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3. Selecting an installation site
• Select a location so that air can be blown into all corners of the room.
• Avoid locations exposed to outside air.
• Select a location free of obstructions to the airflow in and out of the unit.
• Avoid locations exposed to stream or oil vapour.
• Avoid locations where combustible gas may leak, settle or be generated.
• Avoid installation near machines emitting high-frequency waves (high-
frequency welders, etc.)
• Avoid locations where the airflow is directed at a fire alarm sensor. (Hot air
could trigger the alarm during the heating operation.)
• Avoid places where acidic solutions are frequently handled.
• Avoid places where sulphur-based or other sprays are frequently used.
• 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 condi-
tion, add insulation material (10-20 mm [13/32-13/16 in]) to the entire surface
of the indoor unit to avoid due condensation.
Warning:
Install the indoor unit on a ceiling strong enough to sustain its weight.
If the ceiling lacks strength, it may cause the unit to fall down, resulting in
an injury.
3.1. Installation and servicing space
Refrigerant piping, drain piping, wiring, and other components should be in-
stalled outside the
areas, and free of the access doors to ensure that they
do not hinder fan maintenance.
[Fig. 3.1.1] (P.2)
A Fan and motor removal door
B Duct dimension
4. Fixing hanging bolts
4.1. Fixing hanging bolts
(Give site of suspension strong structure.)
Hanging structure
• Ceiling: The ceiling structure varies from building to one another. For de-
tailed 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).
Center of gravity and Product Weight
Model name
W (mm) [in]
PEFY-P15NMHU-E2
814 [32-1/16]
PEFY-P18NMHU-E2
814 [32-1/16]
PEFY-P24NMHU-E2
814 [32-1/16]
PEFY-P27NMHU-E2
814 [32-1/16]
PEFY-P30NMHU-E2
814 [32-1/16]
PEFY-P36NMHU-E2
814 [32-1/16]
PEFY-P48NMHU-E2
814 [32-1/16]
PEFY-P54NMHU-E2
814 [32-1/16]
5. Installing the unit
5.1. Hanging the unit body
u Bring the indoor unit to an installation site as it is packed.
u To hang the indoor unit, use a lifting machine to lift and pass through
the hanging bolts.
u Install the indoor unit before ceiling joist construction.
[Fig. 5.1.1] (P.2)
A Unit body
B Lifting machine
[Fig. 5.1.2] (P.2)
C Nuts (field supply)
D Washers
E M10 Hanging bolt (field supply)
L (mm) [in]
H (mm) [in]
754 [29-11/16]
210 [8-5/16]
754 [29-11/16]
210 [8-5/16]
754 [29-11/16]
210 [8-5/16]
1039 [40-15/16]
210 [8-5/16]
1039 [40-15/16]
210 [8-5/16]
1204 [47-7/16]
210 [8-5/16]
1204 [47-7/16]
210 [8-5/16]
1204 [47-7/16]
210 [8-5/16]
Note:
Always install access doors in the specified positions for service main-
tenance.
Type
PEFY-P15·18·24NMHU-E2
[26-13/16]
PEFY-P27·30NMHU-E2
PEFY-P36·48·54NMHU-E2
[44-1/2]
Warning:
Install the unit on a ceiling strong enough to support its weight.
• If the unit is mounted on a structure of insufficient strength it may fall
causing injury.
[Fig. 3.1.2] (P.2)
B Duct dimension
D Air inlet
F Access door
H Air outlet
J Ceiling
L More than 20 mm [13/16 in]
3.2. Combining indoor units with outdoor
units
For combining indoor units with outdoor units, refer to the outdoor unit installa-
tion manual.
1 Reinforcing the ceiling with additional members (edge beam, etc.) must be
required to keep the ceiling at level and to prevent the ceiling from vibrations.
2 Cut and remove the ceiling members.
3 Reinforce the ceiling members, and add other members for fixing the ceiling
boards.
[Fig. 4.1.1] (P.2)
A Center of gravity
X (mm) [in]
Y (mm) [in]
374 [14-3/4]
440 [17-3/8]
374 [14-3/4]
440 [17-3/8]
374 [14-3/4]
440 [17-3/8]
364 [14-3/8]
548 [21-5/8]
364 [14-3/8]
548 [21-5/8]
364 [14-3/8]
649 [25-9/16]
364 [14-3/8]
649 [25-9/16]
364 [14-3/8]
649 [25-9/16]
5.2. Confirming the unit's position and fix-
ing hanging bolts
u 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.
u 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.
u To ensure that drain is discharged, be sure to hang the unit at level us-
ing a level.
[Fig. 5.2.1] (P.2)
A Bottom of indoor unit
Caution:
Be sure to install the unit body at level.
(Unit: mm [in])
A
B
C
680
754
550
600
[29-11/16]
[21-11/16]
[23-5/8]
965
1039
835
885
[38]
[40-15/16]
[32-7/8]
[34-7/8]
1130
1204
1000
1050
[47-7/16]
[39-3/8]
[41-3/8]
C Electrical components case
E Top of unit
G Servicing space
I Hanging bolt spacing
K More than 100 mm [3-15/16 in]
Z (mm) [in]
Product Weight (kg) [lb]
190 [7-1/2]
44 [98]
190 [7-1/2]
44 [98]
190 [7-1/2]
45 [100]
190 [7-1/2]
56 [124]
190 [7-1/2]
56 [124]
190 [7-1/2]
69 [153]
190 [7-1/2]
69 [153]
190 [7-1/2]
71 [157]
D
7
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