Panasonic Inverter Air Conditioner R410A Technical Data And Service Manual

							1-65
1. Specifications
3. SELECTING THE INSTALLATION SITE
3-1. Outdoor Unit
AVOID:
 
heat sources, exhaust fans, etc. (Fig. 1-3)
 
damp, humid or uneven locations
DO:
choose a place as cool as possible.
 
choose a place that is well ventilated and outside
air temperature does not exceed maximum 115°F 
constantly.
allow enough room around the unit for air intake/ 
exhaust and possible maintenance. (Fig. 1-4)
 
use lug bolts or equal to bolt down unit, reducing 
vibration and noise.
if cooling operation is to be used when the outdoor air 
temperature is 23°F or below, install a duct on
the outdoor unit.
Installation space
Distance between obstructions and the unit air inlet
and outlet must be as shown below.
Installation requirements
provide a solid base (concrete block, 4×16
beams or equal), a minimum of 6 above ground
level to reduce humidity and protect the unit against
possible water damage and decreased service life.
(Fig. 1-6)
use lug bolts or equal to bolt down unit, reducing 
vibration and noise.Fig. 1-5
Out-
door
unitHeat source Hot airExhaust fan
*4 *2*3
*1
More than 1/2
More than
3.3 ft.More than 1/2 Inlet side C
Outlet side
*1Inlet side 
More than 8
(field supply)
AB
(Ground)
Air direction chamber(Obstruction above unit)
(Obstruction on 
inlet side)
Anchor bolts
(4 pieces)
Fig. 1-4Fig. 1-3
Fig. 1-6
CAUTION
Concerning inlet-side distance “C” (Fig. 1-4)
The minimum for distance “C” is 6 if there are no obstructions on the outlet side
(wall *1 side) and *2 or *4 is not present. In all other cases, the minimum for distance
“C” is 8.
 
If the unit is installed with the outlet side facing wall *1, then there must be no obstructions
on 2 of the remaining 3 sides: *2, *3, *4.
If wall *1 is on the outlet side (Fig. 1-4), or if obstructions are present on all 3 sides *2,
*3, and *4 (Fig. 1-4), then the minimum distance for “A” and “B” is 80 (Fig. 1-5). Even
if there is no wall on the outlet side, a minimum of 3.3 ft. is required.
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							1-66
1. Specifications
3-2. 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. 20 between
the air discharge outlet and an obstacle.
 
the air discharge outlet is facing a sidewalk and
discharged hot air may bother passers-by.
Refer to Fig. 1-7.
3-3. 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)
unit may occur.
b)
c)
d)The outdoor fan may not run and damage to the
There may be no air flow.
The tubing may freeze and burst.
The condenser pressure may drop because of
strong wind, and the indoor unit may freeze.
3-4. Precautions for Installation in Heavy Snow Areas
(1)
depth. (Fig. 1-8)
(2)
used for the platform, and the platform should be
installed beneath the air intake side of outdoor unit.
(3)
must be secured with anchor bolts.
(4)The platform should be higher than the max. snow
The 2 anchoring feet of the outdoor unit should be
The platform foundation must be firm and the unit
In case of installation on a roof subject to strong
wind, countermeasures must be taken to prevent
the unit from being blown over.Fig. 1-7
Fig. 1-8
Fig. 1-9
In regions with significant snowfall, the outdoor unit should
be provided with a platform and snow-proof duct.
Air discharge
Air discharge
Without snow-
proof ducting
(Low platform)With snow-
proof ducting
(High platform)
Outdoor
Duct
Air Unit
Intake
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							1-67
1. Specifications
3-5. Dimensions of Wind Ducting
Reference diagram for air-discharge chamber ( eld supply)
For U-26PE(S)1U6 / U-36PE(S)1U6 unit
ƒAir discharge chamber
„Air discharge chamber (base)
For U-42PE(S)1U6 unit
ƒUnit front, air discharge chamber
„Unit left side, air discharge chamber
…Unit right side, air discharge chamber
†Reinforcement brackets, 4 locations
Note: In snowy regions, if there is concern that snow may enter the air discharge










chamber, remove the base of the chamber (10 screws) before using.
1
2(25/32)(25/32) (25/32)
(25/32)21-13/16
9-7/8
22-7/16
23-15/32
1-1/165-5/32
5-3/16
9-27/32 9-27/32
21-13/1615/16 17/32
21-39/64
2
Rectangular hole
 (both sides)
6-ø15/64 hole
3-ø5/32 hole
Unit: inch
9-7/16 1-1/8
1-1/8
1-3/8
21-5/32 12-15/32
2-3/4
Rectangular
holeRectangular
hole
Rectangular
holeRectangular
hole
11-13/162
143
9-7/161-3/8 12-15/32 21-5/32
2-3/4
21-13/32 1 122-13/32
42-29/3239-1/49-27/32
9-27/32
12-7/32
9-27/32
Unit: inch
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							1-68
1. Specifications
Dimensions of Outdoor Unit with air-discharge chamber ( eld supply)
U-26PE(S)1U6 / U-36PE(S)1U6 unit
U-42PE(S)1U6 unit
13-3/8
2-17/32
21-13/161/2 6-11/16
25-31/324-5/16
2 / 1 2 / 1
14-31/32
15-15/16 19/322
3 / 5 2 2 3 / 5 2
13/32
Wind direction
Wind
direction
Wind direction
Wind direction
Wind direction
37
30-23/32
23/32
9-7/8
21-5/8 4-1/16
5-3/16
Wind direction
Unit: inch
4-5/16
25-31/32 6-11/16
1/2 1/2
13-3/8
15-15/16 14-31/32 13/32 19/3225/32 25/32
1/2
2-11/36 21-13/32
11 - 1 3 / 1 6
Wind
direction
Wind direction
37
23/3248-7/16
Wind
direction Wind
directionWind
direction Wind
direction
11-13/16
4-1/4 39-1/4Wind direction
Wind direction
Unit: inch
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							1-69
1. Specifications
Reference diagram for air-discharge chamber ( eld supply)
U-26PE(S)1U6 / U-36PE(S)1U6 / U-42PE(S)1U6
Required space around outdoor unit
If the air discharge chamber is used, the space shown below must be secured around the outdoor unit.
If the unit is used without the required space, a protective device may activate, preventing the unit from operating.
(1) Single-unit installation
(2) Multiple-unit installation
   Installation in lateral rows
   Installation in front-rear rows
CAUTIONThe top and both sides must remain open. If there are obstacles to the front and rear of
the outdoor unit, the obstacle at either the front or rear must be no taller than the height of
the outdoor unit.
CAUTIONThe front and top must remain open.
The obstacles must be no taller than the height of the outdoor unit.
CAUTIONThe front and both sides must remain open.
Min. 39-3/8
Min. 7-7/8
Unit: inch
More than 15-3/4
6 1 / 3 1 - 1 1 n a h t e r o M 6 1 / 3 1 - 1 1 n a h t e r o M
More than 7-7/8
Unit: inch
Installation with intakes facing outlets Installation with intakes facing
intakes or outlets facing outlets
More than 78-3/4 More than 15-3/4
More than 59-1/16
Unit: inch
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							1-70
1. Specifications
3-6. Dimensions of Snow Ducting
Reference diagram for snow-proof vents ( eld supply)
For U-26PE(S)1U6 / U-36PE(S)1U6 unit
ƒUnit top, snow-proof vent
„Unit left side
…Unit right side
†Unit reverse side
‡Unit reverse side
ˆUnit sides, reinforcement brackets for snow-proof vent
For U-42PE(S)1U6 unit
ƒUnit top, snow-proof vent
„Unit left side
…Unit right side
†Unit reverse side
‡Unit reverse side
ˆUnit sides, reinforcement brackets for snow-proof vent
25-13/32
17-15/32
9-3/16 16-25/32 27-29/32
3-31/3211-29/32
16-25/329-3/16
27-29/32
30-3/32
1
4
56
2
1-21/32
25/325-3/32
19-11/16
9-3/8
30-11/1628-3/4 19-11/16
5/8
13-25/32
3-3/4
Fastened by screws at 13 locations
Fastened by screws at 3 locations 
(also on reverse side)
Fastened by screw at 1 
location (also on reverse side)Unit anchor hole 
(6 – ø7 hole)
Unit: inch
17-15/32 25-13/32
9-3/16 28-13/16
15-9/32
47-19/32
2 311-7/8
3-31/32
9-3/16
28-13/16
1-13/16
47-19/32
30-3/32
1
4
5-29/32
17-23/32 19-11/16
25-32
13-5/16
19-11/16
1-5/8 28-3/4
30-5/85/8 3-3/4 19-11/16
Fastened by screws at 13 locations
Fastened by screws at 
3 locations (also on reverse side)
Fastened by screw at 
1 location (also on reverse side)
Unit anchor hole 
(7 – ø7
 hole)
Unit: inch
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							1-71
1. Specifications
Dimensions of outdoor unit with snow-proof vents ( eld supply)
U-26PE(S)1U6 / U-36PE(S)1U6 unit
U-42PE(S)1U6 unit
11-57/64
16-47/6415-15/16 14-61/64 25/64 19/3225/32
30-5/64
25-25/64
7-3/64
3/4 30-45/64
37-1/64 Wind direction
Wind direction Wind direction
Wind direction
Wind direction
Wind direction
Unit: inch
11-57/64
28-13/16
Wind direction
Wind direction
Wind direction
Wind direction
Wind direction Wind direction
48-27/64
47-19/32
37-1/64
24-7/8
15-15/1614-61/64 25/64 19/3225/32 25/32
30-5/64
25-25/64
7-3/64
Unit: inch
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							1-72
1. Specifications
Reference diagram for snow-proof vents – 1
Space requirements for setting – (1)
U-26PE(S)1U6 / U-36PE(S)1U6 / U-42PE(S)1U6
] t i n u   f o   t n o r f   e h t   o t   e l c a t s b O [ ] t i n u   f o   r a e r   e h t   o t   e l c a t s b O [
: n e p o   s i   p o T     : n e p o   s i   p o T  
 Top is blocked by an obstacle:
Top is blocked by an obstacle:
Unit: inch
Min. C
Min. E
Min. FMin. E Min. EMin. B
Min. A
Min. D Min. G
(1) Single-unit installation
(3) Multiple-unit installation (2 or more units)
Note:
In cases 2 and 3 the 
height of the obstacle 
must be no taller than 
the height of the 
outdoor unit. (2) Obstacles on both sides
A
B
C
D
E
F
G5-29/32
5-29/32
11-13/16
7-7/8
11-13/16
5-29/32
7-7/8
Min. I Min. I
Min. H
Min. J
(1) Single-unit installation
(2) Multiple-unit installation (2 or more units)
H
19-11/16I
11-13/16J
39-3/8
Min. L
Min. K
L
19-11/16K
5-29/32
Min. MMin. N
M
39-3/8N
39-3/8
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							1-73
1. Specifications
Reference diagram for snow-proof vents – 2
Space requirements for setting – (2)
U-26PE(S)1U6 / U-36PE(S)1U6 / U-42PE(S)1U6
[Obstacles to the front and rear of unit]
 The top and both sides must remain open. Either the obstacle to the front or
    the obstacle to the rear must be no taller than the height of the outdoor unit.
[Installation in front-rear rows]
   The top and both sides must remain open. Either the obstacle to the front or the obstacle
    to the rear must be no taller than the height of the outdoor unit.
Unit: inch
Min. 11-13/36Min. 11-13/16
Min. 39-
3/8
Min
. 7-7/8
Q
Q Min
. P Min. O
 (1) Single-unit installation
(2) Obstacles on both sidesDimension Q
If a snow protection duct is attached after the unit is
installed, verify that dimension Q is 19-11/16 in. or more.
O
39-3/8P
5-29/32
Min. 11-13/16
Min. 39-3/8Min. 7-7/8
Min. 59-1/16 Min. 78-3/4Q
Dimension Q
If a snow protection duct is
attached after the unit is
installed, verify that dimension
Q is 19-11/16 in. or more.
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							1-74
1. Specifications
4. HOW TO INSTALL THE OUTDOOR UNIT
4-1. Installing the Outdoor Unit
 Use concrete or a similar material to create the base, 
and ensure good drainage.
 Ordinarily, ensure a base height of 2. or more. If a 
drain pipe is used, or for use in cold-weather regions, 
ensure a height of 6. or more at the feet on both sides 
of the unit. (In this case, leave clearance below the unit 
for the drain pipe, and to prevent freezing of drainage 
water in cold-weather regions.)
 Refer to the Fig. 1-10 for the anchor bolt dimensions.
 Be sure to anchor the feet with the anchor bolts (M10). 
In addition, use anchoring washers on the top side. (Use 
large square 32×32 SUS washers with diameters of 
10.) (Field supply)
4-2. Drainage Work
Follow the procedure below to ensure adequate draining 
for the outdoor unit.
 For the drain port dimensions, refer to the  gure at 
right.
   Ensure a base height of 6 in. or more at the feet on 
both sides of the unit.
4-3. Routing the Tubing and Wiring
 The tubing and wiring can be extended out in 4 
directions: front, rear, right, and down.
   The service valves are housed inside the unit. To 
access them, remove the inspection panel. (To remove 
the inspection panel, remove the 3 screws, then slide 
the panel downward and pull it toward you.)
(1) If the routing direction is through the front, rear, 
or right, use a nipper or similar tool to cut out the 
knockout holes for the inter-unit control wiring outlet, 
power wiring outlet, and tubing outlet from the 
appropriate covers A and B.
(2) If the routing direction is down, use a nipper or similar 
tool to cut out the lower  ange from cover A.
CAUTION
 Route the tubing so that it does 
not contact the compressor, 
panel, or other parts inside the 
unit. Increased noise will result if 
the tubing contacts these parts.
   When routing the tubing, use a 
tube bender to bend the tubes.Fig. 1-10
Fig. 1-11
37-1/64
11-21/32
5-29/32 8-5/8
33/64 33/64
25/3225/32
19/3225/64 14-61/64
15-15/1613-25/64
33/64 33/64 6-11/16
4-21/64
25-63/64
Drain port (2 locations)
Drain port Anchor bolt (M10)
Unit: inch
Inter-unit control wiring outlet
Inspection panel
Cover ACover B
Power wiring outlet
Tubing outlet Down FrontRear
Right
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