Mitsubishi Electric CITY MULTI CMY-R100NCBK User manual

1
•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:
WARNING
CAUTION
Incorrect handling can result in death or serious injury.
Incorrect handling can result in bodily injury and/or structure damage.
WARNING
Only a dealer or qualied technician should
perform installation.
Properly install all parts according to the
instructions in the Installation Manual.
After installation, check for a refrigerant leak.
Do not make any modications or alterations.
Consult your dealer for repair.
When installing or relocating the unit, check that
no substance other than the specied refrigerant
(R410A) enters the refrigerant circuit.
In the event of a refrigerant leak, thoroughly
ventilate the room.
•Improper installation may result in refrigerant gas leakage and
equipment damage.
•If the wrong twinning pipe or wrong size connecting pipe is used,
air conditioning performance will suffer.
•If leaked refrigerant comes in contact with a heat source, such
as a fan heater, stove, or electric grill, toxic gases will be
generated.
•Improper installation may result in water leakage, electric shock,
or re. •Any presence of foreign substance or air can cause abnormal
pressure rise or explosion.
•If refrigerant leaks and comes in contact with an open ame,
toxic gases will be generated.
CAUTION
Do not touch the refrigerant pipes and refrigerant
circuit components with bare hands during and
immediately after operation.
•During or immediately after operation, certain parts of the unit
such 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 these
parts with bare hands.
Properly dispose of packing materials.
•Plastic bags can pose suffocation and choking hazards: keep
them out of the reach of children. Tear the plastics bags before
disposing of them.
* See the Installation Manual that came with the outdoor unit for installation instructions.
WT09183X01
Mitsubishi Electric Air Conditioner CITY MULTI
CMY-R100NCBK, CMY-R200NCBK, CMY-R300NCBK
Twinning Kit Installation Manual

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1. Conrming the Package Contents
The following items are included with the Twinning Kit (CMY-R100NCBK, CMY-R200NCBK, CMY-R300NCBK). Verify that all items are
present before starting installation.
* Always use the twinning pipes included in the kit when preparing the twinning kit.
If the eld-supplied pipes do not t the parts in the kit, use the accessory piping parts listed below.
Twinning a
Insulation cover
Twinning kit
Pipe b (Before the twinning) Pipe c (After the twinning)
L-shape pipe d (After the twinning)
(1) Twinning pipes
Model Section Twinning a Pipe b (Before the
twinning)
Pipe c (After the
twinning)
L-shape Pipe d
(After the twinning) Insulation cover Installation Manual
CMY-R100NCBK
High-pressure 15.88 [5/8] × 15.88 [5/8] × 19.05 [3/4] - - - Small
1 (This booklet)
Low-pressure 25.4 [1] × 25.4 [1] × 28.58 [1-1/8] OD28.58 [1-1/8]-
ID28.58 [1-1/8]
OD25.4 [1]-
ID22.2 [7/8]
OD25.4 [1]-
ID22.2 [7/8] Large
CMY-R200NCBK
High-pressure 19.05 [3/4] × 19.05 [3/4] × 22.2 [7/8] - - - Small
Low-pressure 25.4 [1] × 25.4 [1] × 28.58 [1-1/8] OD28.58 [1-1/8]-
ID28.58 [1-1/8]
OD25.4 [1]-
ID22.2 [7/8]
OD25.4 [1]-
ID22.2 [7/8] Large
CMY-R300NCBK
High-pressure 19.05 [3/4] × 19.05 [3/4] × 28.58 [1-1/8] - - - Small
Low-pressure 28.58 [1-1/8] × 28.58 [1-1/8]
× 31.75 [1-1/4]
OD31.75 [1-1/4]-
ID34.93 [1-3/8]
OD28.58 [1-1/8]-
ID28.58 [1-1/8]
OD28.58 [1-1/8]-
ID28.58 [1-1/8] Large
(2) Accessory piping parts
Model Section Supplied pipe
CMY-R100NCBK High-pressure OD19.05 [3/4]-ID22.2 [7/8] -
Low-pressure OD22.2 [7/8]-ID19.05 [3/4] (2) -
CMY-R200NCBK High-pressure - -
Low-pressure OD22.2 [7/8]-ID28.58 [1-1/8] (2) OD28.58 [1-1/8]-ID34.93 [1-3/8]
CMY-R300NCBK High-pressure OD19.05 [3/4]-ID22.2 [7/8] (2) -
Low-pressure OD34.93 [1-3/8]-ID41.28 [1-5/8] -
(3) List of eld-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 Pipes and Using the Twinning Kit
(1) Pipe size
1 Field-supply the pipes to be connected to the kit.
2 Select the correct size pipe referring to the Installation
manual of the unit model in use or the Databook.
3 If the pipe was cut with a pipe cutter, remove
the burrs and eliminate foreign materials before
connecting.
PURY-HP144 to HP240, (E)P192 to (E)P240
Set model PURY-HP144 PURY-HP/(E)P192 PURY-(E)P216 PURY-HP/(E)P240
Set Unit Unit 1 PURY-HP72 PURY-HP/(E)P96 PURY-(E)P120 PURY-HP/(E)P120
Unit 2 PURY-HP72 PURY-HP/(E)P96 PURY-(E)P96 PURY-HP/(E)P120
Twinning type CMY-R100NCBK CMY-R200NCBK
Twinning pipe - BC Controller High-pressure a ø22.2 [7/8] ø22.2 [7/8]*
Twinning pipe - BC Controller Low-pressure b ø28.58 [1-1/8] ø34.93 [1-3/8]
* When the high pressure piping length is 65 m (213 ft) or less, use ø22.2 (ø7/8) pipe.
When the high pressure piping length exceeds 65 m (213 ft), use ø22.2 (ø7/8) pipe until 65 m (213 ft), use ø28.58 (ø1-1/8) pipe for the part that exceeds 65 m (213 ft).
Twinning kit
Pipe b (Before the twinning)
Insulation cover
L-shape pipe d (After the twinning)
Twinning a
Pipe c (After the twinning)
Outdoor unit 2Outdoor unit 1
To BC controller (Low pressure pipe)
To BC controller (High pressure pipe)
See reverse.

3
PURY-(E)P264 to (E)P336
Set model PURY-(E)P264 PURY-(E)P288 PURY-(E)P312 PURY-(E)P336
Set Unit Unit 1 PURY-(E)P144 PURY-(E)P144 PURY-(E)P168 PURY-(E)P168
Unit 2 PURY-(E)P120 PURY-(E)P144 PURY-(E)P144 PURY-(E)P168
Twinning type CMY-R300NCBK
Twinning pipe - BC Controller High-pressure a ø28.58 [1-1/8]
Twinning pipe - BC Controller Low-pressure b ø34.93 [1-3/8] ø41.28 [1-5/8]
Twinning pipe - Outdoor unit
Unit model High-pressure Low-pressure
PURY-HP72 ø15.88 [5/8] ø19.05 [3/4]
PURY-HP/(E)P96 ø19.05 [3/4] ø22.2 [7/8]
PURY-HP/(E)P120 ø19.05 [3/4] ø28.58 [1-1/8]
PURY-(E)P144 ø22.2 [7/8] ø28.58 [1-1/8]
PURY-(E)P168 ø22.2 [7/8] ø28.58 [1-1/8]
(2) Slope of twinning pipes
Make sure the slope of the twinning pipes are at an angle
within ±15˚ to the horizontal plane.
If the slope exceeds the specied angle, the unit may be
damaged.
±15˚
(3) The length of the straight pipe between indoor units and the twinning pipe
Use the pipes supplied in the twinning kit, and make sure the section of the eld-supplied pipe that connects to the twinning pipe has
at least 500 mm [19-11/16 in] of straight section. (The section of the eld-supplied pipe that connects to the twinning pipe must have
at least 500 mm [19-11/16 in] of straight section.) If the straight section is less than 500 mm [19-11/16 in], it may result in equipment
damage.
(4) Pipe connection
• Make sure the pipes from the twinning pipe to the outdoor unit are sloped downwards.
A B
• If twinning pipe is installed above the base of the outdoor unit,
it should be no more than 200 mm [7-7/8 in].
• 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. (low-pressure 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 gures indicate branching points.
ⒶⒸ
Ⓑ
Ⓐ
Ⓐ To indoor units
Ⓑ Trap (low-pressure pipe only)
Ⓒ High-pressure pipe
Twinning pipe
Slope of the twinning pipe is at an angle within ±15° to the horizontal plane.
100 mm
[3-15/16 in]
max
Total pipe length = A + B < 5 m [16-7/16 ft]
Unit 2
Upward slope
Unit 1
To BC controller
Downward slope
Twinning pipe
To BC controller
Unit 2Unit 1 Unit 1
To
BC controller
Unit 2
Twinning pipe
200 mm
[7-7/8 in]
max
2 m (6 ft)
≤ 2 m (6 ft)

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WT09183X01
See reverse.
3. Pipe Connection Example
Connect the pipes between outdoor units, referencing the gure at
right.
4. Insulation Cover Installation
Install the insulation cover on the twinning kit after brazing the pipes and twinning kit.
Insulate all refrigerant pipes. Insulate the high-pressure and low-pressure 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: high-pressure = 10 mm [3/8 in],
low-pressure = 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 (eld-supplied).
(1) High-pressure side
(2) Low-pressure side
Field piping
Field piping
Insulation material (field supply)
Insulation material
(field supply)
Field piping
Twinning kit
Insulation cover
Tape (field supply)
Tape (field supply)
5. Miscellaneous Notes
Secure the eld-supplied pipes with a pipe cover and a cable tie in place to keep them from coming in contact with other pipes as
necessary.
The pipe section before the twinning
pipe must have at least 500 mm
(19-11/16 in) of straight section.
Twinning kit
On-site piping
On-site piping
Tape (eld-supplied)
To be gap free
Heat-resistant insulation material (eld-supplied)
Heat-resistant insulation material (eld-supplied)
Insulation cover
To be gap free
eld-supplied pipe
eld-supplied pipe
High-pressure
twinning pipe
eld-supplied pipe
Insulation cover Heat-resistant insulation material (eld-supplied)
Tape (eld-supplied)
Insulation covers can shrink.
Overlap the tape as shown in the left
gure so that there will be no gap in
between the insulation cover or eld-
installed insulation material.
Overlap margin of the tape
Insulation material
(field supply)
Insulation material (field supply)
Tape (field supply)
Insulation cover
Tape (field supply)
Field piping
Field piping
Field piping
Twinning kit