Sanyo Big PACi 18 Series Technical Data & Service Manual page 125

1
Installing Distribution Joint Kit (for Twin &
Double-Twin) (APR-P160BG & APR-P680BG)
For branching tubes, install 150 mm or longer
(including reducer) straight tubing up to the point
where the tube branches (or after the point where
the tubes join together).
150 mm or longer straight tubing up
Use a tube cutter and cut at the size position that
corresponds to the field-supply tube size selected based
on the total indoor unit capacity. (If the size is the same
as the tube end size, cutting is not necessary.)
If the reducer that was supplied in the package is used,
perform brazing on-site.
NO TE
Do not cut in such a way that applies excessive force
and causes deformation of the tube. (This will prevent
insertion of the connecting tube.)
Cut at a position that is as far away as possible from
the dowel pin.
If the distribution joint will be cut before use, cut on the
line marked "cutting location" in the figure below.
Dowel pin
After cutting the tube, be sure to remove any burrs and to
finish the end surface correctly.
(If there is excessive crushing or indentation of the tube,
use a tube expander to expand it.)
Check that there is no dirt or other foreign substance inside
the distribution tubing.
Install the distribution tubing so that it is either horizontal
or vertical. In the case of horizontal, the L-shaped tubing
must be slanted slightly upward (15˚ to 30˚ ).
Use the supplied thermal insulation to insulate the
distribution tubing.
(If other insulation is used, be sure to use insulation that
can withstand temperatures of at least 120˚C.)
Cutting location
Cut as far away as possible
(to ensure proper insertion
clearance for the connecting tube)
Horizontal Installation
Outdoor unit side
Vertical installation (directed upward or downward)
Nitrogen gas replacement required for tube brazing
If nitrogen replacement is not done when brazing is
performed on the indoor and outdoor unit refrigerant
tubing, oxide scale will occur. This scale will clog the
solenoid valves, strainers, and other parts, leading to
malfunction.
Therefore be sure to replace the air in the tubing with
nitrogen when performing brazing in order to prevent
problems from oxide scale.
1-120
Horizontal line
Indoor unit side
Install at a positive angle.
(15 – 30˚)
Horizontal line
Example showing
tubing directed upward