Selecting The Installation Site - Panasonic U-8ME1E8 Mode D'emploi

Be sure to check the limit density for the room in which the indoor unit is installed.
CAUTION
Checking of limit density
Density limit is determined on the basis of the size of a room
using an indoor unit of minimum capacity.
For instance, when an indoor unit is used in a room (floor area
15m 2 × ceiling height 2.7m = room volume 40.5m 3 ), the graph
at right shows that the maximum overall refrigerant charge
3
amount of limit density (0.3kg/m ) that is not required to install a
ventilation fan should be calculated as follows.
Due to the room volume,
Maximum overall refrigerant charge amount
= (room volume) × (limit density)
= 40.5 (m 3 ) × 0.3 (kg/m 3 )
= 12.15 kg
Overall refrigerant charge amount for this system is 72.137(kg).
The formula for the minimum room volume should be
determined as follows.
Required minimum room volume
= (overall refrigerant charge amount) ÷ (limit density)
= 72.137 (kg) ÷ 0.3 (kg/m 3 )
= 240.5 (m 3 )
Required minimum floor area
= (minimum room volume) ÷ (ceiling height)
= 240.5 (m 3 ) ÷ 2.7 (m)
= 89.1 (m 2 )
Therefore an opening for ventilation is required.
< Formula for computation >
Overall refrigerant charge amount for the air conditioner: kg
(Minimum room volume for indoor unit: m 3 )
72.137 (kg)
=
40.5 (m³)
= 1.78 (kg/m 3 ) > 0.3 (kg/m³)
Accordingly, it is necessary to install a ventilation fan for this
room.
SUPPLEMENT
m 2 m 3
125 337.5
120 324.0
115 310.5
110 297.0
105 283.5
100 270.0
95 256.0
90 243.0
Range below the
85 229.5
density limit of
80 216.0
0.3 kg/m³
75 202.5
(Countermeasures
70 189.0
not needed)
65 175.5
60 162.0
55 148.5
Range above the
50 135.0
density limit of 0.3
45 121.5
kg/m³
40 108.0
(Countermeasures
35 94.5
needed)
30 81.0
25 67.5
20 54.0
15 40.5
10 27.0
5 13.5
0 0.0
0 10 20 30 40 50 60 70 80 90 100
Total amount of refrigerant
17

2. SELECTING THE INSTALLATION SITE

2-1. Outdoor Unit
AVOID:
● heat sources, exhaust fans, etc.
● damp, humid or uneven locations
● indoors (no-ventilation location)
DO:
● choose a place as cool as possible.
● choose a place that is well ventilated.
● allow enough room around the unit for air intake/
exhaust and possible maintenance.
Exhaust fan
Hot air
Out-
door
unit
kg
Fig. 2-1
Installation Space
Install the outdoor unit where there is enough space for
ventilation. Otherwise the unit may not operate properly. Fig.
2-2 shows the minimum space requirement around the outdoor
units when 3 sides are open and only 1 side is shuttered, with
open space above the unit. The mounting base should be
concrete or a similar material that allows for adequate drainage.
Make provisions for anchor bolts, platform height, and other
site-specifi c installation requirements.
● Leave space open above the
unit.
CAUTION
● Construct louvers or other
openings in the wall, if
necessary, to ensure adequate
ventilation.
NOTE
● Do not do any wiring or tubing within 30 cm of the front
panel, because this space is needed as a servicing space for
the compressor.
● Ensure a base height of 100 mm or more to ensure that
drainage water does not accumulate and freeze around the
bottom of the unit.
● If installing a drain pan, install the drain pan prior to
installing the outdoor unit.
* Make sure there is at least 150 mm between the outdoor
unit and the ground.
Also, the direction of the tubing and electrical wiring should
be from the front of the outdoor unit.
Example of installation of 2 units
(when 3 sides are open and only 1 side is shuttered)
* More than 300 mm
** More than
50 mm
*** More than 60 mm
* Make a walk-in space behind the unit to erase maintenance and servicing.
** When setting the anchor bolt to position "B" or "C" (See Fig. 2-3), make
the space between the unit and the wall more than 250 mm for installation
operation.
*** When setting the anchor bolt to position "B" or "C" (See Fig. 2-3), make
the space between the outdoor units more than 180 mm for installation
operation.
Fig. 2-2
Heat
Top view
source
Installation anchor hole
(8 – 15 × 21 elongated holes)
Air intake
Air
intake
Air
intake
740
(Installation hole pitch)
770
Top view
Installation anchor hole
(8 – 15 × 21 elongated holes)
Air intake
Air
intake
Air
intake
970
(Installation hole pitch)
1000
Top view
Installation anchor hole
(8 – 15 × 21 elongated holes)
Air intake
Air
intake
Air
intake
1510
(Installation hole pitch)
1540
* According to the installation site, you may choose the setting position in the
depth direction of the anchor bolt from "A", "B" or "C".
A : 894 (Installation hole pitch) * For removing tube forward
B : 730 (Installation hole pitch) * For removing the tube downward
C : 730 (Installation hole pitch)
Fig. 2-3
18
** More than 50 mm
More than
500 mm
Unit: mm
Side view
930
Side view
930
Side view
930