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(6) Pipe connection (high-pressure side)
· Make sure the pipes from the twinning pipe to the outdoor unit are sloped downwards.
100 mm [3-
A
B
Downward slope
15/16 in]
or more
High-pressure twinning pipe
Total pipe length = A + B < 5 m [16-7/16 ft]
Upward slope
· 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].
3. Pipe Connection Example
Connect the pipes between outdoor units,
referencing the figure below.
1 Low-pressure
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
2 High-pressure
twinning pipe
field-supplied pipe
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.
Outdoor unit 1
To BC controller
200 mm
[7-7/8 in]
max.
To BC controller
twinning kit
Low-pressure connecting pipe
(field-supplied)
High-pressure connecting pipe
(field-supplied)
Heat-resistant insulation material (field-supplied)
To be gap free
To be gap free
g Insulation cover
Heat-resistant insulation material (field-supplied)
Insulation cover
Heat-resistant insulation material (field-supplied)
Overlap margin of the tape
4
Outdoor unit 2
High-pressure
Twinning pipe
2 High-pressure twinning pipe
Main high-pressure pipe
(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.
Tape (field-supplied)
To
BC controller
Main low-pressure pipe
(field-supplied)
WT06205X03
See reverse.
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