Hitachi KPI Installation And Operation Manual page 25

INSTALLATION

CAUTION
Before connecting the ducts, check that no sawdust or any other
foreign matter (scraps of paper, vinyl, etc.) has found its way
inside the ducts.
Do not touch the damper plate inside the main unit when
connecting the ducts.
Do not install the ducts that they show in the next figures. Doing
so will reduce the air volume and give rise to abnormal sounds.
13.5. EXAMPLE FOR INSTALLATION
The example of installation is shown in next figures:
EA (Exhaust
Air Outlet)
OA
(Outdoor
air)
Maintenance
space
SA
(Supply air grille)
RA
(Return
air grille)
Inspection
opening
Extremely sharp bends
Bends right next to the outlet
Air duct
Deep hood
(to prevent
rainwaterfrom
seeping in)
OA (Outdoor
Inspection
Air intake)
opening
EA (Exhaust
Air Outlet)
PMML0185 rev.1 - 03/2010
Multiple bends
Extreme reduction in the
diameter of the connected
ducts
Anchor bolt (to the provided
by user)
SA
RA
(Supply
(Return
Air)
Air) Return
Supply Air
Air
Grille
Grille
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