Panasonic Inverter Air Conditioner R410A Technical Data And Service Manual

							1-85
1. Specifications
6-12. Installing the Rear Panel on the Wall
Be sure to confirm that the wall is strong enough to suspend 
the unit.
See either Item a) or b) below depending on the wall type.
a)  If Wooden Wall
(1)  Attach the rear panel to the wall with the 10 screws pro-
vided. (Fig. 1-36)
If you are not able to line up the holes in the rear panel 
with the beam locations marked on the wall, use toggle 
bolts to go through the holes on the panel or drill 3/16
dia. holes in the panel over the stud locations and then 
mount the rear panel.
(2)  Double-check with a ruler or level gauge that the panel is 
level. This is important to install the unit properly.
(Fig. 1-37)
(3)  Make sure the panel is flush against the wall. Any space 
between the wall and unit will cause noise and vibration.
b) If Block, Brick, Concrete or Similar Type Wall
Make 3/16 dia. holes in the wall. Insert rawl plugs for appropri-
ate mounting screws. (Fig. 1-38)
3/16dia. hole 1-3/16
 or more
Rawl plug
(Field supply)
Fig. 1-38
Fig. 1-37 Fig. 1-36
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							1-86
1. Specifications
6-13. Removing the Grille to Install the Indoor Unit
Basically, these models can be installed and wired 
without removing the grille. If access to any internal 
part is needed, follow the steps given below:
How to remove the grille
(1)  Set the 2 flaps in the horizontal position.
(2)  Unscrew the 3 screws. (Fig. 1-39a)
(3)  Remove the grille.
(a)  Hold both corners of the air-intake grille, then 
pull out and up to open. (Fig. 1-39b)
(b)  Use a flathead screwdriver to push up the 3 
tabs to remove the grille. (Fig. 1-39b)
(c)  Pull the lower part of the grille toward you to 
remove. (Fig. 1-39a)
How to replace the grille
(1)  Close the flaps.
(2)  Reinstall the grille into the lower part while align-
ing its tabs on the upper part. (Fig. 1-40a) Insert 
the tabs in the slots and push the lower part of the 
grille back into position.
(3)  Press at each of the 5 tabs to completely close the 
grille. Make sure that the grille and frame are firmly 
fitted together. (Fig. 1-40b)
6-14. Preparing the Indoor Side Tubing
Arrangement of tubing by directions
(a) Right tubing
The corner of the right frame needs to be cut by a 
hacksaw or the like. (Fig. 1-41)
(b)  Right-rear or left-rear tubing
In this case, the corner of the frame needs not be 
cut.
To mount the indoor unit on the rear panel:
(a)  Hang the 3 mounting slots of the unit on the upper 
tabs of the rear panel. (Fig. 1-42)
Air-intake grille
Grille
Fig. 1-39a
Air-intake grille
Fig. 1-39b
Fig. 1-40a
Fig. 1-40b
Frame
Right tubing
outlet
Fig. 1-41
Ta bMounting slot
Fig. 1-42
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							1-87
1. Specifications
6-15. Wiring Instructions
General Precautions on Wiring
(1)  Before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry out the wiring closely 
following the wiring diagram.
(2)  Provide a power outlet to be used exclusively for each unit. A power supply disconnect and circuit breaker for 
overcurrent protection should be provided in the exclusive line.
(3)  To prevent possible hazards from insulation failure, the unit must be grounded.
(4)  All wiring must be connected tightly.
(5)  Do not allow wiring to touch refrigerant tubing, compressor, or any moving parts of the fan.
Unauthorized changes in the internal wiring can be very dangerous. The manufacturer will 
accept no responsibility for any damage or misoperation that occurs as a result of such 
unauthorized changes.
6-16. Wiring Instructions for Inter-Unit Connections
(1)  Insert the inter-unit wiring (according to local 
electrical codes) into the through-the-wall PVC 
pipe. Run the wiring toward the indoor side allowing 
approx. 10 inches to extend from the wall face. 
(Fig. 1-43)
(2)  Route the inter-unit wiring from the back of the 
indoor unit and pull it toward the front for 
connection. (Figs. 1-44a and 1-44b)
(3)  Connect the inter-unit wiring to the corresponding 
terminals on the terminal plate (Figs. 1-44a and 
1-44b) while referring to the wiring diagram.
(4)  Be sure to secure the wiring with the provided 
clamp.
How to remove the cover plate
To access the terminal plate inside the indoor unit, 
follow these steps.
(1)  Using a Phillips head screwdriver, remove the 
screw on the cover plate. (Figs. 1-44a and 1-44b)
(2)  Remove the cover plate.Rear
panel
WiringWall
10 in.
Plastic
cover
Fig. 1-43
Terminal
plate
Cover plate
Fig. 1-44a
Clamping
strap
Remote control wiring 
and Inter-unit control 
wiring (field supplied)Earth screw
Conduit
(field supplied)
Connection for Solenoid 
Vale Kit  (for 3WAY)
Power wiring 
(field supplied)
Fig. 1-44b
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							1-88
1. Specifications
6-17. Shaping the Tubing
(1)  Shape the refrigerant tubing so that it can easily go 
into the hole. (Fig. 1-45)
(2)  Push the wiring, refrigerant tubing and drain hose 
through the hole in the wall. Adjust the indoor unit 
so it is securely seated on the wall fixture.
(3)  Carefully bend the tubing (if necessary) to run along 
the wall in the direction of the outdoor unit and then 
insulate to the end of the fittings. The drain hose 
should come straight down the wall to a point where 
water runoff will not stain the wall.
(4)  Connect the refrigerant tubing to the outdoor 
unit.(After performing a leak test on the connection, 
insulate it with insulating tape. (Fig. 1-46)) 
(5)  Assemble the refrigerant tubing, drain hose and 
inter-unit wiring as shown in Fig. 1-47.
6-18. Installing the Drain Hose
(1)  The drain hose should be slanted downward on the 
outdoor side. (Fig. 1-48)
(2)  Never form a trap in the course of the hose.
(3)  If the drain hose will run in the room, insulate* the 
hose so that chilled condensation will not damage 
furniture or floors. (Fig. 1-49)
  *  Foamed polyethylene or its equivalent is 
recommended.Cover
Refrigerant
tubing
Inter-unit
wiring
Drain hose
Fig. 1-45
Insulating
tape
Fig. 1-46
Refrigerant tubing
Inter-unit wiring
Drain hose
Fig. 1-47
WARNING
Do not supply power to the unit 
or operate it until all tubing and 
wiring to the outdoor unit are 
completed.
Drain
hose Slant
Indoor
unit
Fig. 1-48
Condensation
Insulation material
(field supply)
must be used.
Fig. 1-49
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							1-89
1. Specifications
Ceiling Type  (T1 Type)
6-19. Suspending the Indoor Unit
(1)  Place the full-scale diagram (supplied) on the 
ceiling at the spot where you want to install the 
indoor unit. Use a pencil to mark the drill holes.
(Fig. 1-50).
NOTE
Since the diagram is made of paper, it may shrink or 
stretch slightly because of high temperature or 
humidity. For this reason, before drilling the holes 
maintain the correct dimensions between the markings.
(2)  Drill holes at the 4 points indicated on the full-scale 
diagram.
(3)  Depending on the ceiling type:
(a)  Insert suspension bolts as shown in Fig. 1-51.
 or
(b)  Use existing ceiling supports or construct a 
suitable support as shown in Fig. 1-52.
WARNING
It is important that you use 
extreme care in supporting the 
indoor unit from the ceiling. 
Ensure that the ceiling is 
sufficiently strong enough to 
support the weight of the unit. 
Before hanging the ceiling 
unit, test the strength of each 
attached suspension bolt.
(4)  Screw in the suspension bolts, allowing them to 
protrude from the ceiling as shown in Fig. 1-52. 
The distance of each exposed bolt must be of 
equal length within 2 inches. (Fig. 1-53)
Rear
Full-scale diagram
Frontface
Fig. 1-50
Hole-in-anchor
Hole-in-plug
Concrete Insert
Suspension bolt (M10 or 3/8)
(field supply)
Fig. 1-51
Ceiling tiles
Ceiling support
A
A
Fig. 1-52
unit
Ceiling
surface
Fixture. n i 2 n
i h t i W
Fig. 1-53
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							1-90
1. Specifications
(5)  Before suspending the indoor unit, remove the 2 
screws on the latch of the air-intake grilles, open 
the grilles, and remove them by pushing the claws 
of the hinges as shown in Fig. 1-54. Then remove 
both side panels sliding them along the unit toward 
the front after removing the two screws which fix 
them. (Fig. 1-55)
(6)  Preparation for suspending the indoor unit. The 
suspension method varies depending on whether 
the unit is next to the ceiling or not. 
(Figs. 1-56 and 1-57)
e d i l S
Hinge
Air-intake grille
Pull out the
air-Intake grille
pushing claws
of the hinges
Screw
Latch
Fig. 1-54
Slide toward
front side
Side panel
Fig. 1-55
unitSuspension bolt
(field supply)
Ceiling surface
Washer (supplied)
Double nut
(field supply) Fixture
Fig. 1-56
unitSuspension bolt
(field supply)
Washer (supplied)
Washer (field supply)
Double nut
(field supply)
Fig. 1-57
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							1-91
1. Specifications
Ceiling
surface
.
x o r p
p A
h
c n
i 1
Suspension bolt
Washer
(supplied)Nut
(field supply)
Fig. 1-58
Fig. 1-59
Fig. 1-60
(7)  Suspend the indoor unit as follows.
(a)  Mount a washer and two hexagonal nuts on 
each suspension bolt as shown in Fig. 1-58.
(b)  Lift the indoor unit with a lifting machine to the 
ceiling surface, and place it on the washers 
through the notches, to fix it in place.
(Fig. 1-59)
(c)  Tighten the two hexagonal nuts on each 
suspension bolt to suspend the indoor unit as 
shown in Fig. 1-60.
NOTE
A ceiling surface is not always level. Please confirm 
that the indoor unit is evenly suspended. For the instal-
lation to be correct, leave a clearance of about 3/8 
between the ceiling panel and the ceiling surface and 
fill the gap with an appropriate insulation or filler 
material.
(8)  If the tubing and wiring are to go towards the rear 
of the unit, make holes in the wall. (Fig. 1-61)
(9)  Measure the thickness of the wall from the inside 
to the outside and cut PVC pipe at a slight angle to 
fit. Insert the PVC pipe in the wall. (Fig. 1-62)
Indoor
sideOutdoor
side
Fig. 1-61
Cut at slight angle PVC pipe (field supply)
INSIDE
Wall
Slight
angle PVC pipe OUTSIDE
Fig. 1-62
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							1-92
1. Specifications
6-20. Duct for Fresh Air
There is a duct connection port (knock-out hole) at the 
right-rear on the panel top of the indoor unit for drawing 
in fresh air. If it is necessary to draw in fresh air, remove 
the cover by knocking it out and connect the duct to the 
indoor unit through the connection port. (Fig. 1-63)
If connection at the right-rear on the panel top is not 
appropriate, another duct connection port can be made 
by cutting an opening on the left side of the rear panel of 
the indoor unit as shown in Fig. 1-64.
6-21. Installing the Drain Piping
  Prepare a standard PVC pipe for the drain and 
connect it to the indoor unit drain pipe with the 
supplied hose clamps to prevent water leaks.
  Connect the drain piping so that it slopes downward 
from the unit to the outside. (Fig. 1-65)
  Never allow traps to occur in the course of the piping.
  Insulate any piping inside the room to prevent 
dripping.
  Use the supplied drain pipe to connect the drain pipe 
with the drain outlet of the indoor unit.
  After connecting the drain pipe securely, wrap the 
supplied drain pipe insulator around the pipe, seal 
the gap at the drain socket with the supplied black 
insulation tape, then secure it with clamps. 
(Fig. 1-66)
  After the drain piping, pour water into the drain pan to 
check that the water drains smoothly.
CAUTION
Check local electrical codes 
and regulations before 
obtaining wire. Also, check any 
specified instruction or 
limitations.
Duct connection port
(Knock-out hole)
Panel Top
Fig. 1-63
Cut this portion 
A
B 4-11/32
3-15/16
Rear side  Right side 
A   2 3 / 3 - 7    6 1 / 5 1 - 3
   2 3 / 1 3 - 1    8 / 3 - 1
S-36PT1U6, S-42PT1U6 S-26PT1U6
B
Fig. 1-64
GoodMin. 1/100
Not good
Fig. 1-65
Drain hose
(supplied) Packing
Side
softened
(supplied)Drain hose
adapter
(supplied) Drain pipe
Indoor
unitclamp
(supplied)Hard PVC pipe
(not supplied)
Adhere with 
PVC adhesive.
Fig. 1-66
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							1-93
1. Specifications
Low Silhouette Ducted Type (F1 Type)
6-22. Required Minimum Space for Installation and 
Service
  This air conditioner is usually installed above the 
ceiling so that the indoor unit and ducts are not 
visible. Only the air intake and air outlet ports are 
visible from below.
  The minimum space for installation and service is 
shown in Fig. 1-67 and Table 1-7.
  It is recommended that space be provided (17-23/32
×17-23/32) for checking and servicing the 
electrical system.
  Fig. 1-68 and Table 1-8 show the detailed 
dimensions of the indoor unit.
Table 1-7
Unit: inch (mm)
6 3   6 2   e p y T  
 A (Length) 42-17/32 (1,080)  61-13/32 (1,560)
Number of duct flanges4   3  
A B C D E F G H I J K
 35-7/16          9-21/32   S-26PF1U637-7/8
 (7-3/32×5) 39-3/8 42-17/32 11-13/32 2-23/32 38-19/32 39-31/32 5-1/8
 (9-21/32×1) 9-27/32 12  16
 54-11/32          19-9/32   
S-36PF1U656-25/32
 (9-1/16×6) 58-9/32 61-13/32  13-3/16  12-7/32 57-15/32 58-27/32 5-1/8
 (9-21/32×2) 9-7/16 16 18
No. of
holesDimension
Table 1-8Unit: inch (mm)
Refrigerant tubing joint (liquid tube) 
Refrigerant tubing joint (gas tube) 
Upper drain port (O.D. 1-1/4 in.) 
Bottom drain port (O.D. 1-1/32 in.) 
Suspension lug 
Power supply outlet (2-ø1-3/16 hole) 
Fresh air intake port (ø5-29/32 hole) 
Flange for the flexible air outlet duct (ø7-7/8 hole)
Tube cover
Electrical component box 
Flange for the air intake duct 
(Option or field supply) 
9
10
9
10
11
11
(Suspension bolt pitch) 
)
h c t
i p t
l o b n
o i
s n e p s u S
(
M-ø1/8
(Hole) 4-ø15/32
(Hole) (Hole)
A (O.D.)  L-ø1/4
I 13/3213/32
2 3
/ 3 12 3 / 5 - 2 8 / 7
- 7
2 3 / 5
- 2
2 3 / 3 1
I J JK 
B
C
  ) 2 3 / 9 2 - 5 ( D
1-9/16
E E E F 2-15/16 
2-9/1611-7/322-3/45-1/8
31/32 8-9/32 12-7/32
31/32
6-7/8
1-3/8 3-17/321-7/32 1-7/32H (Duct suspension bolt pitch) 
G (Ceiling opening dimension) 
2 3
/ 1 3
6
1 / 5
1 -
3 2 3
/ 9 -
7
2 3
/ 7 2 -
2 2 2
3 / 1 3
2 3
/ 7 1
- 4
2
3 /
5
1 -
7 2 3 / 1 1 -
3
2
3 /
1 3
6 1 /
3 - 1 4
/ 3 - 26
1 /
5 - 6
2
3 / 1
3 6
1 / 3
1 - 4 2
2 3 /
3 12 3 / 5 1
- 3 6
1 / 3
1 -
0 1) n o
i s n
e m i d
g n
i n e p o g n i
l
i e C (4 / 1 - 0 1
) . D . O (
3/4 3/4
Inspection access 
(17-23/32
×
17-23/32)
(Field supply) 
Inspection access panel 
Ceiling
Indoor UnitInspection
access
17-23/32
×
17-23/32
Air outlet duct flange min.
9-27/32
. n i m
4 / 3
- 5 1min. 25-19/32
2 3 / 7 2 - 2 2
A (Suspension bolt pitch)Electrical
component box
Refrigerant
tubing
Unit: inch
. n i m
2
3 / 7 2 -
9
Fig. 1-67
Fig. 1-68L
M
Unit: inch
Type
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							1-94
1. Specifications
6-23. Suspending the Indoor Unit
Depending on the ceiling type:
 Insert suspension bolts as shown in Fig. 1-69
 or
 Use existing ceiling supports or construct a suitable 
  support as shown in Fig. 1-70.
(1)  When placing the unit inside the ceiling, 
determine the pitch of the suspension bolts 
referring to the dimensional data on the previous 
page. (Fig. 1-68)
Tubing must be laid and connected inside the 
ceiling when suspending the unit. If the ceiling is 
already constructed, lay the tubing into position for 
connection to the unit before placing the unit inside 
the ceiling.
(2)  Screw in the suspension bolts allowing them to 
protrude from the ceiling as shown in Fig. 1-69. 
(Cut the ceiling material, if necessary.)
(3)  Thread the 2 hexagonal nuts and washers (field 
supply) onto the 4 suspension bolts as shown in 
Figs. 1-71 and 1-72. Use 2 sets of nuts and wash-
ers (upper and lower), so that the unit will not fall 
off the suspension lugs.
WARNINGIt is important that you use 
extreme care in supporting the 
indoor unit inside the ceiling. 
Ensure that the ceiling is strong 
enough to support the weight 
of the unit. Before hanging the 
unit, test the strength of each 
attached suspension bolt.
Hole-in-anchor
Hole-in-plug
Concrete Insert
Suspension bolt (M10 or 3/8)
(field supply)
Fig. 1-69
Ceiling tiles
Ceiling support
Fig. 1-70
Nuts and washers
(2 sets)Suspension bolt
Suspension lug
Upper
Lower
Fig. 1-71
Suspension bolt
Hexagonal nut
Fig. 1-72
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