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(7) 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. Determine the
number of spots based on following table.
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.
(8) Connection of suction, exhaust ducts
(a) Duct connection position
i) 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.)
ii) Exhaust (Make sure to use also the suction.)
Use the side exhaust port.
Good exampleBad exampleBad example
Ceiling surface
Heat
insulation
Suction panel
(Silent panel)
Air conditioner main unit
B Special blowout
(Option)
A Blowout duct
(Optional or marketed item)
C
Hole for check
special inlet (option)
(with air filter)
inlet duct
(optional or
marketat item)
Exhaust hole
State seeing from top of unit
Side fresh air inlet
Rear fresh air inlet
Fig.1
Fig.2
Installation Manual For Indoor Unit
When constructing drain piping for several units, position the common pipe about 100 mm below
the drain outlet of each unit as shown in the sketch. Use VP-30(11/4") or thicker pipe for this purpose.
Be sure to provide heat insulation to hard PVC pipes of indoor placement.
Do not ever provide an air vent.
Avoid positioning the drain piping outlet at a place where generation of odor may be stimulated.
Do not lead the drain piping direct into a sewer from where sulfur gas may generate.
(d)
(e)
(f)
(g)
VP 30
Secure the elevation as high as possible
(approx. 100 mm)
A downhill grade of
1/100 or more