Hitachi P-AP160NA1 Installation And Operation Manual page 11

indoor unit installation
3.1.2 Initial Check
¡ install the indoor unit with a proper clearance around it pa-
ying careful attention of installation direction for the piping,
wiring and maintenance working space, as shown below.
¡ Provide a service access door near the unit piping connec-
tion area on the ceiling.
Service Access
Service
Door
Access
Door
Drain Piping Connection
¡ Check space between ceiling and false ceiling is enough
as indicated below.
¡ Check the ceiling surface is flat for the air panel installation
work.
Unit HP
RCi-1.0 to 2.5HP
RCi-3.0 to 6.0HP
Check down slope Pitch of Drain Piping is following the specifica-
tions indicated in chapter Drain Piping.
Opening Of False Ceiling

- Cut out the area for the indoor unit in the false ceiling and
install suspension bolts, as shown below.
Dimension of opening
20
860 to 910
(Unit size)
840
760
(Dimension of
suspension bolts)
Piping connection
side
connection side
- Check to ensure that the ceiling is horizontally level,
otherwise water can not flow.
- Strengthen the opening parts of the false ceiling.
7 PmmL0223A rev.0 - 05/2012 - P5415035
Piping
Connection
Clearance:
10-20mm
Unit High
in false Ceiling
A(mm)
248
298
20
4-12 x 32 Holes
(for suspension bolt)
4-Positions of
suspension bolts
Drain piping
(m10 or W3/8)
(field-supplied)
3.1.3 Installation
Mounting of Suspension Bolts

mount suspension bolts using m10 (W3/8) as size, as shown.
150 to 160mm
(mm)
Steel
i-Beam
Mounting of Indoor Unit

- mount the nuts and the washers to the suspension bolts.
Put the washer so that the surface with insulation can fa-
ces downwards as shown below:
Suspension Bolts (field-Supplied)
Washer with insulation (Accessory)
Suspension Bracket (Attached indoor Unit)
- Consider piping connection side before lift indoor unit.
- Lift the indoor unit by hoist, and do not put any force on
the drain pan.
- Secure the indoor unit using the nuts and washers.
Suspension bolt
(mm)
Suspension
bracket
Drain pan
N O T E
• If a false ceiling has already been installed, complete all pi-
ping and wiring work inside the ceiling before hooking-up the
indoor unit.
• Secure the indoor unit using the nuts, and flat washers.
For concrete slab:
insert (100 to 150Kg)
Concrete
Anchor Bolt (W3/8 or m10)
For steel beam:
Suspension Bolt
(w3/8 or m10)
Nut (field-Supplied)
Washer (Accessory)
Nut (field-Supplied)
Surface of Ceiling
(mm)