Hitachi RPIL-1.0PNN1DH Installation & Maintenance Manual page 12

3.2.3 Install the indoor unit.
The installation of the indoor unit is shown in Fig. 3.4.
Suspension bolts (4-M10 or W3/8)
( Field supplied )
Fig. 3.4 The installation of the indoor unit
(1) How to fix the suspension bolts and the nuts
As shown in the figures 3.5, the nuts are fixed four
bolts.
Nut
Indoor unit
Washer
Double nut
Fig. 3.5 Suspension bolts and nuts
(2) Install the indoor unit
·As shown in the following figure, place the left
hanger bracket on the nuts and washers of the
suspension bolts.
·Make sure that the left hanger bracket has been
fixed on the nuts and washers securely, install the
right hanger bracket suspension hook on the nuts
and washers.
(When installing the indoor unit, you can slightly
remove the suspension bolts.)
Hanger bracket
Double nuts
and washers
Fig. 3.6
3.2.4 Adjusting of the unit level
(1) Check to ensure that the foundation is flat, taking
into account the maximum foundation gradient.
(2) The unit should be installed that the drainage
side is slightly [0 in.~ 3/16 in. (0mm~5mm)] lower
than other sides for adequate drainage.
Nuts and
washers (4-
M1 0 or W3/ 8)
(Field supplied)
Suspension bolt
Rack
Indoor unit
Installation and Maintenance
Fig. 3.7
(3) After the adjustment, tighten the nuts and swear the
thread locker on the suspension to prevent the nuts
from loosening.
CAUTION
(1) During the installation, please cover the unit with the
plastic cloth to keep it clean.
(2) Make sure that the unit is installed level by using a
level or a plastic pipe filled with water in instead of a
level, adjust the top surface of the unit to the surface
of the water at both ends of the plastic pipe and adjust
the unit horizontally.(one thing to watch out for in
particular is if it is installed so that the slope is not in
the direction of the drain piping, as this might cause
leaking.)
3.2.5 Installing the duct
CAUTION
• Make sure the external static pressure of the unit is
within the range.
• Connect the duct and intake-side flange.
• Connect the duct and outlet-side flange.
• The connection of indoor unit and air duct must be well
sealed and kept warm with insulation material.
<Example>
Static pressure
box
Canvas duct
Insulation material
Air-outlet
Horizon
The valve for the amount of air
9
Static pressure
box
Canvas duct
Air inlet
Service mouth
(with filter)
24 in. · 24 in.
(600mm · 600mm)
The valve for
the amount of air
Outside air
(through
the filter)