Panasonic cs-ke18nku, cs-ke24nku operating instructions

APPENDIX B

CS-KE18NKU + CU-KE24NKU
CS-KE24NKU + CU-KE24NKU

INSTALLATION INSTRUCTIONS

(852-6-4190-579-00-1)

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-KE18NKU CU-KE18NKU

CS-KE24NKU CU-KE24NKU

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

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. Remove the Rear Panel from the Unit
3-2. Make a Hole
3-3. Install the Rear Panel on the Wall
3-4. Remove the Grille to Install the Indoor Unit
3-5. Shape the Indoor Side Tubing
3-6. Wiring Instructions
3-7. Recommended Wire Length and Diameter
3-8. Wiring Instructions for Inter-unit Connections
3-9. Mounting
3-10. Drain Hose

4. HOW TO INSTALL THE OUTDOOR UNIT ....... 17

4-1. Wiring Instructions for the Outdoor Unit

5. REFRIGERANT TUBING .................................. 18

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................................................... 20

 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 ......................................................... 24

7-1. Mounting on a Wall

8. ADDRESS SWITCH .......................................... 25

8-1. Address Setting of the Remote Controller

85264190579001 2011

CV6233187211

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.

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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

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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 Figure Q’ty Parts Figure Q’ty

Remote
controller

Remote control
holder

Tapping screw

1

1

Rawl plug

Truss-head
Phillips

5

/32 x5/8" (4x16 mm)

6. Sabre saw or key hole 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)

Parts Figure Q’ty

10

Clamp

8

Cushion
rubber*

1

4

AAA alkaline
battery

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

2

Drain hose

adapter

1

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 3-6.
Wiring Instructions for details.

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.

Table 2

Model

CS-KE18NKU 1/4" (6.35 mm) 0.0314" (0.8 mm) 1/2" (12.70 mm) 0.0314" (0.8 mm)

CS-KE24NKU 1/4" (6.35 mm) 0.0314" (0.8 mm) 5/8" (15.88 mm) 0.0393" (1.0 mm)

Outer Dia. Thickness Outer Dia. Thickness

Narrow Tube Wide Tube

CAUTION

*Packed in the outdoor unit.

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

4

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

AVOID:

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.

Indoor unit

2" (5 cm)

min.

Outside drainage

Fig. 1

6" (15 cm)
min.

Drain hose

2" (5 cm)

min.

 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. (High on a wall is best.)

 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. (Fig. 1)

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

stricted air flow around the unit. (Fig. 2)

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

above or below the outdoor unit and within a total tubing length
(L) from the outdoor unit as detailed in Table 3 and Fig. 3a.

 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.

Front View

Fig. 2

INDOOR
UNIT

Elevation
difference (H)

Fig. 3a

CAUTION

For stable operation of the
air conditioner, do not
install wall-mounted type
indoor units less than 5'
(1.5 m) from floor level.

Tubing length (L)

OUTDOOR
UNIT

Indoor unit

Minimum height
from floor level

5' (1.5 m)

Floor level

Wall

Fig. 3b

Table 3

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

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

CS-KE18NKU 25 100 50 0.27

CS-KE24NKU 33 100 50 0.27

* If total tubing length becomes 25 to 100 ft. (Max.) or 33 to 100 ft. (Max.), charge additional refrigerant (R410A) by 0.27 oz./ft.

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

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

5

2-2. Outdoor Unit

AVOID:

 heat sources, exhaust fans, etc. (Fig. 4)
 damp, humid or uneven locations.

NO

Hot air

Exhaust fan

Heat source

DO:

 choose a place as cool as possible.
 choose a place that is well ventilated.
 allow enough room around the unit for air intake/

exhaust and possible maintenance. (Fig. 5a or 5b)

 provide a solid base (level concrete pad, concrete block,

4"  1'4" (10  40 cm) or 6"  1'4" (15  40 cm) beams
or equal), a minimum of 4" (10 cm) or 6" (15 cm) above
ground level to reduce humidity and protect the unit
against possible water damage and decreased service
life. (Figs. 5c and 5d or 5e)

CAUTION

 install cushion rubber under unit’s feet to reduce

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

vibration and noise. (Fig. 5f)

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

vibration and noise.

 install in a location where no antenna of a television

or radio exists within 10' (3 m).

(CU-KE18NKU)

Air intake

Concrete
or equal

About 1'4" (40 cm)

About 4" (10 cm)

Anchor bolts
(4 pcs.)

Min. 4" (10 cm)

Outdoor unit

(CU-KE18NKU)

Air intake Min. 4" (10 cm)

Min.

2" (5 cm)

Air discharge

(CU-KE24NKU)

Air intake Min. 6" (15 cm)

Min.

4" (10 cm)

Air discharge

Drain holes

Fig. 4

Valve
side
Min. 10"
(25 cm)

Min.
1'4" (40 cm)

Fig. 5a

Valve
side
Min. 10"
(25 cm)

Min.
1'8" (50 cm)

Fig. 5b

Obstacle above

Min.

7' (2 m)

Air discharge

Ground

Obstacle above

Min.

7' (2 m)

Air discharge

Ground

Min. 6" (15 cm)

Air intake

Min.

7' (2 m)

Obstacle

Min. 4" (10 cm)

Air intake

Min.

7' (2 m)

Obstacle

(CU-KE24NKU)

Air intake

Concrete
or equal

About 1'4" (40 cm)

Fig. 5d

Fig. 5e

Anchor bolts
(4 pcs.)

Min. 6" (15 cm)

About 6" (15 cm)

Fig. 5c

Cushion rubber

Fig. 5f

6

3. How to Install the Indoor Unit

3-1. Remove the Rear Panel from the Unit

(1) Remove and discard the set screw on the rear

panel. (Fig. 6)

(2) Press the 2 

marks on the frame cover and disen-

gage the stationary tabs from the frame. (Fig. 7)

(3) Remove the rear panel.

NOTE

Tubing can be extended in 5 directions as shown in Fig.

8. Select the direction you need providing the shortest

run to the outside unit.

 When left tubing is to be done, switch the drain hose

and drain cap. (For details, refer to “Switching drain
hose and drain cap” on page 15.)

3-2. Make a Hole

(1) Place the rear panel from the indoor unit on the wall

at the location selected. Make sure the panel is hori­zontal, using a carpenter’s level or tape measure to
measure down from the ceiling. Wait until after cut­ting the hole before attaching the rear panel to the
wall.

(2) Determine which side of the unit you should make

the hole for tubing and wiring. (Fig. 9)

NOTE

Left
tubing

Set screw only for transportation

Fig. 6

Rear panel

Fig. 7

Left-rear
tubing

marks

Right-rear
tubing
(recommended)

Right tubing

In the case of left-rear tubing, use the measurement
points 2-3/8" (60 mm) from the edge of the rear panel for
precise placement of the hose outlet. (Fig. 9)

(3) Before making the hole, check carefully that no

studs or pipes are directly run behind the spot to be
cut.

CAUTION

Also avoid areas where elec­trical wiring or conduits are
located.

The above precautions are also applicable if tubing
goes through the wall in any other location.

Downward tubing

Fig. 8

2-3/8" (60 mm)

Fig. 9

7

g

(4) Using a sabre saw, key hole saw or hole-cutting drill

attachment, cut a hole in the wall. See Table 4 and
Fig. 10.

Table 4

Hole Dia.

3-5/32" (80 mm)

(5) Measure the thickness of the wall from the inside

edge to the outside edge and cut PVC pipe at a
slight angle 1/4" (6 mm) shorter than the thickness of
the wall. (Fig. 11)

(6) Place the plastic cover over the end of the pipe (for

indoor side only) and insert the pipe in the wall. (Fig.

12)

3-3. Install 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 8 screws

provided. (Fig. 13)

NOTE

Hole should be made at a slight downward slant to the
outdoor side.

Indoor
side

Outdoor
side

Fig. 10

PVC pipe (Locally purchased)

Cut at sli

ht angle

Fig. 11

INSIDE OUTSIDE

Wall

Plastic cover

(Locally purchased)

PVC pipe

Slight
angle

If you are not able to line up the holes in the rear
panel with the beam locations marked on the wall,
use rawl plugs or toggle bolts to go through the
holes on the panel or drill 3/16" (5 mm) dia. holes in
the panel over the stud locations and then mount the
rear panel.

(2) Double check with a carpenter’s level or tape mea-

sure that the panel is level. This is important to
install the unit properly. (Fig. 14)

(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" (4.8 mm) dia. holes in the wall. Insert rawl
plugs for appropriate mounting screws. (Fig. 15)

Fig. 12

Fig. 13

Fig. 14

3/16"
(4.8 mm) dia. hole

Rawl plug

Fig. 15

8