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Installation work for air outlet ducts
Calculate the draft and external static pressure and select the length,
shape and blowout.
A Blowout duct
2-spot, 3-spot and 4-spot with 200 type duct are the standard
specifications.
Note (1) Shield the central blowout hole for 2-spot.
(2) Shield the blowout hole around the center for 3-spot.
Limit the difference in length between spots at less than 2:1.
Reduce the length of duct as much as possible.
Reduce the number of bends as much as possible. (Corner R should
be as larger as possible.)
Use a band. etc. to connect the main unit and the blowout duct
flange.
Conduct the duct installation work before finishing the ceiling.
Connection of suction, exhaust ducts
a.Fresh air inlet
Inlet can be selected from the side or rear faces depending on the
working conditions.
Use the rear fresh air inlet when the simultaneous intake and exhaust
is conducted. (Side inlet cannot be used.)
b.Exhaust (Make sure to use also the suction.)
Use the side exhaust port.
Good exampleBad exampleBad example
Exhaust hole
State seeing from top of unit
Side fresh air inlet
Rear fresh air inlet
Fig.1
Fig.2
Drainage Test
Conduct a drainage test after completion of the electrical work.
During the trial, make sure that drain flows properly through the
piping and that no water leaks from connections.
In case of a new building, conduct the test before it is furnished
with the ceiling.
Be sure to conduct this test even when the unit is installed in the
heating season.
Attached drain hose clamp
Drain piping
Main unit
Drain situation can be checked with transparent socket
Remove grommet.
Make sure to install
it back after test.
Insert water supply hose
for 20 mm ~ 30 mm to
supply water.
(Insert hose facing
toward bottom.)
Pour water into a convex joint.
Procedures
Supply about 1000 cc of water to the unit through the air outlet
using a feed water pump.
Check the drain while cooling operation.
Before the electrical work has not been completed, connect a convex
joint in the drain pipe connection to provide a water inlet. Then, check
if water leaks from the piping system and that drain flows through
the drain pipe normally.
(1)
(2)
(3)
(4)
(a)
(b)
Ceiling surface
Heat
insulation
Suction panel
(Silent panel)
Air conditioner main unit
Special
blowout
(Option)
Blowout duct
(Optional or
marketed
item)
Hole for check
special inlet
(option) (with air
filter)
inlet duct
(optional or
marketat item)
B
A
C
Drain Pipe
Air Duct
Installation Procedure
25
Installation Procedure