Air Duct Connection - Hitachi RPIH-3.0HNAUNQ Operation, Installation, And Maintenance Manual

(2) Installation of Indoor Unit
Place the left bracket on the nut and washer of
suspension bolt as shown in the figure below.
Make sure the left bracket is properly placed
on the nut and washer, and put the right
bracket of indoor unit on the nut and washer.
(The suspension bolt can be slightly shifted
for the placement of indoor unit.)
Support Leg
Nut and Washer
Fig. 4.6 Handling Method
4.3.4 Leveling of Indoor Unit
(1) Check to ensure the top surface is level, and
measure the max. top surface inclination degree.
Fig. 4.7 Top Surface Inclination Degree
(2) As shown in Fig. 4.7, the rear part of indoor unit is
slightly lower than its front part (by 0~5mm) so as to
facilitate drainage.
(3) Tighten the suspension nut upon completion of
adjustment. It's essential to apply thread locking
agent to avoid nut looseness.
Please cover the machine with plastic cloth during
installation so as to keep it clean.
Suspension Bolt
Support Leg
Indoor Unit

4.3.5 Air Duct Connection

Air duct is connected to indoor unit via canvas hose
to effectively isolate noise and vibration. Indoor unit
is designed with flange with hole connectible to air
duct.
<Example>
Plenum Chamber Canvas Air Duct Canvas Air Duct Plenum Chamber
Thermal Insulation Material
Volume Damper
(For Fine Adjustment)
Level
Air Outlet
Schedule of External Static Pressure
Factory default
Fig. 4.8 Air Duct Connection
(3) Select copper pipes based on Fig. 5.2.
9
Volume Damper
Outside Air that Passes Filter
Screen
Return Air Inlet
Service Access
(With Filter Screen)
10A
Outside Air