(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.

100mm [4 in]

A

B

To BC controller

Downward slope

 

or more

 

 

To BC controller

Upward slope

High-pressure twinning pipe

Total pipe length = A + B < 5m [16-7/16 ft]

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].

Outdoor unit 1

Outdoor unit 2

High-pressure twinning pipe

To indoor unit

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 low-pressure pipe (field-supplied)

 

Main high-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).

field-supplied pipe

field-supplied pipe

2High-pressure

twinning pipe field-supplied pipe

Heat-resistant insulation material (field-supplied)

Tape (field-supplied)

To be gap free

To be gap free

LInsulation cover

Heat-resistant insulation material (field-supplied)

Insulation cover

Heat-resistant insulation material (field-supplied)

Overlap margin of the tape

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.

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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Mitsumi electronic CMY-R200VBK, CMY-R100VBK Pipe Connection Example, Insulation Cover Installation, Miscellaneous Notes

CMY-R100VBK, CMY-R200VBK specifications

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