Check Of Limit Density; Installing Distribution Joint - Panasonic U-36LE1U6 Installation Instructions Manual

Always check the gas density
WARNING
limit for the room in which the
unit is installed.

1-10. Check of Limit Density

When installing an air conditioner in a room, it is neces-
sary to ensure that even if the refrigerant gas accidentally
leaks out, its density does not exceed the limit level for
that room.
Pay special attention to any
CAUTION
location, such as a basement,
etc., where leaking refrigerant
can accumulate, since refrig-
erant gas is heavier than air.

1-11. Installing Distribution Joint

(1) Refer to "HOW TO ATTACH DISTRIBUTION JOINT"
enclosed with the optional distribution joint kit
(CZ-P160BK1U).
(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 connect-
ed to only 1 unit, a trap or ball valve must be added to
that distribution joint. (When adding the ball valve,
locate it within 1.3 ft. of the distribution joint.)
If a trap or ball valve is not added, do not operate
the system before repairs to a malfunctioning unit
are completed. (The refrigerant oil sent through the
tubing to the malfunctioning unit will accumulate
and may damage the compressor.)
Tube branching methods (horizontal use)
A
B
Types of vertical trap specifications
(When using ball valve)
Main tubing
Indoor unit (more than 2 units)
Ball valve
(If only 1 unit is connected,
(BV: purchased
a ball valve is also needed on this side.)
separately)
Indoor unit (1)
(When not using ball valve)
Main tubing
Horizontal
Indoor unit (Each unit is connected to
Branch tubing is
directed upward.
More than
8 in.
Indoor unit is directed downward
10
B
Horizontal
A
line
View as seen
from arrow
Arrow view
tubing that is either level
or is directed downward.)