9
en
• Do not install unit at a site where fire detector is located at the supply air side.
(Fire detector may operate erroneously due to the heated air supplied during
heating operation.)
• When special chemical product may scatter around such as site chemical plants
and hospitals, full investigation is required before installing unit. (The plastic
components may be damaged depending on the chemical product applied.)
• If the unit is run for long hours at high temperature/ high humidity (dew point
above 26 °C), dew condensation may be produced in the indoor unit. When
operating the units in this condition, add insulation material (10-20 mm) to the
entire surface of the indoor unit to avoid dew condensation.
• Do not place things that are vulnerable to water damage under the unit.
Condensation may form in a situation such as when foreign object is trapped in
the LEV. Install an emergency drain pan under the unit as necessary.
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 inju-
ries.
3.1. Securing installation and service space
[Fig. 3.1.1] (P.2)
3.2. Combining indoor units with outdoor units
For combining indoor units with outdoor units, refer to the outdoor unit installation
manual.
4. Installing the unit
4.1. Assembling the unit
Install the unit frame in parallel with the floor securely when installing.
There are the following two methods of installing the unit.
For fixing on the floor
[Fig. 4.1.1] [Fig. 4.1.2] (P.2)
For fixing on the wall
[Fig. 4.1.3] (P.2)
To fix the indoor unit on the wall, use the hanging bolts.
[Fig. 4.1.4] (P.2)
When the unit is installed on the wall, vibrations may be transmitted to the
wall. Take measures against vibrations as needed at the site.
4.2. Center of gravity and product weight
[Fig. 4.2.1] (P.3)
4.3. Confirming the unit’s position and fixing hanging
bolts
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.
Caution:
Install the unit in horizontal position. If the side with drain port is installed
higher, water leakage may be caused.
5. Refrigerant pipe and drain pipe specifications
To avoid dew drops, provide sufficient antisweating and insulating work to the refrig-
erant 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
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.
1
Select the thickness of insulating material by pipe size.
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 mate-
rial’s thickness more than those given in the table above.
3
If there are customer’s specifications, simply follow them.
5.1. Refrigerant pipe and drain pipe specifications
5.2. Refrigerant pipe, drain pipe
[Fig. 5.2.1] (P.3)
A
Floor
B
Piping space
C
Electrical part service space
For PFFY-P-VCM-E
(mm)
Model name
(A)
(B)
20
·
25
·
32
700
More than 240
40
·
50
900
More than 240
63
1100
More than 240
<Viewed from top of the unit>
A
Leg
B
Screw
C
Wall
<Viewed from front of the unit>
A
Floor
A
Nuts (field supply)
B
Washers
C
M10 hanging bolt (field supply)
For PFFY-P-VCM-E
(mm)
Model name
(E)
(F)
20
·
25
·
32
730
756
40
·
50
930
956
63
1130
1156
A
Floor hole for fixing
For PFFY-P-VCM-E
Model name
W
(mm)
L
(mm)
X
(mm)
Y
(mm)
Z
(mm)
Product weight
(kg)
PFFY-P20VCM-E
730
95
5
365
290
18
PFFY-P25VCM-E
730
95
5
365
290
18
PFFY-P32VCM-E
730
95
5
365
290
18.5
PFFY-P40VCM-E
930
95
5
495
300
22.5
PFFY-P50VCM-E
930
95
5
495
300
22.5
PFFY-P63VCM-E
1130
95
5
615
320
25.5
Pipe size
Insulating material’s thickness
6.4 mm to 25.4 mm
More than 10 mm
28.6 mm to 38.1 mm
More than 15 mm
PFFY-P·VCM-E
20·25·32·40·50
63
Refrigerant pipe
(Brazing connection)
Liquid pipe
ø 6.35
ø 9.52
Gas pipe
ø 12.7
ø 15.88
Drain pipe
O.D. ø 32
Item
Model
A
Refrigerant piping (liquid)
B
Refrigerant piping (gas)
C
Drain outlet
VG79D813H01_en.book 9 ページ ２０１８年１２月１４日 金曜日 午前１１時２０分
