Mitsubishi Electric CITY MULTI CMY-R100XLCBK User manual

1
Mitsubishi Electric Air Conditioner CITY MULTI
CMY-R100XLCBK
Twinning Kit Installation Manual
sFor your safety, thoroughly read the following instructions prior to installation.
Safety Precautions
sThoroughly read the following “Safety Precautions” to ensure proper installation.
sObserve the following important safety precautions at all times.
sHazards 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
CAUTION
Only a dealer or qualified 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 modifications or alterations.
Consult your dealer for repair.
When installing or relocating the unit, check that
no substance other than the specified refrigerant
(R410A) enters the refrigerant circuit.
Do not touch the refrigerant pipes and refrigerant
circuit components with bare hands during and
immediately after operation.
In the event of a refrigerant leak, thoroughly
ventilate the room.
sImproper installation may result in refrigerant gas leakage and
equipment damage.
sIf the wrong twinning pipe or wrong size connecting pipe is used,
air conditioning performance will suffer.
sIf leaked refrigerant comes in contact with a heat source, such
as a fan heater, stove, or electric grill, toxic gases will be
generated.
sImproper installation may result in water leakage, electric shock,
or fire. sAny presence of foreign substance or air can cause abnormal
pressure rise or explosion.
sDuring 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.
sIf refrigerant leaks and comes in contact with an open flame,
toxic gases will be generated.
Properly dispose of packing materials.
sPlastic 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.
WT06205X03

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2. Selecting the Correct Size Refrigerant Pipes and Using the Twinning Kit
(1) Pipe size
1Field-supply the pipes to be connected to the kit.
2Choose the correct size pipe using the table
below. Connect the field-supplied pipe to the
twinning kit for the sizes in the table that are
marked with an asterisk (*).
3If the pipe was cut with a pipe cutter, remove
the burrs and eliminate foreign materials before
connecting.
* On the low-pressure side, the twinning kit connects
to the field-supplied pipes inside the outdoor unit.
The distributor on the low-pressure side must be
placed in the outdoor unit that has a larger capacity
index of the two, regardless of the relative positions
of the outdoor units or their addresses.
If the distributor is placed in the outdoor unit that has
a smaller capacity, refrigerant will not be properly
distributed and compressor failure may result.
(If outdoor units that have the same capacity are
used in combination, the distributor can be placed in
either outdoor unit.)
Package unit name A0
Component unit name Outdoor unit 1 B0
Outdoor unit 2 C0
Outdoor Twinning Kit D0
BC controller ~ Twinning pipe High-pressure A E0
Low-pressure B F0
Unit model High-pressure Low-pressure
C or D E or F
Twinning pipe ~ Outdoor unit
A1 A2 A3
B1 B2 B3
C1 C2 C3
A0 B0 C0 D0 E0 F0
PURY-**
P216 P120 P96
CMY-R100XLCBK ø28.58
[1-1/8]
ø28.58(*)
[1-1/8]
P240 P120 P120
ø34.93(*)
[1-3/8]
P264 P144 P120
P288 P144 P144
A1 B1 C1
A2 B2 C2
A3 B3 C3
PURY-**
P96 P120 P144
ø19.05
[3/4]
ø19.05
[3/4]
ø22.2(*)
[7/8]
ø22.2(*)
[7/8]
ø28.58
[1-1/8]
ø28.58
[1-1/8]
(Unit: mm [in]) (Unit: mm [in])
1. Confirming the Package Contents
The following items are included with the Twinning Kit (CMY-R100XLCBK). 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 field-supplied pipes do not fit the parts in the kit, use the accessory piping parts listed below.
(1) Package contents
Model
1Low-pressure
twinning kit
2High-pressure
twinning pipe 3Fixing screw 4Cable tie 5Elbow pipe
ø28.58 [1-1/8]
6Elbow pipe
ø31.75 [1-1/4]
7High-pressure
pipe (for routing
through the bottom)
8High-pressure
pipe (for routing
through the front)
9Pipe cover
CMY-R100XLCBK 1 1 1 2 1 1 1 1 1
Model
0OD31.75 [1-1/4]
-ID28.58 [1-1/8]
aOD22.2 [7/8]
-ID19.05 [3/4]
bOD19.05 [3/4]
-ID22.2 [7/8]
cOD22.2 [7/8]
-ID28.58 [1-1/8]
dOD28.58 [1-1/8]
-ID22.2 [7/8]
e OD31.75 [1-1/4]
-ID34.93 [1-3/8]
fInstallation
Manual
(this booklet)
gInsulation cover
CMY-R100XLCBK 1 1 3 1 1 1 1 1
(2) 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
DA
C
F
E
B
Outdoor unit 1 Outdoor unit 2
To BC controller
To BC controller
Twinning pipe (High pressure)
Twinning kit
(Low pressure)
See reverse.

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(2) Routing the pipe through the bottom
(1) Braze item 7high-pressure pipe to the refrigerant service valve so
that the dimples on the pipe are parallel to the edge of the cutout
hole. Expand the end of the field-supplied pipes, and braze them to
item 7high-pressure pipe.
(2) Attach item 1low-pressure twinning kit to the sheet metal of the
refrigerant service valve with item 3screw, and braze it to the
refrigerant service valve.
(3) Braze item 6elbow pipe to the field-supplied pipe first, and then
braze it to item 1low-pressure twinning kit.
(4) Flare the field-supplied pipe end, and braze the pipe to the low-
pressure pipe in the middle.
(5) Wrap the pipe in front of item 1low-pressure twinning kit with item
9pipe cover, and attach compressor cables to item 9pipe cover
with item 4cable tie to keep them out of direct contact with the
pipes.
(3) Routing the pipe through the front
(1) Braze item 8high-pressure pipe to the refrigerant service valve.
(2) Attach item 1low-pressure twinning kit to the sheet metal of the
refrigerant service valve with item 3screw, and braze it to the
refrigerant service valve.
(3) Braze item 6elbow pipe to the field-supplied pipe first, and then
braze it to item 1low-pressure twinning kit.
(4) Braze item 5elbow pipe to the low-pressure pipe in the middle.
(5) Wrap the pipe in front of item 1low-pressure twinning kit with item
9pipe cover, and attach compressor cables to item 9pipe cover
with item 4cable tie to keep them out of direct contact with the
pipes.
(4) Slope of twinning pipes (high-pressure side only)
Make sure the slope of the twinning pipes are at an angle
within ±15˚ to the horizontal plane.
If the slope exceeds the specified angle, the unit may be
damaged.
Note. Refer to the figure below for the installation position of the twinning pipe.
(5) The length of the straight pipe between indoor units and the twinning pipe (high-pressure pipe)
Use the pipes supplied in the twinning kit, and make sure the section of the field-supplied pipe that connects to the twinning
pipe has at least 500 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 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.
· Before heating the pipes, place a wet towel on the refrigerant service
valve to keep its temperature below 120
˚C [248˚F] .
· Direct the flame away from the cables and sheet metals inside the unit
so as not to burn them.
CAUTION
· Before heating the pipes, place a wet towel on the refrigerant service
valve to keep its temperature below 120
˚C [248˚F] .
· Direct the flame away from the cables and sheet metals inside the unit
so as not to burn them.
CAUTION
1
3
6
7
Connect the pipe so that the
dimples on the 7high pressure
pipe are parallel to the edge of
the cutout hole.
9
Wrap the pipe cover here.
Attach compressor cables to pipe
cover with cable tie to keep them
out of direct contact with the pipes.
Field-supplied pipes
Field-supplied
pipes
±15˚
Twinning pipe on the high-pressure side
Slope of the twinning pipe is at an angle within ±15° to the horizontal plane.
Wrap the pipe cover here.
Attach compressor cables to pipe
cover with cable tie to keep them
out of direct contact with the pipes.
1
3
6
5
8
9
Field-supplied pipes

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5. Miscellaneous Notes
Secure the field-supplied pipes with a pipe cover and a cable tie in place to keep them from coming in contact with other pipes as
necessary.
WT06205X03
See reverse.
3. Pipe Connection Example
Connect the pipes between outdoor units,
referencing the figure below.
1Low-pressure
twinning kit
2High-pressure twinning pipe
Low-pressure connecting pipe
(field-supplied)
High-pressure connecting pipe
(field-supplied)
Main high-pressure pipe
(field-supplied)
Main low-pressure pipe
(field-supplied)
(6) Pipe connection (high-pressure side)
· Make sure the pipes from the twinning pipe to the outdoor unit are sloped downwards.
· If high-pressure twinning pipe is installed above the base of the outdoor unit, it should be no more than 200 mm [7-7/8 in].
A B
To BC controller
High-pressure twinning pipe
Total pipe length = A + B < 5 m [16-7/16 ft]
To BC controller
Upward slope
Downward slope
100 mm [3-
15/16 in]
or more
To
BC controller
200 mm
[7-7/8 in]
max.
High-pressure
Twinning pipe
Outdoor unit 1 Outdoor unit 2
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 [13/32 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 (field-supplied).
Tape (field-supplied)
Insulation cover Heat-resistant insulation material (field-supplied)
Tape (field-supplied)
Insulation covers can shrink.
Overlap the tape as shown in the
left figure so that there will be no
gap in between the insulation cover
or field-installed insulation material.
Heat-resistant insulation material (field-supplied)
Heat-resistant insulation material (field-supplied)
To be gap free
To be gap free
field-supplied pipe
field-supplied pipe
field-supplied pipe
gInsulation cover
2High-pressure
twinning pipe
Overlap margin of the tape