Panasonic KE12NB41 User Manual

APPENDIX B

INSTALLATION INSTRUCTIONS

CS-KE12NB41 & CZ-18BT1U + CU-KE12NK1
CS-KE18NB4UW & CZ-18BT1U + CU-KE18NKU

(852-6-4190-577-00-2)

A-2

INSTALLATION INSTRUCTIONS
Split System Air Conditioner

This air conditioner uses the refrigerant R410A.

NOTE

External diameter of service port R410A: 5/16"

Model Combinations

Combine indoor and outdoor units only as listed
below.

Model No.

Indoor Unit Outdoor Unit

CS-KE12NB41 CU-KE12NK1

Power Source:
60 Hz, single-phase, 115 V

CS-KE18NB4UW CU-KE18NKU

Power Source:
60 Hz, single-phase, 230/208 V

Ceiling Panel

CZ-18BT1U

Contents

Page

IMPORTANT!

Please Read Before Starting .................................. 2

1. GENERAL .......................................................... 4

1-1. Tools Required for Installation (not supplied)
1-2. Accessories Supplied with Unit
1-3. Optional Copper Tubing Kit
1-4. Type of Copper Tube and Insulation Material
1-5. Additional Materials Required for Installation

2. INSTALLATION SITE SELECTION ................... 5

2-1. Indoor Unit
2-2. Outdoor Unit

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

3-1. Preparation for Suspending
3-2. Suspending the Indoor Unit
3-3. Placing the Unit Inside the Ceiling
3-4. Installing the Drain Piping
3-5. Checking the Drainage
3-6. How to Install the Ceiling Panel
3-7. Wiring Instructions
3-8. Recommended Wire Length and Diameter
3-9. Wiring Instructions for Inter-unit Connections

4. HOW TO INSTALL THE OUTDOOR UNIT ....... 15

4-1. Wiring Instructions for the Outdoor Unit

5. REFRIGERANT TUBING .................................. 16

5-1. Use of the Flaring Method
5-2. Flaring Procedure with a Flare Tool
5-3. Caution before Connecting Tubes Tightly
5-4. Connecting Tubing between Indoor and

Outdoor Units
5-5. Insulation of Refrigerant Tubing
5-6. Taping the Tubes
5-7. Finishing the Installation

6. AIR PURGING................................................... 18

 Air Purging with a Vacuum Pump (for Test Run)
 Basic Functions of the Service Valves
 Pump Down
 Service Valve Connections

7. REMOTE CONTROLLER INSTALLATION

POSITION ......................................................... 22

7-1. Mounting on a Wall

8. ADDRESS SWITCH .......................................... 23

8-1. Address Setting of the Remote Controller

85264190577002 2011

CV6233187839

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.

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…

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.



Observe all local, state, and national electrical codes.



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

This symbol refers to a hazard

WARNING

CAUTION

or 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.

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

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 Ceiling or Wall

Make sure the ceiling/wall is strong enough to hold the
unit’s weight. It may be necessary to construct a strong
wood or metal frame to provide added support.

…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 1.5 m away from
the unit.

WARNING

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are completed or reconnected and checked.

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

death.

 *URXQGWKHXQLW following local electrical codes.

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heating at connection points and a possible fire hazard.

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the unit must be grounded.

When Wiring

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

When Connecting Refrigerant Tubing

 :KHQSHUIRUPLQJ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 refrige-

WARNING

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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.

2

rant cycle.

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cause fire.

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other than specified type.
It may cause product damage,
burst and injury etc.

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the flare and union tubes before connecting them,
then tighten the nut with a torque wrench for a leak­free connection.

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or re-installation, and while repairing refrigeration parts.
Handle liquid refrigerant carefully as it may cause frost­bite.

When Servicing

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before opening the unit to check or repair electrical
parts and wiring.

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parts.

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that no metal scraps or bits of wiring have been left inside
the unit being serviced.

Others

CAUTION

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the refrigeration system. Escaped refrigerant gas, on
contact with fire or heat, can produce dangerously
toxic gas.

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gas is leaking. If escaped gas comes in contact with a
stove, gas water heater, electric room heater or other heat
source, it can produce dangerously toxic gas.

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fins of the outdoor unit. You may get injured.

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accidentally.

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You may be injured and the unit may be damaged.

NOTE

The illustrations are based on the typical appearance of
a standard model. Consequently, the shape may differ
from that of the air conditioner that you are installing.

3

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. Standard screwdriver

2. Phillips head screwdriver

3. Knife or wire stripper

4. Tape measure

5. Carpenter’s level

1-2. Accessories Supplied with Unit

Table 1

Parts PartsFigure RemarksQ’ty Figure

Washer

Flare
insulation

Insulation tape

Vinyl tie

Drain hose
insulation

Remote
controller

Remote control
holder

AAA alkaline
battery

Full-scale
installation
diagram

1/8"(T3)
3/16"(T5)

3/32"(T2)

13/32"(T10)

8

2

set

2

8

1

1

1

2

1

6. Sabre saw or key hole saw

7. Hacksaw

8. Core bits

9. Hammer

10. Drill

For temporarily
suspending indoor
unit from ceiling

For wide /
narrow tube
connection

For wide /
narrow tube /
flare nut connection

For flare / drain
insulating
connection

For drain tube
connection

Printed on
container box

Truss head screw

Drain hose

Hose band

Tapping screw

Cushion rubber

Truss head screw

Special screw

Use M10 or 3/8" for suspension bolts.
Suspension bolts and nuts (locally purchased)

11. Tube cutter

12. Tube flaring tool

13. Torque wrench

14. Adjustable wrench

15. Reamer (for deburring)

3/16 13/32"
(5 10mm)

5-1/2"(L140)

Truss-head Phillips
5/32 5/8"
(4 16mm)

5/32 15/32"
(4 12mm)

3/16 1-9/16"
(5 40mm)

4

1

2

2

4

4

4

RemarksQ’ty

For full-scale
installation
diagram

For unit & PVC
tube connection

For drain hose
connection

Packed in the
outdoor unit

Packed in the
ceiling panel

1-3. Optional Copper Tubing Kit

Copper tubing for connecting the outdoor unit to the indoor unit is available in kits which contain the narrow and wide
tubing, fittings and insulation. Consult your nearest sales outlet or air conditioning workshop.

1-4. 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 as detailed in Table 2.
Cut each tube to the appropriate lengths 1' to 1'4" (30 cm to 40 cm) to dampen vibration between units.

2. Foamed polyethylene insulation for the specified 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 3-7. Wiring
Instructions for details.

CAUTION

Table 2

Model

CS-KE12NB41 1/4" (6.35 mm) 0.0314" (0.8 mm) 3/8" (9.52 mm) 0.0314" (0.8 mm)

CS-KE18NB4UW 1/4" (6.35 mm) 0.0314" (0.8 mm) 1/2" (12.70 mm) 0.0314" (0.8 mm)

Outer Dia. Thickness Outer Dia. Thickness

Narrow Tube Wide Tube

4

Check local electrical codes
and regulations before
obtaining wire. Also, check
any specified instructions or
limitations.

1-5. Additional Materials Required for Installation

1. Refrigeration (armored) tape

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

3. Putty

4. Refrigeration lubricant

5. Clamps or saddles to secure refrigerant tubing

2. Installation Site Selection

2-1. Indoor Unit

WARNING

To prevent abnormal heat genera­tion and the possibility of fire, do
not place obstacles, enclosures
and grilles in front of or surround­ing the air conditioner in a way
that may block air flow.

AVOID:

 direct sunlight.

 nearby heat sources that may affect performance of the unit.

 areas where leakage of flammable gas may be expected.

 places where large amounts of oil mist exist.

DO:

 select an appropriate position from which every corner of the

room can be uniformly cooled.

 select a location that will hold the weight of the unit.

 select a location where tubing and drain hose have the

shortest run to the outside.

3.3 ft.
(1m)

3.3 ft.

(1m)

Fig. 1

3.3 ft.
(1m)

Indoor unit

3.3 ft.

(1m)

3.3 ft.
(1m)

 allow room for operation and maintenance as well as unre-

stricted air flow around the unit. (Fig. 1)

 install the unit within the maximum elevation difference (H)

above or below the outdoor unit and within a total tubing length

Outdoor unit

Tubing length (L)

Elevation difference (H)

Fig. 2

(L) from the outdoor unit as detailed in Table 3 and Fig. 2.

 install the indoor unit more than 3.3' (1 m) away from any

antenna or power lines or connecting wires used for television,
radio, telephone, security system, or intercom. Electrical noise
from any of these sources may affect operation.

CAUTION

Air delivery will be degraded if the distance
from the floor to the ceiling is greater than
10 ft. (3 m).

Table 3

Max. Allowable Tubing Limit of Tubing Limit of Elevation Required Amount of

Model Length at Shipment Length (L) Difference (H) Additional Refrigerant

(ft.) (ft.) (ft.) (oz./ft.)*

CS-KE12NB41 25 65 23 0.16

CS-KE18NB4UW 25 100 50 0.27

* If total tubing length becomes 25 to 65 ft. (Max.) or 25 to 100 ft. (Max.), charge additional refrigerant (R410A) by 0.16 or 0.27 oz./ft.

No additional charge of compressor oil is necessary. For more detailed charging information, refer to the Technical & Service Manual.

5

2-2. Outdoor Unit

AVOID:

 heat sources, exhaust fans, etc. (Fig. 3)

 damp, humid or uneven locations.

DO:

 choose a place as cool as possible.

 choose a place that is well ventilated.

 install in a location where at least two sides are unob-

structed, so that the flow of air at the intake port or
exhaust port is not blocked, and so that sufficient
space is ensured for maintenance to be carried out
without trouble. In general the top also must be unob­structed. (Figs. 4a and 4b)

 provide a solid base (level concrete pad, concrete

block, 4"  1'4" (10  40 cm) beams or equal), a mini­mum of 4" (10 cm) above ground level to reduce
humidity and protect the unit against possible water
damage and decreased service life. (Figs. 5a and 5b)

NO

Hot air

Outdoor unit

(CU-KE12NK1)

Air intake Min. 2" (5 cm)

Min.

2" (5 cm)

Air discharge

Fig. 3

Valve
side
Min. 10"
(25 cm)

Min.
8" (20 cm)

Exhaust fan

Heat source

Obstacle above

Min.

7' (2 m)

Air discharge

Min.

7' (2 m)

Obstacle

CAUTION

A solid base must not cover
the hole of the bottom plate.

 install cushion rubber under unit’s feet to reduce vibra-

tion and noise. (Fig. 5c)

 use lug bolts or equal to bolt down unit, reducing vibra-

tion and noise.

 install in a location where no antenna of a television or

radio exists within 10' (3 m).

Drain holes

Fig. 5a

Anchor bolts
(4 pcs.)

(CU-KE18NKU)

Air intake Min. 4" (10 cm)

Min.

2" (5 cm)

Air discharge

Fig. 4a

Valve
side
Min. 10"
(25 cm)

Min.
1'4" (40 cm)

Fig. 4b

Ground

Obstacle above

Ground

Min. 2" (5 cm)

Air intake

Min.

7' (2 m)

Air discharge

Min. 4" (10 cm)

Air intake

Min.

7' (2 m)

Obstacle

Air intake

Concrete
or equal

About 1'4" (40 cm)

Min. 4" (10 cm)

Cushion rubber

About 4" (10 cm)

Fig. 5b Fig. 5c

6

3. How to Install the Indoor Unit

3-1. Preparation for Suspending

This unit uses a drain pump. Use a carpenter’s level to
check that the unit is level.

3-2. Suspending the Indoor Unit

(1) Fix the suspension bolts securely in the ceiling using

the method shown in the diagrams, by attaching
them to the ceiling support structure, or by any other
method that ensures that the unit will be securely
and safely suspended. (Fig. 6-1)

(2) Follow the diagram to make the holes in the ceiling.

(3) Determine the pitch of the suspension bolts using

the supplied full-scale installation diagram. The dia­gram shows the relationship between the positions
of the suspension fitting, unit, and panel. (Fig. 6-2)

3-3. Placing the Unit Inside the Ceiling

Hole-in-anchor
Hole-in-plug

Ceiling opening dimensions

21-1/32"(534

Suspension bolt pitch

Concrete Insert

Suspension bolt (M10 or 3/8")
(locally purchased)

Fig. 6-1

23-5/8"(600mm)

mm

)

)
mm

21-1/32"(534

)
mm

23-5/8"(600

Suspension bolt pitch

Ceiling opening dimensions

(1) Be sure to remove the fan protection (4pcs) for

transportation before hanging up the indoor unit.

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

the pitch of the suspension bolts using the supplied
full-scale installation diagram. (Fig. 6-3)
Tubing and wiring must be laid inside the ceiling
when suspending the unit. If the ceiling is already
constructed, lay the tubing and wiring into position
for connection to the unit before placing the unit
inside the ceiling.

(3) The length of suspension bolts must be appropriate

for a distance between the bottom of the bolt and the
bottom of the unit of more than 19/32" (15 mm) as
shown in the diagram. (Fig. 6-3)

(4) Thread the 3 hexagonal nuts (locally purchased) and

2 supplied washers onto each of the 4 suspension
bolts as shown in the diagram. Use 1 nut and 1
washer for the upper side, and 2 nuts and 1 washer
for the lower side, so that the unit will not fall off the
suspension lugs. (Fig. 6-4)

(5) Adjust so that the distance between the unit and the

ceiling bottom is 1/2" (13 mm) to 23/32" (18 mm).
Tighten the nuts on the upper side and lower side of
the suspension lug. (Fig. 6-4)

)
mm

(45

1-25/32"

)

)

mm

mm
(45

1-25/32"

4-19/32"

(117

Power supply port

)
mm

Over 19/32" (15

Supplied screw

Nuts and washers
(used for upper and lower)

22-5/8"(575mm)

6-5/16"2-3/32"

6-11/16"

mm

)(160mm)(53mm)

(170

Refrigerant tubing joint
(narrow tube side)
1/4( 6.35mm) (flared)

Fig. 6-2

Full-scale installation diagram
(printed on top of container box)

Fig. 6-3

Suspension bolt

Drain tube
connection port
(outer dia 1-1/32"( 26mm))

)
mm

)
mm

(215

8-15/32"

11-5/32"(283

)
mm

1-3/16"

(30

)
mm

1/2" – 23/32" (13~18

Suspension lug

Double nut

1/2" – 23/32"

(13~18

mm

)

Notch

Fig. 6-4

7