4
WT09183X01
See reverse.
3. Pipe Connection Example
Connect the pipes between outdoor units, referencing the figure 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 (field-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 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.
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 (field-supplied)
To be gap free
Heat-resistant insulation material (field-supplied)
Heat-resistant insulation material (field-supplied)
Insulation cover
To be gap free
field-supplied pipe
field-supplied pipe
High-pressure
twinning pipe
field-supplied pipe
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.
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