Panasonic S-07MM2U6, S-09MM2U6, S-12MM2U6, S-15MM2U6, S-18MM2U6 installation

INSTALLATION INSTRUCTIONS

VRF System Air Conditioner

This air conditioner uses the refrigerant R410A.

Model No.

Indoor Units

Type Indoor Unit Type

M2 Slim Low Static Ducted S-07MM2U6 S-09MM2U6 S-12MM2U6 S-15MM2U6 S-18MM2U6

7 9 12 15 18

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

F616519

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

• Ventilate the room well, 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 poisonous gas.

• Keep all tubing runs as short as possible.

• Use the flare method for connecting tubing.

• 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.

• Check for a leaking refrigerant!
Refrigerant gas may produce a toxic gas if it

comes in contact with fire.

• 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 being serviced.

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. Escaped
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 poisonous 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. 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).

Others

CAUTION

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

• 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.

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 m3) for
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

CONTENTS

Page Page

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

Please Read Before Starting

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

Indoor Unit

8. HOW TO INSTALL WIRELESS REMOTE

CONTROLLER RECEIVER . . . . . . . . . . . . . . . . . . 19

N OT E

Refer to the Operating Instructions attached to the
optional Wireless Remote Controller Receiver.

9. EXTERNAL STATIC PRESSURE SETTING . . . . . 20

9-1. How to Set on PC Board

9-2. Operating the Timer Remote Controller (CZ-

RTC2)

9-3. Operating the High-spec Wired Remote

Controller (CZ-RTC3)

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

■ Slim Low Static Ducted Type (Type M2) . . . . . . . . . 7

3-1. Required Minimum Space for Installation and

Service

3-2. Preparations Before Installation

3-3. For Bottom Intake

3-4. Installing the Duct

3-5. Suspending the Indoor Unit

3-6. Installing the Drain Pipe

3-7. Checking the Drainage

4. ELECTRICAL WIRING . . . . . . . . . . . . . . . . . . . . . . 12

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 . . . . . . . . . . . . . . . . 16

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

10. APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

■ Names of Parts

■ Care and Cleaning

■ Troubleshooting

■ Tips for Energy Saving

6. PRECAUTIONS ON TEST RUN . . . . . . . . . . . . . . 19

7. HOW TO INSTALL THE TIMER REMOTE
CONTROLLER (CZ-RTC2) OR HIGH-SPEC WIRED
REMOTE CONTROLLER (CZ-RTC3)

(OPTIONAL PART) . . . . . . . . . . . . . . . . . . . . . . . . 19

N OT E

Refer to the Operating Instructions attached to the
optional Timer Remote Controller or optional High­spec 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.

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

Part Name Figure Q’ty Remarks

Washer 8 For suspension fitting

For gas pipe /

1

Flare
insulator

liquid pipe connection

For gas pipe /

1

liquid pipe connection

1-3. Type of Copper Tube and Insulation Material

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.

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

Clamper

Drain hose
insulation

Drain hose

L=131

Hose band

Short-circuit
connection

4 For flare connection

For drain pipe

2

connection

For unit & PVC pipe

1

connection

For drain hose

2

connection

For high static pressure
(Located on the

1

back of the electrical
component box lid. )

● Use 3/8”(M10) for suspension bolts.

● Suspension bolts and nuts are field supply.

5

2. SELECTING THE INSTALLATION SITE

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 manual packed with the outdoor unit.

● allow room for mounting the remote controller about

3.3 ft. (1 m) off the floor, in an area that is not in direct
sunlight nor in the flow of cool air from the indoor unit.

● The elevation (Slim Low Static Ducted) between the
bottom unit and the floor surface should be at least 8
feet (2.4 m).

● If the elevation (Slim Low Static Ducted) between them
is less than 8 feet (2.4 m), install a filter or a protective
device (field supply) not to touch the electrical parts or
fan with hands.

8 feet (2.4 m) or more

Floor

● If the indoor unit is installed on the ceiling where the
temperature or humidity inside is high (over
86°F(30°C)/RH: 70%), add insulating material to the
surface of the unit to avoid dew condensation.

6

Fig. 2-1

3. HOW TO INSTALL THE INDOOR UNIT

25-13/64 (640)

Slim Low Static Ducted Type (Type M2)

■

3-1. Required Minimum Space for Installation and

● This air conditioner is usually installed above the

● The minimum space for installation and service is

● *H dimension means the minimum height of the unit.

● Select the *H dimension such that a downward slope

● The diagram shows the detailed dimensions of the

Service

ceiling so that the indoor unit and ducts are not visible.
Only the air intake and air outlet ports are visible from
below.

shown in the diagram. (Fig. 3-1)

of at least 1/100 is ensured as indicated in “3-6.
Installing the Drain Pipe”.

indoor unit. (Fig. 3-2)

6

(145)

5-45/64

1-9/64 (29)

Flange for air outlet duct

22-13/64 (564)

(Suspension bolt pitch)

(194)

7-41/64

1-1/2 (38)

(126)

4-61/64

(Flange for air outlet duct)

25-13/64 ((6-19/64)x4)

(Suspension bolt pitch)

27-1/4 (692)

640 (160x4)

5-ø1/8 (ø3.1(Hole))

29-17/32 (750)

32-7/16 (824)

26-49/64 (680)

3-51/64 (96)

2-19/32 (66)

1-1/32 (26)

(27)

1-1/16

4

Inspection access

(17-23/32”x17-23/32”)

(Field supply)

1-29/64 (37)

5-29/32 (150)

5

10

9

(450x450)

7

32-7/16” (824)

(Suspension bolt pitch)

Min.
7-7/8”

(200)
or more

Min. 4” (100 mm) or more for bottom air intake

Refrigerant tubing joint (liquid tube)

1

Refrigerant tubing joint (gas tube)

2

Upper and bottom drain port (O.D.1.05 inch (26.7 mm))

3

Suspension lug

4

Power supply outlet (for conduit ø7/8” (ø22 mm))

5

Flange for air outlet duct

6

Cover plate

7

Electrical component box

8

Filter

9

Control wiring outlet
(for inter-unit control wiring, group control wiring

0

and remote controller wiring)(ø11/16” (ø17 mm))

(564)

22-13/64”

Flange for air
outlet duct

Min. 25/32” (20) or more

Min. 25/32” (20) or more

1-7/64 (28)
1-3/16 (30)

3-3/16 (81)

Min. 7-7/8” (200)
or more

Refrigerant tubing

Min. 25-5/8” (650)

3-5/16

7

1

Water inlet

2

1-19/64 (33)
6-1/32 (153)

8

5-29/32

(150)

7-7/8
(200)

55/64 (22)

1-37/64 (40)

(155)

6-7/64

4-23/32

(23)

19/32

29/32

(23)

35/64 (14)

(120)

5-13/64

(15)

10-ø1/8 (ø3.1)(Hole)

35/64 (14)

8-21/32

(132)

(220)

27-23/32 (704)(29/32)

* Filter Uninstalled

8-21/32

(220)

Electrical
component box

Inspection

access

17-23/32”

x

17-23/32”

(450x450)

or more

Unit: inch (mm)

(200)

7-7/8”

*H=Min. 9-1/2”

Ceiling

Unit: inch (mm)

2-ø1/8 (ø3.1)

(Hole)

(84)

25/64 (10)

5-5/8

(143)

3-5/32 (80)

3

5-13/64

(132)

29/32
(23)

*H=Min. (240)

Fig. 3-1

1-3/16 (30)

9-3/8 (238)1-47/64 (44)

35/64
(14)

Fig. 3-2

3-2. Preparations Before Installation

(1) Confirm the positional relationship between the unit and

suspension bolts. (Fig. 3-3)

Install the inspection opening on the control box side

●

where maintenance and inspection of the control box
and drain pump are easy. Install the inspection opening
also in the lower part of the unit.

3-3. For Bottom Intake

For bottom intake, replace the cover plate and Frame
Filter Assy net in the procedure shown in the diagram.

(1) Remove the frame filter assy.

Remove the cover plate. (Fig. 3-4)

Air intake

Air discharge Air intake

A

(Inspection access)

27-1/2 (700)

Ceiling

Allow view A

Inspection access

(Field supply)

31-1/2 (800)

Unit: mm

Fig. 3-3

(2) Make sure the range of the unit’s external static

pressure is not exceeded.
(See the technical documentation for the range of the
external static pressure setting.)

(3) Open the installation hole. (Pre-set ceilings)

Once the installation hole is opened in the ceiling

●

where the unit is to be installed, pass refrigerant piping,
drain piping, inter-unit control wiring, and remote
controller wiring to the unit’s piping and wiring holes.
See “5. HOW TO PROCESS TUBING”, “3-6. Installing
the Drain Pipe” and “4. ELECTRICAL WIRING”.

After opening the ceiling hole, make sure ceiling is

●

level if needed. It might be necessary to reinforce the
ceiling frame to prevent shaking.
Consult an architect or carpenter for details.

Frame
Filter Assy

Cover plate

Air discharge

Dummy hole

Fig. 3-4

(2) Refer to the diagram to attach the cover plate and

frame filter assy in the direction of the arrow. (Fig. 3-5)
Note: Attach the cover plate with the dummy holes
downward.

Dummy hole

Cover plate

Frame
Filter Assy

Air discharge

Air intake

Fig. 3-5

(3) Attach the frame filter assy (supplied) in the manner

shown in the diagram. (Fig. 3-6)

Main unit

Attach the Frame Filter Assy to
the main unit while pushing the
tip of the latches in the direction
of the arrow.

Frame Filter Assy

In case of bottom side In case of back side

8

Fig. 3-6

3-4. Installing the Duct

Connect the duct supplied in the field as shown in Fig. 3-7.

Flange

(Field supply)
Connection screw (x10)
Rectangular solid duct

(Field supply)

Main unit

Flange

Insulation material

(Field supply)

Hole-in-anchor
Hole-in-plug

Suspension bolt

(M10 or 3/8”)
(field supply)

Concrete

Insert

Ceiling tiles

Ceiling support

Air inlet side

Air outlet side

Fig. 3-7

Air inlet side

• Attach the duct and intake-side flange (field supply).

• Connect the flange to the main unit with 10 - ø1/8”

(ø3.1) (Hole) screws.

• Wrap the intake-side flange and duct connection area
with aluminum tape or something similar to prevent air
escaping.

CAUTION

When attaching a duct to the intake-side, be sure
to attach an air filter inside the air passage on the
intake-side. (Use an air filter whose dust collecting
efficiency is at least 50% in a gravimetric technique.)
The included filter is not used when the intake duct is
attached.

Air outlet side

• Connect the duct according to the air outside of the

outlet-side flange.

• Wrap the outlet-side flange and the duct connection
area with aluminum tape or something similar to
prevent air escaping.

CAUTION

Fig. 3-8 Fig. 3-9

WARNING

It 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.

(1) When placing the unit inside the ceiling, determine

the pitch of the suspension bolts referring to the
dimensional data as shown in Fig. 3-1.
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. 3-8. (Cut the ceiling
material, if necessary.)

(3) Thread the 3 hexagonal nuts and 2 washers (field

supply) onto each of the 4 suspension bolts as shown
in Fig. 3-10 and 3-11. Use 1 nut and 1 washer for the
upper part, and 2 nuts and 1 washer for the lower part,
so that the unit will not fall off the suspension lugs.

Nuts and washers (use
for upper and lower)

Suspension bolt

Suspension lug

Suspension bolt

Be sure to insulate the duct to prevent condensation

●

from forming. (Material: glass wool or polyethylene
foam, 1 inch (25 mm) thick)

Use electric insulation between the duct and the wall

●

when using metal ducts to pass metal laths of the net
or fence shape or metal plating into wooden buildings.

Be sure to explain about the way of maintaining and

●

cleaning local procurements (air filter, grille [both air
outlet and suction grille], etc.) to your customer.

3-5. Suspending the Indoor Unit

Depending on the ceiling type:

• Insert suspension bolts as shown in the diagram.

(Fig. 3-8)
or

• Use existing ceiling supports or construct a suitable

support as shown in the diagram. (Fig. 3-9)

Double nuts

Fig. 3-10

9

Notch



Hexagonal nut

Double nuts

Fig. 3-11