AUX AL-H12/4R1D, AL-H12/4R1DU, AL-H18/4R1D, AL-H18/4R1DU, ALCa-H12A4/R1C7-B7 Service Manual

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

1

Service Manual

Light Commercial Air Conditioners

(T1 , 50Hz , R410a , ON/OFF)

Version:01 2017/01

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

2

Content

Part 1. General information ............................................................ 3

Part 2. Indoor unit ............................................................................ 6

Part 3 Universal outdoor unit ....................................................... 83

Part 4 Trouble shooting ............................................................... 116

Part 5 Controller .......................................................................... 146

Part 6. Sensor resistance table .................................................. 155

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

3

Part 1. General information

1.Nomenclature .................................................................................... 4

2.Unit appearance ................................................................................ 5

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

4

1.Nomenclature

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

5

2.Unitappearance

Series

Picture of the indoor unit

Four-way

Cassette

12k Btu/h

18k Btu/h

24k Btu/h

36k Btu/h

48k Btu/h

60k Btu/h

Ceiling &Floor

18k Btu/h

24k Btu/h

36k Btu/h

48k Btu/h

60k Btu/h

Mid ESP

Duct

18k Btu/h

24k Btu/h

36k Btu/h

48k Btu/h

60k Btu/h

Series

Picture of the indoor unit

Universal

outdoor

unit

12k Btu/h

18k Btu/h

24k Btu/h

36k Btu/h

48k Btu/h

60 k Btu/h

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

6

Part 2. Indoor unit

Four-way cassette................................................................................. 7

Ceiling & floor type ............................................................................. 35

Middle static pressure duct type ....................................................... 61

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

7

Four-way cassette

1.Feature ............................................................................................................................ 8

2.Specfication .................................................................................................................... 9

3.Capacity Amendment .................................................................................................... 17

4.Demension .................................................................................................................... 19

5.Electrical wiring and connection .................................................................................... 20

6.Installation ..................................................................................................................... 25

7.Explode view ................................................................................................................. 31

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

8

1.Function introduction

Type

Item

ALCA-H**R1AA/AlCA-H**R1E

ALCA-H**R1AA

12/4

18/4

24/4

36/4

36/5

48/5

60/5

Protection

High pressure protection

－－－

－

● ● ●

Low pressure protection

－－－

－

● ● ●

Compressor overloading protection

● ● ● ● ● ● ●

High exh. temperate protection

－－－

－

● ● ●

Phase protection (Phase-loss, phase- reverse)

－－－

－

● ● ●

Over-heating protection

● ● ● ● ● ● ●

Anti-freezing protection

● ● ● ● ● ● ●

Sensor failure alarm

● ● ● ● ● ● ●

Failure code display

● ● ● ● ● ● ●

Comfort

Cooling

● ● ● ● ● ● ●

Heating

● ● ● ● ● ● ●

3-Speed

● ● ● ● ● ● ●

Auto-restart(Optional)

● ● ● ● ● ● ●

Anti-cold wind

● ● ● ● ● ● ●

Afterheat wind blowing

● ● ● ● ● ● ●

Timing ON/OFF

● ● ● ● ● ● ●

Operation

Time display

● ● ● ● ● ● ●

Operation mode display

● ● ● ● ● ● ●

Fan speed display

● ● ● ● ● ● ●

Defrost display

● ● ● ● ● ● ●

Timing ON/OFF display

● ● ● ● ● ● ●

Wind angle display

● ● ● ● ● ● ●

Sleeping mode display

● ● ● ● ● ● ●

Running

Auto start

● ● ● ● ● ● ●

Dehumidifying

● ● ● ● ● ● ●

Auto defrost

● ● ● ● ● ● ●

Ventilation function

● ● ● ● ● ● ●

Low ambient temperature cooling

● ● ● ● ● ● ●

Health Washable air filter

● ● ● ● ● ● ●

Fresh air interface

● ● ● ● ● ● ●

Installation

Left/right drainage(optional)

－－－－－－－

Left/right pipe connection(optional)

－－－－－－－

Down/back air suction(optional)

－－－－－－－

Installation indicating board

● ● ● ● ● ● ●

Remarks: ● Stands for “YES” － Stands for “NO”

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

9

2.Specfication

Model Indoor Unit

ALCA-H12/4R1AA

ALCA-H18/4R1AA

Panel

MB13

Outdoor Unit

AL-H12/4R1D(U)

AL-H18/4R1D(U)

Factory Model Indoor Unit

ALCa-H12A4/R1C7-B7

ALCa-H18A4/R1C7-B7

Panel

MB13

Outdoor Unit

AL-H12A4/R1(T)-B7

AL-H18A4/R1(T)-B7

Code Indoor Unit

16106022000055

16106022000054

Panel

16108004000004

Outdoor Unit

16107022000017

16107022000019

Power Supply

V~,Hz,Ph

220~240,50,1

Capacity Cooling

Btu/h

12000

18000

kW

3.60

5.30

Heating Btu/h

13500

20000

kW

3.90

5.80

Electric Data

Rated Cooling Power Input

kW

1.19

1.76

Rated Heating Power Input

kW

1.20

1.80

Rated Cooling Current

A

5.49

8.08

Rated Heating Current

A

5.63

8.27

Performance EER

W/W

3.03

3.01

COP

W/W

3.25

3.22

Indoor Fan Motor

Model

YDK25-6E1

YDK30-6E1

Brand

WELLING/Sinjun

Output Power x Fan Quantity

W

25*1

30*1

Capacitor

uF

1.5

2.5

Speed (Hi/Mi/Lo)

r/min

850/750/650

920/850/750

Indoor Coil

Number Of Rows

2

Tube Pitch(a)x Row Pitch(b)

mm

20.5×12.7

Fin Pitch

mm

1.5

Fin Material

Hydrophilic aluminum fin

Tube Outside Dia.and Type

mm

φ7， Inner grooved

Coil Length x Height x Width

mm

1160×184.5×25.4

Heat Exchanging Area

m2

4.32

5.76

Indoor Unit Indoor Air Flow

(Hi/Mi/Lo)

m3/h

620/496/434

900/720/630

Noise Level(Hi/Mi/Lo)

dB(A)

41/38/32

Net Dimension

mm

615×615×263

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

10

(W*H*D)

Packing Dimension (W*H*D)

mm

700×700×330

Net Weight

kg

17.5

18

Gross Weight

kg

21.5

22

Panel

Net Dimension (W*H*D)

mm

650×650×55

Packing Dimension (W*H*D)

mm

700×700×330

Net weight

kg

3

Gross weight

kg

5

Refrigerant Pipe

Liquid Side

mm

6.35

Gas Side

mm

12.7

Max. Refrigerant Pipe Length

m

15

20

Max. Level Difference

m

10

15

Setting Temperature Range

°C

16~32

Operation Ambient Temperature Range

Cooling

°C

-15~49

Heating

°C

-15~24

Application Area

m2

13-21

21-35

Connection Wiring Power Wiring( Indoor)

mm2

3×2.5mm2

3×4mm2

Power Wiring( Outdoor)

mm2

/

Signal Wiring

mm2

3×2.5mm2+2×1mm2

Wireless Remote Controller Model Type

YKR-K/001E

Stufing Quantity

20/40/40H

Set

66/137/161

Note:

1. Working condition of the cooling capacity measured: Indoor temperature 27°C DB, 19°C WB;Outdoor 35°C DB, 24°C WB;

2. Working condition of the heating capacity measured: Indoor temperature 20°C DB, 19°C WB;Outdoor 7°C DB, 6°C WB;

3. Parameters above are all measured when the connecting pipe is 5 meters.

4. Parameters above may be modified as product improvement. We keep the right to change the product

specifications without prior notice, please take the parameters listed on the nameplate as criterion.

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

11

Model Indoor Unit

ALCA-H24/4R1AA

ALCA-H36/5R1AA

Panel

MB12

Outdoor Unit

AL-H24/4R1D(U)

AL-H36/5R1D(U)

Factory Model Indoor Unit

ALCa-H24B4/R1EB-B7

ALCa-H36A5/R1EB-B7

Panel

MB12

Outdoor Unit

AL-H24A4/R1(T)-B7

AL-H36A5/R1(T)-B7

Code Indoor Unit

16106022000053

16106022000056

Panel

16108002000007

Outdoor Unit

16107022000018

16107022000020

Power Supply

V~,Hz,Ph

220~240,50,1

380~415,50,3

Capacity Cooling

Btu/h

24000

36000

kW

7.20

10.60

Heating Btu/h

27500

40000

kW

8.08

11.70

Electric Data

Rated Cooling Power Input

kW

2.39

3.77

Rated Heating Power Input

kW

2.50

3.50

Rated Cooling Current

A

11.06

6.76

Rated Heating Current

A

11.59

6.28

Performance EER

W/W

3.01

2.81

COP

W/W

3.23

3.34

Indoor Fan Motor

Model

XD30A

YDK45-6Q

Brand

WELLING/Sinjun

Output Power x Fan Quantity

W

30*1

45*1

Capacitor

uF

2.5

3

Speed (Hi/Mi/Lo)

r/min

500/430/320

650/520/450

Indoor Coil

Number Of Rows

2

Tube Pitch(a)x Row Pitch(b)

mm

20.5×12.7

Fin Pitch

mm

1.4

Fin Material

Hydrophilic aluminum fin

Tube Outside Dia.and Type

mm

φ7， Inner grooved

Coil Length x Height x Width

mm

2142×205×25.4

Heat Exchanging Area

m2

11.34

12.76

Indoor Unit Indoor Air Flow

(Hi/Mi/Lo)

m3/h

1300/1040/910

1500/1200/1050

Noise Level(Hi/Mi/Lo)

dB(A)

45/42/36

48/45/39

Net Dimension

mm

835×835×250

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

12

(W*H*D)

Packing Dimension (W*H*D)

mm

910×910×310

Net Weight

kg

24

Gross Weight

kg

27.5

Panel

Net Dimension (W*H*D)

mm

950×950×55

Packing Dimension (W*H*D)

mm

1000x1000x100

Net weight

kg

5

Gross weight

kg

7

Refrigerant Pipe

Liquid Side

mm

9.52

Gas Side

mm

15.88

Max. Refrigerant Pipe Length

m

30

50

Max. Level Difference

m

15

30

Setting Temperature Range

°C

16~32

Operation Ambient Temperature Range

Cooling

°C

-15~49

Heating

°C

-15~24

Application Area

m2

28-47

42-70

Connection Wiring Power Wiring( Indoor)

mm2 / 3×1mm2

Power Wiring( Outdoor)

mm2

3×6mm2

5×4mm2

Signal Wiring

mm2

3×2.5mm2+3×1mm2

2×1mm2

Wireless Remote Controller Model Type

YKR-K/001E

Stufing Quantity

20/40/40H

Set

42/82/92

30/70/79

Note:

1. Working condition of the cooling capacity measured: Indoor temperature 27°C DB, 19°C WB;Outdoor 35°C DB, 24°C WB;

2. Working condition of the heating capacity measured: Indoor temperature 20°C DB, 19°C WB;Outdoor 7°C DB, 6°C WB;

3. Parameters above are all measured when the connecting pipe is 5 meters.

4. Parameters above may be modified as product improvement. We keep the right to change the product

specifications without prior notice, please take the parameters listed on the nameplate as criterion.

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

13

Model Indoor Unit

ALCA-H48/5R1AA

ALCA-H60/5R1AA

Panel

MB12

Outdoor Unit

AL-H48/5R1D(U)

AL-H60/5R1D(U)

Factory Model Indoor Unit

ALCa-H48A5/R1EB-B7

ALCa-H60A5/R1EB-B7

Panel

MB12

Outdoor Unit

AL-H48A5/R1(T)-B7

AL-H60A5/R1(T)-B7

Code Indoor Unit

16106022000057

16106022000058

Panel

16108002000007

Outdoor Unit

16107022000022

16107022000023

Power Supply

V~,Hz,Ph

380~415,50,3

Capacity Cooling

Btu/h

48000

60000

kW

14.00

17.60

Heating Btu/h

53000

63500

kW

15.50

18.50

Electric Data

Rated Cooling Power Input

kW

4.87

5.71

Rated Heating Power Input

kW

5.13

6.00

Rated Cooling Current

A

8.88

10.42

Rated Heating Current

A

9.33

10.88

Performance EER

W/W

2.87

3.08

COP

W/W

3.02

3.08

Indoor Fan Motor

Model

XD80A

Brand

WELLING/Sinjun

Output Power x Fan Quantity

W

80*1

Capacitor

uF

3

4

Speed (Hi/Mi/Lo)

r/min

695/585/495

Indoor Coil

Number Of Rows

2

3

Tube Pitch(a)x Row Pitch(b)

mm

20.5×12.7

Fin Pitch

mm

1.4

Fin Material

Hydrophilic aluminum fin

Tube Outside Dia.and Type

mm

φ7， Inner grooved

Coil Length x Height x Width

mm

2142×246×25.4

Heat Exchanging Area

m2

15.60

Indoor Unit Indoor Air Flow (Hi/Mi/Lo)

m3/h

1800/1440/1260

Noise Level(Hi/Mi/Lo)

dB(A)

50/47/41

Net Dimension (W*H*D)

mm

835×835×290

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

14

Packing Dimension (W*H*D)

mm

910×910×350

Net Weight

kg

26.5

Gross Weight

kg

30.5

Panel

Net Dimension (W*H*D)

mm

950×950×55

Packing Dimension (W*H*D)

mm

1000x1000x100

Net weight

kg

5

Gross weight

kg

7

Refrigerant Pipe

Liquid Side

mm

9.52

Gas Side

mm

19.05

Max. Refrigerant Pipe Length

m

50

Max. Level Difference

m

30

Setting Temperature Range

°C

16~32

Operation Ambient Temperature Range

Cooling

°C

-15~49

Heating

°C

-15~24

Application Area

m2

56-93

64-107

Connection Wiring Power Wiring( Indoor)

mm2

3×1mm2

Power Wiring( Outdoor)

mm2

5×4mm2

Signal Wiring

mm2

2×1mm2

Wireless Remote Controller Model Type

YKR-K/001E

Stufing Quantity

20/40/40H

Set

22/50/55

Note:

1. Working condition of the cooling capacity measured: Inside the room DB temperature 27°C,WB

temperature19°C;Outside of the room DB temperature 35°C,WB temperature 24°C;Working condition of the heating capacity measured:Inside the room DB temperature 20°C,Outside of the room DB temperature 7°C,WB temperature 6°C.

2. Parameters above are all measured when the connecting pipe is 5 meters.

3. Parameters above may be modified as product improvement. We keep the right to change the product

specifications without prior notice, please take the parameters listed on the nameplate as criterion.

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

15

Model Indoor

ALCA-H36/4R1E

Panel

MB12

Outdoor

AL-H36/4R1(U)

Factory Model Indoor

ALCa-H36A4/R1-EA

Panel

MB12

Outdoor

AL-H36A4/R1(T)

Code Indoor

16106021000005

Panel

16108002000007

Outdoor

16107022000001

Power Supply

V~,Hz,Ph

220~240,50,1

Capacity Cooling

Btu/h

36000

KW

10.60

Heating Btu/h

40000

KW

11.70

Electric Data

Rated Cooling Power Input

KW

3.77

Rated Heating Power Input

KW

3.50

Rated Cooling Current

A

17.3

Rated Heating Current

A

16.6

Performance EER

W/W

2.81

COP

W/W

3.34

Indoor Fan Motor

Model

YDK45-6Q

Brand

WELLING/Sinjun

Output Power x Fan quantity

W

45*1

Capacitor

uF 3 Speed (Hi/Mi/Lo)

r/min

650/520/450

Indoor Coil

Number Of Row

2

Tube Pitch(a)x Row Pitch(b)

mm

20.5×12.7

Fin Pitch

mm

1.4

Fin Material

louver

Tube Outside Dia.and Material

mm

φ7， Inner grooved

Coil Length x Height x Width

mm

2014×205×25.4

Heat Exchanging Area

m2

12.18

Indoor Unit Indoor Air Flow

(Hi/Mi/Lo)

m3/h

1500/1200/1050

Noise Level(Hi/Mi/Lo)

dB(A)

48/45/39

Net Dimension

mm

835×835×250

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

16

(W*H*D)

Packing Dimension (W*H*D)

mm

910×910×310

Net Weight

Kg

24

Gross Weight

Kg

27.5

Panel

Net Dimension (W*H*D)

mm

950×950×55

Packing Dimension (W*H*D)

mm

1000x1000x100

Net weight

Kg

5

Gross weight

Kg

7

Refrigerant Pipe

Liquid Side

mm

9.52

Gas Side

mm

15.88

Max. Refrigerant Pipe Length

m

50

Max. Difference In Level

m

30

Operation Temperature Range

°C

16~32

Ambient Temperature Range(Cooling/Heating)

°C

-5~49/-15~24

Application Area

m2

42-70

Connection Wiring Power Wiring( Indoor)

3×4mm2

Power Wiring( Outdoor)

5×4mm2

Signal Wiring

2×1mm2

Wireless Remote Controller

YKR-K/001E

Qty’per 20’& 40’&40HQ (Only For Reference)

Set

30/70/79

Note:

1. Working condition of the cooling capacity measured: Inside the room DB temperature 27°C,WB

temperature19°C;Outside of the room DB temperature 35°C,WB temperature 24°C;Working condition of the heating capacity measured:Inside the room DB temperature 20°C,Outside of the room DB temperature 7°C,WB temperature 6°C.

2. Parameters above are all measured when the connecting pipe is 5 meters.

3. Parameters above may be modified as product improvement. We keep the right to change the product

specifications without prior notice, please take the parameters listed on the nameplate as criterion.

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

17

3.CapacityAmendment

3.1 Amendment coefficient of cooling capacity under different indoor/outdoor temperature

Indoor temperature°C

Outdoor temperature°C(DB)

DB

WB

25

30

35

40

43

45

47

49

23

16

0.98

0.94

0.89

0.85

0.82

0.79

0.74

0.71

25

18

1.05 1 0.95

0.90

0.87

0.82

0.77

0.72

27

19

1.1

1.05 1 0.95

0.91

0.87

0.84

0.79

28

20

1.12

1.07

1.02

0.96

0.93

0.90

0.86

0.81

30

22

1.19

1.13

1.08

1.02

0.99

0.96

0.91

0.88

32

24

1.26

1.20

1.15

1.08

1.05

1.02

0.97

0.92

Actual cooling capacity calculation: Actual cooling capacity=amendment coefficient of cooling capacity × nominal cooling capacity

——nominal cooling capacity could be found from the performance parameters list ——amendment coefficient of cooling capacity could be found from table above.

Amendment coefficient of heating capacity under different indoor/outdoor temperature

Actual heating capacity calculation: Actual heating capacity=amendment coefficient of heating capacity × nominal heating capacity

——nominal heating capacity could be found from the performance parameters list ——amendment coefficient of heating capacity could be found from table above.

Indoor DB

temperature °C

Outdoor temperature °C(WB)

-15

-10

-5 0 6

10

15

16

0.45

0.53

0.65

0.80

1.02

1.13 - 18

0.47

0.55

0.61

0.76

1.02

1.12 - 20

0.46

0.54

0.6

0.75 1 1.11

1.25

21

0.42

0.49

0.59

0.72

0.99

1.1

1.24

22

0.41

0.49

0.58

0.71

0.97

1.09

1.23

24

0.39

0.45

0.56

0.7

0.96

1.08

1.22

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

18

3.2 Amendment coefficients of heating and cooling capacity under different height drop

Different Cooling Capacity modified coefficients at different height:

Note:

H = Height of Outdoor Unit － Height of Indoor Unit

Different Heating Capacity modified coefficients at different height:

Note:

H = Height of Outdoor Unit － Height of Indoor Unit

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

19

4.Demension

ALCA-H12/4R1AA, ALCA-H18/4R1AA

ALCA-H24/4R1AA，ALCA-H36/4R1E ,ALCA-H36/5R1AA

ALCA-H48/5R1AA，ALCA-H60/5R1AA

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

20

5.Electrical wiring and connection

ALCA-H12/4R1AA, ALCA-H18/4R1AA

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

21

ALCA-H24/4R1AA

ALCA-H36/4R1E ,ALCA-H36/5R1AA ,ALCA-H48/5R1AA，ALCA-H60/5R1AA

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

22

Electrical connection

ALCA-H12/4R1AA ALCA-H18/4R1AA

ALCA-H24/4R1AA,

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

23

ALCA-H36/4R1E

ALCA-H36/5R1AA，ALCA-H48/5R1AA，ALCA-H60/5R1AA

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

24

Introduction of Control Board QRDL-3F(2S)-SYE1 (indoor unit) (match with the outdoor unit which the Power supply is 220V-240V, 1PH)

Introduction of control board QRD-SN3F(EX)-SYE1 sockets (Indoor unit) (match with the outdoor unit which the Power supply is 380V-415V, 3PH)

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

25

6.Installation

6.1 Preparation before installation

1. Please buy following spare parts from your local market before installation

 Hung bolts M12, 4 pcs

 Drainage pipe PVC

 Copper pipe

 Adhesive belt (big size) 5 pcs, (small size) 5 pcs

 Heat insulation material used to connect copper pipe (PE foam material, its thickness is more

than 8mm)

 Power cable, electrical wire between indoor and outdoor unit(Must be in accordance with the

wire diameter in the wiring diagram)

2. Beside general implements, other implements are needed when connecting the pipe

 Acetylene cylinders, oxygen cylinders (when longer pipe used it should be welded)

 One set pipe cut machine. (cut copper pipe)

 Refrigerant cans, electronic balance (when longer pipe used additional gas should be charged)

 Pressure gauges, pipe clamp, welding torch, 2B silver electrode

 Wrench 2 pcs, one of them is with adjustable torque wrench(42N.m,65N.m,100N.mm)

 Nitrogen cylinder (in order to prevent oxidation when welding, using Nitrogen to replace the

air)

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

26

6.2 Installation diagram

6.3 Installation precaution

◇ Hanging location should be able to support the unit’s weight, there should be no increasement in

noise and vibration. If the hanging location needs reinforcement, it should be reinforced before installation;

◇ Choose the space above the ceiling that can put the indoor unit inside; ◇ The location should be easy for drainage; ◇ The unit should not be installed beside the heat source, steam or oil mist source (such as machine

room, kitchen, laundry room, mechanical workshop, etc.)

◇ Choose the location at least 1 meter away from TV and radio, in order to avoid interference to them ◇ There should be certain distance between indoor unit and obstacles for maintence; ◇ In case of leakage of refrigerant, units should immediately stop running, and contact with

maintenance personnel in time. There must be no fire at the site, because the refrigerant will turn to harmful gas when get to the fire.

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

27

6.4 The distance between indoor unit and obstacle

6.5 Indoor unit suspension

◇ Select the suspension foundation: ◇ The suspension foundation is a structure of either wooden frame or reinforced concrete. It must be

firm and reliable to bear at least 4 times weight of itself and capable of bearing vibration for long periods.

◇ Fixing of suspension foundation: ◇ Fix the suspension bolts either as shown in the picture or by a steel or wooden bracket.

◇ If this unit is installed on a sloping ceiling, a cushion block should be installed between the ceiling and

the air outlet panel, in order to ensure that the unit is installed on a level surface.

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

28

This is as shown in the drawing as follows:

◇ Adjust the relative position of the suspension hook on the suspension bolt so that the unit can be in

level position in all directions. Check with a level gauge after installation to ensure that the indoor unit is horizontal, otherwise it will cause water leakage, air leakage etc.

◇ Tighten the bolt and ensure that four hooks are in close contact with the nuts and washers, to fix the

indoor unit under the ceiling.

◇ After the unit is installed ensure it is secure and does not shake or sway. ◇ Ensure that the centre of the indoor unit is in alignment with the centre of the opening in the ceiling.

6.6 Drainage pipe installation

◇ The drainage pipe should be properly insulated to prevent the generation of condensation. Heat

insulation material: the thickness of rubber insulation pipe should be more than 8mm

◇ Drainage pipe must have a downward gradient (1 / 50 1 / 100) to avoid water backflow or leakage etc.

◇ The unit has a drain pump which will lift up to 1200mm. However after the pump stops the water left in

the pipe will drain back and may overflow the drain tray causing water leakage. For this reason please install the drain pipe as shown.

More than 1:100

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

29

◇ When draining multiple units into a common drain line, this common drain should be installed about

100mm below each units drain outlet, as shown in the drawing.

◇ When finish installation please carry out the drainage test to ensure that the water flow through the

pipeline fluently, and carefully observe the junction to ensure that there is no water leakage. If the unit is installed in the newly built house, strongly recommend that this test taken before the ceiling installation. Even it is the heating only unit, this test is unavoidable.

6.7 Panel installation

◇ As to the MB12 panel please refer to the following picture, the panel has four hooks which attach to

corresponding hangers on the unit and the panel should be positioned using these first. The panel is then fixed into position by four bolts which are accessed through the four corner panels on the grille.

6.8 Connect duct, fresh air ventilation

In order to meet different customers’ requirements and their different usage environment, indoor unit reserves one fresh air ventilation hole and four duct connection holes. The fresh air can be introduced from outside or through duct.

Less than 300mm

Less than 600mm

(Unit: mm)

Less than 800mm

More

than

1 00

mm

AUX Light Commercial Air Conditioners T1,50Hz, R410a,ON/OFF

30

◇ Fresh air ventilation: In the corner of the unit there is a circular fresh air connection hole, if users want

this feature, please cut down the circular metal sheet and connect it to the duct. Fresh air hole is connected to the return air inlet of the indoor unit, when operation, the fresh air can be introduced from outside due to the negative pressure.

AUX AL-H12/4R1D, AL-H12/4R1DU, AL-H18/4R1D, AL-H18/4R1DU, ALCa-H12A4/R1C7-B7 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual