Mitsubishi Electric Air Conditioner CITY MULTI
CMY-R100VBK, CMY-R200VBK
Twinning Kit Installation Manual
WT05221X02
¡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:
Incorrect handling can result in death or serious injury.
WARNING
Incorrect handling can result in bodily injury and/or structure damage.
CAUTION
WARNING
Only a dealer or qualified technician should
perform installation.
Properly install all parts according to the
instructions in the Installation Manual.
¡Improper installation may result in refrigerant gas leakage
¡If the wrong twinning pipe or wrong size connecting pipe is
and equipment damage.
used, air conditioning performance will suffer.
When installing or relocating the unit, check
that no substance other than the specified
refrigerant (R410A) enters the refrigerant circuit.
Do not make any modifications or alterations.
Consult your dealer for repair.
¡Improper installation may result in water leakage, electric shock,
¡Any presence of foreign substance or air can cause abnormal
or fire.
pressure rise or explosion.
In the event of a refrigerant leak, thoroughly
ventilate the room.
After installation, check for a refrigerant leak.
¡If leaked refrigerant comes in contact with a heat source,
such as a fan heater, stove, or electric grill, toxic gases will be
generated.
¡If refrigerant leaks and comes in contact with an open flame,
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.
1
(2) Low-pressure twinning kit in CMY-R100VBK
Use either F or G in table 1,(1) Package Contents
depending on the size of the pipe at the control valve on
the unit to be combined with. Attach items H, I, and J
to the stop valve sheet metal and then to the low-pressure
twinning kit to hold it into place.
3
3
1
F or G
H,I,J
Stop valve
1. Attach item J to the stop valve sheet metal.
2. Attach the packing and saddle.
3. Secure the low pressure twinning kit.
Section to be brazed field-supplied
(3) Routing the pipe through the bottom
(1) Braze item 7high-pressure pipe to the stop 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.
1
3
(2) Attach item 1low-pressure twinning kit to the sheet metal of the
control valve with item 3screw, and braze it to the control valve.
(3) Braze item 5or 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.
Connect the pipe so that the
dimples on the 7 high pressure
pipe are on an imaginary line
parallel to the edge of the
cutout hole.
(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 M cable tie to keep them out of direct contact with the pipes.
CAUTION
· Before heating the pipes, place a wet towel on the control valve to
5,6
Field-supplied pipes
Field-supplied
keep its temperature below 120 ˚C [248˚F]
.
pipes
· Direct the flame away from the cables and sheet metals inside the
unit so as not to burn them.
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.
1
(4) Routing the pipe through the front
3
(1) Braze item 8high-pressure pipe to the control valve.
(2) Attach item 1low-pressure twinning kit to the sheet metal of the
control valve with item 3screw, and braze it to the control valve.
(3) Braze item 5or 6elbow pipe to the field-supplied pipe first,
and then braze it to item 1 low-pressure twinning kit.
(4) Braze either item 4or 5elbow pipe to the low-pressure pipe in
the middle.
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.
(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 M cable tie to keep them out of direct contact
with the pipes.
CAUTION
· Before heating the pipes, place a wet towel on the control 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.
.
5,6
Field-supplied pipes
4,5
8
Note. Refer to the figure below for the installation position of the twinning pipe.
Twinning pipe on the high-pressure side
(5) 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.
Slope of the twinning pipe is at an angle within ±15˚ to the horizontal plane.
3
(6) 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.
(7) Pipe connection (high-pressure side)
Make sure pipes from the twinning pipe to the outdoor unit are sloped downwards.
Outdoor unit 1
Outdoor unit 2
A
B
100mm [4 in]
or more
To BC controller
Downward slope
To BC controller
Upward slope
High-pressure
twinning pipe
High-pressure twinning pipe
Total pipe length = A + B < 5m [16-7/16 ft]
To indoor unit
200mm max.
·
If high-pressure twinning pipe is installed above the base of the
outdoor unit, it should be no more than 200mm [7-7/8 in].
3. Pipe Connection Example
Connect the pipes between outdoor units,
using the figure below as a reference.
1Low-pressure twinning kit
Low-pressure connecting pipe
(field-supplied)
High-pressure connecting pipe
(field-supplied)
2High-pressure twinning pipe
Main high-pressure pipe (field-supplied)
Main low-pressure pipe (field-supplied)
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).
Heat-resistant insulation material (field-supplied)
Tape (field-supplied)
field-supplied pipe
To be gap free
field-supplied pipe
To be gap free
2High-pressure
twinning pipe
field-supplied pipe
LInsulation cover
Heat-resistant insulation material (field-supplied)
Insulation cover
Heat-resistant insulation material (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.
Overlap margin of the tape
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.
WT05221X02
See reverse.
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