outdoor unit2 C0

Outdoor unit3 D0Outdoor Twinning Kit E0

Indoor unit~Twinning pipe2Liquid A F0Gas B G0

Twinning pipe1~Twinning pipe2Liquid C H0Gas D I0

4 Three outdoor units

Unit modelLiquid Gas

E or G or I F or H or JA1 A2 A3

Twinning pipe~Outdoor unitB1 B2 B3C1 C2 C3D1 D2 D3

(Unit: mm[in])(Unit: mm[in])

A0 B0 C0 D0 E0 F0 G0 H0 I0

P312 P120 P120 P72PUHY-** CMY-Y300CBK2

P336 P120 P120 P96P360 P144 P120 P96

ø19.05[3/4]

ø34.93[1-3/8](*)

ø41.28[1-5/8](*)

ø19.05[3/4]

ø34.93[1-3/8] PUHY-**

(5) Pipe connectionWhen connecting the twinning kit to the outdoor unit, note the following:

· Make sure the pipes from the twinning pipe to the outdoor unit are sloped downwards (towards the twinning pipes).· If the piping on the outdoor unit side (from the twinning pipe) exceeds 2 m [6 ft], ensure a trap (gas pipe only) within 2 m

[6 ft].Make sure the height of the trap is 200 mm [7-7/8 in] or more.If there is no trap, oil can accumulate inside the pipe, causing a shortage of oil and may damage the compressor.

Within2 m [6 ft]

(3) Slope of twinning pipesMake sure the slope of the twinning pipes are at an angle within ±15° tothe horizontal plane.If the slope exceeds the specified angle, the unit may be damaged.

(4) The length of the straight pipe between indoor units and the twin-ning pipe

Use the pipes supplied in the twinning kit, and make sure the section ofthe field-supplied pipe that connects to the twinning pipe has at least500 mm [19-11/16 in] of straight section. (The section of the field-supplied pipe that connects to the twinning pipe must have at least 500mm [19-11/16 in] of straight section.) If the straight section is less than500 mm [19-11/16 in], it may result in equipment damage.

<2 m [6 ft] or less>

· If the twinning pipe is installed above the base of theoutdoor unit, it should be no more than 200 mm [7-7/8 in].

Note: Refer to the figure below for the installationposition of the twinning pipe.

Slope of the twinning pipes are at an angle within±15° to the horizontal plane

Twinning pipe

±15

°

Outdoor unit 2 Outdoor unit 3Outdoor unit 1

<More than 2 m [6 ft] apart>

To Indoorunit200 mm [7-7/8 in]

max

Twinning 1 Twinning 2

To Indoor unit

200 mm[7-7/8 in]or more

Twinning pipe2 m [6 ft] Twinning pipe

To Indoor unit

Upward slopeTwinning pipe

Downward slopeTo Indoor unit

100 mm[3-15/16in] ormore

To Indoor unit

Total pipe length = A+B<10 m [32 ft]

AB

A1A2A3P72

ø9.52[3/8](*)ø19.05[3/4](*)

B1B2B3

P96ø9.52[3/8](*)ø22.2[7/8](*)

C1C2C3

P120ø9.52[3/8](*)ø22.2[7/8](*)

D1D2D3

P144ø12.7[1/2]

ø28.58[1-1/8]

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3. Pipe Connection ExampleConnect the pipes between outdoor units, referencing the figures below.

<For two outdoor units>

<For three outdoor units>

4. Insulation Cover InstallationInstall the insulation cover on the twinning kit after brazing the pipes and twinning kit.Insulate all refrigerant pipes. Insulate the liquid and gas pipes separately, and pipes located inside the unit as well as the outside.Use heat-resistant insulation material (Heat resistant: at least 120 °C [248 °F], Thickness: liquid = 10 mm [13/32 in],gas = 20 mm [13/16 in]). Position the edges of the insulation cover and heat-resistant insulation material so as not to leave a gap,and then wrap the exterior perimeter of the pipe joints and middle with tape (field-supplied).

Field-supplied pipe

Twinning kit

Straight pipe that is 500 mm[19-11/16 in] or more

Field-supplied pipe

Twinning kitField-supplied pipe

Straight pipe that is 500 mm[19-11/16 in] or more

Field-supplied pipe

Twinning kit

Straight pipe that is 500 mm[19-11/16 in] or more

Field-supplied pipe

Field piping

Field piping

Insulation material (field supply)

Insulation material (field supply)

Field piping

Twinning kitInsulation cover

Tape (field supply)

Tape (field supply)Tape (field supply)

Lapped space of taping

Insulation coverInsulation material(field supply)

As the insulation cover contracts slightly, conduct taping in the field securely by providing lapped parts as shown in the left, so that no gap will exist on the insulation cover and field supply insulation material.

Tape (field-supplied)

Insulation cover Heat-resistant insulationmaterial (field-supplied)

Overlap margin of the tape

Insulation covers can shrink.Overlap the tape as shown inthe left figure so that therewill be no gap in between theinsulation cover or field-installed insulation material.

Twinning kit

Field-supplied pipe

Heat-resistant insulation material (field-supplied)

Field-supplied pipe

Insulation cover

Field-supplied pipe Heat-resistantinsulation material(field-supplied)

Tape (field-supplied)

Tape (field-supplied)

5. Miscellaneous NotesSecure the field-supplied pipes with a pipe cover and a cable tie in place to keep them from coming in contact with other pipes asnecessary.

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