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•
If the unit is run for long hours when the air above the ceiling is at high tem-
perature/high humidity (due point above 26°C [79°F]), due condensation may
be produced in the indoor unit. When operating the units in this condition, add
insulation material (10-20 mm [13/32 to 13/16 in]) to the entire surface of the
indoor unit to avoid due condensation.
3.1. Install the indoor unit on a ceiling strong
enough to sustain its weight
Warning:
The unit must be securely installed on a structure that can sustain its weight. If
the unit is mounted on an unstable structure, it may fall down causing injuries.
3.2. Securing installation and service space
Secure enough access space to allow for the maintenance, inspection, and re-
placement of the motor, fan, drain pump, heat exchanger, and electric box in one
of the following ways.
Select an installation site for the indoor unit so that its maintenance access space
will not be obstructed by beams or other objects.
(1) When a space of 300 mm [11-13/16 in] or more is available below the unit
between the unit and the ceiling (Fig. 3.2.1)
• Create access door 1 and 2 (450 x 450 mm [17-3/4 x 17-3/4 in] each) as shown
in Fig. 3.2.2. (Access door 2 is not required if enough space is available below
the unit for a maintenance worker to work in.)
4. Fixing hanging bolts
4.1
Fixing hanging bolts
[Fig. 4.1.1] (P.3)
A Center of gravity
(Give site of suspension strong structure.)
Center of gravity and Product Weight
Model name
PEFY-P06NMAU-E3
PEFY-P08NMAU-E3
PEFY-P12NMAU-E3
PEFY-P15NMAU-E3
PEFY-P18NMAU-E3
PEFY-P24NMAU-E3
PEFY-P27NMAU-E3
PEFY-P30NMAU-E3
PEFY-P36NMAU-E3
PEFY-P48NMAU-E3
PEFY-P54NMAU-E3
5. Installing the unit
5.1. Hanging the unit body
Bring the indoor unit to an installation site as it is packed.
To hang the indoor unit, use a lifting machine to lift and pass through the
hanging bolts.
[Fig. 5.1.1] (P.3)
A Unit body
B Lifting machine
[Fig. 5.1.2] (P.3)
C Nuts (field supply)
D Washers (square) (accessory)
E M10 hanging bolt (field supply)
6. Refrigerant pipe and drain pipe specifications
To avoid dew drops, provide sufficient antisweating and insulating work to the
refrigerant and drain pipes.
When using commercially available refrigerant pipes, be sure to wind commercially
available insulating material (with a heat-resisting temperature of more than 100°C
[212°F] and thickness given below) onto both liquid and gas pipes.
Insulate all indoor pipes with form polyethylene insulation with a minimum density
of 0.03 and a thickness as specified in the table below.
W (mm [in])
L (mm [in])
643 [25-5/16]
754 [29-11/16]
643 [25-5/16]
754 [29-11/16]
643 [25-5/16]
754 [29-11/16]
643 [25-5/16]
954 [37-9/16]
643 [25-5/16]
954 [37-9/16]
643 [25-5/16]
1154 [45-7/16]
643 [25-5/16]
1154 [45-7/16]
643 [25-5/16]
1154 [45-7/16]
643 [25-5/16]
1454 [57-1/4]
643 [25-5/16]
1454 [57-1/4]
643 [25-5/16]
1654 [65-1/8]
(2) When a space of less than 300 mm [11-13/16 in] is available below the unit
between the unit and the ceiling (At least 20 mm [13/16 in] of space should be
left below the unit as shown in Fig. 3.2.3.)
• Create access door 1 diagonally below the electric box and access door 3
below the unit as shown in Fig. 3.2.4.
or
• Create access door 4 below the electric box and the unit as shown in Fig. 3.2.5.
[Fig. 3.2.1] (P.2)
[Fig. 3.2.2] (Viewed from the direction of the arrow A) (P.2)
[Fig. 3.2.3] (P.2)
[Fig. 3.2.4] (Viewed from the direction of the arrow B) (P.2)
[Fig. 3.2.5] (Viewed from the direction of the arrow B) (P.2)
A Electric box
C Ceiling beam
D Access door 2 (450 mm x 450 mm [17-3/4 in x 17-3/4 in])
E Access door 1 (450 mm x 450 mm [17-3/4 in x 17-3/4 in])
F Maintenance access space
H Intake air
J Access door 3
3.3. Combining indoor units with outdoor
units
For combining indoor units with outdoor units, refer to the outdoor unit installation
manual.
Hanging structure
•
Ceiling: The ceiling structure varies from building to one another. For detailed
information, consult your construction company.
•
If necessary, reinforce the hanging bolts with anti-quake supporting members
as countermeasures against earthquakes.
* Use M10 for hanging bolts and anti-quake supporting members (field supply).
X (mm [in])
Y (mm [in])
330 [13]
300 [11-13/16]
330 [13]
300 [11-13/16]
330 [13]
300 [11-13/16]
340 [13-3/8]
375 [14-3/4]
340 [13-3/8]
375 [14-3/4]
325 [12-13/16]
525 [20-11/16]
325 [12-13/16]
525 [20-11/16]
325 [12-13/16]
525 [20-11/16]
330 [13]
675 [26-9/16]
330 [13]
675 [26-9/16]
332 [13-1/16]
725 [28-9/16]
5.2. Confirming the unit's position and fixing
hanging bolts
Use the gage supplied with the panel to confirm that the unit body and
hanging bolts are positioned in place. If they are not positioned in place, it
may result in dew drops due to wind leak. Be sure to check the positional
relationship.
Use a level to check that the surface indicated by A is at level. Ensure
that the hanging bolt nuts are tightened to fix the hanging bolts.
To ensure that drain is discharged, be sure to hang the unit at level using
a level.
[Fig. 5.2.1] (P.3)
A Indoor unit's bottom surface
Caution:
Install the unit in horizontal position. If the side with drain port is installed
higher, water leakage may be caused.
1 Select the thickness of insulating material by pipe size.
Pipe size
6.4 mm to 25.4 mm [1/4 to 1 in]
28.6 mm to 38.1 mm [1-1/8 to 1-1/2 in]
2 If the unit is used on the highest story of a building and under conditions of
high temperature and humidity, it is necessary to use pipe size and insulating
material's thickness more than those given in the table above.
3 If there are customer's specifications, simply follow them.
B Ceiling
G Supply air
I Bottom of indoor unit
K Access door 4
Z (mm [in])
Product Weight (kg [lb])
130 [5-1/8]
22 [49]
130 [5-1/8]
22 [49]
130 [5-1/8]
22 [49]
130 [5-1/8]
26 [58]
130 [5-1/8]
26 [58]
130 [5-1/8]
30 [67]
130 [5-1/8]
30 [67]
130 [5-1/8]
30 [67]
130 [5-1/8]
39 [86]
130 [5-1/8]
39 [86]
130 [5-1/8]
42 [93]
Insulating material's thickness
More than 10 mm [7/16 in]
More than 15 mm [5/8 in]
9
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