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b) Reduce the number of bends as much as possible. (Corner R should be as large as possible.)
Indoor unit of
air conditioner
Seiling
surface
Blow outlet
Blow duct
(marketed item)
Keep warm.
Suction
panel
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c) Connecting the air return duct
(Piping side)
Outside air intake
at the rear
Outside air intake
at the side
d) Outside air intake
● Use the intake, which is easier for work, either at the rear or the side.
e) Duct connection
● Connect the 125 mm diameter round duct, using the air return/supply duct flange separately sold (for connecting the
125 mm diameter round duct). (Band clamp)
● Keep the duct warm to protect from condensation.
f) Checking of indoor unit installation level
q There are two kinds of panel, which are TQ-PSA-15W-E panel and TQ-PSB-15W-E panel. When installing to the
existing ceiling, check that opening dimensions in the ceiling are correct.
Check the installation level of the air-conditioner indoor unit and the ceiling members.
w Adjust the air-conditioner indoor unit height so that the under surface of the indoor unit and the under surface of the
ceiling agree with each other. (The air supply port shall be housed in the ceiling.)
e The allowable height difference between the under surface of the ceiling and the under surface of the indoor unit is
less than 5 mm upward shift of the indoor unit.
Do not install the indoor unit lower than the bottom surface of the ceiling.
2) Duct work
a) Calculate air flow volume and the outside static pressure to select the duct’s length and shape, and air supply outlet.
Caution
Take care that the outside static pressure does not exceed 30 Pa.
The unit has condensation owing to the decrease in air capacity, possibly causing the ceiling and household goods to
become wet.
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