3
(2) Routing the pipe through the bottom
(1) Braze item
7
high-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
7
high-pressure pipe.
(2) Attach item
1
low-pressure twinning kit to the sheet metal of the
refrigerant service valve with item
3
screw, and braze it to the
refrigerant service valve.
(3) Braze item
6
elbow pipe to the field-supplied pipe first, and then
braze it to item
1
low-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
1
low-pressure twinning kit with item
9
pipe cover, and attach compressor cables to item
9
pipe cover
with item
4
cable tie to keep them out of direct contact with the
pipes.
(3) Routing the pipe through the front
(1) Braze item
8
high-pressure pipe to the refrigerant service valve.
(2) Attach item
1
low-pressure twinning kit to the sheet metal of the
refrigerant service valve with item
3
screw, and braze it to the
refrigerant service valve.
(3) Braze item
6
elbow pipe to the field-supplied pipe first, and then
braze it to item
1
low-pressure twinning kit.
(4) Braze item
5
elbow pipe to the low-pressure pipe in the middle.
(5) Wrap the pipe in front of item
1
low-pressure twinning kit with item
9
pipe cover, and attach compressor cables to item
9
pipe cover
with item
4
cable 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
7
high 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
