Panasonic U-4LE1E5 / U-4LE1E8 / U-5LE1E5 / U-5LE1E8 / U-6LE1E5 / U-6LE1E8 (serv.man2) Service Manual ▷ View online
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Design of Mini VRF SYSTEM
4. Installation Instructions
4-1. Selecting the Installation Site for Outdoor Unit
AVOID:
Hot air
Fig. 2-12
Fig. 2-13
Fig. 2-14
Fig. 2-15
Exhaust fan
Heat
source
source
Out-
door
unit
door
unit
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 and outside air
temperature does not exceed maximum 45°C constantly.
allow enough room around the unit for air intake/
exhaust and possible maintenance. (Figs. 2-13, 2-14, 2-15)
Installation space for outdoor unit
Install the outdoor unit with a sufficient space around the outdoor unit for operation and maintenance.
use lug bolts or equal to bolt down unit, reducing vibration
and noise.
(1) Obstructions on the left side, right side and rear
side (Front side and above the unit are opened).
(Fig. 2-13)
*
*
The outdoor units require necessary space to
unscrew on the rear side for maintenance and if a
sufficient maintenance space is provided on the
rear side (40 cm), the space of over 15 cm is enough
at the right side.
unscrew on the rear side for maintenance and if a
sufficient maintenance space is provided on the
rear side (40 cm), the space of over 15 cm is enough
at the right side.
*B
A
A
*B
C
15 cm
or more
25 cm
or more
20 cm
or more
(2) Obstructions on the front side and rear side (Left side,
right side and above the unit are opened). (Fig. 2-14)
For compressor replacement, 50 cm or more is
required on the front side even when using the
air discharge chamber.
required on the front side even when using the
air discharge chamber.
*A
B
C
*A
B
50 cm
or more
15 cm
or more
Obstructions on the front side and above the unit (Left
side, right side and rear side are opened). (Fig. 2-15)
(3)
B
A
A
B
50 cm
or more
30 cm
or more
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Design of Mini VRF SYSTEM
4. Installation Instructions
4-2. Air Discharge Chamber for Top Discharge
Be sure to install an air-discharge chamber in the field
when:
It is difficult to keep a space of min. 50 cm between
the air discharge outlet and an obstacle.
The air discharge outlet is facing a sidewalk and
discharged hot air may annoy passers-by.
Refer to Fig. 2-17.
4-3. Installing the Unit in Heavy Snow Areas
In locations with strong wind, snow-proof ducting
should be fitted and direct exposure to the wind
should be avoided as much as possible.
Countermeasures against snow and wind
In regions with snow and strong wind, the following
problems may occur when the outdoor unit is not
provided with a platform and snow-proof ducting:
a) The outdoor fan may not run and damage to the
unit may occur.
b) There may be no air flow.
c) The tubing may freeze and burst.
d) The condenser pressure may drop because of
strong wind, and the indoor unit may freeze.
4-4. Precautions for Installation in Heavy Snow
Areas
(1) The platform should be higher than the max. snow
depth. (Fig. 2-18)
(2) The 2 anchoring feet of the outdoor unit should
be used for the platform, and the platform should
be installed beneath the air intake side of outdoor
unit.
(3) The platform foundation must be firm and the unit
must be secured with anchor bolts.
(4) In case of installation on a roof subject to strong
wind, countermeasures must be taken to prevent
the unit from being blown over.
In case of multiple installations
Provide a solid base (concrete block, 10 × 40 cm beams
or equal), a minimum of 15 cm above ground level to
reduce humidity and protect the unit against possible
water damage and decreased service life. (Fig. 2-16)
Use lug bolts or equal to bolt down unit, reducing
vibration and noise.
Fig. 2-19
Fig. 2-18
In regions with significant snowfall, the outdoor unit should
be provided with a platform and snow-proof duct.
be provided with a platform and snow-proof duct.
Fig. 2-17
Fig. 2-16
Min. 15cm
Air intake
Air intake
Air discharge
Air discharge
Anchor bolts
(4 pieces)
(4 pieces)
Air discharge
Without snow-
proof ducting
(Low platform)
proof ducting
(Low platform)
With snow-proof
ducting
(High platform)
ducting
(High platform)
Unit: mm
Outdoor
Unit
Duct
Duct
Higher than the
maximum snow
depth
maximum snow
depth
Air intake
About 1/2 of the unit height
Platform (foundation)
Min.100 166
Duct
Outdoor Unit
Min. 100
308
Air discharge
Air intake
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Design of Mini VRF SYSTEM
4. Installation Instructions
4-5. Dimensions of Air-Discharge Chamber
1330
940
56
(316)
568
660
(110)
170
340
20
20
380
10
20
32
89
(88)
555
566
643
217
(303)
340
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3
4
1
5
6
7
8
5
6
4
8
3
1
2
7
9
25
25
9
550
518
518
550
568
568
CL
62.4
110
110
110
5
(106.3)
110
110
110
5.2
31
50
441.5
90
110
8-o4.5
1
Unit: mm
Unit: mm
In snowy regions, if there is concern that snow may enter the air discharge chamber, remove the base of the chamber before
using.
Reference diagram
Air
discharge
discharge
Air Intake
(Reverse side )
Air Intake
Air Intake
Air
discharge
discharge
(Reverse side )
hole
Installation anchoring holes (4-R6.5) / Anchor bolt M10
Reference diagram for air-discharge support (field supply)
Air discharge support
Downward, Left side installation fixture
T1.0
T1.0
T1.0
T1.0
T1.0
T1.0
T1.0
Downward, Right side installation fixture
Downward, Center side installation fixture
UPward, Left side installation fixture
UPward, Right side installation fixture
UPward, Left side installation fixture
UPward, Right side installation fixture
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Design of Mini VRF SYSTEM
4. Installation Instructions
7
15
3
18
90
90
224
518
34.5
579
45
562
9
18
87
27
11
33
23
21
15
3-
ø6
hole
ø
5
2
3-ø
6
ø5
7
15
3
18
90
90
224
518
579
45
562
9
18
87
34.5
8
25
15
11
33
23
21
32
3
Reference diagram for downward left side installation fixture (field supply)
Reference diagram for downward right side installation fixture (field supply)
Unit: mm
2-ø3.3 protrusion hole
(reverse side)
(reverse side)
hole
Unit: mm
2-ø3.3 protrusion hole
(reverse side)
(reverse side)
hole
hole
Cyclic bending
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