Panasonic s-26pt2u6, s-36pt2u6, s-42pt2u6 installation

INSTALLATION INSTRUCTIONS

Air Conditioner

This air conditioner uses the refrigerant R410A.

Model No.

Indoor Units

Type Indoor Unit Type

26 36 42

T2 Ceiling S-26PT2U6 S-36PT2U6 S-42PT2U6

Read through the Installation Instructions before you proceed with the installation.
In particular, you will need to read under the “IMPORTANT!” section at the top of the page.

Nominal Capacity

F616837

IMPORTANT!
Please Read Before Starting

This air conditioning system meets strict safety and
operating standards. As the installer or service person, it is
an important part of your job to install or service the

system so it operates safely and efficiently.

For safe installation and trouble-free operation, you
must:

● Carefully read this instruction booklet before beginning.

● Follow each installation or repair step exactly as shown.

● This air conditioner shall be installed in accordance with

National Wiring Regulations.

● Pay close attention to all warning and caution notices
given in this manual.

This symbol refers to a hazard or

WARNING

CAUTION

If Necessary, Get Help

These instructions are all you need for most installation
sites and maintenance conditions. If you require help for a
special problem, contact our sales/service outlet or your
certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for
improper installation or maintenance service, including

failure to follow the instructions in this document.

SPECIAL PRECAUTIONS

WARNING

ELECTRICAL SHOCK CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH.
ONLY A QUALIFIED, EXPERIENCED
ELECTRICIAN SHOULD ATTEMPT TO
WIRE THIS SYSTEM.

• Do not supply power to the unit until all wiring and tubing

are completed or reconnected and checked.

• Highly dangerous electrical voltages are used in this system.

Carefully refer to the wiring diagram and these instructions
when wiring. Improper connections and inadequate
grounding can cause accidental injury or death.

• Ground the unit following local electrical codes.

• Connect all wiring tightly. Loose wiring may cause over-

heating at connection points and a possible fire hazard.

• To prevent possible hazards from insulation failure,

the unit must be grounded.

• This equipment is strongly recommended to be installed

with Earth Leakage Circuit Breaker (ELCB) or Residual
Current Device (RCD). Otherwise, it may cause electrical
shock and fire in case of equipment breakdown or

insulation breakdown.

unsafe practice which can result
in severe personal injury or death.

This symbol refers to a hazard or
unsafe practice which can result
in personal injury or product or
property damage.

When Wiring

When Transporting

Be careful when picking up and moving the indoor and
outdoor units. Get a partner to help, and bend your knees
when lifting to reduce strain on your back. Sharp edges or
thin aluminum fins on the air conditioner can cut your
fingers.

When Installing…

Select an installation location which is rigid and strong
enough to support or hold the unit, and select a location for
easy maintenance.

…In a Room

Properly insulate any tubing run inside a room to prevent
“sweating” that can cause dripping and water damage to
walls and floors.

Keep the fire alarm and the air

CAUTION

…In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a
solid, level foundation for the outdoor unit. This prevents

water damage and abnormal vibration.

…In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a
metal frame. Provide a suitable air baffle.

…In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher
than drifting snow. Provide snow vents.

outlet at least 5 feet (1.5 m) away
from the unit.

When Connecting Refrigerant Tubing

• Pay particular attention to refrigerant leakages.

• Ventilate the room immediately, in the event that is
refrigerant gas leaks during the installation. Be careful not
to allow contact of the refrigerant gas with a flame as this
will cause the generation of toxic gas.

• Keep all tubing runs as short as possible.

• Apply refrigerant lubricant to the matching surfaces of the
flare and union tubes before connecting them, then tighten
the nut with a torque wrench for a leak-free connection.

• Check carefully for leaks before starting the test run.

WARNING

• When performing piping work, do not mix air
except for specified refrigerant (R410A) in
refrigeration cycle. It causes capacity down, and
risk of explosion and injury due to high tension

inside the refrigerant cycle.

• If the refrigerant comes in contact with a flame,
it produces a toxic gas.

• Do not add or replace refrigerant other than
specified type. It may cause product damage,
burst and injury, etc.

2

• Do not leak refrigerant while piping work for an
installation or re-installation, and while repairing
refrigeration parts.
Handle liquid refrigerant carefully as it may cause

frostbite.

When Servicing

• Turn the power OFF at the main power box (mains)
before opening the unit to check or repair electrical
parts and wiring.

• Keep your fingers and clothing away from any moving
parts.

• Clean up the site after you finish, remembering to
check that no metal scraps or bits of wiring have been
left inside the unit.

CAUTION

• Do not touch the air inlet or the sharp
aluminum fins of the outdoor unit. You
may get injured.

• Ventilate any enclosed areas when installing or
testing the refrigeration system. Leaked
refrigerant gas, on contact with fire or heat, can
produce dangerously toxic gas.

• Confirm after installation that no refrigerant gas
is leaking. If the gas comes in contact with a
burning stove, gas water heater, electric room
heater or other heat source, it can cause the
generation of toxic gas.

WARNING

• This product must not be modified or
disassembled under any circumstances.
Modified or disassembled unit may cause fire,
electric shock or injury.

• Do not clean inside the indoor and outdoor
units by users. Engage authorized dealer or
specialist for cleaning.

• In case of malfunction of this appliance, do
not repair by yourself. Contact to the sales
dealer or service dealer for a repair.

Check of Density Limit

The room in which the air conditioner is to be
installed requires a design that in the event of
refrigerant gas leaking out, its density will not exceed
a set limit.

The refrigerant (R410A), which is used in the air
conditioner, is safe, without the toxicity or combustibility of
ammonia, and is not restricted by laws imposed to protect
the ozone layer. However, since it contains more than air,
it poses the risk of suffocation if its density should rise
excessively. Suffocation from leakage of refrigerant is
almost non-existent. With the recent increase in the
number of high density buildings, however, the installation
of multi air conditioner systems is on the increase
because of the need for effective use of floor space,
individual control, energy conservation by curtailing heat
and carrying power, etc.
Most importantly, the multi air conditioner system is able
to replenish a large amount of refrigerant compared to
conventional individual air conditioners.

Others

WARNING

• Do not sit or step on the unit, you may
fall down accidentally.

CAUTION

• Do not touch the air inlet or the sharp
aluminum fins of the outdoor unit.
You may get injured.

• Do not stick any object into the FAN
CASE.
You may be injured and the unit may
be damaged.

If a single unit of the multi air conditioner system is to be
installed in a small room, select a suitable model and
installation procedure so that if the refrigerant
accidentally leaks out, its density does not reach the limit
(and in the event of an emergency, measures can be
made before injury can occur).
ASHRAE and the International Mechanical Code of the
ICC as well as CSA provide guidance and define
safeguards related to the use of refrigerants, all of which
define a Refrigerant Concentration Level (RCL) of
25 pounds (11.3 kg) per 1,000 cubic feet (28.3 m
R410A refrigerant.
For additional guidance and precautions related to
refrigerant safety, please refer to the following documents:

International Mechanical Code 2012 (IMC-2012)
(or more recently revised)
ASHRAE 15
ASHRAE 34

3

) for

3

CONTENTS

Page Page

IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Please Read Before Starting

Check of Density Limit

1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1-1. Tools Required for Installation (not supplied)

1-2. Accessories Supplied with Unit

1-3. Type of Copper Tube and Insulation Material

1-4. Additional Materials Required for Installation

2. SELECTING THE INSTALLATION SITE . . . . . . . . . . . . . . 6

2-1. Indoor Unit

3. HOW TO INSTALL THE INDOOR UNIT . . . . . . . . . . . . . . 7

Ceiling Type (Type T2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

■

3-1. Required Minimum Space for Installation and Service

3-2. Preparation Before Installation

3-3. Suspending the Indoor Unit

3-4. Duct for Fresh Air

3-5. Shaping the Tubing

3-6. Installing the Drain Pipe

8. PRECAUTIONS ON TEST RUN . . . . . . . . . . . . . . . . . . . 19

Checkpoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

■

9. HOW TO INSTALL WIRELESS REMOTE CONTROLLER

RECEIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

N OT E

Refer to the Operating Instructions attached to the optional

Wireless Remote Controller Receiver.

10. APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Care and Cleaning

■

Troubleshooting

■

Tips for Energy Saving

■

4. ELECTRICAL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4-1. General Precautions on Wiring

4-2. Recommended Wire Length and Wire Diameter for

Power Supply System

4-3. Wiring System Diagrams

5. HOW TO PROCESS TUBING . . . . . . . . . . . . . . . . . . . . . 15

5-1. Connecting the Refrigerant Tubing

5-2. Connecting Tubing Between Indoor and Outdoor Units

5-3. Insulating the Refrigerant Tubing

5-4. Taping the Tubes

5-5. Finishing the Installation

6. FINAL PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

7. HOW TO INSTALL THE TIMER REMOTE CONTROLLER
OR HIGH-SPEC WIRED

REMOTE CONTROLLER (OPTIONAL PART) . . . . . . . . 18

N OT E

Refer to the Operating Instructions attached to the optional
Timer Remote Controller or optional High-spec Wired
Remote Controller.

4

1. GENERAL

This booklet briefly outlines where and how to install the
air conditioning system. Please read over the entire set of
instructions for the indoor and outdoor units and make sure all
accessory parts listed are with the system before beginning.

Part Name Figure

Full-scale
installation
diagram

Q’ty

For positioning

1

installation

Remarks

1-1. Tools Required for Installation (not supplied)

1. Flathead screwdriver

2. Phillips head screwdriver

3. Knife or wire stripper

4. Tape measure

5. Carpenter’s level

6. Sabre saw or keyhole saw

7. Hacksaw

8. Core bits

9. Hammer

10. Drill

11. Tube cutter

12. Tube flaring tool

13. Torque wrench

14. Adjustable wrench

15. Reamer (for deburring)

1-2. Accessories Supplied with Unit

The accessory parts are supplied inside the indoor unit.
Open the air-intake grille of the indoor unit and take out a

package of accessories.
See the section “3-2. Preparation Before Installation”.

Table 1-1 (

Part Name Figure Q’ty Remarks

Special
washer

Drain insulator

Ceiling

)

For temporarily

4

suspending indoor unit
from ceiling

2 For drain hose joint

Wire cover

Screw

Part Name

Figure

Operating
Instructions

Installation
Instructions

Warranty
card

●

Use 3/8” (M10) for suspension bolts.

●

Field supply for suspension bolts and nuts.

1-3.

Type of Copper Tube and Insulation Material

1 For control box

1 For wire cover

Q’ty

Remarks

1

1

1

If you wish to purchase these materials separately from a local
source, you will need:

1. Deoxidized annealed copper tube for refrigerant tubing.

2. Foamed polyethylene insulation for copper tubes as required
to precise length of tubing. Wall thickness of the insulation
should be not less than 5/16” (8 mm).

3. Use insulated copper wire for field wiring. Wire size varies
with the total length of wiring.
Refer to “4. ELECTRICAL WIRING” for details.

CAUTION

Check local electrical codes and regulations before

obtaining wire.

Also, check any specified instructions or

limitations.

Flare insulator

Clamper

Clamper

Drain hose

Hose band

Screw

Part Name Figure

Side cover (R)

Side cover (L)

1 For gas tube joint

1 For liquid tube joint

4 For flare insulator

1 For wiring

For main unit + PVC pipe

1

joints

For drain hose

1

connection

2 For side cover (L/R)

Q’ty

1

1

Remarks

(Packed in carton box)
For right side

(Packed in carton box)
For left side

1-4. Additional Materials Required for Installation

1. Refrigeration (armored) tape

2. Insulated staples or clamps for connecting wire (See your
local codes.)

3. Putty

4. Refrigeration tubing lubricant

5. Clamps or saddles to secure refrigerant tubing

6. Scale for weighing

5

2. SELECTING THE INSTALLATION SITE

Ceiling

2-1. Indoor Unit

AVOID:

● areas where leakage of flammable gas may be expected.

● places where large amounts of oil mist exist.

● direct sunlight.

● locations near heat sources which may affect the

performance of the unit.

● locations where external air may enter the room directly.
This may cause “condensation” on the air discharge ports,
causing them to spray or drip water.

● locations where the remote controller will be splashed with
water or affected by dampness or humidity.

● installing the remote controller behind curtains or furniture.

● locations where high-frequency emissions are generated.

DO:

● select an appropriate position from which every corner of the
room can be uniformly cooled.

● select a location where the ceiling is strong enough to
support the weight of the unit.

● select a location where tubing and drain pipe have the
shortest run to the outdoor unit.

● allow room for operation and maintenance as well as
unrestricted air flow around the unit.

● install the unit within the maximum elevation difference
above or below the outdoor unit and within a total tubing
length (L) from the outdoor unit as detailed in the Installation
I

nstructions packed with the outdoor unit.

●

allow room for mounting the remote controller about 3.3ft. (1 m)
off the floor, in an area that is not in direct sunlight or in the flow
of cool air from the indoor unit.

Ceiling

Wall

min. 0.83ft. (250mm)

N OT E

The rear of the indoor unit can be installed flush against
the wall.

Air
discharge

min.

1.64ft. (500mm)

min. 0.83ft. (250mm)

Front view

Side view

Air intake

max.

(250mm)
Obstacle

0.83ft.

Fig. 2-1

6

3. HOW TO INSTALL THE INDOOR UNIT

Ceiling Type (Type T2)

■

Unit: inch (mm)

B

C

3-1. Required Minimum Space for Installation and

Service

(1) Dimensions of suspension bolt pitch and unit

26

36, 42

Length

inch 48-17/64 50-13/64 9-1/4

mm 1226 1275 235

inch 62-43/64 62-19/32 9-1/4

mm 1541 1590 235

Type

(2) Refrigerant tubing • drain hose position

10-33/64

(267)

Left drain position

Closed with rubber stopper
at time of shipment.

A B C

(196)

7-23/32

(39)

1-17/32

3-35/64

(90)

Rear (Figure shows view from front)Left side

Left drain position

bolt pitch)

(Suspension

31/32

(24.5)

2-3/4

(70)

Gas tubing
Liquid tubing
Right drain position

(190)

7-31/64

(265)

10-7/16

A

(Suspension bolt pitch)

3-25/64

(131)

5-5/32

3-35/64

(90)

Right drain position

(196)

7-23/32

(39)

1-17/32

27-11/64 (690)

31/32
(24.5)

Right side

(Liquid tubing •
Gas tubing)

7-23/64

10-33/64 (267)

Air intake

Air discharge

Fig. 3-1

Unit: inch (mm)

Fig. 3-2

(3) Unit opening position (Refrigerant tubing • drain hose • power inlet port • remote control wiring inlet port)

Unit: inch (mm)

Left-side drain hose
outlet port

Top outlet port

2-29/32 (74)

4-3/32 (104)

Right-side drain
hose outlet port

Side cover

Rear outlet port (Figure shows view from front)

Remote control wiring
and inter-unit wiring inlet port

Outside air intake duct

4-23/32

(120)

(105)

4-9/64

(196)

7-23/32

3-35/64

(90)

connection port
(ø3-15/16 (100), cutout)

Left-rear side drain
hose outlet port
(cutout)

4-27/32

(123)

(131)

5-5/32

7-9/32

Cover of tubing hole

Power Supply inlet

2-13/32 (61

4-27/32 (123

4-3/32

(104)

4-31/64

(114)

)

*1 Use a compass saw, jig saw or similar tool and cut along

)

the indented portion of the side cover and make a hole
inside the cover.

*2 When pulling the refrigerant tubing from the upper side,

cut along the indented portion and pass the tubing
through the hole.

N OT E

Be sure to use sealing putty to seal off the opening to

prevent dust.

Fig. 3-3

7

3-2. Preparation Before Installation

(1) Remove the bracket (for suspending the indoor unit).

Loose the M8 or 5/16” suspension bolts.

Then remove the bracket. (Fig. 3-4)

N OT E

Loosen the M8 or 5/16” suspension bolts and expose the
axis of bolts less than 5/16” (8 mm).

Less than 5/16” (8 mm)

M4 or 5/32” screw for
preventing bracket from
taking off

Remove the air-intake grille before suspending the indoor unit. First,

(2)

remove 2 attachment screws fixed with the latches. Open the air­intake grille and hold the claws of the hinges on both sides. Then
remove the air-intake grille and suspension lug located on the left
and right side of the indoor unit.

M8 or 5/16” suspension bolts
for suspending the indoor unit

Bracket

Fig. 3-4

(4) Remove the center bracket.

When wiring, remove the center bracket if necessary. When

wiring is completed, reinstall the center bracket in its original
position.

Center bracket

Fig. 3-8

3-3. Suspending the Indoor Unit

N OT E

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.

(1) If the full-scale installation diagram is placed on the ceiling, the

locations of each suspension bolt can be chosen.
Take a pencil and mark the drill holes (Fig. 3-9).

Full-scale installation diagram

Ceiling

Air-intake grille

1

1

2

claws

Air-intake grille

Remove

Remove

(3) Remove the side plate to the tubing side.

Rear & upper side
tubing connection

Right side tubing
connection

Remove 2 screws.
Slide the side plate in the direction of
the arrow and remove it.

Do not remove the side plate.

Remove

Screw

Latch

Slide

Fig. 3-5

Fig. 3-6

Full-scale installation diagram

Wall

Fig. 3-9

(2) If the full-scale installation diagram is bent at right angle to the

ceiling and wall, the locations of the inlet for indoor tubing and
wiring are chosen and the locations of each suspension bolt
can also be chosen.
Take a pencil and mark the drill holes (Fig. 3-10).

Ceiling

Wall

Full-scale installation diagram

Full-scale installation diagram

Fig. 3-10

N OT E

The dimension when the indoor unit is placed tightly
against the wall.
When installing away from the wall, drainage gradient
should be taken into consideration.

(3)

Drill holes at the 4 points indicated on the full-scale diagram.

(4) Depending on the ceiling type:

a) Insert suspension bolts (Fig. 3-11).

or

b) Use existing ceiling supports or construct a suitable

support (Fig. 3-12).

Hole-in-anchor
Hole-in-plug

Concrete

Insert

Ceiling tiles

Ceiling support

Screw

Side plate

Fig. 3-7

Suspension bolt (M10 or 3/8”)
(not supplied)

8

Fig. 3-11 Fig. 3-12