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1
2
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WARNING
MITSUBISHI ELECTRIC MULTI AIR CONDITIONERS OPTIONAL PARTS
Outdoor Twinning Kit Installation Manual
CMY-Y100VBK2, Y200VBK2, Y300VBK2
• For safe and correct use, please read this installation manual thoroughly before installation.
For your safety, follow the instructions with
WARNING and
CAUTION symbols.
Safety Precautions
• Before installing the unit, make sure you read all the “Safety precautions”.
• These precautions provide very important points regarding safety. Make sure you follow them.
• The following symbols are intended to alert the presence of danger in case of miss-operation.
Ask the dealer or an authorized technician to install
the unit.
• Improper installation may result in problems such as gas
leakage.
Do not modify the unit in any way. Ask your dealer to
repair the air conditioner.
• Improper installation by the user may result in water leakage,
electric shock, or fire.
If refrigerant gas leaks during installation work,
ventilate the room.
• If the refrigerant gas comes into contact with a flame, poisonous
gases will be released.
Install the unit according to this Installation Manual.
• Select appropriate twinning types and sizes of connecting pipes.
If inappropriate types or sizes are connected, the air condition-
ing system cannot deliver the expected performance.
When installing or moving the unit, make sure that
the specified refrigerant (R410A only) is charged into
the refrigerant circuit.
• Any presence of foreign substance or even air can cause
abnormal pressure rise or explosion.
After the installation is completed, make sure that the
refrigerant gas is not leaking.
• If the refrigerant gas leaks into the room, and it is exposed to a
fan heater, space heater, kitchen range, or some other heat
source, it may generate a noxious gas.
Safely dispose of the packing materials.
• Tear up and throw away any plastic packaging bags so that
children will not play with them. If children play with a plastic
bag which has not been torn apart, they run the risk of
suffocation.
Do not touch the refrigerant pipes during and
immediately after operation.
• During and immediately after the operation, the parts of the
refrigerant circuit including the refrigerant piping or the
compressor may be hot or cold, depending on the condition of
the flowing refrigerant. To prevent the risk of frostbite or burns,
do not touch these parts with bare hands.
1. Confirming the Supplied Parts
The twinning kit box (CMY-Y100VBK2, CMY-Y200VBK2, and CMY-Y300VBK2) contains the
following twinning and accessory piping parts. Make sure that the kit contains all of these
parts.
After checking, prepare the twinning kit by connecting the twinning pipes b, c, and d to the
twinning pipe a.
*Always use the twinning pipes included in the kit when preparing the twinning kit.
Depending on the model type, the size of the field piping may be different from the pipe size
of the twinning kit. In such a case, connect the following accessory piping parts to the kit.
(1) Twinning pipes
* For general instructions on the installation of an outdoor unit, follow the Installation Manual for the outdoor unit.
CAUTION
Twinning a
Insulation 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 cover
Twinning a
Pipe b (Before the twinning)
Pipe c (After the twinning)
Model
CMY-Y100VBK2
CMY-Y200VBK2
CMY-Y300VBK2
Section
Liquid
Gas
Liquid
Gas
Liquid
Second row
Liquid
First row
Gas
Second row
Gas
First row
Lebel
A
D
C
B
A (Red)
C (Red)
D (Red)
B (Red)
Twinning a
15.88
×
12.7
×
12.7
28.58
×
25.4
×
25.4
19.05
×
15.88
×
15.88
31.75
×
28.58
×
28.58
15.88
×
12.7
×
12.7
19.05
×
15.88
×
15.88
28.58
×
25.4
×
25.4
31.75
×
28.58
×
28.58
Pipe b (Before the twinning)
OD15.88-ID15.88
L83
OD28.58-ID28.58
L342
OD19.05-ID19.05
L85
OD31.75-ID34.93
L337
OD15.88-ID19.05
L85
OD19.05-ID19.05
L85
OD28.58-ID34.93
L337
OD31.75-ID38.1
L339
Pipe c (After the twinning)
OD12.7-ID12.7
L128
OD25.4-ID22.2
L190
OD15.88-ID15.88
L123
OD28.58-ID28.58
L192
OD12.7-ID12.7
L128
OD15.88-ID19.05
L125
OD25.4-ID28.58
L192
OD28.58-ID34.93
L187
L-shape pipe d (After the twinning)
OD12.7-ID12.7
OD25.4-ID22.2
OD15.88-ID15.88
OD28.58-ID28.58
OD12.7-ID12.7
OD15.88-ID15.88
OD25.4-ID28.58
OD28.58-ID28.58
Insulation cover
Small
Large
Small
Large
Small
Small
Large
Large
Instruction
1
(This sheet)
(2) Accessory piping parts
(3) Field supplied parts
• Field supplied parts that do not come with the twinning kit
• Heat-resistant insulation material (for field piping)
• Insulation cover fixing tape
2. Selecting the Size of the Refrigerant Pipe and How to Use the Twinning Kit
(1) PUHY-P500 – P900, EP400 – EP650
(Outdoor unit
×
2)
1
Prepare the pipe to be connected in the field.
2
Select the pipe size for each part from the table below. A (*)
mark after a pipe size indicates that the specified pipe size in
the following table can be obtained by connecting the acces-
sory piping to the twinning kit.
3
Cut the pipe with a pipe cutter and remove the burr. Connect
the pipe after removing any dust or foreign matter.
PUHY-P500 – P900
(2) PUHY-P950 – P1250, EP700 – EP900
(Outdoor unit
×
3)
1
Prepare the pipe to be connected in the field.
2
Select the pipe size for each part from the
table below. A (*) mark after a pipe size
indicates that the specified pipe size in the
following table can be obtained by connecting
the accessory piping to the twinning kit.
3
Cut the pipe with a pipe cutter and remove the
burr. Connect the pipe after removing any dust
or foreign matter.
PUHY-EP400 – EP650
Outdoor unit 2
Outdoor unit 1
Outdoor unit 3
To Indoor unit
To Indoor unit
b
a
d
c
j
i
g
h
e
f
Liquid 1 twinning pipe
Liquid 2 twinning pipe
Gas 1 twinning pipe
Gas 2 twinning pipe
Outdoor unit 3
Outdoor unit 1
Outdoor unit 2
To Indoor unit
To Indoor unit
Liquid 1 twinning
pipe
Gas 1 twinning pipe
a
b
c
d
e
f
g
h
Liquid 2 twinning pipe
Gas 2 twinning pipe
i
j
(5) The piping connection
When connecting the twinning kit to the outdoor unit, note the following:
· If the length of piping from the twinning kit to the outdoor unit is more than 2 m (6 ft), install a trap within 2 m (6 ft) from
the outdoor unit.
The height of the trap must be 200 mm (7 inch) or higher.
PUHY-P950 – P1250
(3) The angle of tilt of the twinning pipe
The angle of tilt of the twinning pipe should be within
±
15
°
with the
ground.
Tilting the twinning pipe more than specified will cause damage to the
unit.
(4) The length of the straight part of the pipe before the twinning
For the twinning kit, always use the accessory piping parts. The length
of the straight part of pipe connected in front of the twinning pipe must
be 500 mm (19 inch) or longer. (Connect the field piping so that the
length of the straight part of pipe connected in front of the twinning pipe
can be 500 mm (19 inch) or longer.)
If the length is less than 500 mm (19 inch), it will cause damage to the
unit.
<2 m (6 ft) or less>
<More than 2 m (6 ft)>
· When installing the twinning kit in a higher
position than the outdoor unit base, make sure
that the twinning kit is installed in a position
lower than 200 mm (7 inch) from the outdoor
unit base.
To Indoor unit
2 m (6 ft)
2 m (6 ft)
To Indoor unit
PUHY-EP700 – EP900
Less than
2 m (6 ft)
To Indoor unit
200 mm (7 inch)
or over
Less than
2 m (6 ft)
To Indoor unit
200 mm (7 inch)
or over
Reducer
±
15
°
The angle of tilt of the reducer should be within
±
15
°
with the ground.
Note: See the following drawing for the fitting position
of the twinning pipe.
Note: See the following drawing for the fitting position
of the twinning pipe.
The angle of tilt of the reducer should be within
±
15
°
with the ground.
Reducer
±
15
°
3. Example of a Pipe Connection
See the following drawing for connecting the pipes between the outdoor units.
<For 2 outdoor units>
<For 3 outdoor units>
4. Installing the Insulation Cover
After brazing the pipes and the twinning kit, insulate the twinning kit with the insulation cover.
Add insulation materials on all the refrigerant piping, including the field piping. Make sure to insulate the pipes for liquid and gas
separately. When using commercially available insulation material, make sure to use heat-resistant insulation material with heat-
resistant temperature of 120
°
C or higher.
Align the edges of the insulation cover and the heat-resistant insulation material so that there will be no gap. Seal also the periphery
and centre of the twinning part with a tape (field supply).
Tape (field supply)
Lapped space of taping
Insulation cover
Insulation 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 supply)
Insulation cover
Insulation material
(field supply)
Lapped space of taping
The insulation cover
shrinks slightly, so wrap the
insulation cover and the
field-installed insulation
material securely with tape
by overlapping the tape as
shown left.
Field piping
Field piping
Insulation material (field supply)
Insulation material
(field supply)
Field piping
Twinning kit
Insulation cover
Tape (field supply)
Tape (field supply)
Twinning kit
Field piping
Insulation material (field supply)
Field piping
Insulation cover
Field piping
Insulation material
(field supply)
Tape (field supply)
Tape (field supply)
Field piping
Field piping
Twinning kit
The length of the straight pipe must
be 500 mm (19 inch) or longer.
Field piping
Twinning kit
The length of the straight pipe must be
500 mm (19 inch) or longer.
Field piping
Field piping
Field piping
Twinning kit
Field piping
Twinning kit
The length of the straight pipe must
be 500 mm (19 inch) or longer.
The length of the straight pipe must
be 500 mm (19 inch) or longer.
Field piping
Twinning kit
The length of the straight pipe must
be 500 mm (19 inch) or longer.
Field piping
Twinning kit
Field piping
The length of the straight pipe must
be 500 mm (19 inch) or longer.
Outoor unit 2
Outoor unit 1
Outoor unit 3
Twinning 1
Less than
200 mm
(7 inch)
Twinning 2
To Indoor unit
To Indoor
unit
Less than
200 mm (7 inch)
Twinning 1
Twinning 2
Outdoor unit 1
Outdoor unit 2
Outdoor unit 3
WT05134X01
Model
CMY-Y100VBK2
CMY-Y200VBK2
CMY-Y300VBK2
Section
Liquid
Gas
Liquid
Gas
Liquid
Gas
OD12.7-ID9.52 (2)
OD22.2-ID28.58
OD15.88-ID12.7 (2)
OD34.93-ID41.28
OD12.7-ID9.52
OD28.58-ID22.2 (3)
OD15.88-ID12.7
OD22.2-ID19.05 (2)
OD12.7-ID15.88 (2)
OD38.1-ID41.28 (1)
OD15.88-ID9.52
OD28.58-ID19.05 (2)
OD15.88-ID12.7
OD38.1-ID34.93
Supplied pipe
Outdoor unit 2
Outdoor unit 1
To Indoor unit
f
e
d
c
b
a
Liquid twinning pipe
Gas twinning pipe
To Indoor unit
Outdoor unit 1
Outdoor unit 2
To Indoor unit
To Indoor unit
Liquid twinning pipe
Gas twinning pipe
a
b
c
d
e
f
This symbol indicates that failure to follow the instructions exactly as stated poses the risk of serious injury or death.
This symbol indicates that failure to follow the instructions exactly as stated poses the risk of injury or damage to the
unit and other property.
WARNING
CAUTION
Set Unit
Liquid
Gas
a
b
Indoor – Twinning
Twinning Type
Set model
Unit 1
Unit 2
PUHY-P500
PUHY-P250
PUHY-P250
PUHY-P550
PUHY-P300
PUHY-P250
PUHY-P600
PUHY-P350
PUHY-P250
PUHY-P650
PUHY-P350
PUHY-P300
PUHY-P700
PUHY-P350
PUHY-P350
PUHY-P750
PUHY-P400
PUHY-P350
PUHY-P800
PUHY-P450
PUHY-P350
PUHY-P850
PUHY-P450
PUHY-P400
PUHY-P900
PUHY-P450
PUHY-P450
CMY-Y100VBK2
ø15.88
ø28.58
CMY-Y200VBK2
ø19.05
ø41.28 (*)
ø34.93
Set Unit
Liquid
Gas
a
b
Indoor unit -
Twinning pipe
Outdoor Twinning Kit (optional parts)
Set model
Outdoor unit 1
Outdoor unit 2
PUHY-EP400
PUHY-EP200
PUHY-EP200
PUHY-EP450
PUHY-P250
PUHY-EP200
PUHY-EP500
PUHY-EP300
PUHY-EP200
PUHY-EP550
PUHY-EP300
PUHY-P250
PUHY-EP650
PUHY-P350
PUHY-EP300
CMY-Y100VBK2
PUHY-EP600
PUHY-EP300
PUHY-EP300
ø15.88
ø28.58
Set Unit
Liquid
Gas
Liquid
Gas
a
b
c
d
Indoor – Twinning 2
Twinning 1 – Twinning 2
Twinning Type
Set model
Unit 1
Unit 2
Unit 3
CMY-Y300VBK2
ø19.05
ø41.28 (*)
ø19.05
ø34.93
PUHY-P950
PUHY-P400
PUHY-P300
PUHY-P250
PUHY-P1000
PUHY-P400
PUHY-P300
PUHY-P300
PUHY-P1050
PUHY-P400
PUHY-P350
PUHY-P300
PUHY-P1100
PUHY-P400
PUHY-P350
PUHY-P350
PUHY-P1150
PUHY-P450
PUHY-P350
PUHY-P350
PUHY-P1200
PUHY-P450
PUHY-P400
PUHY-P350
PUHY-P1250
PUHY-P450
PUHY-P450
PUHY-P350
Unit model
P250
P300
P350
P400
P450
EP200
EP300
Liquid
c or e
ø9.52 (*)
ø12.7
ø12.7 (*)
ø15.88
ø15.88
ø9.52
ø12.7
Gas
d or f
ø22.2
ø22.2
ø28.58
ø28.58
ø28.58
ø19.05
ø22.2
Twinning pipe - Outdoor unit
Set Unit
Outdoor Twinning Kit (optional parts)
Set model
Unit 1
Unit 2
Unit 3
ø19.05
ø34.93
Liquid
Gas
Liquid
Gas
a
b
c
d
CMY-Y300VBK2
PUHY-EP700
PUHY-EP300
PUHY-EP200
PUHY-EP200
PUHY-EP750
PUHY-EP300
PUHY-P250
PUHY-EP200
PUHY-EP800
PUHY-EP300
PUHY-EP300
PUHY-EP200
PUHY-EP850
PUHY-EP300
PUHY-EP300
PUHY-P250
PUHY-EP900
PUHY-EP300
PUHY-EP300
PUHY-EP300
ø41.28
ø34.93
ø19.05
Indoor unit -
Twinning pipe 2
Twinning pipe 1 –
Twinning pipe 2
Unit model
P250
P300
P350
P400
P450
EP200
EP300
Liquid
e or g or i
ø9.52 (*)
ø12.7
ø12.7 (*)
ø15.88
ø15.88
ø9.52
ø12.7
Gas
f or h or j
ø22.2
ø22.2
ø28.58
ø28.58
ø28.58
ø19.05
ø22.2
Twinning pipe - Outdoor unit
WT05134X01̲A2̲P65
07.4.25, 9:17 AM
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