Cooper&Hunter CH18DKT230V Installation Manual

Mini Split
Air Conditioner
with Heat Pump

Installation Manual

CH-09DKT230VI/ CH-09DKT230VO
CH-12DKT230VI/ CH-12DKT230VO
CH-18DKT230VI/ CH-18DKT230VO
CH-24DKT230VI/ CH-24DKT230VO

Table of Contents

Installation Manual

0

Safety Precautions........................... 4

Accessories........................................ 6

1

Installation Summary - Indoor Unit........

2

3

Unit Parts.......................................... 10

8

4

Indoor Unit Installation........ 11

5

Outdoor Unit Installation...

1. Select installation location.................. 20

2. Install drain joint................................

3. Anchor outdoor unit..........................

4. Connect signal and power cables.......23

21

22

20

1. Select installation location.......................... 11

2. Attach mounting plate to wall....................

3. Drill wall hole for connective piping............

4. Prepare refrigerant piping...........................

5. Connect drain hose....................................

6. Connect signal cable..................................

7. Wrap piping and cables..............................

8.

Mount indoor unit.....................................

15

17

18

12

12

14

18

6

Refrigerant Piping Connection. ...... 25

A. Note on Pipe Length................................................25

B. Connection Instructions –Refrigerant Piping. ........... 25

1. Cut pipe..............................................................25

2. Remove burrs. .....................................................26

3. Flare pipe ends. .................................................. 26

4. Connect pipes. ....................................................27

MC MC

Air Evacuation. ................. 29

7

1. Evacuation Instructions. .................... 29

2. Note on Adding Refrigerant...............30

8

Electrical and Gas Leak Checks. ...... 31

9

Test Run. ...........................................32

Safety Precautions

Read Safety Precautions Before Installation

Incorrect installation due to ignoring instructions can cause serious damage or injury.

The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.

This symbol indicates that ignoring instructions may cause death or serious

WARNING

CAUTION

injury.

This symbol indicates that ignoring instructions may cause moderate injury
to your person, or damage to your unit or other property.

This symbol indicates that you must never perform the action indicated.

WARNING

Do not modify the length of the power supply cord or use an extension cord to power the unit.
Do not

can cause fire or electrical shock.

When connecting refrigerant piping, do not
refrigerant enter the unit. The presence of other gases or substances will lower the unit’s capacity,
and can cause abnormally high pressure in the refrigeration cycle. This can cause explosion and
injury.

Do not

unit at all times.

1.

Installation must be performed by an authorized dealer or specialist. Defective installation can
cause water leakage, electrical shock, or fire.

2.

Installation must be performed according to the installation instructions. Improper installation can
cause water leakage, electrical shock, or fire.

(In North America,installation must be performed in accordance with the requirement of NEC and
CEC by authorized personnel only.)

Contact an authorized service technician for repair or maintenance of this unit.

3.

Only use the included accessories, parts, and specified parts for installation. Using non-standard

4.

parts can cause water leakage, electrical shock, fire, and can cause the unit to fail.

share the electrical outlet with other appliances. Improper or insufficient power supply

let substances or gases other than the specified

allow children to play with the air conditioner. Children must be supervised around the

5.

Install the unit in a firm location that can support the unit’s weight. If the chosen location cannot
support the unit’s weight, or the installation is not done properly, the unit may drop and cause
serious injury and damage.

 Page 4 

WARNING

6.

For all electrical work, follow all local and national wiring standards, regulations, and the
Installation Manual. You must use an independent circuit and single outlet to supply power. Do
not connect other appliances to the same outlet. Insufficient electrical capacity or defects in
electrical work can cause electrical shock or fire.

7.

For all electrical work, use the specified cables. Connect cables tightly, and clamp them securely to
prevent external forces from damaging the terminal. Improper electrical connections can overheat
and cause fire, and may also cause shock.

8.

All wiring must be properly arranged to ensure that the control board cover can close properly. If
the control board cover is not closed properly, it can lead to corrosion and cause the connection

points on the terminal to heat up, catch fire, or cause electrical shock.
In certain functional environments, such as kitchens, server rooms, etc., the use of specially designed

9.

air-conditioning units is highly recommended.

10.

If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly
qualified persons in order to avoid a hazard.

11.

This appliance can be used by children aged from 8 years and above and persons with reduced
Physical, sensory or mental capabilities or lack of experience and knowledge if they have been given
supervision or instruction concerning use of the appliance in a safe way and understand the hazards
involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be
made by children without supervision.

CAUTION

For units that have an auxiliary electric heater, do not install the unit within 3 feet (1 meter) of
any combustible materials.

Do not

gas accumulates around the unit, it may cause fire.
Do not operate your air conditioner in a wet room such as a bathroom or laundry room. Too

much exposure to water can cause electrical components to short circuit.

1.

The product must be properly grounded at the time of installation, or electrical shock may occur.

2.

Install drainage piping according to the instructions in this manual. Improper drainage may cause
water damage to your home and property.

Note about Fluorinated Gasses

1.

This air-conditioning unit contains fluorinated gasses. For specific information on the type of gas
and the amount, please refer to the relevant label on the unit itself.

2.

Installation, service, maintenance and repair of this unit must be performed by a certified
technician.

3.

Product uninstallation and recycling must be performed by a certified technician.

4.

If the system has a leak-detection system installed, it must be checked for leaks at least every 12
months.

install the unit in a location that may be exposed to combustible gas leaks. If combustible

5.

When the unit is checked for leaks, proper record-keeping of all checks is strongly
recommended.

 Page 5 

Accessories

1

The air conditioning system comes with the following accessories. Use all of the installation
parts and accessories to install the air conditioner. Improper installation may result in water
leakage, electrical shock and fire, or cause the equipment to fail.

Name

Mounting plate

Clip anchor

Mounting plate fixing screw

Remote control

Fixing screw for remote
control holder

Remote control holder

Shape Quantity

1

5

5

1

2

Optional
Parts

Dry battery AAA.LR03

Seal

Drain joint

 Page 6 

1

2

1

(for cooling & heating

models only)

Name

Shape Quantity

User’s Manual

Installation Manual

Quick Start Guide

Connecting pipe
assembly

Liquid side

Gas side

Ø 1

/4 in/6.35mm

Ø

3/8in/9.52mm

Ø

3/8in/9.52mm

Ø

1/2in/12.7mm

Ø

3/4in/19mm

1

1

1

Parts you must purchase.
Consult the dealer about

the pipe size.

Ø

5/8in/16mm

 Page 7 

Installation

Overview

Installation Summary - Indoor Unit

1 2

4.75in

(12cm)

90.55in (2.3m)

5.9in (15cm)

4.75in

(12cm)

2

Select Installation Location

(Page 11)

3 4

Determine Wall Hole Position

(Page 12)

 Page 8 

Attach Mounting Plate

(Page 12)

Drill Wall Hole

(Page 12)

5 6 7

Installation

Overview

8

Connect Piping

(Page 25)

Connect Wiring

(Page 17)

Wrap Piping and Cable

(not applicable for some locations in the US )

(Page 18)

Prepare Drain Hose

(Page 14)

9

8

STEP

Mount Indoor Unit

(Page 18)

 Page 9 

Installation

Overview

Unit Parts

3

NOTE: The installation must be performed in accordance with the requirement of local and
national standards. The installation may be slightly different in different areas.

2

4

5

1

2

3

6

7

8

4

5

9

11

10

1

Air-break switch

3

6

7

8

11

（1） （2）

Fig. 2.1

Wall Mounting Plate

1

2

Front Panel

Power Cable (Some Units)

3

Louver

4

Functional Filter (On Front of

5

Main Filter - Some Units)

6

Drainage Pipe

7

Signal Cable

8

Refrigerant Piping

Remote Control

9

Remote control Holder

10

(Some Units)

Outdoor Unit Power Cable

11

(Some Units)

NOTE ON ILLUSTRATIONS

Illustrations in this manual are for explanatory purposes. The actual shape of your indoor
unit may be slightly different. The actual shape shall prevail.

 Page 10 

Indoor Unit Installation

4

Indoor Unit

Installation

Installation Instructions – Indoor
Unit

PRIOR TO INSTALLATION

Before installing the indoor unit, refer to the
label on the product box to make sure that the
model number of the indoor unit matches the
model number of the outdoor unit.

Step 1: Select installation location

Before installing the indoor unit, you must
choose an appropriate location. The following
are standards that will help you choose an
appropriate location for the unit.

Proper installation locations meet the
following standards:



Good air circulation



Convenient drainage



Noise from the unit will not disturb other
people



Firm and solid—the location will not vibrate



Strong enough to support the weight of the
unit

DO NOT install unit in the following

locations:

Near any source of heat, steam, or
combustible gas

Near flammable items such as curtains or
clothing

Near any obstacle that might block air
circulation

Near the doorway
In a location subject to direct sunlight

NOTE ABOUT WALL HOLE:

If there is no fixed refrigerant piping:
While choosing a location, be aware that you

should leave ample room for a wall hole (see
Drill wall hole for connective piping step)
for the signal cable and refrigerant piping
that connect the indoor and outdoor units.
The default position for all piping is the right
side of the indoor unit (while facing the unit).
However, the unit can accommodate piping to
both the left and right.



A location at least one meter from all other
electrical devices (e.g., TV, radio, computer)

 Page 11 

Refer to the following diagram to ensure proper distance from walls and ceiling:

5.9in (15cm) or more

Indoor Unit

Installation

Step 2: Attach mounting plate to wall

The mounting plate is the device on which you
will mount the indoor unit.

1.

2.

3.

4. Secure the mounting plate to the wall with

5. Make sure that mounting plate is flat against

4.75in (12cm)
or more

90.55in (2.3m) or more

Fig. 3.1

Remove the screw that attaches the mounting
plate to the back of the indoor unit.

Place the mounting plate against the wall
in a location that meets the standards in
the Select Installation Location step. (See
Mounting Plate Dimensions for detailed
information on mounting plate sizes.)

Drill holes for mounting screws in places that:

• have studs and can support the weight of
the unit

• correspond to screw holes in the

mountingplate

the screws provided.

the wall.

NOTE FOR CONCRETE OR BRICK WALLS:

If the wall is made of brick, concrete, or similar
material, drill

0.2in-diameter (5mm-diameter)
holes in the wall and insert the sleeve anchors
provided. Then secure the mounting plate to
the wall by tightening the screws directly into
the clip anchors.

4.75in (12cm)
or more

Step 3: Drill wall hole for connective piping

You must drill a hole in the wall for refrigerant
piping, the drainage pipe, and the signal cable
that will connect the indoor and outdoor units.

1.

Determine the location of the wall hole based
on the position of the mounting plate. Refer
to Mounting Plate Dimensions on the
next page to help you determine the optimal
position. The wall hole should have a
(

65mm) diameter at least, and at a slightly

2.5in

lower angle to facilitate drainage.

2.

Using a 2.5in (65mm) or 3.54in (90mm)
(depending on models) core drill, drill a
hole in the wall. Make sure that the hole
is drilled at

a slight downward angle, so
that the outdoor end of the hole is lower
than the indoor end by about 0.2-0.3in
(5mm to 7mm). This will ensure proper
water drainage. (See Fig. 3.2)

3. Place the protective wall cuff in the hole. This
protects the edges of the hole and will help
seal it when you finish the installation process.

CAUTION

When drilling the wall hole, make sure to
avoid wires, plumbing and other sensitive
components.

 Page 12 

Indoor

Wall

Outdoor

mm7-5

0.2-0.3in

Fig. 3.2

MOUNTING PLATE DIMENSIONS

Different models have different mounting plates.
In order to ensure that you have ample room to
mount the indoor unit, the diagrams to the right
show different types of mounting plates along
with the following dimensions:

•

Width of mounting plate

•

Height of mounting plate

•

Width of indoor unit relative to plate

•

Height of indoor unit relative to plate

•

Recommended position of wall hole (both
to the left and right of mounting plate)

•

Relative distances between screw holes

Correct orientation of Mounting Plate

Left rear wall hole

2.5 in (65mm)

Left rear wall hole

2.5in (65mm)

Left rear wall hole

2.5in (65mm)

12.4in (315mm)

7.1in (180mm

1.8in (45mm)

5.5in

(140mm

1.8in (45mm)

0.9in (23.2mm)

10.2in (260mm

)

Indoor unit
outline

)

32.9in (835mm

)

39in (990mm

CH-18DKT230VI

Indoor unit
outline

29.5in

(

750mm

16.88in (429mm

4.3in (110mm

)

CH-09DKT230VI

16.88in (429mm

)

CH-12DKT230VI

18.7in (

)

4.3in (110mm

)

36.5mm

(

1.4in

475mm

5.3 in (

135mm

)

)

)

)

36.5mm

1.8in

(

1.4 in(

45mm

)

)

1.8in (45 mm)

11in (280mm)

Right rear wall

hole 2.5in(65mm)

)

)

11in (280mm)

Right rear wall
hole 2.5in (65mm)

Indoor unit outline

1.8 in (45mm)

Right rear wall
hole 2.5in (65mm)

Indoor Unit

Installation

Left rear wall hole

2.5in 65mm

Indoor unit
outline

10.1in (257mm

46.7in (1186mm

)

23.85in (606mm

10.8in (275mm

)

)

)

21.5mm(0.85in)

(343mm)

5in

.

1.8in (45mm)

13

Right rear wall
hole 2.5in 65mm

CH-24DKT230VI

NOTE: When the gas side connective pipe is

Φ

5/8in (16mm) or more, the wall hole

should be 3.54in (90mm).

 Page 13 

Step 4: Prepare refrigerant piping

The refrigerant piping is inside an insulating
sleeve attached to the back of the unit. You must
prepare the piping before passing it through the
hole in the wall. Refer to the Refrigerant Piping
Connection section of this manual for detailed
instructions on pipe flaring and flare torque
requirements, technique, etc.

1. Based on the position of the wall hole relative

Indoor Unit

Installation

2. If the wall hole is behind the unit, keep the

to the mounting plate, choose the side from
which the piping will exit the unit.

knock-out panel in place. If the wall hole is to
the side of the indoor unit, remove the plastic
knock-out panel from that side of the unit.
(See Fig. 3.3 ). This will create a slot through
which your piping can exit the unit. Use
needle nose pliers if the plastic panel is too
difficult to remove by hand.

3. Use scissors to cut down the length of the
insulating sleeve to reveal about 6in (15cm)
of the refrigerant piping. This serves two
purposes:

• To facilitate the Refrigerant Piping

Connection process

• To facilitate Gas Leak Checks and enable
you to check for dents

4.

If existing connective piping is already
embedded in the wall, proceed directly to
the Connect Drain Hose step. If there is no
embedded piping, connect the indoor unit’s
refrigerant piping to the connective piping
that will join the indoor and outdoor units.
Refer to the Refrigerant Piping Connection
section of this manual for detailed instructions.

5.

Based on the position of the wall hole
relative to the mounting plate, determine the
necessary angle of your piping.

6.

Grip the refrigerant piping at the base of the
bend.

Fig. 3.3

Knock-out Panel

7.

Slowly, with even pressure, bend the piping
towards the hole. Do not dent or damage the
piping during the process.

NOTE ON PIPING ANGLE

Refrigerant piping can exit the indoor unit from
four different angles:

•

Left-hand side

•

Left rear

•

Right-hand side

•

Right rear

Refer to

Fig. 3.4 for details.

Fig. 3.4

CAUTION

Be extremely careful not to dent or damage the piping while bending them away from the
unit. Any dents in the piping will affect the unit’s performance.

 Page 14 

Step 5: Connect drain hose

By default, the drain hose is attached to the left­hand side of unit (when you’re facing the back
of the unit). However, it can also be attached to
the right-hand side.

PLUG THE UNUSED DRAIN HOLE

To prevent unwanted leaks you must plug
the unused drain hole with the rubber plug
provided.

1.

To ensu

re proper drainage, attach the drain
hose on the same side that your refrigerant
piping exits the unit.

2.

Attach drain hose extension (pur

chased

separately) to the end of drain hose.

3.

Wrap the connection point firmly with
tape to ensure a good seal and to prevent
leaks.

4.

For the portion of the drain hose that will
remain indoors, wrap it with foam pipe
insulation to prevent condensation.

5.

Remove the

air filter and pour a small amount
of water into the drain pan to make sure that
water flows from the unit smoothly.

NOTE ON DRAIN HOSE
PLACEMENT

Make sure to arrange the drain hose
according to

DO NOT

Fig. 3.5.

kink the drain hose.

Teflon

Make sure there are no

kinks or dent in drain

hose to ensure proper

Fig. 3.5

NOT CORRECT

Kinks in the drain hose
will create water traps.

CORRECT

drainage.

Fig. 3.6

Indoor Unit

Installation

DO NOT

DO NOT

create a water trap.

put the end of drain hose in
water or a container that will collect
water.

NOT CORRECT

Kinks in the drain hose
will create water traps.

Fig. 3.7

NOT CORRECT

Do not place the end

of the drain hose in

water or in containers

that collect water. This

will prevent proper

drainage.

Fig. 3.8

 Page 15 

Indoor Unit

Installation

BEFORE PERFORMING ELECTRICAL WORK, READ THESE REGULATIONS

1.

All wiring must comply with local and national electrical codes, and must be installed by a
licensed electrician.

2.

All electrical connections must be made according to the Electrical Connection Diagram
located on the panels of the indoor and outdoor units.

3.

If there is a serious safety issue with the power supply, stop work immediately. Explain your
reasoning to the client, and refuse to install the unit until the safety issue is properly resolved.

4.

Power voltage should be within 90-110% of rated voltage. Insufficient power supply can
cause malfunction, electrical shock, or fire.

5.

If connecting power to fixed wiring, install a surge protector and main power switch with a
capacity of 1.5 times the maximum current of the unit.

6.

If connecting power to fixed wiring, a switch or circuit breaker that disconnects all poles and
has a contact separation of at least 1/8in (3mm) must be incorporated in the fixed wiring. The
qualified technician must use an approved circuit breaker or switch.

7.

Only connect the unit to an individual branch circuit outlet. Do not connect another appliance
to that outlet.

8.

Make sure to properly ground the air conditioner.

9.

Every wire must be firmly connected. Loose wiring can cause the terminal to overheat,
resulting in product malfunction and possible fire.

10.

Do not let wires touch or rest against refrigerant tubing, the compressor, or any moving parts
within the unit.

11.

If the unit has an auxiliary electric heater, it must be installed at least 40in (1 meter) away
from any combustible materials.

WARNING

BEFORE PERFORMING ANY ELECTRICAL OR WIRING WORK, TURN OFF THE MAIN POWER
TO THE SYSTEM.

 Page 16 

Step 6: Connect signal cable

The signal cable enables communication between
the indoor and outdoor units. You must first
choose the right cable size before preparing it for
connection.

Minimum Cross-Sectional Area of

1.

Power and Signal Cables

North America

Appliance Amps (A)

AWG

10 18

TAKE NOTE OF FUSE SPECIFICATIONS

The air conditioner’s circuit board (PCB) is
designed with a fuse to provide overcurrent
protection. The specifications of the fuse
are printed on the circuit board, such as:
T3.15A/250VAC, T5A/250VAC, etc.

Prepare the cable for connection:

a.

Using wire strippers, strip the rubber
jacket from both ends of signal cable to
reveal about 1.57in (40mm) of the wires
inside.

b.

Strip the insulation from the ends of the
wires.

Indoor Unit

Installation

13 16
18 14
25 12
30 10

Other Regions

Rated Current of

Nominal Cross-Sectional

Appliance (A)

> 3 and ≤ 6

> 6 and ≤ 10

> 10 and ≤ 16

> 16 and ≤ 25

> 25 and ≤ 32

> 32 and ≤ 40

Area (mm²)

0.75

1

1.5

2.5

4

6

c.

Using wire crimper, crimp u-type lugs on
the ends of the wires.

PAY ATTENTION TO LIVE WIRE

While crimping wires, make sure you clearly
distinguish the Live (“L”) Wire from other wires.

2. O

pen front panel of the indoor unit.

3.

Using a screwdriver, open the wire box cover
on the right side of the unit. This will reveal

Terminal block

Wire cover

Screw

Cable clamp

Fig. 3.9

CHOOSE THE RIGHT CABLE SIZE

The size of the power supply cable, signal
cable, fuse, and switch needed is determined
by the maximum current of the unit. The
maximum current is indicated on the nameplate
located on the side panel of the unit. Refer to
this nameplate to choose the right cable, fuse,
or switch.

The Wiring Diagram is located

on the inside of the indoor unit’s

wire cover.

WARNING

ALL WIRING MUST PERFORMED STRICTLY
IN ACCORDANCE WITH THE WIRING
DIAGRAM LOCATED ON THE INSIDE OF THE
INDOOR UNIT S WIRE COVER.

4.

Unscrew the cable clamp below the terminal
block and place it to the side.

5.

Facing the back of the unit, remove the plastic
panel on the bottom left-hand side.

’

 Page 17 

6. Feed the signal wire through this slot, from

7. Facing the front of the unit, match the wire

Indoor Unit

Installation

the back of the unit to the front.

colors with the labels on the terminal block,
connect the u-lug and and firmly screw each
wire to its corresponding terminal.

CAUTION

DO NOT MIX UP LIVE AND NULL WIRES

This is dangerous, and can cause the air
conditioning unit to malfunction.

DO NOT INTERTWINE SIGNAL CABLE WITH
OTHER WIRES

While bundling these items together, do not
intertwine or cross the signal cable with any
other wiring.

2.

Using adhesive vinyl tape, attach the drain
hose to the underside of the refrigerant pipes.

3.

Using insulation tape, wrap the signal wire,
refrigerant pipes, and drain hose tightly
together. Double-check that all items are
bundled in accordance with Fig. 3.10.

DO NOT WRAP ENDS OF PIPING

8.

After checking to make sure every connection
is secure, use the cable clamp to fasten the
signal cable to the unit. Screw the cable clamp
down tightly.

9.

Replace the wire cover on the front of the

unit, and the plastic panel on the back.

NOTE ABOUT WIRING

THE WIRING CONNECTION PROCESS MAY
DIFFER SLIGHTLY BETWEEN UNITS.

Step 7: Wrap piping and cables

Before passing the piping, drain hose, and the
signal cable through the wall hole, you must
bundle them together to save space, protect
them, and insulate them.

1.

Bundle the drain hose, refrigerant pipes, and
signal cable according to Fig. 3.10.

Indoor Unit

When wrapping the bundle, keep the ends
of the piping unwrapped. You need to access
them to test for leaks at the end of the
installation process (refer to Electrical Checks

and Leak Checks section of this manual).

Step 8: Mount indoor unit
If you installed new connective piping to the

outdoor unit, do the following:

1.

If you have already passed the refrigerant
piping through the hole in the wall, proceed
to Step 4.

2.

Otherwise, double-check that the ends of the
refrigerant pipes are sealed to prevent dirt or
foreign materials from entering the pipes.

3.

Slowly pass the wrapped bundle of refrigerant
pipes, drain hose, and signal wire through the
hole in the wall.

4.

Hook the top of the indoor unit on the upper
hook of the mounting plate.

Space behind unit

Refrigerant piping

Insulation tape

Signal wire

Drain hose

Fig. 3.10

DRAIN HOSE MUST BE ON BOTTOM

Make sure that the drain hose is at the bottom
of the bundle. Putting the drain hose at the
top of the bundle can cause the drain pan
to overflow, which can lead to fire or water
damage.

 Page 18 

5.

Check that unit is hooked firmly on mounting
by applying slight pressure to the left and
right-hand sides of the unit. The unit should
not jiggle or shift.

6.

Using even pressure, push down on the
bottom half of the unit. Keep pushing down
until the unit snaps onto the hooks along the
bottom of the mounting plate.

7.

Again, check that the unit is firmly mounted
by applying slight pressure to the left and the
right-hand sides of the unit.

If refrigerant piping is already embedded in
the wall, do the following:

1.

Hook the top of the indoor unit on the upper
hook of the mounting plate.

2.

Use a bracket or wedge to prop up the unit,
giving you enough room to connect the
refrigerant piping, signal cable, and drain
hose. Refer to Fig. 3.11 for an example.

3.

Connect drain hose and refrigerant piping
(refer to Refrigerant Piping Connection
section of this manual for instructions).

4.

Keep pipe connection point exposed to
perform the leak test (refer to Electrical
Checks and Leak Checks section of this
manual).

5.

After the leak test, wrap the connection point
with insulation tape.

6.

Remove the bracket or wedge that is propping
up the unit.

7.

Using even pressure, push down on the
bottom half of the unit. Keep pushing down
until the unit snaps onto the hooks along the
bottom of the mounting plate.

Indoor Unit

Installation

Fig. 3.11

 Page 19 

Outdoor Unit

Installation

Installation Instructions – Outdoor
Unit

Step 1: Select installation location

Before installing the outdoor unit, you must
choose an appropriate location. The following
are standards that will help you choose an
appropriate location for the unit.

Proper installation locations meet the
following standards:

Outdoor Unit Installation

30cm

12in

left

on

24 in (60 cm) above bovve

5

(30cm)

12in

from back wall

24in

(60cm)

on right



Meets all spatial requirements shown in
Installation Space Requirements (Fig. 4.1)



Good air circulation and ventilation



Firm and solid—the location can support the
unit and will not vibrate



Noise from the unit will not disturb others



Protected from prolonged periods of direct
sunlight or rain

 Page 20 

in front

(200 cm)

79in

DO NOT

install unit in the following locations:

Fig. 4.1

Near an obstacle that will block air inlets
and outlets

Near a public street, crowded areas, or
where noise from the unit will disturb others

Near animals or plants that will be harmed
by hot air discharge

Near any source of combustible gas
In a location that is exposed to large

amounts of dust
In a location exposed to a excessive amounts

of salty air

SPECIAL CONSIDERATIONS FOR EXTREME
WEATHER

If the unit is exposed to heavy wind:

Install unit so that air outlet fan is at a 90°
angle to the direction of the wind. If needed,
build a barrier in front of the unit to protect it
from extremely heavy winds.

See Fig. 4.2 and Fig. 4.3 below.

Strong wind

Strong wind

Fig. 4.2

Wind Baffle

If the drain joint comes with a rubber seal

(see Fig. 4.4 - A ), do the following:

1.

Fit the rubber seal on the end of the drain joint
that will connect to the outdoor unit.

2.

Insert the drain joint into the hole in the base
pan of the unit.

3.

Rotate the drain joint 90° until it clicks in place
facing the front of the unit.

4.

Connect a drain hose extension (not included)
to the drain joint to redirect water from the
unit during heating mode.

If the drain joint doesn’t come with a rubber

seal (see Fig. 4.4 - B ), do the following:

1.

Insert the drain joint into the hole in the base
pan of the unit. The drain joint will click in
place.

2.

Connect a drain hose extension (not included)
to the drain joint to redirect water from the
unit during heating mode.

Outdoor Unit

Installation

Strong wind

Fig. 4.3

If the unit is frequently exposed to heavy
rain or snow:

Build a shelter above the unit to protect
it from the rain or snow. Be careful not to
obstruct air flow around the unit.

If the unit is frequently exposed to salty air
(seaside):

Use outdoor unit that is specially designed to
resist corrosion.

Step 2: Install drain joint

Heat pump units require a drain joint. Before

In cold climates, make sure that the drain hose
is as vertical as possible to ensure swift water
drainage. If water drains too slowly, it can
freeze in the hose and flood the unit.

bolting the outdoor unit in place, you must install
the drain joint at the bottom of the unit. Note
that there are two different types of drain joints
depending on the type of outdoor unit.

Base pan hole of
outdoor unit

Seal

Seal

Drain joint

(A) (B)

Fig. 4.4

IN COLD CLIMATES

 Page 21 

Step 3: Anchor outdoor unit

The outdoor unit can be anchored
to the ground or to a wall-mounted

bracket.

UNIT MOUNTING DIMENSIONS

The following is a list of different
outdoor unit sizes and the distance
between their mounting feet.
Prepare the installation base of the
unit according to the dimensions
below.

Air inlet

D

W

Air inlet

A

Air outlet

B

Fig. 4.5

W

A

Outdoor Unit

Installation

CH-09DKT230VI

CH-12DKT230VI

CH-18DKT230VI

CH-24DKT230VI

If you will install the unit on the ground or
on a concrete mounting platform, do the

following:

1. Mark the positions for four expansion bolts

2. Pre-drill holes for expansion bolts.

3. Clean concrete dust away from holes.

4. Place a nut on the end of each expansion bolt.

5. Hammer expansion bolts into the pre-drilled

Model

Outdoor Unit Dimensions (in/mm)

W x H x D

31.5”x21.8”x13.1” (800x554x333mm)

31.5”x21.8”x13.1” (800x554x333mm)

33.25”x27.63”x14.29” (845x702x363mm)

37.21”x31.9”x16.53” (946x810x420mm)

based on dimensions in the Unit Mounting
Dimensions chart.

holes.

Mounting Dimensions

Distance A (in/mm)

20.24” (514mm)

20.24” (514mm)

21.26” (540mm)

26.5” (673mm)

Air inl

Distance B (in/mm)

13.39”(340mm)

13.39”(340mm)

13.8” (350mm)

15.87”(403mm)

6. Remove the nuts from expansion bolts, and
place outdoor unit on bolts.

7. Put washer on each expansion bolt, then
replace the nuts.

8. Using a wrench, tighten each nut until snug.

WARNING

WHEN DRILLING INTO CONCRETE, EYE
PROTECTION IS RECOMMENDED AT ALL
TIMES.

 Page 22 

If you will install the unit on a wall-mounted
bracket, do the following:

CAUTION

Before installing a wall-mounted unit, make
sure that the wall is made of solid brick,
concrete, or of similarly strong material. The

wall must be able to support at least four
times the weight of the unit.

1.

Mark the position of bracket holes based on
dimensions in the Unit Mounting Dimensions
chart.

2.

Pre-drill the holes for the expansion bolts.

3.

Clean dust and debris away from holes.

4.

Place a washer and nut on the end of each
expansion bolt.

5.

Thread expansion bolts through holes in
mounting brackets, put mounting brackets
in position, and hammer expansion bolts into
the wall.

6.

Check that the mounting brackets are level.

7.

Carefully lift unit and place its mounting feet
on brackets.

8.

Bolt the unit firmly to the brackets.

TO REDUCE VIBRATIONS OF WALL­MOUNTED UNIT

If allowed, you can install the wall-mounted
unit with rubber gaskets to reduce vibrations
and noise.

BEFORE PERFORMING
ELECTRICAL WORK,
READ THESE REGULATIONS

1.

All wiring must comply with local and
national electrical codes, and must be
installed by a licensed electrician.

2.

All electrical connections must be made
according to the Electrical Connection
Diagram located on the side panels of the
indoor and outdoor units.

3.

If there is a serious safety issue with the
power supply, stop work immediately. Explain
your reasoning to the client, and refuse
to install the unit until the safety issue is
properly resolved.

4.

Power voltage should be within 90-110% of
rated voltage. Insufficient power supply can
cause electrical shock or fire.

5.

If connecting power to fixed wiring, install a
surge protector and main power switch with
a capacity of 1.5 times the maximum current
of the unit.

6.

If connecting power to fixed wiring, a switch
or circuit breaker that disconnects all poles
and has a contact separation of at least 1/8in
(3mm) must be incorporated in the fixed
wiring. The qualified technician must use an
approved circuit breaker or switch.

7.

Only connect the unit to an individual branch
circuit outlet. Do not connect another
appliance to that outlet.

8.

Make sure to properly ground the air
conditioner.

Outdoor Unit

Installation

Step 4: Connect signal and power cables

The outside unit’s terminal block is protected by
an electrical wiring cover on the side of the unit.
A comprehensive wiring diagram is printed on
the inside of the wiring cover.

9.

Every wire must be firmly connected. Loose
wiring can cause the terminal to overheat,
resulting in product malfunction and possible
fire.

10. Do not

let wires touch or rest against
refrigerant tubing, the compressor, or any
moving parts within the unit.

11.

If the unit has an auxiliary electric heater, it
must be installed at least 40in (1 meter) away
from any combustible materials.

 Page 23 

BEFORE PERFORMING ANY ELECTRICAL
OR WIRING WORK, TURN OFF THE MAIN
POWER TO THE SYSTEM.

Appliance Amps (A)

Outdoor Unit

Installation

WARNING

Minimum Cross-Sectional Area of

Power and Signal Cables

North America

AWG

10 18

13 16

18 14

25 12

30 10

PAY ATTENTION TO LIVE WIRE

While crimping wires, make sure you clearly
distinguish the Live (“L”) Wire from other wires.

WARNING

ALL WIRING MUST PERFORMED STRICTLY
IN ACCORDANCE WITH THE WIRING
DIRGRAM LOCATED INSIDE THE OUTDOOR

’

UNIT S WIRE COVER.

2.

Unscrew the electrical wiring cover and
remove it.

3.

Unscrew the cable clamp below the terminal
block and place it to the side.

4.

Match the wire colors/labels with the labels on
the terminal block, and firmly screw the u-lug
of each wire to its corresponding terminal.

5.

After checking to make sure every connection
is secure, loop the wires around to prevent
rain water from flowing into the terminal.

Other Regions

Rated Current of

Appliance (A)

> 3 and ≤ 6 0.75

> 6 and ≤ 10

> 10 and ≤ 16

> 16 and ≤ 25

> 25 and ≤ 32

> 32 and ≤ 40

Nominal Cross-

Sectional Area (

1

1.5

2.5

4

6

mm²)

a. Using wire strippers, strip the rubber

jacket from both ends of cable to reveal
about

1.57in (40 mm) of the wires

inside.

b. Strip the insulation from the ends of the

wires.

c. Using a wire crimper, crimp u-lugs on the

ends of the wires.

6.

Using the cable clamp, fasten the cable to the
unit. Screw the cable clamp down tightly.

7.

Insulate unused wires with PVC electrical tape.
Arrange them so that they do not touch any
electrical or metal parts.

8.

Replace the wire cover on the side of the unit,
and screw it in place.

Cover

 Page 24 

Outdoor Unit Wiring Diagram
is located on the inside of the

wire cover on the outdoor unit.

Fig. 4.6

Refrigerant Piping Connection

6

Note on Pipe Length

The length of refrigerant piping will affect the performance and energy efficiency of the unit. Nominal
efficiency is tested on units with a pipe length

length is 25 ft (7.5m).

excessive noise. Refer to the table below for specifications on the maximum length and drop height
of piping.

A minimum pipe run of 9.84 ft (3 meters) is required to minimise vibration &

of 16.5ft (5 meters),

in North America, the standard pipe

Refrigerant

Connection

Piping

Maximum Length and Drop Height of Refrigerant Piping per Unit Model

Model Capacity (BTU/h)

< 15,000

R410A Inverter Split Air

Conditioner

R410A Fixed-speed
Split Air Conditioner

Connection Instructions –

Step 1: Cut pipes

When preparing refrigerant pipes, take extra care to cut and flare them properly. This will ensure
efficient operation and minimize the need for future maintenance.

1. Measure the distance between the indoor and outdoor units.

≥ 15,000 and < 24,000 98.5/30

≥ 24,000 and < 36,000 164/50

< 18,000

≥ 18,000 and < 36,000

Refrigerant Piping

Max. Length (ft/m) Max. Drop Height (ft/m)

82/25

66/20

82/25

33/10

66/20

82/25

8/26

33/10

 Page 25 

2. Using a pipe cutter, cut the pipe a little longer
than the measured distance.

3. Make sure that the pipe is cut at a perfect 90°

Step 2: Remove burrs

Burrs can affect the air-tight seal of refrigerant
piping connection. They must be completely
removed.

Refrigerant

Connection

Piping

1.

angle. Refer to Fig. 5.1 for bad cut examples.

90°

Oblique Rough Warped

Fig. 5.1

DO NOT DEFORM PIPE

WHILE CUTTING

Be extra careful not to damage, dent, or
deform the pipe while cutting. This will
drastically reduce the heating efficiency
of the unit.

Hold the pipe at a downward angle to prevent
burrs from falling into the pipe.

Flare nut

Copper pipe

Fig. 5.3

4.

Remove PVC tape from ends of pipe when
ready to perform flaring work.

5.

Clamp flare form on the end of the pipe.
The end of the pipe must extend beyond the
edge of the flare form in accordance with the
dimensions shown in the table below.

2.

Using a reamer or deburring tool, remove all
burrs from the cut section of the pipe.

Pipe

Reamer

Point down

Fig. 5.2

Step 3: Flare pipe ends

Proper flaring is essential to achieve an airtight
seal.

1.

After removing burrs from cut pipe, seal
the ends with PVC tape to prevent foreign
materials from entering the pipe.

2.

Sheath the pipe with insulating material.

Fig. 5.4

PIPING EXTENSION BEYOND FLARE FORM

Outer Diameter of

Pipe (in/mm)

Ø 1/4”/6.35mm

Ø 3/8”/9.52mm

Ø 1/2”/

Ø 5/8”/16mm

Ø 3/4”/19mm

12.7mm

Pipe (in/mm)

Flare form

0.03”/0.7mm

0.04”/1.0mm

0.04”/

0.08”/2.0mm

0.08”/2.0mm

A (in/mm)

Min. Max.

1.0mm

Max.

0.05”/1.3mm

0.06”/1.6mm

0.07”/1.8mm

0.07”/2.2mm

0.1”/2.4mm

A

↔

3.

Place flare nuts on both ends of pipe. Make
sure they are facing in the right direction,
because you can’t put them on or change
their direction after flaring. See

 Page 26 

Fig. 5.3.

Pipe

Fig. 5.5

6.

Place flaring tool onto the form.

7.

Turn the handle of the flaring tool
clockwise until the pipe is fully flared.

8.

Remove the flaring tool and flare form, then
inspect the end of the pipe for cracks and
even flaring.

Step 4: Connect pipes

When connecting refrigerant pipes, be careful
not to use excessive torque or to deform the
piping in any way. You should first connect the
low-pressure pipe, then the high-pressure pipe.

Instructions for Connecting Piping to
Indoor Unit

1.

Align the center of the two pipes that you will
connect. See Fig. 5.7

Indoor unit tubing Flare nut Pipe

.

Fig. 5.7

MINIMUM BEND RADIUS

When bending connective refrigerant piping,
the minimum bending radius is

.

5.6

≥4in

Radius

Fig. 5.6

(10cm)

4 in. See

Fig.

2.

Tighten the flare nut as tightly as possible by
hand.

3.

Using a spanner, grip the nut on the unit
tubing.

4.

While firmly gripping the nut on the unit
tubing, use a torque wrench to tighten the
flare nut according to the torque values in the
Torque Requirements table below. Loosen
the flaring nut slightly, then tighten again.

Fig. 5.8

Refrigerant

Connection

Piping

TORQUE REQUIREMENTS

Outer Diameter of Pipe (in/mm)

Ø 1/4”/ Ø 6.35mm

Ø 3/8”/ Ø 9.52mm

Ø 1/2”/Ø 12.7mm 25.8lb•ft /3,500 N•cm

Ø 5/8”/ Ø 16mm

Ø 3/4”/ Ø 19mm

Tightening Torque (lb•ft/N•cm)

11lb•ft /1,500 N•cm 11.8lb•ft /1,600 N•cm

18.4lb•ft /2,500 N•cm 19.18lb•ft /2,600 N•cm

33.19lb•ft/4,500 N•cm

47.94lb•ft /6,500 N•cm

Add. Tightening Torque

26.55lb•ft /3,600 N•cm

34.67lb•ft/4,700

49.42lb•ft/6,700

(lb•ft/N•cm)

N•cm

N•cm

DO NOT USE EXCESSIVE TORQUE

Excessive force can break the nut or damage the refrigerant piping. You must not exceed torque
requirements shown in the table above.

 Page 27 

Instructions for Connecting Piping
to Outdoor Unit

USE SPANNER TO GRIP MAIN
BODY OF VALVE

1.

Unscrew the cover from the packed valve on
the side of the outdoor unit. (See Fig. 5.9)

Valve cover

Fig. 5.9

2.

Remove protective caps from ends of valves.

3.

Align flared pipe end with each valve, and
tighten the flare nut as tightly as possible by
hand.

4.

Using a spanner, grip the body of the valve.
Do not grip the nut that seals the service
valve. (See Fig. 5.10)

Torque from tightening the flare nut can snap
off other parts of valve.

Fig. 5.10

Refrigerant

Connection

Piping

5.

While firmly gripping the body of the valve,
use a torque wrench to tighten the flare nut
according to the correct torque values.

6.

Loosen the flaring nut slightly, then tighten
again.

7.

Repeat Steps 3 to 6 for the remaining pipe.

 Page 28 

Air Evacuation

Manifold Gauge

Low pressure valve

MC MC

7

Preparations and Precautions

Air and foreign matter in the refrigerant circuit
can cause abnormal rises in pressure, which
can damage the air conditioner, reduce its
efficiency, and cause injury. Use a vacuum pump
and manifold gauge to evacuate the refrigerant
circuit, removing any non-condensable gas and
moisture from the system.

Evacuation should be performed upon initial
installation and when unit is relocated.

BEFORE PERFORMING EVACUATION



Check to make sure that both high­pressure and low-pressure pipes between
the indoor and outdoor units are
connected properly in accordance with the
Refrigerant Piping Connection section of
this manual.



Check to make sure all wiring is connected
properly.

Evacuation Instructions

Before using the manifold gauge and vacuum
pump, read their operation manuals to familiarize
yourself with how to use them properly.

Compound gauge

29.9 in

Pressure hose /
Charge hose

1.

Connect the charge hose of the manifold
gauge to service port on the outdoor unit’s
low pressure valve.

2.

Connect another charge hose from the
manifold gauge to the vacuum pump.

Hg

Low pressure valve

Pressure gauge

High pressure
valve

Charge hose

Vacuum
pump

Fig. 6.1

Air Evacuation

 Page 29 

3.

V

Open the Low Pressure side of the manifold
gauge. Keep the High Pressure side closed.

4.

Turn on the vacuum pump to evacuate the
system.

5.

Run the vacuum for at least 15 minutes, or
until the Compound Meter reads -

5

(-10 Pa).

HG

6.

Close the Low Pressure side of the manifold

29.9 in

gauge, and turn off the vacuum pump.

7.

Wait for 5 minutes, then check that there
has been no change in system pressure.

8.

If there is a change in system pressure, refer
to Gas Leak Check section for information
on how to check for leaks. If there is no
change in system pressure, unscrew the cap
from the packed valve (high pressure valve).

9.

Insert hexagonal wrench into the packed valve
(high pressure valve) and open the valve by
turning the wrench in a 1/4 counterclockwise
turn. Listen for gas to exit the system, then
close the valve after 5 seconds.

Flare nut

Cap

alve body

Valve stem

Fig. 6.2

11.

Remove the charge hose from the service port.

12.

Using hexagonal wrench, fully open both the
high pressure and low pressure valves.

13.

Tighten valve caps on all three valves (service
port, high pressure, low pressure) by hand.
You may tighten it further using a torque
wrench if needed.

10.

Watch the Pressure Gauge for one minute
to make sure that there is no change in
pressure. The Pressure Gauge should read
slightly higher than atmospheric pressure.

Note on Adding Refrigerant

Some systems require additional charging depending on pipe lengths. The standard pipe length varies
according to local regulations. For example, in North America, the standard pipe length is 25’ (7.5m).
In other areas, the standard pipe length is 16‘ (5m). The additional refrigerant to be charged can be
calculated using the following formula:

Connective Pipe

Air Evacuation

Length (m)

< Standard pipe length Vacuum Pump N/A

> Standard pipe

length

ADDITIONAL REFRIGERANT PER PIPE LENGTH

Air Purging

Method

Vacuum Pump

OPEN VALVE STEMS GENTLY

When opening valve stems, turn the hexagonal
wrench until it hits against the stopper. Do not
try to force the valve to open further.

Additional Refrigerant

Inverter R410A:

(Pipe length – standard length) 0.16oZ/ft

Fixed-frequency R410A:

(Pipe length – standard length) x 0.16oZ/ft

Inverter R410A:

(Pipe length – standard length) x 0.32oZ/ft

Fixed-frequency R410A:

(Pipe length – standard length) x 0.32oZ/ft

CAUTION

DO NOT mix refrigerant types.

 Page 30 

Electrical and Gas Leak Checks

8

Electrical Safety Checks

After installation, confirm that all electrical wiring
is installed in accordance with local and national
regulations, and according to the Installation
Manual.

BEFORE TEST RUN

Check Grounding Work

Measure grounding resistance by visual detection
and with grounding resistance tester. Grounding
resistance must be less than 0.1Ω.

Note: This may not be required for some
locations in the US.

DURING TEST RUN

Check for Electrical Leakage

During the Test Run, use an electroprobe and
multimeter to perform a comprehensive electrical
leakage test.

WARNING – RISK OF
ELECTRIC SHOCK

ALL WIRING MUST COMPLY WITH LOCAL
AND NATIONAL ELECTRICAL CODES,
AND MUST BE INSTALLED BY A LICENSED
ELECTRICIAN.

Gas Leak Checks

There are two different methods to check for gas
leaks.

Soap and Water Method

Using a soft brush, apply soapy water or liquid
detergent to all pipe connection points on the
indoor unit and outdoor unit. The presence of
bubbles indicates a leak.

Leak Detector Method

If using leak detector, refer to the device’s
operation manual for proper usage instructions.

Electrical and Gas

Leak Checks

If electrical leakage is detected, turn off the unit
immediately and call a licensed electrician to find
and resolve the cause of the leakage.

Note: This may not be required for some
locations in the US.

AFTER PERFORMING GAS LEAK CHECKS

After confirming that the all pipe connection
points DO NOT leak, replace the valve cover on
the outside unit.

 Page 31 

Test Run

9

Before Test Run

Only perform test run after you have completed
the following steps:

•

Electrical Safety Checks – Confirm that
the unit’s electrical system is safe and
operating properly

•

Gas Leak Checks – Check all flare nut
connections and confirm that the system is
not leaking

•

Confirm that gas and liquid (high and low
pressure) valves are fully open

Test Run Instructions

You should perform the Test Run for at least 30
minutes.

1.

Connect power to the unit.

2.

Press the ON/OFF button on the remote
control to turn it on.

List of Checks to Perform PASS/FAIL

No electrical leakage

Unit is properly grounded

All electrical terminals

properly covered

Indoor and outdoor units

are solidly installed

All pipe connection

points do not leak

Water drains properly

from drain hose

All piping is properly

insulated

Unit performs COOL

function properly

Outdoor

(2):

Indoor

(2):

Test Run

3.

Press the MODE button to scroll through the
following functions, one at a time:

•

COOL – Select lowest possible temperature

•

HEAT – Select highest possible temperature

4.

Let each function run for 5 minutes, and
perform the following checks:

Unit performs HEAT

function properly

Indoor unit louvers

rotate properly

Indoor unit responds to

remote control

 Page 32 

DOUBLE-CHECK PIPE CONNECTIONS

During operation, the pressure of the
refrigerant circuit will increase. This may
reveal leaks that were not present during your
initial leak check. Take time during the Test
Run to double-check that all refrigerant pipe
connection points do not have leaks. Refer to
Gas Leak Check section for instructions.

5.

After the Test Run is successfully completed,
and you confirm that all checks points in List
of Checks to Perform have PASSED, do the
following:

a.

Using remote control, return unit to
normal operating temperature.

b.

Using insulation tape, wrap the indoor
refrigerant pipe connections that you
left uncovered during the indoor unit
installation process.

Manual control
button

Fig. 8.1

IF AMBIENT TEMPERATURE IS BELOW 63°F
(17°C)

You can’t use the remote control to turn on
the COOL function when the ambient
temperature is below 63° F. In this instance,
you can use the MANUAL CONTROL button
to test the COOL function.

1.

Lift the front panel of the indoor unit, and
raise it until it clicks in place.

2.

The MANUAL CONTROL button is located
on the right-hand side of the unit. Press it 2
times to select the COOL function. See

Fig.8.1

.

3.

Perform Test Run as normal.

Test Run

 Page 33 

The design and specifications are subject to change without prior notice for
product improvement. Consult with the sales agency or manufacturer for details.