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WARNING
Always check the gas density
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.
If the density could exceed the limit level, it is necessary to
provide an opening between the unit and the adjacent
room, or to install mechanical ventilation which is inter-
locked with the leak detector.
(Total refrigerant charged amount: oz)
(Min. indoor volume where the indoor unit is installed: ft.
3
)
<
Limit density 0.3 (oz/ft.
3
)
The limit density of refrigerant which is used in this unit is
0.3 oz/ft.
3
(ISO 5149).
The shipped outdoor unit comes charged with the amount
of refrigerant fixed for each type, so add it to the amount
that is charged in the field. (For the refrigerant charge
amount at shipment, refer to the unit’s nameplate.)
1-11. Installing Distribution Joint
(1) Refer to “HOW TO ATTACH DISTRIBUTION JOINT”
enclosed with the optional distribution joint kit
(APR-P160BA).
(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.)
(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
are completed. (The refrigerant oil sent through the
tubing to the malfunctioning unit will accumulate
and may damage the compressor.)
Minimum indoor volume & floor area as against the
amount of refrigerant is roughly as given in the following
table.
00
57
114
170
227
284
341
398
454
511
568
625
682
738
795
852
909
966
1022
1079
1136
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
6500
7000
7500
8000
8500
9000
9500
10000
1000500 1500 2000 2500 3000
Total amount of refrigerant
Min. indoor volume
Min. indoor floor area
(when the ceiling is 8.8 ft. high)
ft.
3
ft.
2
oz
Range above
the density limit of
0.3 oz/ft.
3
(countermeasures
needed)
Range below
the density limit of
0.3 oz/ft.
3
(countermeasures
not needed)
15 to 30°
B
A
B
A
Tube branching methods (horizontal use)
Arrow view
Horizontal
line
View as seen
from arrow
Types of vertical trap specifications
(When using ball valve)
Main tubing
Ball valve
(BV: purchased
separately)
Indoor unit (1)
Indoor unit (more than 2 units)
(If only 1 unit is connected,
a ball valve is also needed on this side.)
(When not using ball valve)
Main tubing
Indoor unit is directed downward
More than
8 in.
Horizontal
Indoor unit
(Each unit is connected to
tubing that is either level
or is directed downward.)
Branch tubing is
directed upward.
CAUTION
Pay special attention to any
location, such as a basement,
etc., where leaking refrigerant
can accumulate, since refrig-
erant gas is heavier than air.
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