Sanyo SPW-C1155DXHN8 Technical Data & Service Manual page 32

2. System Design
Installing distribution joint
(1) Refer to "HOW TO ATTACH DISTRIBUTION JOINT"
enclosed with the optional distribution joint kit (APR-
CHP680BG, CHP1350BG, P160BG, P680BG,
P1350BG).
(2) In order to prevent accumulation of refrigerant oil in
stopped units, if the main tubing is horizontal then
each branch tubing length should be at an angle that
is greater than horizontal. If the main tubing is vertical,
provide a raised starting portion for each branch.
(3) If there are height differences between indoor units
or if branch tubing that follows a distribution joint is
connected to only 1 unit, a trap or ball valve must be
added to that distribution joint. (When adding the ball
valve, locate it within 40 cm of the distribution joint.)
(Consult with SANYO separately concerning the ball
valve.)
If a trap or ball valve is not added, do not operate
the system before repairs to a malfunctioning unit
is completed. (The refrigerant oil sent through the
tubing to the malfunctioning unit will accumulate
1
and may damage the compressor.)
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Design of W-2WAY ECO-i SYSTEM Unit Specifications
Tube branching methods (horizontal use)
Types of vertical trap specifications
(When using ball valve)
Main tubing
Ball valve
(BV: purchased
separately)
Indoor unit (1)
(When not using ball valve)
Main tubing
Branch tubing is
directed upward.
Indoor unit is directed downward
2-22
B
Horizontal
A
A
line
B
View as seen
from arrow
Arrow view
Indoor unit (more than 2 units)
(If only 1 unit is connected, a ball
valve is also needed on this side.)
Horizontal
(Each unit is
Indoor unit
connected to tubing
that is either level or
is directed
More than
downward.)
20 cm