Kaisai KOU-18HFN1-QRC8, KOU-24HFN1-QRC8, KOU-18HFN1-QRC4, KOU-24HFN1-QRC4, KOU-30HFN1-QRC8 Service Manual

Contents i

Energy Related Products

SUPER DC INVERTER SERIES

Service Manual 2013

LFIS-B-1309

Contents

Contents i

Part 1 General Information .................................................................................................... 1

Part 2 Indoor Units ................................................................................................................. 6

Part 3 Outdoor Units ............................................................................................................. 65

Part 4 Installation .................................................................................................................. 77

Part 5 Electrical Control System ....................................................................................... 109

※The specifications, designs, and information in this book are subject to change without notice for
product improv e m ent.

General Information

General Information 1

Part 1

General Information

1. Model Lists ................................................................................................ 2

2. External Appearance ................................................................................ 3

2.1 Indoor Units ............................................................................................................ 3

2.2 Outdoor Units ......................................................................................................... 3

3. Nomenclature ........................................................................................... 4

4. Features .................................................................................................... 5

Model Lists

2 General Information

1. Model Lists

1.1 Indoor Units

R410A (capacity multiplied by 1000Btu/h)

Type Function 12 16 18 24 30 36

Super slim cassette Cooling and heating

● ● ● ●

Duct Cooling and heating ●

● ● ● ●

Ceiling-floor Cooling and heating

● ● ● ●

New Four-way cassette

(compact)

Cooling and heating

●

●

Console Cooling and heating ● ●

1.2 Outdoor Units

Universal Outdoor unit Model Compressor type Compressor Brand Matched indoor units

KOU-12HFN1-QRC8 Rotary GMCC

KCA2U-12HRFN1-QRC8

KFAU-12HRFN1-QRC8

KTBU-12HWFN1-QRC8

KOU-18HFN1-QRC4 Rotary GMCC

KCD-18HRFN1-QRC4

KTB-18HWFN1-QRC4

KUE-18HRDN1-QRC4

KOU-18HFN1-QRC8 Rotary GMCC

KCD-18HRFN1-QRC8

KTB-18HWFN1-QRC8(A)

KUE-18HRFN1-QRC8

KCA2-18HRFN1-QRC8

KFA-16HRFN1-QRC8

KOU-24HFN1-QRC4 Rotary GMCC

KCD-24HRFN1-QRC4

KTB-24HWDN1-QRC4

KUE-24HRDN1-QRC4

KOU-24HFN1-QRC8 Rotary GMCC

KCD-24HRFN1-QRC8

KTB-24HWFN1-QRC8

KUE-24HRFN1-QRC8

KOU-30HFN1-QRC8 Rotary GMCC

KTB-30HWFN1-QRC8

KCD-30HRFN1-QRC8

KUE-30HRFN1-QRC8

KOU-36HFN1-QRC4 Rotary Mitsubishi

KCD-36HRFN1-QRC4

KTB-36HWFN1-QRC4

KUE-36HRFN1-QRC4

KOU-36HFN1-RRC4 Rotary Mitsubishi

KOU-36HFN1-QRC8(5A0)

Rotary Mitsubishi

KCD-36HRFN1-QRC8
KTB-36HWFN1-QRC8(A)
KUE-36HRFN1-QRC8(A)

KOU-36HFN1-QRC8(520)

KOU-36HFN1-RRC8(5A0)

Rotary Mitsubishi

KOU-36HFN1-RRC8(520)

External Appearance

General Information 3

2. External Appearance

2.1 Indoor Units

Super slim cassette

Duct

Ceiling-Floor

Compact Four-way cassette

Console

2.2 Outdoor Units

Single fan outdoor unit

Double fan outdoor un it

Nomenclature

4 General Information

3. Nomenclature

3.1 Indoor Unit

M U B T- 36 H R D N1- Q RC4

Energy Efficiency Code

Power Supply
Q 220~240V,1N, 50Hz
R 380~420V, 3N, 50Hz
N 220~230V, 1N, 60Hz
D 220V~, 3N, 60Hz

C 380~420V,3N,60Hz
Refrigerant

N1 R410A -- R22

D DC Inverter -- On-Off
F Full DC

Control Mode
W Wired Control E Electric Control
M Mechanical Control R Remote Control

Function Code
C Cooling Only H Cooling & Heating

A Cooling & Heating+PTC
Capacity (¡ Á1000Btu/h)

T Tropical Condition

-- T1 Condition

Designed Time
A Time A Designed B Time B Designed
C Time C Designed D Time D Designed

Product Category
C Cassette Type V AHU Type
T Duct Type F Console Type
U Ceiling & Floor Type
H High Static Pressure Duct Type

Midea

3.2 Outdoor Unit

M O U T- 36 H D N1- R RC4

Energy Efficiency Code

Power Supply
Q 220~240V,1N, 50HZ
R 380~420V, 3N, 50Hz
N 220~230V, 1N, 60Hz
D 220V~, 3N, 60Hz

C 380~420v,3N,60HZ
Refrigerant

N1 R410A -- R22

D DC Inverter -- On-Off
F Full DC

Function Code
C Cooling Only H Cooling & Heating
A Cooling & Heating+PTC

Capacity (¡ Á10 00 Bt u/h)
T Tropical Condition

-- T1 Condition

U Side Discharge Outdoor Unit
V Top Discharge Outdoor Unit
S Centrifugal Fan Outdoor Unit

O Outdoor unit

Midea

Features

General Information 5

4. Features

4.1. To meet Europe A level, actual EER/COP of new product with BLDC mot ors of indoor & out door un it and
DC compressor will be hig her t han 3.4.

4.2. Low ambient kit is standard for outdoor units

4.3. Network control function is standard for the indoor units.

4.4. Standard auto restart function and follow me function.

4.5. Slim cassette with standard remote controller, wire controller and CCM for optional. Med Duct and

HESP duct with st andard wired controller, remot e c ont r ol ler and CCM for optional.

4.6. Standard anti-cold air function.

4.7. Standard auto defrosting function.

4.8. Standard self-diagnose function.

4.9. Standard timer function and sleep mode function controlled by controller.

Indoor Units

6 Indoor Units

Part 2

Indoor Units

Super Slim Cassette Type ................................................... 7

Duct Type ............................................................................ 20

Ceiling & Floor Type .......................................................... 35

New Four-way Cassette Type (Compact) ......................... 44

Console Type ..................................................................... 53

Super Slim Cassette Type

Indoor Units 7

Super Slim Cassette Type

1. Features .............................................................................. 8

2. Dimensions ....................................................................... 12

3. Service Space ................................................................... 13

4. Wiring Diagrams ............................................................... 14

5. Electric Characteristics ................................................... 15

6. Sound Levels .................................................................... 16

7. Accessories ...................................................................... 17

8. The Specification of Power .............................................. 18

9. Field Wiring ...................................................................... 19

Features

8 Indoor Units

1. Features

1.1 Overview

 Compact design, super slim body siz e, less space requirin g in installation
 Each louver can be separately contr ol led, more comfort air blowing i s pos sible.
 Auto-lifting panel design, more convenient to clean and maintain the filter. (optional)

Old Cassette New Slim Cassett e Reduction

18K-24K

840*230*840

840*205*840

11%↓

30K

840*300*840

840*205*840

32%↓

36K-48K

840*300*840

840*245*840

18%↓

60K

840*300*840

840*287*840

4%↓

1.2

Fresh air intake function

 Fresh air fulfills air quality more healthy and comfortable.
 Ventilation motor is optional to increase the effect of fresh air.

Features

Indoor Units 9

1.3 Optional ionizer generator

 Ionizer generator is optional to get refresh ing air to your room.

 Ionizer can be switched on or off by rem ot e c ont r oller.

When pressing the Clean Air button on the remote controller, Ionizer will work and the indicator light on
display board will shine.

New air-intake

IIoonniizzeerr ggeenneerraattoorr

ccoonnnneeccttoorr

VVeennttiillaattiioonn mmoottoorr

ccoonnnneeccttoorr

Features

10 Indoor Units

1.4 External air duct design

 Reserve external air duct, more flexible for the air supply.

1.5

Built-in draining pump

 Due to the improvement of structure, more co nvenient to repair or replace the draining pump.

 Built-in draining pump to make sure condensed water drain out reliably.

Draining Pump

Features

Indoor Units 11

1.6 Term inals for alarm lamp and long-distance on-off controller connection are
standard

 Reserve terminals for the connection of alarm lamp and long-distance on-off controller, more human

control.

1.7 Optional touch screen wired controller

 Touch screen wired controller is optional, with error code indication function. Better

man-machine conversation interface.

 Undated structure design, 4-way wire layout design, no raised part at backside, more convenient to

place the wires and install the device.

1.8 Twins Combination(18k-30k)

 The units can be installed as Twin systems: one outdoor unit can connect with two indoor units. The

indoor units can be combined in any of the different available ratings.

Alarm lamp

Long-distance on-off controller

Dimensions

12 Indoor Units

2. Dimensions

Model

A

H

KCD-18HRFN1-QRC4
KCD-18HRFN1-QRC8

205 >235

KCD-24HRFN1-QRC4

205

>235

KCD-24HRFN1-QRC8

245

>275

KCD-30HRFN1-QRC8

245

>275

KCD-36HRFN1-QRC4
KCD-36HRFN1-QRC8

245 >275

Service Space

Indoor Units 13

3. Service Space

>1000mm

>1000mm

>1000mm

>1000mm

Wiring Diagrams

14 Indoor Units

4. Wiring Diagrams

KCD-18HRFN1-QRC4 KCD-18HRFN1-QRC8 KCD-24HRFN1-QRC4 KCD-24HRFN1-QRC8
KCD-30HRFN1-QRC8 KCD-36HRFN1-QRC4 KCD-36HRFN1-QRC8

Electric Characteristics

Indoor Units 15

5. Electric Characteristics

Model

Indoor Unit

Power

Supply

Hz

Voltage

Min

Max

MFA

KCD-18HRFN1-QRC4

50

220-240

198

254

10

KCD-18HRFN1-QRC8

50

220-240

198

254

10

KCD-24HRFN1-QRC4

50

220-240

198

254

10

KCD-24HRFN1-QRC8

50

220-240

198

254

10

KCD-30HRFN1-QRC8

50

220-240

198

254

10

KCD-36HRFN1-QRC4

50

220-240

198

254

10

KCD-36HRFN1-QRC8

50

220-240

198

254

10

Notes:
MFA: Max. Fuse A mp s. (A)

Sound Levels

16 Indoor Units

6. Sound Levels

1.4m

Microphone

Model Noise Power dB(A)

Noise level dB(A)

H M L

KCD-18HRFN1-QRC4

58 49 44 40

KCD-18HRFN1-QRC8

59 49 44 39

KCD-24HRFN1-QRC4

59 50 45 42

KCD-24HRFN1-QRC8

62

50

47

42

KCD-30HRFN1-QRC8

62 52 49 46

KCD-36HRFN1-QRC4

65 53 49 46

KCD-36HRFN1-QRC8

65 52 49 46

Accessories

Indoor Units 17

7. Accessories

Name

Shape

Quantity

Installation Fittings

Installation paper boa rd

1

Tubing & Fittings

Soundproof / insulation sheath

1

Drainpipe Fittings

Out-let pipe sheath

1

Out-let pipe clasp

1

Drain joint

1

Seal ring

1

Remote controller & Its
Frame(The product you
have might not be
provided the following
accessories)

Remote controller & Its Frame

1

Remote controller holder

1

Mounting screw(ST2.9×10-C-H)

2

Remote controller manual

1

Alkaline dry batteries (AM4)

2

Others

Owner's manual

1

Installation manual

1

Installation accessory
(The product you have
might not be provided the
following accessories

Expansible hook

4

Installation hook

4

Orifice

1

The Specific ation of Power

18 Indoor Units

8. The Specification of Power

Model 18000-24000Btu/h 30000 Btu/h 36000 Btu/h 36000 Btu/h

INDOOR UNIT

POWER

Phase 1-phase 1-phase 1-phase 1-phase

Frequency and

Voltage

220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz

POWER WIRING

(mm2)

3×1.0 3×1.0 3×1.0 3×1.0

CIRCUIT BREAKER
/ Fuse (A)

15/10 15/10 15/10 15/10

OUTDOOR UNIT

POWER

Phase 1-phase 1-phase 1-phase 3-phase

Frequency and

Voltage

220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz 380-420V, 50Hz

POWER WIRING

(mm2)

3×2.5 3×2.5 3×4.0 5×2.5

CIRCUIT BREAKER
/ Fuse (A)

30/20 40/30 40/30 30/20

Indoor/Outdoor Connecting Wiring

(Weak Electric Signal) (mm2)

3×0.5 3×0.5 3×0.5 3×0.5

Indoor/Outdoor Connecting Wiring

(Strong Electric Signal) (mm2)

Field Wiring

Indoor Units 19

9. Field Wiring

Duct Ty pe

20 Indoor Units

Duct Type

1. Features ............................................................................ 21

2. Dimensions ....................................................................... 24

3. Service Space ................................................................... 25

4. Wiring Diagrams ............................................................... 26

5. Static Pressure ................................................................. 28

6. Electric Characteristics ................................................... 30

7. Sound Levels .................................................................... 31

8. Accessories ...................................................................... 32

9. The Specification of Power .............................................. 33

10. Field Wiring..................................................................... 34

Features

Indoor Units 21

1. Features

1.1 Installat io n acc es so ries: (Optional)

 Front Board, Canvas Air Passage, Filter, Panel, for eas y installation

1.2 Easy Installation: Tw o air inlet styles (Bottom side or Rear side)

 Air inlet from rear is standard for all cap acity; air inlet from bottom is optional.
 The size of air inlet frame from rear and bot to m is sa me, it’s very easy to move the cover from bottom to

rear side, or from rear to the bottom, in order to matching the installation condition.

1.3 Fresh air intake function(Optional for 18~60k)

 Install one duct from the reserved fres h-air intake to outdoor.

Continually inhale the fre sh air to i mprove the qu ality of the indoor air, fulfills air quality more healthy and
comfortable.

1.4 Easy maintenance

 Clean the filter (Optional, standar d pr oduct without filter)

It is easy to draw out the filter from the indoor unit for cleani ng, even the filter is installed in rear side or
bottom side.

Front Board

Canvas Air Passage

Filter

Panel

Air intake from rear ( Standard)

Air intake from bottom (Optional)

Features

22 Indoor Units

 Replace the motor or centrifugal fan

Remove the ventilated panel firstly. Remove a half of blower housing and take out the motor with
centrifugal fan. Directly r emov e t w o bolts, and then replace the motor or centrifugal fan e asily.

1.5 Reserved remote on -off and central control ports

 Reserved remote on-off ports and ce ntral cont rol port s, can conn ect the cab le of an on-of f contro ller or a

central controller to realize r em ot e on-off control function or group control function.

1.6 Built-in drain pump (Optional):

 Built-in drain pump can lift the water to 750mm upmost. It’s convenient to install drainage piping under

most space condition.

Motor

Blower Housing

Ventilat ed Panel

Remote on-off ports

Central control ports

Features

Indoor Units 23

1.7 Built-in display board

 The standard indoor unit can be cont r olled by wired controller.
 There is a display board with a receiver in the E-box. Move out the display, and fix it in other place, even

in the distance of 10m. The unit will realized remoter control.

 The wired controller and the display board can display the error code or produ ction code w hen the chip s

detect some failure.

1.8 Twins Com bi nation

 The units can be installed as Twin systems: one outdoor unit can connect with two indoor units. The

indoor units can be comb i ned in any of the different available ratings.

Display

750mm upmost

Wired Controller (Standard)

Remote Controller (Optio nal)

Dimensions

24 Indoor Units

2. Dimensions

H

G

E

F
A

B

D

C

L

M

Capacity

(KBtu)

Outline dimension(mm) Air outlet opening size Air return opening size

Size of outline

dimension mounted

plug

A B C D E F G H I J K L M

12

700

210

635

570

65

493

35

119

595

200

80

740

350

18/24

920

270

635

570

65

713

35

179

815

260

20

960

350

30/36

1140

270

775

710

65

933

35

179

1035

260

20

1180

490

Service Space

Indoor Units 25

3. Service Sp ace

Ensure enough space r equired for installation and maintenance.

All the indoor units reserve the hole to joint the fresh air pipe. The hole size as following:

Wiring Diagrams

26 Indoor Units

4. Wiring Diagrams

KTBU-12HWFN1-QRC8

KTB-18HWFN1-QRC4 KTB-18HWFN1-QRC8(A) KTB-24HWFN1-QRC8 KTB-30HWFN1-QRC8
KTB-36HWFN1-QRC4 KTB-36HWFN1-QRC8(A)

Wiring Diagrams

Indoor Units 27

KTB-24HWDN1-QRC4

Static Pressure

28 Indoor Units

5. Static Pressure

12,000Btu/h 18,000Btu/h

Super high speed

0

900

600

500

Mid speed

High speed

External static pressure (Pa)

3

Air volume(m /h)

Pa

90

80

70

60

50

40

30

20

10

Low speed

300 400

700

800

Super high speed

500

400300

200

Low speed

10

20

30

40

50

60

70

80

90

Pa

600 700 800 900 1000 1100

Air volume(m

/h)

3

External static pressure (Pa)

High speed

Mid speed

1200

24,000Btu/h 30,000Btu/h

Super high speed

14001300

Low speed

10

20

30

40

50

60

70

80

90

Pa

800 900 1000 1100

Air volume(m

/h)

3

External static pressure (Pa)

High speed

Mid speed

1200

1500

700

Static Pressure

Indoor Units 29

36,000Btu/h

2400

2200

16001400

Low speed

10

20

30

40

50

60

70

80

90

1100

Air volume(m

/h)

3

External static pressure (Pa)

High speed

Mid speed

1200

1800

2000

Super high speed

Pa

Electric Characteristics

30 Indoor Units

6. Electric Characteristics

Model

Indoor Unit

Power S upply

Hz Voltage Min. Max. MFA

KTBU-12HWFN1-QRC8 50 220-240 198 254 16

KTB-18HWFN1-QRC4 50 220-240 198 254 10

KTB-18HWFN1-QRC8(A) 50 220-240 198 254 10

KTB-24HWDN1-QRC4 50 220-240 198 254 10

KTB-24HWFN1-QRC8

50

220-240

198

254

10

KTB-30HWFN1-QRC8 50 220-240 198 254 10
KTB-36HWFN1-QRC4 50 220-240 198 254 10

KTB-36HWFN1-QRC8(A) 50 220-240 198 254 10

Note:

MFA: Max. Fuse Amps. (A)

Sound Levels

Indoor Units 31

7. Sound Levels

Suction

Discharge

Microphone

1.4m

Concealed Duct Type

DuctDuct

Model

Sound Power

dB(A)

Noise level dB(A)

H M L

KTBU-12HWFN1-QRC8 59 41 38 36

KTB-18HWFN1-QRC4 59 46 43 41

KTB-18HWFN1-QRC8(A) 59 45 42 40

KTB-24HWDN1-QRC4 58 43 38 32

KTB-24HWFN1-QRC8 63 46 42 39
KTB-30HWFN1-QRC8 65 50 46 41

KTB-36HWFN1-QRC4

65

52

49

42

KTB-36HWFN1-QRC8(A) 62 46 43 40

Accessories

32 Indoor Units

8. Accessories

Name Shape Quantity

Tubing & Fittings

Soundproof / insulation sheath

2

Binding tape

1

Seal sponge

1

Drainpipe Fittings
(for cooling & heating)

Drain joint

1

Seal ring

1

Wired controller & Its Frame

Wired controller

1

Others

Owner，s manual

1

Installation manual

1

EMS & It’s fitting

Magnetic ring (twist the electric wires L
and N around it to five circles)

1

The Specification of Power

Indoor Units 33

9. The Specification of Power

Model 12000 Btu/h

18000-24000Bt

u/h

30000 Btu/h 36000 Btu/h 36000 Btu/h

INDOOR

UNIT

POWER

Phase

1-phase 1-phase 1-phase 1-phase

Frequency and
Voltage

220-240V,

50Hz

220-240V,

50Hz

220-240V,

50Hz

220-240V,

50Hz

POWER
WIRING (mm2)

3×1.0 3×1.0 3×1.0 3×1.0

CIRCUIT

BREAKER/

Fuse (A)

15/10 15/10 15/10 15/10

OUTDOOR

UNIT

POWER

Phase 1-phase 1-phase 1-phase 1-phase 3-phase

Frequency and
Voltage

220-240V,

50Hz

220-240V,

50Hz

220-240V,

50Hz

220-240V,

50Hz

380-420V,

50Hz

POWER
WIRING (mm2)

3×1.5 3×2.5 3×2.5 3×4.0 5×2.5

CIRCUIT

BREAKER/

Fuse (A)

20/16 30/20 40/30 40/30 30/20

Indoor/Outdoor Connecting
Wiring(Weak Electric Signal)
(mm2)

3×0.5 3×0.5 3×0.5 3×0.5

Indoor/Outdoor Connecting

Wiring(Strong Electric Signal)

(mm2)

4×1.0

Field Wiring

34 Indoor Units

10. Field Wiring

KTBU-12HWFN1-QRC8

KTB-18HWFN1-QRC4 、 KTB-18HWFN1-QRC8(A) 、 KTB-24HWDN1-QRC4、 KTB-24HWFN1-QRC8 、
KTB-30HWFN1-QRC8、KTB-36HWFN1-QRC4、KTB-36HWFN1-QRC8(A)

Ceiling & Floor Type

Indoor Units 35

Ceiling & Floor Type

1. Features ...................................................................... 36

2. Dimensions ................................................................. 37

3. Service Space ............................................................. 38

4. Wiring Diagrams ........................................................ 39

5. Electric Characteristics ............................................. 41

6. Sound Levels .............................................................. 41

7. Accessor ies ................................................................ 42

8. The Speci fication of Power ....................................... 42

9. Field Wiring ................................................................ 43

Features

36 Indoor Units

1. Features

1.1. New design, more modern and elegant appe ar ance.

1.2.

1.2. Convenient installation

--The ceiling type can be easily installed into a corner of the ceiling even if the ceiling is very nar r ow

--It is especially useful when installation of an air conditioner in the center of the ceiling is impossible
due to a structure such as one lighti ng.

1.3. Two direction auto swing (v er t i cal & hori zontal) and wide angle air flow,

--Air flow directional control minimizes the air resistance and produces wilder air flow to vertical
direction.

--The range of horizontal air discharge is widened which secures wider air flow distribution to provi de
more comfortable air cir culation no matter where the unit is set up

1.4. Three level fan speed, more humanism de sign, meets different air-supply requirement.

1.5. New foam drain pan with plastic-s praying inner surface

1.6. Easy operation.

1.7. Remote control and optional wired control method.

Dimensions

Indoor Units 37

2. Dimensions

Capacity (Btu/h)

A B C D E
18K, 24K 1068 675 235 983 220
30K, 36K 1285 675 235 1200 220

Service Space

38 Indoor Units

3. Service Space

Wiring Diagrams

Indoor Units 39

4. Wiring Diagrams

KUE-18HRFN1-QRC8 KUE-24HRFN1-QRC8 KUE-30HRFN1-QRC8 KUE-36HRFN1-QRC4

KUE-18HRDN1-QRC4 KUE-24HRDN1-QRC4

Wiring Diagrams

40 Indoor Units

KUE-36HRFN1-QRC8(A)

Electric Characteristics

Indoor Units 41

5. Electric Characteristics

Model

Indoor Units

Power Supply

Hz Voltage Min. Max. MFA

KUE-18HRDN1-QRC4 50 220-240 198 254 10

KUE-18HRFN1-QRC8 50 220-240 198 254 10

KUE-24HRDN1-QRC4 50 220-240 198 254 10

KUE-24HRFN1-QRC8 50 220-240 198 254 10
KUE-30HRFN1-QRC8 50 220-240 198 254 10
KUE-36HRFN1-QRC4 50 220-240 198 254 10

KUE-36HRFN1-QRC8(A) 50 220-240 198 254 10

Note:

MFA: Max. Fuse Amps. (A)

6. Sound Levels

Microphone

1m

1m

Air outlet side

1.5m

1m

Microphone

Ceiling Floor

Model

Sound Power

dB (A)

Noise level dB(A)

H M L

KUE-18HRDN1-QRC4 56 43 41 36

KUE-18HRFN1-QRC8 60 46 43 40

KUE-24HRDN1-QRC4 62 53 49 45

KUE-24HRFN1-QRC8 63 55 53 49
KUE-30HRFN1-QRC8 64 55 50 46

KUE-36HRFN1-QRC4

63

55

50

46

KUE-36HRFN1-QRC8(A) 65 55 50 45

Accessories

42 Indoor Units

7. Accessories

Name

Shape

Quantity

Remote controller & Its
holder(The product you
have might not be
provided the following
accessories)

1. Remote controller

1

2. Remote controller holder

1

3. Mounting screw (ST2.9×10-C-H)

2

4. Alkaline dry batteries (AM4)

2

Others

5. Owner's manual

1

6. Installation manual

1

7. Remote controller manual

1

8. The Specificati on of Power

Model 18000-24000Btu/h 30000 Btu/h 36000 Btu/h 36000 Btu/h

INDOOR UNIT

POWER

Phase 1-phase 1-phase 1-phase 1-phase

Frequency and

Voltage

220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz

POWER WIRING

(mm2)

3×1.0 3×1.0 3×1.0 3×1.0

CIRCUIT BREAKER
/ Fuse (A)

15/10 15/10 15/10 15/10

OUTDOOR UNIT

POWER

Phase 1-phase 1-phase 1-phase 3-phase

Frequency and

Voltage

220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz 380-420V, 50Hz

POWER WIRING

(mm2)

3×2.5 3×2.5 3×4.0 5×2.5

CIRCUIT BREAKER
/ Fuse (A)

30/20 40/30 40/30 30/20

Indoor/Outdoor Connecting Wiring

(Weak Electric Signal) (mm2)

3×0.5 3×0.5 3×0.5 3×0.5

Indoor/Outdoor Connecting Wiring

(Strong Electric Signal) (mm2)

Indoor Units 43

9. Field Wiring

44 Indoor Units

New Four-way Cassette Type (Compact)

1. Features ............................................................................................... 45

2. Dimensions .......................................................................................... 46

3. Service Space ...................................................................................... 47

4. Wiring Diagrams .................................................................................. 48

5. Air Velocity and Temperature Distributions(Reference Data) .......... 49

6. Electric Characteristic s ...................................................................... 50

7. Sound Levels ....................................................................................... 50

8. Accessor ies ......................................................................................... 51

9. The Specification of Pow er ................................................................. 51

10. Field Wiring ........................................................................................ 52

Features

Indoor Units 45

1. Features

1.1 New panel

 360°surrounding air outlet design, affords comfortable feeling

1.2 Compact design

 The body size is 570×260×570mm, it’s just smaller than the ceiling board, so it’s very easy for

installation and will not damage the decoration. The panel size is 647×50×647mm.

 The hooks are designed in the four corners of the body, which can save installation space.

1.3 Electric control box built-in design

 The E-box is simply and safely built inside the indoor unit. It’s convenient for installation and

maintenance. Can check the control part easi ly, you only need to open the air retur n gr i lle.

1.4 Air passage function

 Reserves the space for air outlet from the side of indoor unit; It’s availed to connect air duct
from the two sides to the nearby sm al l rooms.

Dimensions

46 Indoor Units

2. Dimensions

Service Space

Indoor Units 47

3. Service Space

Wiring Diagrams

48 Indoor Units

4. Wiring Diagrams

KCA2U-12HRFN1-QRC8

KCA2-18HRFN1-QRC8

Air Velocity and Temperature Distributions(Reference Data)

Indoor Units 49

5. Air Velocity and Temperature Distributions(Reference Data)

Airflow velocity

Temperature

Electric Characteristics

50 Indoor Units

6. Electric Characteristics

Model

Indoor Units Power Supply

Hz Voltage Min. Max. MFA

KCA2U-12HRFN1-QRC8 50 220-240 198 254 20

KCA2-18HRFN1-QRC8 50 220-240 198 254 20

Notes:

MFA: Max. Fuse A mp s. (A)

7. Sound Levels

1.4m

Microphone

Model Noise Power dB(A)

Noise level dB(A)

H M L

KCA2U-12HRFN1-QRC8 54 47 45 41

KCA2-18HRFN1-QRC8

59 47 45 40

Accessories

Indoor Units 51

8. Accessories

Name

Shape

Quantity

Installation Fittings

Installation paper boa rd

1

Tubing & Fittings

Soundproof / insulation sheath

1

Drainpipe Fittings

Out-let pipe sheath

1

Out-let pipe clasp

1

Drain joint

1

Seal ring

1

Remote controller & Its
Frame(The product you
have might not be
provided the following
accessories)

Remote controller & Its Frame

1

Remote controller holder

1

Mounting screw(ST2.9×10-C-H)

2

Remote controller manual

1

Alkaline dry batteries (AM4)

2

Others

Owner's manual

1

Installation manual

1

Installation accessory
(The product you have
might not be provided the
following accessories

Expansible hook

4

Installation hook

4

Orifice

1

9. The Specification of Power

MODEL 12000 Btu/h 18000 Btu/h

Power

Phase 1-phase 1-phase

Frequency and Voltage 220-240V, 50Hz 220-240V, 50Hz

Circuit Breaker/ Fuse (A) 25/20 25/20

Indoor Unit Power Wiring (mm2)

3x1.0

Indoor/Outdoor Connecting Wiring

(mm2)

Ground Wiring

2.5 2.5

Outdoor Unit Power

Wiring

3×2.5 3×2.5

Strong Electric Signal 4×1.0

Weak Electric Signal

3×0.5

52 Indoor Units

10. Field Wiring

KCA2U-12HRFN1-QRC8

KCA2-18HRFN1-QRC8

Console T y pe

Console T y pe 53

Console Type

1. Features ............................................................................................... 55

2. Dimensions .......................................................................................... 57

3. Service Space ...................................................................................... 58

4. Wiring Diagrams .................................................................................. 59

5. Air Velocity and Temperature Distributions(Reference Data) .......... 60

6. Electric Char acteristics ...................................................................... 61

7. Sound Levels ....................................................................................... 62

8. Accessor ies ......................................................................................... 63

9. The Specification of Pow er ................................................................. 63

10. Field Wiring ........................................................................................ 64

Features

Console T y pe 55

1. Features

1.1. Modern and elegant appeara nce

 The simple and stylish designs can nicely harmonies with your living space.

1.2. Four panels opti o na l

1.3. Two air-outlet ways
Cooling mode

Quick Cooling To maintain room te mp

 Air outlet from top and bottom to make quick cooling ------When the A/C is just switched on, or room

temp. is still high, cold air will be bl ow n out from top and bottom air outlet to cool down the room quickly

 Air outlet from top to maintain room temp. ----When the room has been cooled down, or the A/C has

been opened over 1 hour, cold air only from the top outlet to keep constant room temp

Heating mode

 Anti-cold air ------When the AC is just turn on, temperature of evaporator is very low, in this case, in

order to prevent cold air direct blowing, onl y the upper louver is opened in a high position, the lower
louver closed.

Console Type

56 C on sol e Type

1.4. Four air inlets

1.5. Low noise

 DC indoor fan motor, w hich has five speeds.
 Low noise and energy saving.

 Advanced centrifugal fan technology ma kes a f ast airflow and reduces the indoor noise lower to 28dB.

1.6. Golden fin is optional.

1.7. Activ e carbon fi lter is standard

Dimensions

Console T y pe 57

2. Dimensions

KFAU-12HRFN1-QRC8、KFA-16HRFN1-QRC8

Service Space

58 C on sol e Type

3. Service Space

Wiring Diagrams

Console T y pe 59

4. Wiring Diagrams

KFAU-12HRFN1-QRC8

KFA-16HRFN1-QRC8

Air Velocity and Temperature Distributions(Reference Data)

60 C on sol e Type

5. Air Velocity and Temperatur e Dist ributions(Reference Data)

Discharge angle 60

Airflow velocity

Temperature

Electric Characteristics

Console T y pe 61

6. Electric Characteristics

Model

Indoor Units

Power Supply

Hz Voltage Min. Max. MFA

KFAU-12HRFN1-QRC8 50 220-240 198 254 16

KFA-16HRFN1-QRC8 50 220-240 198 254 16

Sound Levels

62 C on sol e Type

7. Sound Levels

1.5m

1m

Microphone

Model

Noise Power

dB(A)

Noise level dB(A)

Higher H M L

KFAU-12HRFN1-QRC8 57 47 44 40 37

KFA-16HRFN1-QRC8 59 48 47 44 40

Accessories

Console T y pe 63

8. Accessories

Name

Shape

Quantity

Installation fittings Hook

2

Remote controller & Its Frame

Remote contr oller

1

Frame

1

Mounting screw(ST2. 9×10-C-H)

2

Alkaline dry batteries (AM4)

2

Others

Installation manual

/

1

Owner's manual

/

1

9. The Specification of Power

MODEL 12000 Btu/h 18000 Btu/h

Power

Phase 1-phase 1-phase

Frequency and Voltage 220-240V, 50Hz 220-240V, 50Hz

Circuit Breaker/ Fuse (A) 20/16 20/16

Indoor Unit Power Wiring (mm2)

3x1.0

Indoor/Outdoor Connecting Wiring

(mm2)

Ground Wiring 1.5 2.5

Outdoor Unit Power

Wiring

3×1.5 3×2.5

Strong Electric Signal 4×1.0

Weak Electric Signal

3×0.5

Field Wiring

64 C on sol e Type

10. Field Wiring

KFAU-12HRFN1-QRC8

KFA-16HRFN1-QRC8

Outdoor Units

Outdoor Units 65

Part 3

Outdoor Units

1. Dimensions ................................................................................................. 66

2. Service Space ............................................................................................. 68

3. Piping Diagrams ......................................................................................... 69

4. Wiri ng Diagrams ......................................................................................... 70

5. Ele ctri c Characteristics .............................................................................. 74

6. Operation Limits ......................................................................................... 75

7. Sound Le vel s .............................................................................................. 76

Dimensions

66 Outdoor Units

1. Dimensions

Model

Unit：mm

A B C D E F H

KOU-12HFN1-QRC8 760 530 290 315 270 285 590
KOU-18HFN1-QRC4 845 560 335 360 312 320 700
KOU-18HFN1-QRC8 845 560 335 360 312 320 700
KOU-24HFN1-QRC4 900 590 333 355 302 315 860
KOU-24HFN1-QRC8 900 590 333 355 302 315 860

KOU-30HFN1-QRC8

900

590

333

355

302

315

860

KOU-36HFN1-QRC4 990 624 366 396 340 345 965
KOU-36HFN1-RRC4 990 624 366 396 340 345 965

KOU-36HFN1-RRC8(520)

990

624

366

396

340

345

965

KOU-36HFN1-QRC8(520)

990 624 366 396 340 345 965

Dimensions

Outdoor Units 67

Model

Unit：mm

A B C D E F H

KOU-36HFN1-QRC8(5A0)

938 633.5 404 448 370 392 1369

KOU-36HFN1-RRC8(5A0)

938

633.5

404

448

370

392

1369

Service Space

68 Outdoor Units

2. Service Space

More than 60cm

More than 30cm

More than 60cm

More than 200cm

Air inlet

Air inlet

More than 30cm

Air outlet

(Wall or obstacle)

Maintain channel

Piping Diagrams

Outdoor Units 69

3. Piping Diagrams

KOU-12HFN1-QRC8 KOU-18HFN1-QRC4 KOU-18HFN1-QRC8 KOU-24HFN1-QRC4
KOU-24HFN1-QRC8 KOU-30HFN1-QRC8

LIQUID SIDE

GAS SIDE

HEAT
EXCHANGE
(EVAPORATOR)

HEAT
EXCHANGE
(CONDENSER)

Compressor

2-WAY VALVE

3-WAY VALVE

4-WAY VALVE

COOLING
HEATING

T2B Evaporator
temp. sensor
outlet

T1 Room temp.
sensor

T3 Condenser
temp. sensor

T5 Discharge
temp. sensor

High pressure
switch

T4 Ambient
temp. sensor

Low pressure
switch

INDOOR OUTDOOR

T2 Evaporator
temp. sensor
middle

Accumulator

Electronic
expansion valve

CAPILIARY TUBE

KOU-36HFN1-QRC4 KOU-36HFN1-RRC4 KOU-36HFN1-QRC8 KOU-36HFN1-RRC8

LIQUID SIDE

GAS SIDE

HEAT
EXCHANGE
(EVAPORATOR)

HEAT
EXCHANGE
(CONDENSER)

Compressor

2-WAY VALVE

3-WAY VALVE

4-WAY VALVE

COOLING
HEATING

T2B Evaporator
temp. sensor
outlet

T1 Room temp.
sensor

T3 Condenser

temp. sensor

Accumulator

T5 Discharge temp. sensor

High pressure switch

T4 Ambient
temp. sensor

Low pressure
switch

INDOOR OUTDOOR

Oil return Capillary

Oil separator

T2 Evaporator
temp. sensor
middle

Electronic
expansion valve

CAPILIARY TUBE

Wiring Diagrams

70 Outdoor Units

4. Wiring Diagrams

KOU-12HFN1-QRC8

Wiring Diagrams

Outdoor Units 71

KOU-18HFN1-QRC4 MOU-18HFN1-QRC8 KOU-24HFN1-QRC4 KOU-24HFN1-QRC8
KOU-30HFN1-QRC8

KOU-36HFN1-QRC4 KOU-36HFN1-QRC8(520)

Wiring Diagrams

72 Outdoor Units

KOU-36HFN1-RRC4 KOU-36HFN1-RRC8(520)

KOU-36HFN1-QRC8(5A0)

Wiring Diagrams

Outdoor Units 73

KOU-36HFN1-RRC8(5A0)

Electric Characteristics

74 Outdoor Units

5. Electric Characteristics

Model

Outdoor Unit

Hz Voltage Min. Max.
KOU-12HFN1-QRC8 50 220-240V 198V 254V
KOU-18HFN1-QRC4

50 220-240V 198V 254V

KOU-18HFN1-QRC8

50 220-240V 198V 254V

KOU-24HFN1-QRC4

50 220-240V 198V 254V

KOU-24HFN1-QRC8

50 220-240V 198V 254V

KOU-30HFN1-QRC8

50 220-240V 198V 254V

KOU-36HFN1-QRC4

50 220-240V 198V 254V

KOU-36HFN1-RRC4

50 380-415V 342V 440V

KOU-36HFN1-QRC8

50 220-240V 198V 254V

KOU-36HFN1-RRC8

50 380-415V 342V 440V

Operation Limits

Outdoor Units 75

6. Operation Limits

Temperature

Mode

Cooling operation Heating operation

Room temperature

≥17℃ ≤30℃

Outdoor temperature

-15℃～50℃ -15℃～24℃

CAUTION:

1. If the air conditioner is used beyond the above conditions, certain safety protection features may come
into operation and cause the unit to operate abnormally.

2. The room relative humidity should be less than 80%. If the air conditio ner operates beyond this figure, the
surface of the air con dition er m ay at tr act cond ensat ion. Plea se s et t he ver tica l air flow louv er t o it s ma ximum
angle (vertically to the floor) , and s et HIG H f an mode.

3. The optimum performance will be achieved during this operating tem per at ure zone.

Sound Levels

76 Outdoor Units

7. Sound Levels

H

1.0m

Outdoor Unit

Microphone

Note: H= 0.5 × height of outdoor unit

Model Noise Power dB(A) Noise level dB(A)

KOU-12HFN1-QRC8 61 58

KOU-18HFN1-QRC4

65

61

KOU-18HFN1-QRC8 65 60
KOU-24HFN1-QRC4 67 64
KOU-24HFN1-QRC8 69 60
KOU-30HFN1-QRC8 70 61
KOU-36HFN1-QRC4 69 65

KOU-36HFN1-RRC4 70 65
KOU-36HFN1-QRC8(5A0) 69 64
KOU-36HFN1-QRC8(520) 70 64
KOU-36HFN1-RRC8(5A0) 67 63

KOU-36HFN1-RRC8(520)

70

63

Installation

Installation 77

Part 4

Installation

1. Installation Procedure .................................................... 78

2. Location selection .......................................................... 79

3. Indoor unit installation ................................................... 80

4. O utdoor unit installation ( Side Dis c harge Unit) ............ 94

5. Refrigerant pipe installation ........................................... 95

6. Drainage pipe installation .............................................. 99

7. Vacuum Drying and Leakage Checking ...................... 103

8. Additional refrigerant charge ....................................... 104

9. E ngineering of insulation ............................................. 105

10. Engineering of electrical wiri ng ................................... 107

11. Test operation ............................................................... 108

Installation Procedure

78 Installation

1. Installation Procedure

Vacuum drying and leakage checking

Additional refrigerant charge

Insulation the joint part of refri gerant pipe

Wiring connection and ele ct r ic safety checking

Test operation

Refrigerant pipe

installation and insulation

Drainage pipe install at ion

and insulation

Indoor unit installation

location selection

Outdoor unit installation

location selection

Indoor unit installation

Outdoor unit inst al lation

Refrigerant pipe

installation and insulation

Drainage pipe install at ion

and insulation

Locatio n selection

Installation 79

2. Location selection

2.1 Indoor unit location selection

 The place shall easily s upport the indoor unit’s weight.
 The place can ensure the indoor unit installation and inspection.
 The place can ensure the indoor unit horizontally installed.
 The place shall allow easy water drainage.
 The place shall easily c onnect with the outdoor unit.
 The place where air circulation in the room should be good.
 There should not be any heat s our ce or st eam near the unit.
 There should not be any oil ga s near t he unit
 There should not be any corrosive gas n ear t he unit
 There should not be any salty air neat the unit
 There should not be strong electromagnetic wave near the unit
 There should not be inflammable materials or gas near the unit
 There should not be str ong voltage vibration.

2.2 Outdoor unit location selection

 The place shall easily s upport the outdoor unit’s weight.
 Locate the outdo or unit as close to indoor unit as possible
 The piping length and height dr op can not exceed the allowable value.
 The place where the nois e, vibration and outlet air do not disturb the neighbors.
 There is enough roo m for installation and maintenance.
 The air outlet and the air i nlet are not impeded, and not face the strong wind.
 It is easy to install t he connecting pipes and cables.
 There is no danger of fire due t o leakage of inflammable gas.
 It should be a dry and well ventilation place
 The support should be flat and horizontal
 Do not install the outdoor unit in a dirty or severely polluted place, so as to avoid blockage of the heat

exchanger in the outdoor unit.

 If is built over the u nit to prev ent direct s unlight, rain expos ure, direct strong w end, snow and oth er scrap s

accumulation, make sure that heat radiation from the condenser is not restricted.

More than 30cm

More than 60cm

More than 200cm

More than 30cm

More than 60cm
(Service space)

Fence or

obstacles

Indoor unit installation

80 Installation

3. Indoor unit installation

3.1 Super slim cassette indoor unit installation

3.1.1 Service space for indoor unit

Model

A

H

Remark

18-30

205

>235

R410A and R22

Cooling / Cooling & Heating

36

245

>275

R410A and R22

Cooling / Cooling & Heating

3.1.2 Bolt pitch

3.1.3 Install the p e ndant bolt

Select the position of installation hooks according to the hook holes positions showed in upper picture.

Indoor unit installation

Installation 81

Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the
expansible hooks (fittings).

3.1.4 Install the main bo dy

Make the 4 suspender through the 4 hanger of the main body to suspend it. Adjust the hexangular nuts on
the four installation h ooks evenly, to ensure the balance of the body. Use a leveling instrument to make sure
the levelness of the main body is within ±1°.

Adjust the position to ensure the gaps between the body and the four sides of ceili ng are even. The body's
lower part should sink into the ceiling for 10~12 mm. In general, L is half of the screw length of the
installation hook.

Locate the air conditioner fir m ly by wrenching the nuts after having adjuste d t he body's position well.

Indoor unit installation

82 Installation

3.1.5 Install the panel

Remove the grille

Remove the 4 corner covers.

Hang the panel to the hooks on the main body. If the panel is with a uto-l ift grille, pleas e wat ch the ropes lifin g
the grille, DO NOT ma ke t he r opes enwinded or blocked.

Indoor unit installation

Installation 83

Tighten the screws under the panel hooks till the panel closely stick on the ceiling to avoid condensate
water.

Hang the air-in grill to the panel, then connect the lead terminator of the swing motor and that of the control
box with corresponding te r m inat or s on the body respectively.

Install the 4 corner cov er s back.

Note: The panel s hal l be installed after the wiring connected.

Indoor unit installation

84 Installation

3.2 A5 duct indoor unit installation

3.2.1 Service space for indoor unit

3.2.2 Bolt pitch

Capacity(KBtu)

Size of outline dimension mounted plug

L M

12

740

350

18/24 960 350
30/36 1180 490

3.2.3 Install the pendant bolt

Select the position of installation hooks according to the hook holes positions showed in upper picture.
Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the
expansible hooks (fittings).

Indoor unit installation

Installation 85

3.2.4 Install the m ain body

Make the 4 suspender through the 4 hanger of the mai n body to suspend it. Adjust the hexangular nuts on
the four installation hooks evenly, to ensure the balance of the body . Use a leveling instrume nt t o ma ke sure
the levelness of the main body is within ±1°.

3.2.5 Install the air filter

Insert the air filter through t he fi lter slot and fix it with 2 screws.

3.2.6 Install the air duct

Please design the air duct as below recommended picture

Indoor unit installation

86 Installation

3.2.7 Change the air inlet dir ect i on

① Take off ventilation panel and f lange, cut off the staples at side rail.

② Stick the attached seal sponge as per the indicating place in the following fig, and then change the

mounting positions of air ret ur n panel and air return flange .

③ When install the filter mesh, pl ease plug it into flange inclined from air return opening, and then push up.

④ The installation has finish, upon filter mesh which fixing blocks have been insert to the flange positional

holes.

Indoor unit installation

Installation 87

3.3 Ceiling & floor indoor unit installation

3.3.1 Service space for indoor unit

3.3.2 Bolt pitch

① Ceiling installation

Capacity (Btu/h)

D E

18K, 24K 983 220

36K 1200 220

② Wall-mounted installati on

3.3.3 Install the pendant bolt

Indoor unit installation

88 Installation

① Ceiling installation
Select the position of installation hooks according to the hook holes positions showed in upper picture.
Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the
expansible hooks (fittings).

② Wall-mounted installati on
Install the tappin g s cr ew s onto the wall.(Refer to picture below)

3.3.4 Install the m ain body

① Ceiling installation (Th e only installation method for the unit with drain pump)
Remove the side board and the gr i ll e.

Locate the hanging arm on t he hanging screw bolt. Prepare the mounting bolts on the unit.

Indoor unit installation

Installation 89

Put the side panels and gril les back.

② Wall-mounted installat ion
Hang the indoor unit by insert the tapping screws into the hanging arms on the main unit. (The bottom of
body can touch with floor or suspended, but the body must install vertically.)

Indoor unit installation

90 Installation

3.4 Compact cassette indoor unit installation

3.4.1 Service space for indoor unit

3.4.2 Bolt pitch

3.4.3 Install the p e ndant bolt

Select the position of installation hooks according to the hook holes positions showed in upper picture.
Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the
expansible hooks (fittings).

Indoor unit installation

Installation 91

Face the concave side of the installation hooks toward the expansible hooks. Determine the length of the
installation hooks fr om the height of ceiling, t hen cut off the unnecessary part.
If the ceiling is extremely high, please determine the length of the installation hook depending on the real
situation.

3.4.4 Install the main bo dy

Make the 4 suspender through the 4 hanger of the mai n body to suspend it. Adjust the hexangular nuts on
the four installation hooks evenly, to ensure the balance of the body. Use a leveling instrume nt t o ma ke sure
the levelness of the main body is within ±1°.

Adjust the position to ensure the gaps between the body and the four sides of ceiling are even. The body's
lower part should sink into the ceiling for 10~12 mm. In general, L is half of the screw length of the
installation hook.

Locate the air conditioner fir m ly by wrenching the nuts after having adjuste d t he body's position well.

3.4.5 Install the panel

Remove the grille

Indoor unit installation

92 Installation

Hang the panel to the hoo ks on t he mainbody.

Tighten the screws under the panel hooks till the panel closely stick on the ceiling to avoid condensate
water.

Hang the air-in grill to the panel, then connect the lead terminator of the swing motor and that of the control
box with corresponding te r m inator s on the body respectively.

Note: The panel s hal l be installed after the wiring co nnected.

Indoor unit installation

Installation 93

3.5 Console indoor unit installation

3.5.1 Service space for indoor unit

3.5.2 Install the main body

 Fix the hook with tapping screw onto the wall

 Hang the indoor unit on the hook.

(The bottom of body can touch wit h floor or suspended, but t he body must install vertically.)

Outdoor unit installation (Side Discharge Unit)

94 Installation

4. Outdoor unit installation (Side Discharge Unit)

4.1 Service space for outdoor unit

More than 60cm

More than 30cm

More than 60cm

More than 200cm

Air inlet

Air inlet

More than 30cm

Air outlet

(Wall or obstacle)

Maintain channel

4.2 Bolt pitch

Model

B C D

KOU-12HFN1-QRC8

530

290

315

KOU-18HFN1-QRC4
KOU-18HFN1-QRC8

560 335 360

KOU-24HFN1-QRC4

KOU-24HFN1-QRC8

KOU-30HFN1-QRC8

590 333 355

KOU-36HFN1-QRC4

KOU-36HFN1-RRC4

KOU-36HFN1-QRC8(520)

KOU-36HFN1-RRC8(520)

624 366 396

KOU-36HFN1-QRC8(5A0)
KOU-36HFN1-RRC8(5A0)

633.5 404 448

4.3 Install the Unit

Since the gravity center of the unit is not at its p hysical ce nter, so please be careful when lift ing it with a sli ng.
Never hold the inlet of the outdoor unit to prevent it from deforming.
Do not touch the fan with hands or ot her objects.
Do not lean it more than 45, and do not l ay it sidelong.
Make concrete foundation according to the specifications of the outdoor units.
Fasten the feet of this unit with bolt s f irmly t o prev ent it from collap s ing in ca se of earthqu a ke or strong w ind.

Refrigerant pipe installat ion

Installation 95

5. Refrigerant pipe installation

5.1 Maximum pipe length and height drop

Considering the allowable pipe length and height drop to decide the installation position. Make sure the
distance and height dr op bet ween indoor and outdoor unit not exceeded the date in the f ollowing table.

Model Max. Length Max. Elevation
12,000Btu/h 25m 10m
18,000Btu/h 30m 20m

24,000Btu/h~30,000Btu/h 50m 25m

36,000Btu/h ~60,000Btu/h 65m 30m

5.2 The procedure of connecting pipes

5.2.1 Choose the pipe size according to the specification table.

5.2.2 Confirm the cross way of t he pipes.

5.2.3 Measure the necessary pipe length.

5.2.4 Cut the selected pipe wit h pipe cutter

 Make the section flat and smooth.

90

Lean

Crude

Burr

o

5.2.5 Insulate the copper pipe

 Before test operation, the joint parts should not be heat insulate d.

5.2.6 Flare the pipe

 Insert a flare nut into the pipe before flaring the pipe
 According to the following table to flare the p ipe

Refrigerant pipe installat ion

96 Installation

Pipe diameter

Flare dimension A (mm)

Flare shape

Min Max

1/4" (6.35) 8.3 8.7

R0.4~0.8

A

45

¡ã

90°

4

-

+

3/8" (9.52) 12.0 12.4

1/2" (12.7) 15.4 15.8

5/8" (15.9) 18.6 19.1

3/4" (19) 22.9 23.3

 After flared the pipe, the opening part must be seal by end cover or adhesive tape to avoid duct or

exogenous impurity come into the pipe.

5.2.7 Drill holes if the pipes need to pass the wall .

5.2.8 According to the field c on di t i on to bend the pipes so that it can pass the wall smo othl y.

5.2.9 Bind and wrap th e wire together with the in sul ated pipe if necessary .

5.2.10 Set the wall conduit

5.2.11 Set the suppor ter for the pipe.

5.2.12 Locate the pipe and fix it by supporter

 For horizontal refrigerant pipe, the distance between supporters should not be exceed 1m.
 For vertical refrigerant pipe, the distance between supporters should not be exceed 1.5m.

5.2.13 Connect the pipe to indoor unit and outdoor unit by using two spanners.

 Be sure to use two spanners and proper torque to fasten the nut, too large torque will damage the

bellmouthing, and too small torque may cause leakage. Refer the following table for different pipe
connection.

Pipe Diameter

Torque Sketch map

(kgf.cm) (N.cm)
1/4" (6.35) 144~176 1420~1720
3/8" (9.52) 333~407 3270~3990
1/2" (12.7) 504~616 4950~6030
5/8" (15.9) 630~770 6180~7540

3/4" (19) 990~1210 9270~11860

5.3 For Units with Twins Function

5.3.1 Length and drop hei ght permitted of the refrigerant piping
Note: Reduced length of the branching tube is the 0.5m of the equivalent length of the pipe.