Midea LRSJF-V120, SN1-610, LRSJF-V140, SMK-120, CSD80GN1 Technical Manual

MCAC-RTSM-2012-07 M-thermal Technical Manual(part 1)

1

Midea M-thermal

Heat Pump Water Heater

Technical Manual

Midea reserves the right to discontinue, or change at any time, specifications or designs without notices and
without incurring obligations.

LRSJF-V120/SN1-610
LRSJF-V140/SN1-610

Outdoor unit

LSX-300XP/D15B11

Water tank

SMK-120/CSD80GN1
SMK-140/CSD80GN1

Indoor unit

TMK-01

Solar kit

MCAC-RTSM-2012-07 M-thermal Technical Manual(part 1)

2

Part 1

System Outline

1. Measurements ................................................................. 3

2. External Appearance ...................................................... 4

3. Nomenclature .................................................................. 5

4. Features ........................................................................... 7

5. Specifications .................................................................. 9

5.1 Specifications of outdoor units .......................................................... 9

5.2 Specifications of Hydraulic indoor unit .......................................... 10

5.3 Specifications of water tank and solar kit ........................................11

6. Performance data .......................................................... 12

6.1 Heating performance data of 14kw model ...................................... 12

6.2 Cooling performance data of 14kw model ...................................... 12

6.3 Heating performance data of 12kw model ...................................... 13

6.4 Cooling performance data of 12kw model ...................................... 13

7. Wiring Diagrams ........................................................... 14

7.1 Outdoor units wiring diagram .......................................................... 14

7.2 Hydraulic indoor units wiring diagram ............................................ 15

8. Exploded View ............................................................... 16

8.1 Exploded view of outdoor units ....................................................... 16

8.2 Exploded view of hydraulic indoor units ........................................ 18

8.3 Exploded view of water tank ............................................................ 20

8.4 Exploded view of solar kit ................................................................ 22

MCAC-RTSM-2012-07 M-thermal Technical Manual(part 1)

3

1. Measurements

Outdoor units

Model name

Dimension (mm)

Net/Gross weight (kg)

Power supply

LRSJF-V120/SN1-610

Width: 900

Height: 1327

Depth:348

89/101

380V～415V-50Hz

3 Ph

LRSJF-V140/SN1-610

Hydraulic indoor unit

SMK-120/CSD80GN1

Width: 900
Height:500

Depth:375

63/75

380V～415V-50Hz

3 Ph

SMK-140/CSD80GN1

Solar kit

TMK-01

Width: 810

Height: 310

Depth:295

8/10

220V～240V-50Hz

1 ph

Water Tank

Model name

Dimension (mm)

Net/Gross weight (kg)

Packing Dimension W×D×H

LSX-300XP/D15B11

Ф580×1800

75//84

620×1960×635

MCAC-RTSM-2012-07 M-thermal Technical Manual(part 1)

4

2. External Appearance

LRSJF-V120/SN1-610
LRSJF-V140/SN1-610

SMK-120/CSD80GN1 SMK-140/CSD80GN1

TMK-01

MCAC-RTSM-2012-07 M-thermal Technical Manual(part 1)

5

3. Nomenclature

Outdoor unit

CE-L RSJF-V120/SN1- 610

Design code
Refrigerant type (R410a)
380-415V~ 3phase 50Hz
Heating Capacity (12000W)
Compressor type (DC inverter compressor)
Split type
Midea Heat Pump water heater
Heating and cooling mode (Omit for heating)
Export model code

LSX-300XP/D15B11

MCAC-RTSM-2012-07 M-thermal Technical Manual(part 1)

6

Indoor unit

CE- SMK – 80 / C S D 80 G N1

Solar kit

CE-TMK-01

CE-L SX-300XP/ D15 B11

Refrigerant type (R410a)
Heating type (Floor heating)
E-heater Capacity (8000W)
Electric heater
Power type (3ph, 380V)
Water cycle type
Heating Capacity (8000w)
Hydraulic modular
Export model code

Design code
Solar heating unit
Export model code

Design code
E-heater power(1500w)
Electric heater
Water tank appearance code (spraying appearance)
Water tank inner tank code (Stainless Steel inner tank )
Water tank volume (300L)
Water tank code
Water tank type code (vertical type)
Export model code

MCAC-RTSM-2012-07 M-thermal Technical Manual(part 1)

7

4. Features

4.1 Safety

a. Realize isolation between water and electricity. No electric shock problem, more safety.
b. No fuel tubes and storage, no potential danger from oil leakage, fire, explosion etc. Five operating

mode:

1). Space cooling

2). Space heating

3). Water heating

4). Space cooling + water heating

5). Space heating + water heating

4.2 Environmental friendly.

a. R410a refrigerant;
b. No discharge of poisonous gas;

4.3 DC inverter system.

.

4.4 Automatic weekly anti-legionella function

4.5 Easy operation and automatic control.

The system can be controlled simply through the wire controller.

MCAC-RTSM-2012-07 M-thermal Technical Manual(part 1)

8

4.6 High efficiency and energy-saving.

The unit adopts heat pump principle, which absorbs heat from outdoor air and produce heat water, thermal
efficiency for water heating be up to 4.3.

4.7 All the weather the system can run.

Within the temperature range from -20 to 43℃, it will not be affected by night, overcast sky, rain and snow.

4.8 Convenient installation and maintenance

The quadrate type can be easily installed in a corner of the verandah even if it’s very narrow.

4.9 Total Heating Solution

When floor heating is conducted in a new house, warm air spreads gently across the house, making it
comfortable and enabling the use of broad space without necessitating radiators or FCU.

4.10 Comfort System

When floor heating is applied, warm air spreads gently across the house, making it comfortable. The system
can help blood circulation and metabolism, further boosting our health.

The installation of M-Thermal will eliminate oil or gas tank, making the household surrounding neat and safe,
enabling the use of more space, and avoiding refueling.

4.11 Reduce CO2 emission

When the system is connected to solar panels, CO2 can be reduced more sharply.
In addition, M-thermal can significantly cut CO

2

emission when being connected to solar thermal panel a

completely pure energy source.

4.12 CE approval

Solar Panel

MCAC-RTSM-2012-01 M-thermal Technical Manual

9

5. Specifications

5.1 Specifications of outdoor units

DC Inverter outdoor unit

LRSJF-V120/SN1-610

LRSJF-V140/SN1-610

Power supply

Ph-V-Hz

3-380～415-50

3-380～415-50

Max. current

A 9 9

Heating
Capacity

kW

12

14

COP

kW/kW

4.17

4.13

Ambient Temp.

℃

-20～43

-20～43

Cooling
Capacity

kW

8.8

8.8

COP

kW/kW

2.22

2.28

Ambient Temp.

℃

15～43

15～43

Unit
Dimension (W×H×D)

mm

900×1327×320

900×1327×320

Packing (W×H×D)

mm

1016×1456×435

1016×1456×435

Net/gross weight

kg

89/101

89/101

Noise level

dB(A)

58

58

Refrigerant
type/quantity

kg

R410a/2.7kg

R410a/2.7kg

system pressure

MPa

4.4/2.6

4.4/2.6

Refrigerant
pipe

Liquid side

mm

Ф9.52

Ф9.52

Gas side

mm

Ф16

Ф16

Max. length

m

50

50

Max. difference between
outdoor unit and indoor unit

m

15

15

Compressor

Model

TNB306FPNMC

TNB306FPNMC

Type

Rotary

Rotary

Brand

Mitsubishi

Mitsubishi

Capacity

kW

9.88

9.88

Input

w

3010

3010

Locked rotor current

A

45

45

Rate current

A

9.3

9.3

Crankcase

W

30

30

Fan motor

Brand

Panasonic

Panasonic

Model

WZDK100-38G（×2）

WZDK100-38G（×2）

Type

DC MOTOR

DC MOTOR

Input

w

100*2

100*2

Output

w

110*2

110*2

Speed

r/min

800

800

Outdoor coil

Number of rows

2 2

Tube pitch(a)x row pitch(b)

mm

25.4/22

25.4/22

Tube dia. and type

mm

7.94(female screw)

7.94(female screw)

Fin space

mm

1.7

1.6

Fin type (code)

Hydrophilic aluminum

Hydrophilic aluminum

Coil length x height

1276*870

1276*870

Number of circuits

7 7

Loading
Quantity

20'/40'/40H

Pcs

28/58/58

28/58/58

MCAC-RTSM-2012-01 M-thermal Technical Manual

10

5.2 Specifications of Hydraulic indoor unit

Hydraulic indoor unit

SMK-120/CSD80GN1

SMK-140/CSD80GN1

Power supply

Ph-V-Hz

3-380～415-50

3-380～415-50

Function

Types

Heating &Cooling

Heating &Cooling

Space
Heating

℃

15～55

15～55

Space
Cooling

℃

7～22

7～22

Sanitary Hot
Water

℃

35～60

35～60

Max. current

A

13.8

13.8

Noise level

dB(A)

32

32

Unit
Dimension

(W×H×D)

mm

900×500×375

900×500×375

Packing
(W×H×D)

mm

1110×610×510

1110×610×510

Net/gross
weight

kg

63/75

63/75

E-heater
Size

kW

4 4 Quantity

1 1 specification

Ph-V

3-400

3-400

E-heater(standby)
Size

kW

4 4 Quantity

1

1

specification

Ph-V

3-400

3-400

Water pipeline
Water inlet

pipe

mm

DN32

DN32

Water outlet
pipe

mm

DN32

DN32

Loading Quantity

20'/40'/40H

Pcs

66/138/184

66/138/184

The testing Condition:

1. Heating: Outdoor temp. 7/6℃(DB/WB), inlet water temp. 30℃, outlet water temp. 35℃.

2. Cooling: Outdoor temp. 35/24℃(DB/WB), inlet water temp. 12℃, outlet water temp. 7℃.

MCAC-RTSM-2012-01 M-thermal Technical Manual

11

5.3 Specifications of water tank and solar kit

Sanitary hot water tank

LSX-300XP/D15B11

Power supply

Ph-V-Hz

1-220～240-50

Storage size

L

300

Max. water output temp.

℃

60

Dimension (D×H)

mm

Ф580×1800

Packing (W×H×D)

mm

670×1885×670

Net//gross weight

kg

80/91

E-heater
specification

kW

1.5

Quantity

1

Power supply

Ph-V

1-220～240-50

Tank material

SUS304

Water
pipeline

Water inlet pipe

mm

DN20

Water outlet pipe

mm

DN20

PT valve joint

MPa

DN20

Solar kit

TMK-01

Power supply

Ph-V-Hz

1-220～240-50

Dimension (W×H×D)

mm

810×310×295

Packing (W×H×D)

mm

830×340×315

Net weight

kg

8/10

solar coils

OD+T

mm*mm

￠22*0.8

Length

m

11

Material

SUS316L

Inlet pipe

mm

DN20

Outlet pipe

mm

DN20

Loading
Quantity

20'/40'/40H

Pcs

300/624/728

MCAC-RTSM-2012-01 M-thermal Technical Manual

12

6. Performance data

6.1 Heating performance data of 14kw model

LWE[℃]

25

32

40

43

50

Tamb [℃]

HC[W]

PI[W]

COP

HC[W]

PI[W]

COP

HC[W]

PI[W]

COP

HC[W]

PI[W]

COP

HC[W]

PI[W]

COP

-20

4850

1725

2.81

3511

1887

1.53 / / / / / / / /

/

-10

6943.5

2471

2.81

6426

2758

2.33

5476

3094

1.77

5120

3220

1.59 / /

/

-5

10555

3586

2.94

8935

3327

2.69

7804

3722

2.1

7391

3883

1.9 / /

/

0

9138

3662

2.5

11254

4115

2.73

10101

4353

2.32

9317

4274

2.18 / /

/

2/1

12614

3835

3.29

13017

4244

3.07

10882

4410

2.47

9922

4369

2.27 / / / 7/6

15601

3851

4.05

14871

4251

3.5

13036

4472

2.92

11897

4410

2.7

6531

3293

1.98

15/12

17258

3629

4.76

17077

4046

4.22

14503

4003

3.62

13969

4205

3.32

7162

2676

2.68

25/17

13570

2331

5.82

14152

2640

5.36

11336

2573

4.41

7696

2288

3.36

6299

2029

3.1

35/24

/ / / / / / 13060

2769

4.72

10902

2530

4.31

6059

1781

3.4

6.2 Cooling performance data of 14kw model

Remark:
CC= cooling capacity PI = power input HC = heating capacity

LWE[℃]

10

15

20

Tamb [℃]

CC[W]

PI[W]

EER

CC[W]

PI[W]

EER

CC[W]

PI[W]

EER

15

4120

1289

3.2 / / / / / /

20

5122

1378

3.72

11441

2980

3.84 / /

/

25

5584

1450

3.85

12009

3217

3.73

14153

3587

3.95

30

5468

1608

3.41

11349

3504

3.24

13596

3504

3.88

35

5463

2110

2.59

10264

3836

2.68

12326

4272

2.89

43

5922

3259

1.82

7357

3365

2.19

8853

3450

2.57

MCAC-RTSM-2012-01 M-thermal Technical Manual

13

6.3 Heating performance data of 12kw model

LWE[℃]

25

32

40

43

50

Tamb [℃]

HC[W]

PI[W]

COP

HC[W]

PI[W]

COP

HC[W]

PI[W]

COP

HC[W]

PI[W]

COP

HC[W]

PI[W]

COP

-20

2883

1749

1.65

2453

1891

1.30 / / / / / / / /

/

-10

7090

2481

2.86

6656

2772

2.40

5514

3107

1.77

4721

3230

1.46 / /

/

-5

9652

3030

3.19

9234

3344

2.76

8498

3750

2.27

7819

3908

2.00 / /

/ 0 5662

2951

1.92

10921

3949

2.77

10277

4363

2.36

9267

4311

2.15

6433

3578

1.80

2/1

11208

3388

3.31

10601

3641

2.91

9432

3768

2.50

9177

4030

2.28

8272

4078

2.03

7/6

14824

3677

4.03

14241

4049

3.52

11589

3978

2.91

11257

4171

2.70

5731

3015

1.90

15/12

17436

3682

4.74

17029

4100

4.15

14311

4056

3.53

13508

4226

3.20

6872

2618

2.62

25/17

13181

2133

6.18

13412

2436

5.51

11683

2457

4.75

10320

2365

4.36

6299

2029

3.10

35/24

/ / / / /

/

11683

2432

4.80

9770

2333

4.19

6748

2031

3.32

6.4 Cooling performance data of 12kw model

Remark:
CC= cooling capacity PI = power input HC = heating capacity

LWE[℃]

10

15

20

Tamb [℃]

CC[W]

PI[W]

EER

CC[W]

PI[W]

EER

CC[W]

PI[W]

EER

15

4199

1308

3.21 / / / / / /

20

6960

1781

3.91

9973

2732

3.65 / /

/

25

7908

2355

3.36

11272

2969

3.8

12878

3018

4.27

30

7752

3064

2.53

10532

3253

3.24

12453

3322

3.75

35

10252

3629

2.82

12494

3753

3.33

15884

4233

3.75

40

7039

2812

2.5

9537

3550

2.69

11506

3663

3.14

43

5814

3251

1.79

7237

3350

2.16

8693

3445

2.52

MCAC-RTSM-2009-09 Midea Heat Pump Water Heater Technical Manual

14

7. Wiring Diagrams

7.1 Outdoor units wiring diagram

Model:CE-LRSJF-V120/SN1-610 CE-LRSJF-V140/SN1-610

MCAC-RTSM-2009-09 Midea Heat Pump Water Heater Technical Manual

15

7.2 Hydraulic indoor units wiring diagram

Model :SMK-120/CSD80GN1 SMK-140/CSD80GN1

MCAC-RTSM-2009-09 Midea Heat Pump Water Heater Technical Manual

16

8. Exploded View

8.1 Exploded view of outdoor units

Model: CE-LRSJF-V120/SN1-610 CE-LRSJF-V140/SN1-610

MCAC-RTSM-2009-09 Midea Heat Pump Water Heater Technical Manual

17

No.

Part Name

Quantity

BOM code

1

Motor bracket assembly

1

201295190080

2

Valve mounting plate

1

201295190083

3

Cover before the tube

1

201295190086

4

Right rear side

1

201295190081

5

Installation of gas-liquid separator plate

1

201295190079

6

Front Panel

1

201295190088

7

Handle

3

201195190001

8

Axial fan

2

201100300524

9

Partition components

1

201295190094

10

Right front side components

1

201295190082

11

Left rear support

1

201295190084

12

Base

1

201295190174

13

Layering fence

1

201295190076

14

Cover parts

1

201295190089

15

Compressor electric heater

1

202403100155

16

Electric heater

1

202403101687

17

Net

2

201195190163

18

Four-way valve parts

1

201695190355

19

Discharge pipe ass'y

1

201695190460

20

Suction pipe ass'y

1

201690590359

21

Electronic expansion valve ass'y

1

201690590595

22

Compressor

1

201401500270

23

Gas-liquid separator

1

201601100084

24

DC Motor

2

202400300216

25

E-part box ass'y

1

203390590094

25.1

Main control board ass'y

1

201390590073

25.2

Inverter module

1

201319902223

25.3

outdoor unit power supply board

1

201395190184

25.4

AC contactor

1

202300850054

25.5

Aluminum electrolytic capacitor

2

202300300109

25.6

Three phase bridge

1

202300500348

25.7

Single-phase bridge

1

202300500910

25.8

Resistance

2

202300130008

25.9

Wire joint

1

202301450115

25.10

Wire joint

1

202301450133

25.11

Six Terminal Block

1

202301400242

26

Electrical inductance Ass'y

1

203395100212

26.1

Compressor capacitor

1

202401090058

26.2

inductance

1

202301000927

27

After the tube cover

1

201295190085

28

Condenser ass'y

1

201595190036

29

Transport to strengthen board

1

201295190078

30

Discharge temp sensor ass'y

1

202301300124

31

room temp sensor ass'y

1

202301300197

32

Outdoor coil temp sensor ass'y

1

202301300438

MCAC-RTSM-2009-09 Midea Heat Pump Water Heater Technical Manual

18

8.2 Exploded view of hydraulic indoor units

Model :SMK-120/CSD80GN1 SMK-140/CSD80GN1

MCAC-RTSM-2009-09 Midea Heat Pump Water Heater Technical Manual

19

No.

Part Name

Quantity

BOM code

No.

Part Name

Quantity

BOM code

1

Electronic control
box mounting plate
2

1

201256390012

21

Right foam refrigerant
pipe

2

202256390004
2

Pump mounting
plate

1

201256390014

22

Left foam refrigerant
pipe

2

202256390005

3

1 electronic control
box mounting plate

1

201256390013

23

Right out of the
bubble pipe

2

202256390002

4

Refrigerant pipe
fixed plate

1

201256390008

24

Left out of the bubble
pipe

2

202256390003

5

Fixed plate inlet

1

201256390009

25

Water tray
components

1

202256390001

6
Pump Bracket 2

1

201256390004

26

Hydraulic module
wired remote

1

203355100567

7

Outlet pipe fixed
plate

1

201256390010

27
Roof

1

201256390033

8

Expansion tank
clamp

1

201290490010

28
Bottom

1

201256390034

9

Handle

1

201256390011

29

Mounting Bracket

1

201256390017

10

E-part box ass'y

1

203356390006

30

Expansion Tank

1

201601300552

10.1

Main controller
ass'y

1

201356390008

31
Small water tank

1

201256390006

10.2

Wire joint, 6p

1

202301400219

32

Casing components

1

201756390001

10.3

32A MCB

2

202301620210

33

Shaft

2

201256390035

10.4

AC contactor

4

202300850054

34

Electric heater

2

202403101682

10.5
Transformer

1

202300900109

35

Outlet pipe
components

1

201656390016

10.6
Wire joint, 5p

1

202301450039

36

Expansion Tank take
over the components

1

201656390014

10.7

Wire joint

1

202301450133

37

Drain Pump

1

202400600085

10.8

Electronic control
box terminal strip
bracket

1

201256390001

38
Connect hose

1

201119900833

10.9

Thirty Terminal
Block

1

202301400244

39

Safety valve

1

201604100106

10.10

E-part box ass'y

1

201256390036

40

Exhaust valve

1

201601601296

11

Electronic control
box cover

1

201256390003

41

Target Flow Switch

1

202301800869

12
Front Panel

1

201256390031

42

Expansion bolt
assembly

5

202501100838

13

Rear

1

201256300023

43

Electric valve

3

201601601255

14

Flip

1

201256390032

44

Y Type filter

1

201695700020

15

Wired remote
support

1

201256390018

45

Hydraulic meter

1

201800100005

16

Pump bracket

1

201256390015

46

Temp sensor

1

202301300311

17

Small water tank
fixed plate

1

201256390016

47

Pipe temperature
sensor assemblies

1

202301300494

18

Decorative plates

1

201156390003

48

Temp sensor ass'y

1

202301300495

19
Decorative ring

1

201156390004

49

Thermostat
components

1

202456390020

20

Electric heating
cover

1

201156390002

MCAC-RTSM-2009-09 Midea Heat Pump Water Heater Technical Manual

20

8.3 Exploded view of water tank

1.5

1.4

1.6

1.9

MCAC-RTSM-2009-09 Midea Heat Pump Water Heater Technical Manual

21

No.

Part Name

Quantity

BOM code

1

Water tank foam components

1

201256190027

1.1

Liner welded components

1

201256190023

1.1.1

Head on liner

1

201256100529

1.1.2

Inner barrel body

1

P0000805371

1.1.3

Terminal Block Bracket

1

201256190025

1.1.4

Temperature control components Ⅱ

2

P0000613681

1.1.5

Solar coil assembly

1

201256190019

1.1.6

Under the head liner

1

201256190024

1.1.7

Interior support frame

1

201290590109

1.1.8

Inlet components

1

P0000613631

1.1.9

Drainage fittings

1

201290590138

1.1.10

Outlet pipe components

1

P0000613665

1.2

Magnesium anode

1

202990590003

1.3

TP relief valve

1

201601601206

1.4

Three Terminal Block

1

202301400246

1.5

Thermometer

1

202301600046

1.6

Temp sensor

1

202301610028

1.7

Stator of temp. sensor

1

201290590034

1.8

seal ring of radiation pipe

1

202790590001

1.9

Electric heating pipe water

1

202403100092

1.10

Plastic foot

3

201190500293

1.11

Tank bottom

1

P0000805356

1.12

Coil rubber too

1

202790500510

1.13

Water tank handle

2

201156100038

1.14

Shell

1

P0000805335

1.15

Tank cover

1

P0000805345

1.16

Top foam liner

1

202256190001

2

Heater Cover

1

201256190015 3 Wiring nameplate

1

202056190049

MCAC-RTSM-2009-09 Midea Heat Pump Water Heater Technical Manual

22

8.4 Exploded view of solar kit

No.

Part Name

Quantity

BOM code

1

Cross Recess Head Screw

2

202500300859

2

washers

2

202502100091

3

plate exchanger ass'y

1

201756390002

3.1

plate exchanger outlet pipe ass'y

1

201656390002

3.2

plate exchanger

1

201700101111

3.3

plate exchanger inlet pipe ass'y

1

201656390005

3.4

plate exchanger inlet/outlet pipe

2

201656390001

4

right foam

1

202656390002

5

adapter

2

201600401064

6

connecting pipe

1

201656390004

7

Shield pump ass'y

1

202400600073

8

pump connecting tube components

1

201656390010

9

seal ring

2

202795700050

10

non-return valve joint II

1

201656390008

11

non-return valve

2

201656390007

12

seal ring

6

202790500050

13

non-return valve joint IV

1

201656390009

14

Seal Stopper

6

201170390002

15

left foam

1

202656390001

Part 2 Installation

1. Outdoor unit installation ............................................ 2

2. Hydraulic modular unit installation ......................... 12

3. Installation of the solar kit ....................................... 18

4. Installation of sanitary water tank ........................... 22

5 Filed wiring................................................................ 27

1. Outdoor unit installation

1.1 Precaution

1) Ensure that all Local, National and International regulations are satisfied.

2) Read the ”Installation manual” carefully before Installation.

3) The precautions described below include the important items regarding safety. Observe them

without fail.

4) After the installation work, perform a trial operation to check for any problem.

4) Follow the Owner’s Manual to explain how to use and maintain the unit to the customer.

5) Turn off the main power supply switch (or breaker) before the unit maintenance.

6) Ask the customer to keep the Installation Manual together with the Owner’s Manual.

7) Some tools as follow table should be prepared before installation:

1

Philips screw driver

12

Hexagonal wrench

2

Hole core drill(65mm)

13

Pipe flaring tool

3

Spanner

14

Pipe bender

4

Pipe cutter

15

Level vial

5

Knife

16

Metal saw

6

Reamer

17

Manifold gauge (Charge hose:R410A special requirement)

7

Gas leak detector

18

Vacuum pump (Charge hose:R410A special requirement)

8

Tape measure

19

Torque wrench 1/4(17mm)16N•m (1.6kgf•m),

3/8(22mm)42N•m (4.2kgf•m), 1/2(26mm)55N•m (5.5kgf•m)

5/8(15.9mm)120N•m(12.0kgf•m)

9

Thermometer

20

Copper pipe gauge adjusting projection margin

10

Mega-tester

21

Vacuum pump adapter

11

Electro circuit tester

1.2 Accessory

Please check whether the following fittings are of full scopes. If there are some spare fittings ,
please restore them carefully.

1.3 Installation place

Please keep away from the following place, or malfunction of the machine may be
caused:

1) There is combustible gas leakage.

2) There is much oil (including engine oil) ingredient.

3) There is salty air surrounding (near the coast)

4) There is caustic gas (the sulfide, for example) existing in the air (near a hot spring)

5) A place the heat air expelled out from the outdoor unit can reach

your neighbor’s window.

6) A place where the drain water may make problems.

7) A place that the noise interferes your neighbors everyday life.

8) A place that is exposed to a strong wind.

9) A place that is too weak to bear the weight of the unit.

10) A place that block a passage.

11) Uneven place.

12) Insufficient ventilation place.

13) Near a private power station or high frequency equipment.

Caution:

 When an outdoor unit is installed in a place that is always exposed to a strong wind like a

coast or on a high storey of a building, secure a normal fan operation by using a duct or a wind
shield.

 When the outdoor unit is installed in an elevated position be sure to secure its feet.
 Keep indoor unit, outdoor unit, power supply wiring and transmission wiring at least 1 meter

away from televisions and radios. This is to prevent image interference and noise in those
electrical appliances. (Noise may be generated depending on the conditions under which the
electric wave is generated, even if 1 meter is kept.)

 The insulation of the metal parts of the building and the heater pump should comply with the

regulation of National Electric Standard.

1.4 Dimensions of the outdoor unit

1.5 Installation space

1) Single unit installation

2) Parallel connect the two units or above

3) Parallel connect the front with rear sides

1.6 Moving and installation

1) Since the gravity center of the unit is not at its physical center, so please be careful when
lifting it with a sling.

2) Never hold the inlet of the outdoor unit to prevent it from deforming.

3) Do not touch the fan with hands or other objects.

4) Do not lean it more than 45°, and do not lay it sidelong.

5) Make concrete foundation according to the specifications of the outdoor units.

6) Fasten the feet of this unit with bolts firmly to prevent it from collapsing in case of
earthquake or strong wind. (Refer to follow fig.)

1.7 Water Outlet

Caution:

 While installing the outdoor unit, pay attention to the installation place and the drainage

pattern; if it’s installed at the alpine zone, the frozen condensed water will block up the water
outlet, please pull out the rubber stopper of the reserve water outlet. If that still fails to satisfy
for the water draining, please knock open the other two water outlets, and keep the water can
drain in time.

 Pay attention to the knock the reserve water outlet from outside to inside, and it will be beyond

repair after knocking open, please pay attention to the installation place, lest cause the
inconvenience. Please do the moth proofing for the knocked out hole, to avoid the pest
processing into and destroy the components.

1.8 Pipe connection

1) Check whether the height drop between the indoor unit and outdoor unit, the length of
refrigerant pipe, and the number of the bends meet the following requirements:

Model

The max height drop(m)

The length of

refrigerant pipe(m)

When outdoor unit

is top

When outdoor

unit is bottom

LRSJF-V120/SN1-610

15

10

50

LRSJF-V140/SN1-610

15

10

50

Model

Gas side/Connection type

Liquid side/ Connection type

LRSJF-V120/SN1-610
LRSJF-V140/SN1-610

Φ15.9/ Flaring

Φ9.5/ Flaring

Indoor unit

Φ15.9/ Flaring

Φ9.5/ Flaring

2) Refrigerant piping heat Insulation

Do the heat insulation to the pipes of gas side and liquid side separately. The temperature of
the pipes of gas side and liquid side when cooling, for avoiding condensation please do the
heat insulation fully.

1) The gas side pipe should use closed cell foamed insulation material, which the fire-retardant
is B1 grade and the heat resistance over 120℃.

2) When the external diameter of copper pipe≤Φ12.7mm, the thickness of the insulating layer
at least more than 15mm;
When the external diameter of copper pipe≥Φ15.9mm, the thickness of the insulating layer at
least more than 20mm.

3) Please use attached heat-insulating materials do the heat insulation without clearance for
the connecting parts of the indoor unit pipes.

3) Refrigerant piping connection

We should wash the pipes with high pressure nitrogen, never use refrigerant of the outdoor
units. Make sure there is no dirt or water in the pipes before connecting the pipes to the
outdoor units.

Caution:

● Please pay attention to avoid the components where it is connecting to the connecting
pipes.

● To prevent the refrigerant piping from oxidizing inside when welding, it is necessary to

charge nitrogen, or oxide will chock the circulation system.

The indoor and outdoor connecting pipe interface and power line outlet. Can select various piping
and wiring patterns such as out from the front, the back, the side and undersurface etc.(The follow
display the locations of several piping and wiring knock-off interfaces）

Caution:

● Side out pipe: please remove the L-shape metal plate, otherwise can not wiring.

● Back out pipe:

Undersurface outlet pipe: the knock out should from inside to outside, and then piping and wiring
through this. Pay attention to the piping, the fat connecting pipe should out from the largest hole,
otherwise the pipes will be rubbed. Please do the moth proofing for the knocked out hole, to
avoid the pest processing into and destroy the components.

● Please wipe off the piping support rubber blanket beside the inner outlet pipe cover of the
machine while back side getting out pipes.

1.9 Airtight Test

When we have connected the refrigerant pipe as follows diagram, we should do airtight test to
check whether the system is leakage.

Caution：

● Pressured nitrogen [ 4.3MPa (44kg/cm2 ) for R410A] should be used in the airtight test.

● Tighten high pressure/low pressure valves before applying pressured nitrogen.

● Apply pressure from air vent mouth on the high pressure/low pressure valves.

● The high pressure/low pressure valves are closed when applying pressured nitrogen.

● The airtight test should never use any oxygen, flammable gas or poisonous gas.

1.10 Air Purge With Vacuum Pump

After the airtight test, we should remove the air in the refrigerant connecting pipes.

1) Using vacuum pump to do the vacuum, never using refrigerant to expel the air.

2) Vacuuming should be done from both liquid side and gas side simultaneously.

3) The system should be vacuumized until the vacuum pump indicates the pressure of the pipes
less than 10pa.

1.11 Refrigerant Amount To Be Added

Calculate the added refrigerant according to the diameter and the length of the liquid side pipe
of the outdoor unit/indoor unit connection. If the length of the liquid side pipe is less than 5
meters it is no need to add more refrigerant, so than calculating the added refrigerant the length
of the liquid side pipe must subtract 5 meters.

2. Hydraulic modular unit installation

2.1 Accessory

Please check whether the following fittings are of full scopes. If there are some spare fittings ,
please restore them carefully.

Hydraulic

Indoor

Unit

Accessories

Owner's & Installation

Manual

1

Mounting bracket

1

Two-way valve

3

M4 screws

2

Water tank temperature sensor

1

Y-sharp filter

1

Floor heating inlet

temperature sensor, T1B

1

Drain pan kit

1

M8 expansion screws

5

2.2 Installation place

Selecting an installation location

 The indoor unit is to be wall mounted in an indoor location that meets the following

requirements:

 The installation location is frost-free.
 The space around the unit is adequate for serving.
 The space around the unit allows for sufficient air circulation.

 There is a provision for condensate drain and pressure relief valve blow-off.

Caution:

When the unit running in the cooling mode, Condensate may drop from the water inlet and
water outlet pipes to your furniture and other devices. Please make sure the dropping
condensate will not result in damage of your furniture and other devices.

 The installation surface is a flat and vertical non-combustible wall, capable of supporting the

operation weight of the unit.

 There is no danger of fire due to leakage of inflammable gas.
 All piping lengths and distance have been taken into consideration.

Requirement

SMK-120/CSD80GN1
SMK-140/CSD80GN1

Maximum allowable refrigerant piping length between outdoor unit and
indoor unit.

50m

Maximum allowable height distance between outdoor
unit and indoor unit when outdoor unit is top.

15m

Maximum allowable height distance between outdoor
unit and indoor unit when outdoor unit is bottom

10m

Maximum allowable distance between the 2-way valve SV1 and the indoor
unit (only for installations with sanitary hot water tank).

3m

Maximum allowable distance between the sanitary hot water tank and the
indoor unit (only for installations with sanitary hot water tank). The
thermistor cable supplied with the indoor unit is 15 min length.

10m

Maximum allowable be distance between the T1B and the indoor unit .The
temperature sensor cable of T1B supplied with the indoor unit is 10m in
length.

8m

 The equipment is not intended for use in a potentially explosive atmosphere.

2.3 Dimensions of the hydraulic indoor units

Unit of measurement: mm
Dimensions of the wall bracket:

Dimensions of the unit

2.4 Service space

2.5 Mounting the indoor unit

 Fix the wall mounting bracket to the wall using appropriate plugs and screws.
 Make sure the wall mounting bracket is completely level.
 When the unit is not installed level, air might get trapped in the water circuit resulting in

malfunctioning of the unit.

 Pay special attention to this when installing an indoor unit to prevent overflow of the drain pan

Hang the indoor unit on the wall mounting bracket.

 Fix the indoor unit at the bottom inside using appropriate plugs and screws. To do so, the unit

is equipped with 2 holes at the bottom outer edges of the frame.

2.6 Water pipe insulation

The complete water circuit, inclusive all piping, must be insulated to prevent condensation during
cooling operation and reduction of the cooling and heating capacity.
If the temperature is higher than 30 and the humidity is higher than 80%RH, then the thickness of
the sealing materials should be at least 20 mm in order to avoid condensation on the surface of
the sealing.

Caution:

Failure to do good piping insulation, the cooling/heating capacity
of the unit will be reduced and condensate drop will destroy the furniture and other
devices.

2.7 Water pipework

Checking the water circuit

The units are equipped with a water inlet and water outlet for connection to a water circuit. This
circuit must be provided by a licensed technician and must comply with all relevant European and
national regulations

WARNING:

 The unit is only to be used in a closed water system. Application in an open water circuit can

lead to excessive corrosion of the piping.

 Before continuing the installation of the unit, check the following points:
 The maximum water pressure is 3 bar, but the best pressure range is between 1 to 2 bar. It

will be perfect, if the water pressure is the same as pre-pressure of expansion vessel.

 To facilitate service and maintenance install one shut-off value at the water inlet and one

shut-off value at the water outlet of the indoor unit.

 Drain taps must be provided at all low points of the system to permit complete drainage of the

circuit during maintenance.

 Make sure to provide a proper drain for the pressure relief valve to avoid any water coming

into contact with electrical parts.

 Air vents must be provided at all high points of the system. The vents should be located at

points which are easily accessible for servicing. An automatic air purge is provided inside the
indoor unit. Check that this air purge is not tightened too much so that automatic release of air
in the water circuit remains possible.

There might be air in the electric heater water tank. The air will cause the damage of the
electric heater and cause the abnormal operation of the system. The air in the water tank can
be purged by the manual discharging valve in the top of the water tank. The power for the
electric heater cannot be supplied before discharging the air in the water tank. It will last 30
min until discharging the air completely.

 Take care that the components installed in the field piping can withstand the water pressure.
 The filter (accessory of indoor unit) must be connected into the water circuit.

CAUTION

When the unit running in the cooling mode, there will be condensate drop the water inlet and

water outlet pipes. Please make sure the dropping condensate will not result in damage of
your furniture and other devices.

Checking the water volume and expansion vessel pressure

The unit is equipped with an expansion vessel of 6.5 liter which has a default pre-pressure of 1
bar.
To assure proper operation of the unit, the pre-pressure of the expansion vessel might need to
be adjusted and the minimum and maximum water volume must be checked.

Setting the pre-pressure of the expansion vessel

When it is required to change the default pre-pressure of the expansion vessel (1bar), keep in
mind the following guidelines:

● Use only dry nitrogen to set the expansion vessel pre-pressure.

● Inappropriate setting of the expansion vessel pre-pressure will lead to malfunction of the

system. Therefore, the pre-pressure should be adjusted by a licensed installer.

Calculating the water circuit pressure drop

If the water circuit pressure drop excluding the indoor is too high, an auxiliary pump is necessary
to be installed in the water circuit.

Caution

●An auxiliary pump should be installed while the water resistance is more than 30kpa.

●The auxiliary pump should be installed while the water resistance is more than 30kpa. The

pressure drop is too high may cause heating/cooling capacity reduction, the heat exchanger
freeing and the pump damage.

Warning

If the indoor unit is not running for 24 hours, the pump in the indoor unit and the auxiliary pump(if
installed) will turn on and run for 3 minutes to preventing pump from blocking.

Connecting the water circuit

WARNING

Be careful! the unit pipes may be deformed by using excessive force when connecting the piping.
Deformation of the piping can cause some malfunctions.

Water connections must be made in accordance with the outlook diagram delivered with the unit,
respecting the water in- and outlet.
If air, moisture or dust gets in the water circuit, problems may occur. Therefore, always take into
account the following when connecting the water circuit:

● Use clean pipes only.

● Hold the pipe end downwards when removing burrs.

● Cover the pipe end when inserting it through a wall so that no dust and dirt enter.

● Use a good thread sealant for the sealing of the connections. The sealing must be able to

withstand the pressures and temperatures of the system.

● When using non-brass metallic piping, make sure to insulate both materials from each other to
prevent galvanic corrosion.

● Because brass is a soft material, use appropriate tooling for connecting the water circuit.
Inappropriate tooling will cause damage to the pipes.
WARNING

● The unit is only to be used in a closed water system. Application in an open water circuit can

lead to excessive corrosion of the water piping.

● Never use Zn-coated parts in the water circuit. Excessive corrosion of these parts may occur
as copper piping is used in the unit’s internal water circuit.

2.8 Charging water

■ Connect the water supply to a drain and fill valve.

■ Make sure the automatic air purge valve is open (at least 2 turns).

■ Fill with water until the manometer indicates a pressure of approximately 1.0~2.0 bar. Remove

air in the circuit as much as possible using the air purge valves. Air present in the water circuit
might cause malfunctioning of the auxiliary heater.

■ Check that the auxiliary heater vessel is filled with water by screw off the vent valve two laps, it
will be full of water until finish draining off the air.

NOTE:

● During filling, it might not be possible to remove all air in the system. Remaining air will be
removed through the automatic air purge valve during first operating hours of the system.
Additional filling with water afterwards might be required.

● The water pressure indicated on the manometer will vary depending on the water temperature
(higher temperature at higher water temperature).However, at all times water pressure should
remain above 0.3 bar to avoid air entering the circuit.

● The unit might dispose some excessive water through the pressure relief valve.

● Water quality must be according to EN directive 98/83 EC.

3. Installation of the solar kit

The solar kit is designed to transfer the heat from the solar panels to the heat exchanger of the
sanitary hot water tank and is to be installed in the system.

3.1 Accessories supplied with the solar kit

3.2 Main components of the solar kit

1

left EPP casing

8

Return connection to solar pump station

2

Left right foam fixed screw

9

Non-return valves

3

Sanitary hot water tank

10

Solar kit circulation pump

4

Right EPP casing

11

Return connection to the indoor unit

5

Return connection to the sanitary hot
water tank heat exchanger

12

Non-return valves

6

Inlet connection from the indoor unit

13

Inlet connection from the sanitary
hot water tank heat exchanger

7

Heat exchanger

3.3 Selecting an installation location

 The solar kit is to be installed in a frost free indoor space, directly connected to the sanitary hot

water tank.

 Make sure the service space is available.
 The space around the unit has to allow sufficient air circulation.
 It shall be made sure that in the case of a leak, leaking water will not cause any damage or

unsafe situations.

 Do not install or operate the unit in rooms mentioned below:

 Where corrosive gas like sulphurous gas exists: copper tubing and brazed spots may

corrode.

 Where volatile flammable gas like thinner or gasoline is used.
 Where machines generating electromagnetic waves exist the control system may

malfunction.

 Where the air contains high levels of salt such as air near the ocean and where voltage

fluctuates a lot (e.g. in factories).This applies also to vehicles or vessels.

3.4 Dimensions and service space

Service space dimensions below relate to requirements for installation of the solar kit only.

3.5 Installation guidelines

Make sure that all the piping to the solar kit is insulated.
Make sure that all the piping to the solar kit is sufficiently supported so that it will not cause any
stress on the solar kit.
Make sure that the piping coming from outdoors to the solar kit is put through the wall under an

angle and the wall hole is sufficiently sealed afterwards, so no water can enter the space.

Make sure the piping is protected against dirt during installation.
Dirt in the piping might clog the heat exchanger of the solar panel and reduce its performance.

3.6 Installing the solar kit

● At delivery, the unit should be checked and any damage should be reported immediately to
the carrier claims agent.

● Check if all unit's accessories are enclosed.

● Bring the unit as close as possible to its final installation position in its original package. in

order to prevent damage during transport.

 Procedure

Locate the sanitary hot water tank in a suitable position to facilitate the installation of the solar kit.
It is therefore recommended to first read the entire installation procedure. Refer to the
installation guidelines in the installation manual of the sanitary hot water tank.
The installation of the solar kit as following:

 Fit the adaptor 3/4" Female BSP x 3/4" Male BSP in the flow inlet connection of the sanitary

hot water tank.

 Fit the connection pipe 3/4 " Male BSP x3/4" Male BSP and sealing in the flow inlet connection

of the sanitary hot water tank.

 Fit the adaptor 3/4" Male BSP x3/4" Male BSP in the heat exchanger outlet connection of the

sanitary hot water tank.

 Fit the solar kit and sealing (x2) on the heat exchanger in let connection and heat exchanger

outlet connection of the sanitary hot water tank. Torque 5 N.m.

 Fit the adaptors 3/4" Male BSP x 3/4" Male BSP (x4) to the field piping:

a) Inlet connection from indoor unit
b) Return connection to indoor unit
c) Inlet connection from solar pump station
d) Return connection to solar pump station

 Fit the solar kit and sealing (x4) to the field piping .Torque 5N.m.
 Mount the left side of the EPP casing onto the solar kit.
 Mount the EPP lid onto the right side of the EPP casing.
 Mount the right side of the EPP casing onto the solar kit. Take case, that the pump cable is

routed via the holes in the Bottom of the EPP casing.

CAUTION:

Ensure that the pump cable cannot come into contact with piping below the pump when cable
is routed out.

 Use the screws and washers (x2) to fix the EPP casing. Screw until tight position.

WARNING

Do not switch inlet and outlet connections.
To install adequate connections between the indoor unit and the solar kit, it is important that
the 2-way valve is fitted correctly.

CAUTION:

Ensure that the water piping connected to the solar kit coming from the solar panel and the
indoor unit are sufficiently supported and do not cause any stress on the solar kit

 Charging water

Charge the water on the indoor unit and the tank .Charge the solar panel circuit with a glycol
solution.

CAUTION:

Observe the instructions as given by your solar panel supplier. Make sure to use non-toxic glycol.

4. Installation of sanitary water tank

4.1 Accessories of water tank

4.2 Selecting an installation location

 Enough space is installation and maintenance shall be preserved.
 The bearing surface should be flat able to bear weight of the unit.
 No flammable gas is leaked nearby.
 It is convenient for piping and wiring.

 If the unit need to be installed on a metal holder, make sure they are insulated well and in

accordance with local standard.

 Installing the equipment in any of the following places may lead to malfunction of the

equipment (if it is inevitable, consult the supplier).

 The site contains mineral oils such as cutting lubricant.
 Seaside where the air contains much salt.
 Hot spring area where corrosive gases exist, e.g., sulfide gas.
 Factories where the power voltage fluctuates seriously.
 Place like kitchen where oil permeates.
 Place where strong electromagnetic waves exist.
 Place where flammable gases or materials exist.
 Place where acid or alkali gases evaporate.
 Other special environments.

 Precautions before installation

 Decide the correct way of conveying the equipment.

 If the unit has to be installed on a metal part of the building, electric insulation must be

installed, and the installation must meet the relevant technical standards for electric
devices.

4.3 Dimensions and service space

Before installing the unit, reserve the space of maintenance shown in the following figure.

The dimensions of the water tank as following figure.

4.4 Installation Of The Sanitary Hot Water Tank

CAUTION:

The total System (Indoor unit and outdoor unit) is designed for combination with a sanitary hot
water tank. In case another tank is being used in combination with the indoor unit we cannot
guarantee neither good operation nor reliability of the system. For those reasons we cannot give
warranty of the system in such case.

 Only this tank can be used in combination with the solar kit option.
 Sanitary hot water quality must be according to EN directive98/83 EC.
 A drain device should be installed on the cold water connection on the sanitary hot water

tank.

 For safety reasons, it is not allowed to add ethylene glycol to the water circuit. Adding

ethylene glycol might lead to contamination of the sanitary water if a leakage would occur
in the heat exchanger coil.

 It is important that the storage capacity of the sanitary hot water tank meets normal daily

fluctuations In consumption of sanitary hot water without any fall of the water outlet
temperature during use.

 Immediately after installation, the sanitary hot water tank must be flushed with fresh water.

This procedure must be repeated at least once a day the first 5 consecutive days after
installation.

At holiday residences or at houses that are occasionally not occupied, the sanitary hot water tank
installation must be fitted with a shunt pump.

 The shunt pump can be time-controlled.
 The shunt pump must operate to circulate the complete volume of the sanitary hot water

tank 1.5 times per hour.

 And the shunt pump must operate or be programmed for operation. during 2 uninterrupted

hours per day at least.

In case of very long field water piping between the sanitary hot water tank and the hot water
end point (shower. bath. etc.) it can take more time before the hot water from the sanitary hot
water tank reaches the hot water end point.

If required connect a recirculation pump in between the hot water end point and the outlet pipe
in the sanitary hot water tank.

4.5 Piping Connection

Pipeline Connection Sketch

Caution:

When install the main unit, please set a drain valve at the drain orifice of the unit by self.

Pipeline Connection Explanation

 Installation of the water inlet or outlet pipes: The spec of the water inlet or outlet thread is

RC3/4” (internal thread). Pipes must be heat-resistant and durable.

 Installation of the pipe for PT valve: The specification of the valve connecting thread is RC3/4”

(internal thread). After installation, it must be confirmed that the drainpipe outlet is exposed in
the air. When flexible drainpipe is jointed to the pressure relief orifice of this valve, it must be
confirmed that the flexible drainpipe is downwards vertically and exposed in the air.

NOTE:

 A safety valve should be installed at the water inlet of the unit.
 The handle of PT Valve should be pulled out once per half year, to

make sure that there is no jam of the valve.
Please beware of burn, because of the high temperature of water.

The drainage pipe should be well installed ,in order to avoid
freezing up in cold weather.

 Do not press the handle of PT Valve,
 Do not dismantle the PT Valve,
 Do not block off the Drainage pipe, It will cause explosion and injury,

if do not comply with the above instruction.

 Installation of the one way valve: The specification of the one way valve thread in accessories

is RC3/4”. It is used to prevent backflow of water.

 Installation of the Y-shaped filter: The spec of the Y-shaped filter thread in accessories is

RC3/4”. It is used to filtrate inlet water.

 After all the pipes installed turn on the cool water inlet and hot water outlet and start effusing

the tank. When there is water normally flowing out from water outlet, the tank is full. Turn off all
valves and check all pipes. If there is any leakage, please repair.

 If the inlet water pressure is less than 0.15MPa, a pressure pump should be installed at the

water inlet. For guarantee the long safety using age of tank at the condition of water supply
hydraulic higher than 0.65MPa, a reducing valve should be mounted at the water inlet pipe.

5 Filed wiring

CAUTION:

 Please select power source for indoor unit and outdoor unit respectively.
 The power supply has specified branch circuit with leakage protector and manual switch.
 For LRSJF-V120/SN1-610 and LRSJF-V140/SN1-610，indoor unit and outdoor unit both

connect with power supply which is 380-415V 50Hz.

 Use 3-core screened wire as indoor and outdoor control wire.
 The installation should comply with relevant national electric standard.
 Power wiring should be engaged by specialized electrician

5.1 Outdoor unit wiring

■ Field wiring guidelines

 Most field wiring on the indoor unit side is to be made on the terminal block inside the control

box. To gain access to the terminal block, remove the indoor unit cover and control box
service panel.

 Cable tie mountings are provided at the bottom of the control box. Fix all cables using cable

ties (field supply).

 A dedicated power circuit is required for the auxiliary heater.
 Installations equipped with a sanitary hot water tank (optional), require a dedicated power

circuit for the electric heater. Please refer to the sanitary hot water installation manual.

1) The Specification of Power

Model

LRSJF-V120/SN1-610
LRSJF-V140/SN1-610

Outdoor Unit Power

Phase

3 Phase

Voltage and Frequency

380-415V~ 50Hz

Power Wiring (mm2)

5X2.5

Circuit Breaker (A)

25

Indoor unit/Outdoor unit Signal wire (mm2) (Weak
electric signal)

3-core shielded wire

3 X 0.5

Caution:

 Equipment complying with IEC 61000-3-12.
 A disconnection device having an air gap contact separation in all active conductors should be

incorporated in the fixed wiring according to the National Wiring Regulation.

2) Outdoor unit wiring diagram

5.2 Indoor unit wiring

1) The Specification of Power

Model

SMK-120/CSD80GN1
SMK-140/CSD80GN1

Indoor Unit Power
Phase

3 Phase

Voltage and Frequency

380-415V~ 50Hz

Power Wiring (mm2)

5X4.0

Circuit Breaker (A)

32

Indoor unit/Outdoor unit Signal wire (mm2) (Weak
electric signal)

3-core shielded wire
3 X 0.5

2) Indoor unit wiring diagram

Cable specification

NO

Description

Require number of core

Section of the conductor

1

Power supply cable for indoor unit

3+GND

4 mm2

2

Temperature sensor cable

2

—

3

Power supply cable from indoor unit to
Sanitary hot water tank

2

2.5 mm2

4

Power supply cable for Pump of solar kit

2+GND

1.0 mm2

(Pump 3)

5

Power supply cable for motorized 2-way
valve, SV3

3

1.0 mm2

6

Power supply cable for motorized 2-way

-valve, SV2

3

1.0 mm2

7

Power supply cable for motorized 2-way
valve, SV1

3

1.0 mm2

8

Power supply cable for auxiliary pump
(Pump2)

2+GND

1.0 mm2

9

Communication cable between indoor unit
and boiler

2

1.0 mm2

10

Room thermostat cable

4(L, N, C, H)

1.0 mm2

11

Communication cable between indoor unit
and outdoor unit

3 (P, Q, E)

3×0.5 mm2

(3 -Shield wire)

12

Power supply cable for outdoor unit

2+GND

4.0 mm2

13

Power supply cable for solar pump station

2+GND

1.0 mm2

14

Power supply cable for the pump of solar
kit

2+GND

1.0 mm2

15

Signal input from solar pump station to
indoor unit

2

1.0 mm2

16

Power supply cable for the pump of solar
kit

2+GND

1.0 mm2

17

Sanitary hot water tank temperature
sensor cable

2

—

18

Sanitary hot water tank temperature
sensor cable

2

—

19

Water circuit temperature senor T1B cable

2

—

 Connection of the indoor unit power supply and communication cable Power circuit

and cable requirements

● Power supply for the indoor units is to be provided through the indoor side. Data
communication with the outdoor unit is provided through the cable which labeled as P, Q, E.

● For all guidelines and specifications regarding field wiring between the indoor unit and the
outdoor unit, please refer to the outdoor unit installation manual.

● Using the appropriate cable, connect the power circuit to the appropriate terminals as shown
on the wiring diagram and the illustration below.

● Connect the earth conductor (yellow/green) to the earthing screw on the control box mounting
plate.

● Fix the cable with cable ties to the cable tie mountings to ensure strain relief.

● When routing out cables, make sure that these do not obstruct mounting of the indoor unit

cover.

 Connection of the auxiliary heater power supply Power circuit and cable requirements

 This power circuit must be protected with the required safety devices according to local and

national regulations. Select the power cable in accordance with relevant local and national
regulations.

 Using the appropriate cable, connect the power circuit to the appropriate terminals as shown

on the wiring diagram.

 Connect the earth conductor (yellow/green) to the earth screw on the block terminal. Fix the

cable with cable ties to the cable tie mountings to ensure strain relief.

CAUTION:

Be sure to use a dedicated power circuit for the auxiliary heater. Never use a power circuit
shared by another appliance.

 Connection of the thermostat cable

Connection of the thermostat cable depends on the application.
See section7.2 “Room thermostat installation configuration” for more information and
configuration options on pump configuration in combination with room thermostat.

● Thermostat requirements

1. Power supply: 220-240V~ 50Hz or battery operated

2. Contact voltage: 220-240V~ 50Hz

● Procedure

1. Connection of the thermostat cable to the appropriate terminals shown on the wiring diagram.

2. Fix the cable with cable ties to the cable tie mountings to ensure strain relief.

3. Set the “Field setting ” about the selection of Room Thermostat.

 Connection of the valve cable

Valve requirements

1. Power supply: 220-240V~ 50Hz

2. Maximum running current: 100mA

Wiring the 2-way valve

1. Using the appropriate cable, connect the valve control cable to the terminal as shown
on the wiring diagram.

NOTE:

Wiring is different for a NC (normal closed) valve and a NO (normal open) valve. Make sure to
connect to the correct terminal numbers as detailed on the wiring diagram and illustrations below.

NOTE:

For the NC (normal closed) valve, it is necessary to reverse the terminal 4 and 5, 7 and 8, 10 and
11 to get the right opening and closing of the valve.

2. Fix the cable(s) with cable ties to the cable tie mountings to ensure strain relief.

 Electrical Connection of Water Pump

Water pump specification:
Power supply: 220-240V~ 50Hz
Maximum running current: 2A
 Using the appropriate cable, connected the

pump cable to the terminals

 Fix the cable with cable ties to the cable tie mountings to ensure

strain relief.

 Electrical Connection of Anti-frozen electric heater (Reserved)
 Electrical Connection of External Heat Source

Using the appropriate cable, and connect the control terminal of heat source such as gas boiler
etc., the control terminal of this unit is 25-26 terminals in the connector base.

NOTE:

This control terminal of the indoor unit only outputs one switch signal; it needs to change wiring
when matching with different external heat sources.
The signal wire connected the solar energy pump with hydraulic module need to be increased
protection, such as fuse, for avoiding the abnormal operation lead to the device damage.

1. If the external heat source need some switch signal to control the
input situation, then directly connect the corresponding wire terminal
of this machine with the corresponding terminals of the external heat
source.

2. If the external heat source needs one control signal of the
specified voltage (such as 220-240V~ 50Hz), then it need to

supply the control terminal25 and 26 with corresponding
power.

 External Wiring of Operation/ Fault

● The terminal 27 and 28 will be conducted when the unit is running, and will be

disconnected when the unit is turned off or stood by.

● The terminal 29 and 30 will be conducted when there is a running fault, and be disconnected

when the unit is running correctly.

● The connection is described in the following figure.

 Remote ON/OFF Terminal

“A B” terminal is used for remote ON/OFF switch; it needs to connect external control switch,
the control logic as follow:

The connection is described in the following figure.

 The wiring terminal diagram as following figure:

5.3 Solar kit wiring

 The solar pump station will have an auxiliary contact that closes when the contact for the

pump of the solar pump station is operated.

 This contact will provide 220-240V~ 50Hz to the input of the indoor unit, and prevent sanitary

water heating by the heat pump and/or electric heater during solar heating.
 For wiring examples refer to the following drawings.
If the solar energy pump cannot set the sanitary hot water tank temperature below 60℃, then use

the connecting method as shown below.

.
If the solar energy pump can set the sanitary hot water tank temperature below 60℃ , then use
the connecting method as shown below.

Caution:

If the pump station has a speed controlled pump, make sure to disable this function so that the
indoor PCB receives 220-240V~ 50Hz at all times.

5.4 Sanitary water tank wiring

 A main or other means for disconnection, having a contact act separation in all poles, must be

incorporated in the fixed wiring in accordance with relevant local and national legislation.

 All field wiring and components must be installed by a licensed electrician and must comply

with relevant European and national regulations

 The field wiring must be carried out in accordance with the wiring diagram supplied with the

unit and the instructions given below.

 The sanitary hot water tank must be earthed via the indoor unit.

 Power circuit and cable requirements

CAUTION:

 Be sure to use a dedicated power circuit. Never use a power circuit shared by another

appliance.

 Select the power cable in accordance with relevant local and national regulations.
 Make sure all field wiring is insulated from the tank body and heater element or can resist

temperatures to 90℃

 Thermistor cable

The distance between the thermistor cable and power supply cable must always be at least 5 cm
to prevent electromagnetic interference on the thermistor cable.

 Connections to be made in the sanitary hot water tank electrical box

M-thermal technical manual – part 3

Part 3

Test running and maintenance

1 Pre-test and test running ............................................................................................................................................. 2

1.1 Checks before initial start-up ...................................................................................................................... 2

1.2 Powering up the indoor unit ........................................................................................................................ 3

2 Setting the pump speed .............................................................................................................................................. 3

3 Field Settings ................................................................................................................................................................ 3

3.1 Wired controller .............................................................................................................................................. 4

a) The basic controller functions are: ..................................................................................................................... 4

 Turning the unit ON/OFF ..................................................................................................................................... 4

 Operation mode change-over: ............................................................................................................................ 4

 Space heating ....................................................................................................................................................... 4

 Space cooling ....................................................................................................................................................... 4

 Sanitary water heating ......................................................................................................................................... 4

 Space heating & Sanitary water heating ........................................................................................................... 4

 Space cooling & sanitary water heating ............................................................................................................ 4

 Selection of features: ........................................................................................................................................... 4

 Silent mode ........................................................................................................................................................... 4

 Run test function ................................................................................................................................................... 4

 Air purge function ................................................................................................................................................. 4

Note: ............................................................................................................................................................................... 4

The functions “space cooling”, “space heating” and “sanitary water heating” can only be selected when the

corresponding equipment is installed. ....................................................................................................................... 4

b) Clock function ....................................................................................................................................................... 4

The clock functions are: .............................................................................................................................................. 4

 24 hour real time clock ........................................................................................................................................ 4

 Day of the week indicator .................................................................................................................................... 4

 ..................................................................................................................................................................................... 4

c) Schedule timer function ....................................................................................................................................... 4

The schedule timer function allows the user to schedule the operation of the installation according to a daily

or a weekly program. ................................................................................................................................................... 4

d) Name and function of button............................................................................................................................... 5

e) Name and function of icon .................................................................................................................................. 6

3.2 Setting Procedure .......................................................................................................................................... 7

3.3 Detailed description ...................................................................................................................................... 7

3.4 Field setting table ......................................................................................................................................... 10

4 Maintenance ................................................................................................................................................................ 11

M-thermal technical manual – part 3

1 Pre-test and test running

1.1 Checks before initial start-up

Warning:

 Switch off the power supply before making any connections.
 Test running can not start until the outdoor unit has been connected to the power for 12 hours.
 Test running can not start until all the valves are affirmed open.
 Never force to run. (Or the protector sits back, danger will occur.)

After the installation of the unit, check the following before switching on the circuit
breaker:

A. Field wiring

Make sure that the field wiring between local supply panel and indoor unit, outdoor unit and
indoor unit, indoor unit and valves (when applicable), indoor unit and room thermostat (when
applicable), and indoor unit and sanitary hot water tank has been connected correctly. The wiring
diagrams should be according to European and national regulations.

B. Fuses or protection devices

Check that the fuses or the locally installed protection devices are of the right size and type.
Make sure that neither a fuse nor a protection device has been bypassed.

C. Electric heater circuit breaker

Do not forget to turn on the electric heater circuit breaker in the control box (applies only to units
with optional sanitary hot water tank installed).

D. Earth wiring

Make sure that the earth wires have been connected properly and that the earth terminals are
tightened.

E. Internal wiring

Visually check the control box on loose connections or damaged electrical components.

F. Fixation

Check that the unit is properly fixed, to avoid abnormal noises and vibrations when starting up the
unit.

G. Damaged equipment

Check the inside of the unit on damaged components or squeezed pipes.

H. Refrigerant leak

Check the inside of the unit on refrigerant leakage. If there is a refrigerant leak, call your local
dealer.

I. Power supply voltage

Check the power supply voltage on the local supply panel. The voltage must correspond to the
voltage on the identification label of the unit.

J. Air purge valve

Make sure the air purge valve is open (at least 2 turns).

K. Pressure relief valve

Check if the auxiliary heater vessel is completely filled with water by operating the pressure relief
valves. It should purge water instead of air.

L. Shut-off valves

Make sure that the shut-off valves are correctly installed and fully open
.

Before switch on the unit, read following recommendations:

■ When the complete installation and all necessary settings have been carried out, close all front
panels of the unit and refit the indoor unit cover.

M-thermal technical manual – part 3

■ The service panel of the control box may only be opened by a licensed electrician for
maintenance purposes.

1.2 Powering up the indoor unit

When power supply to the indoor unit is turned on, “0” is displayed on the user interface during
its initialization, which might take up to 30 seconds. During this process the user interface cannot
be operated.

2 Setting the pump speed

The pump speed can be selected on the pump.
The default setting is high speed. If the water flow in the system is too high (e.g., noise of running
water in the installation) the speed can be set to low speed.

Note: The speed dial on the pump indicates 3 speed setting.

The available external static pressure (ESP, expressed in mmH2O) in function of the water flow
(l/min) is shown in the previous section.

CAUTION:

If the external pressure loss of the water circuit is too high, it is necessary to install an auxiliary
pump. Fail to install an auxiliary pump will result in cooling/heating capacity reduction.

3 Field Settings

The indoor unit should be configured by the installer to match the installation environment
(outdoor climate, installed options, etc.) and user demand. These field settings are accessible and
programmable through the user interface on the indoor unit.
Each field setting is assigned a 4-digit number or code, for example, “3-1-15”, which is indicated
on the user interface display. The first digit “3” indicates the “first code” or field setting group.
The second digit indicates the second code. The last 2-digit number “15” indicate the value of
code “3-1”.

M-thermal technical manual – part 3

A list of all field settings and default values is given under “Field settings table” . In this same list,
we provided for 2 columns to register the date and value of altered field settings at variance with
the default value.

3.1 Wired controller

a) The basic controller functions are:

 Turning the unit ON/OFF
 Operation mode change-over:
 Space heating
 Space cooling
 Sanitary water heating
 Space heating & Sanitary water heating
 Space cooling & sanitary water heating
 Selection of features:
 Silent mode
 Run test function
 Air purge function

Note:
The functions “space cooling”, “space heating” and “sanitary water heating” can only be
selected when the corresponding equipment is installed.

b) Clock function

The clock functions are:

 24 hour real time clock
 Day of the week indicator


c) Schedule timer function

The schedule timer function allows the user to schedule the operation of the installation
according to a daily or a weekly program.

M-thermal technical manual – part 3

d) Name and function of button

Button

Name

Function

Cooling/Heating
ON/OFF button

Starts or stops the heating or cooling function of the unit.

Weekly schedule timer
button

Enable/disable the schedule time and use to program the
controller.

Silent mode button

Enable or disable silent mode
Clock setting button

Enable or disenable clock setting

Sanitary water heating
button

Enable or disable heating of the sanitary water

Sanitary hot water
temperature setting
button

Enable or disable sanitary water temperature setting

Space cooling/Space
heating button

This button allows manual switching between cooling or
heating mode.

Space cooling/Space
heating temperature
setting button

Enable or disable space cooling/space heating temperature
setting

Menu button

Enable and disable menu setting function of the controller
Check button

Enables and disenable the checking function of the
controller.

Page up button

This button is used for page up function

Page down button

This button is used for page down function

Increasing button

This button is used for increasing the current value

Decreasing button

This button is used for decreasing the current value

Confirm button

Press this button to confirm the change.

Lock button

Press this button for locking all other buttons.

Reset button

Reset the wire controller and return to factory default
settings.

M-thermal technical manual – part 3

e) Name and function of icon

Icon

Name

Function

Spacing cooling mode
icon

This icon indicates the current operation mode is space
cooling.

Spacing heating mode
icon

This icon indicates the current operation mode is space
heating.

Sanitary water heating
icon

This icon indicates the current operation mode is
sanitary water heating.

Pump icon

This icon indicates that the circulation pump is running.

Compressor icon

This icon indicates that the compressor in the outdoor
unit is active.

Silent mode icon

This icon indicates the current operation mode is silent
mode.

Disinfection icon

This icon indicates that the disinfection mode is active.

Defrost icon

This icon indicates that the defrost mode is active.

Anti-freezing icon

This icon indicates that the anti-freezing mode is active.

Weekly schedule
timer icon

These icons indicate the operation and the date of the
weekly schedule timer.

Sanitary water tank
electric heater icon

This icon indicates that the electric heater of the sanitary
water tank is active.

First stage auxiliary
heater icon

This icon indicates that the first stage auxiliary heater of
the indoor unit is operating when there is a high demand
for heating capacity.

Second stage
auxiliary heater icon

This icon indicates that the second stage auxiliary
heater of the indoor unit is operating when there is a
high demand for heating capacity.

Setting temperature
display

The display shows the current set temperature of the
installation.

Display temperature

The display also used to shows the water outlet
temperature of indoor unit when there is no button press
operation.

External heat source
icon

External heat source includes solar energy, gas boiler,
etc. These icons indicate that external heat source(s) is
(are) installed.

Room thermostat icon

This icon indicates that an external room thermostat
with higher priority is controlling your installation.

M-thermal technical manual – part 3

Clock display

The clock display shows the current time.

Menu code and value
display

The first code and the second represent the first level
and the second level menu from the field set list.
The last two numbers indicate the value of the first and
the second code.

Operation lamp

The operation lamp lights in each mode.

Space cooling &
sanitary water heating
icon

These two icons indicate the current operation mode are
space cooling and sanitary water heating.

Space heating &
sanitary water heating
icon

These two icons indicate the current operation mode are
space heating and sanitary water heating.

Schedule timer OFF
icon

This icon indicates all the operations of the schedule
timer are inactive.

Lock icon

This icon indicates all the buttons of the controller are
locked except button

Not available icon

This icon is displayed whenever non-installed option is
addressed or a function is not available.

3.2 Setting Procedure

1 Press the button to enter FIELD SET MODE .

The SETTING icon will be displayed. The current selected field setting code is indicated “8-8-88”,
with the set value displayed as the last 2-digit number.

2 Press the button to select the appropriate field setting first code.

3 Press the button to select the appropriate field setting second code.

4 Press the and button to change the set value of the select field setting.

5 Save the new value by pressing the button.
6 Repeat step 2 through 4 to change other field settings as required.

7 When finished, press the button for the second time to exit.

Note: Please read the manual carefully to understand how to operate wire controller

3.3 Detailed description

a) Basic option

This part of field setting determines the basic option of the heat pump system, so that the control system can
select the appropriate control mode.

 “0-0” Under floor heating terminal: defines whether the system installations with under floor

M-thermal technical manual – part 3

heating “1” or not “0”.

 “0-1” Fan coil: defines whether the system installations with fan coil “1” or not “0”.
 “0-2” Sanitary hot water tank: Defines whether the system installations with sanitary hot water

tank “1” or not “0”.

 “0-3” Electric heater for sanitary hot water tank: Defines whether an electric heater was

assembled in the sanitary hot water tank “1” or not “0”.

 “0-4” Auxiliary heating source: Defines whether there is a boiler as an auxiliary heating source

for the system “1” or not “0”.

 “0-5” Solar kit: Defines whether there is a solar kit to heating the sanitary hot water tank “1” or

not “0”.

 “0-6” auxiliary heater: Defines whether there are electric heaters assembled in the indoor unit

“1” or not “0”.

 “0-7” Room thermostat: Defines whether there is a room thermostat connected with the indoor

unit “1” or not “0”.

 “0-8” Fan coil function: Function of the fan coil,"0"for cooling only,"1" for heating and cooling.

b) Priority

This part defines the priority of space heating, space cooling and sanitary hot water tank heating.

“1-0” Space heating and sanitary heating priority: Defines the priority of space heating and

sanitary heating, “0” for sanitary heating priority, “1” for space heating priority, and “2” means

space heating and sanitary heating have the same priority.

“1-1” Space cooling and sanitary heating priority: defines the priority of space cooling and sanitary
heating, “0” for sanitary heating priority, “1” for space cooling priority.

“1-2” Heat pump maximum running period for sanitary water tank heating: Specifies the
maximum time period during which sanitary water tank heating can be activated, even when the
target sanitary hot water temperature has not yet been reached..

“1-3” Solar heating priority: defines the priority sanitary hot water tank heating by solar kit “1” or by
heat pump & electric heater “0”.

■ Disinfection function

Apply only to installations with a sanitary hot water tank.
The disinfection function disinfects the sanitary hot water tank by periodically heating the sanitary
water to a specific temperature.
The disinfection function field settings must be configured by the installer according to national
and local regulations.

“2-0” Operation interval: Day of a week, the sanitary water should be heated.
“2-1” Status: Defines whether the disinfection function is turned on (1) or off (0).
“2-2” Start time: Defines the time of the day at which the sanitary water should be heated.
“2-3” Set point: Defines the hot water temperature to be reached when disinfection function.
“2-4” Interval: Time period defining how long the set point temperature should be maintained.

■ Auxiliary heating source operation
“3-0” Temperature difference: Defines the temperature difference between the set temperature

and the outlet temperature of indoor unit, above which the auxiliary heating source such as boiler
may be turned on.
“3-1” Interval: Defines the time period after which the auxiliary heating source such as boiler
may be turned on.
“3-2” Outdoor temperature: Defines the outdoor temperature below which the auxiliary heating
source such as boiler operation may be allowed.
“3-3” Floor heating inlet temperature: Defines the temperature below which the under floor

M-thermal technical manual – part 3

heating may be allowed.

■ Electric heater & HP priority

Apply only to installations with a sanitary hot water tank.
“4-0” Electric heater delay time: Defines the time period behind which the electric heater of the
sanitary hot water tank will be turned on.
“4-1” Heat pump start temperature difference: Defines the temperature difference between set
temperature and water tank temperature, below which heat pump turning on will be allowed.
“4-2” Set point correction for sanitary hot water tank temperature: The temperature difference
above the set temperature when the electric heater to be powered on.

■ Auxiliary heater operation
“5-0” Auxiliary heater delay time: Defines the time period behind which the auxiliary heater of

the indoor unit will be turned on.
“5-1” Auxiliary heater turn on temperature difference 1: Defines the temperature difference
between set temperature and water outlet temperature of indoor unit, below which one of the
auxiliary heaters will be turned on.
“5-2” Auxiliary heater turn on temperature difference 2: Defines the temperature difference
between set temperature and water tank temperature, below which both of the auxiliary heaters
will be turned on.
“5-3” Auxiliary heater turn on outdoor temperature: Specifies the outdoor temperature below
which the auxiliary heater may turn on.

■ Cooling and heating set point range

The purpose of this field setting is to prevent the user from selecting a wrong (i.e., too hot or too
cold) leaving water temperature. Thereto the heating temperature set point range and the cooling
temperature set point range available to the user can be configured.

“6-0” Cooling set point upper limit: Maximum leaving water temperature for cooling operation.
“6-1” Cooling set point lower limit: Minimum leaving water temperature for cooling operation.
“6-2” Heating set point upper limit: Maximum leaving water temperature for heating operation.
“6-3” Heating set point lower limit: Minimum leaving water temperature for heating operation.
“6-4” Sanitary heating set point upper limit: Maximum leaving water temperature for sanitary

heating operation.
“6-5” Sanitary heating set point lower limit: Minimum leaving water temperature for sanitary
heating operation.

■ Others

“7-0” Celsius/Fahrenheit switching: “0” for Celsius, and “1” for Fahrenheit.
“7-1” Silent mode running period: Defines the running period of silent mode.
“7-2” Run test function: “0” for run test function disable, and “1” for run test function disable.
“7-3” Run test period: Specifies the period of run test.
“7-4” Under floor first time heating function: “0” for disable and “1” for enable.
“7-5” Air purge function: “0” for disable and “1” for enable.

M-thermal technical manual – part 3

3.4 Field setting table

M-thermal technical manual – part 3

4 Maintenance

In order to ensure optimal availability of the unit, a number of checks and inspections on the unit
and the field wiring have to be carried out at regular intervals.

Caution:

Before carrying out any maintenance or repair activity, always switch off the circuit breaker on

the supply panel, remove the fuse or open the protection devices of the unit.

Make sure that before starting any maintenance or repair activity, also the power supply to the

outdoor unit is switched off.

The described checks must be executed at least once a year:

a) Water pressure

Check if the water pressure is above 0.3 bar. If necessary add water.

b) Water filter

Clean the water filter.

c) Water pressure relief valve

Check for correct operation of the pressure relief valve by turning the red knob along the valve

counter-clockwise:

1. If you do not hear a clacking sound, contact your local dealer.

2. In case the water keeps running out of the unit, close both the water inlet and outlet shut-off

valves first and then contact your local dealer.

d) Pressure relief valve hose

Check that the pressure relief valve hose is positioned appropriately to drain the water.

If the drain pan kit is installed, make sure that the pressure relief valve hose end is positioned in

the drain pan.

e) Auxiliary heater vessel insulation cover

Check that the auxiliary heater insulation cover is fastened tightly around the auxiliary heater

vessel.

f) Sanitary hot water tank pressure relief valve (field supply)

Apply only to the system which installs a sanitary water tank.

Check for correct operation of the pressure relief valve on the sanitary hot water tank.

g) Sanitary hot water electric heater

Apply only to the system which installs a sanitary water tank.

It is advisable to remove lime buildup on the electric heater to extend its life span, especially in

regions with hot water. To do so, drain the sanitary hot water tank, remove the electric heater

from the sanitary hot water tank and immerse in a bucket (or similar) with lime-removing product

for 24 hours.

h) Indoor unit control box

1. Carry out a through visual inspection of the control box and look for obvious defects such as

loose connections or defective wiring.

2. Check for correct operation of contactors by the use of an ohmmeter. All of these contactors

must be in open position.

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

Part 4 trouble shooting

1. Normal Phenomenon ................................................................................................................................................ 2

2. M-thermal system protection in Common ........................................................................................................... 3

3. Trouble and causes of heat pump ......................................................................................................................... 3

4. Malfunction Code and Troubleshooting ............................................................................................................... 4

4.1 Outdoor unit malfunction Code and troubleshooting .......................................................................... 4

A. "E0": Outdoor unit EEPROM malfunction ...................................................................................... 5

B. "E2": Communication error of the outdoor chip and the indoor chip ............................................. 6

C. "E3": Communication error of outdoor chip and DSP ................................................................... 7

D. "E4": Outdoor temperature sensor error ............................................................................................... 8

E. "E5": Voltage protection error ................................................................................................................. 9

F. "E6": Direct-current fan error ................................................................................................................ 10

G. "P1": High pressure protection .................................................................................................... 11

H. "P2": Low pressure protection ..................................................................................................... 12

4.2 Hydraulic indoor unit malfunction Code and trouble shooting ....................................................... 13

A. "E0" "E8": Flow switch error ........................................................................................................ 14

B. “E1 E3 E4 E5 E6 E7 E8 E9 EA Eb”: Temperature sensor error .................................................. 15

C. "E2": UI communication error ...................................................................................................... 16

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

1. Normal Phenomenon

1.1 The heat pump does not start immediately after the ON/OFF button on the

remote controller is pressed.

 If the operation lamp lights, the system is in normal condition. To prevent overloading of the compressor

motor, the heat pump starts 3 minutes after it is turned ON.

 If the operation lamp and the "PRE-DEF indicator (cooling and heating type) or fan only indicator (cooling

only type)" light, it means you choose the heating model.

1.2 Change into the Pump mode during heating mode

When the outlet water temperature drops to the setting temperature, the compressor goes off and the indoor
unit changes to pump mode; when the temperature rises up, the compressor starts again. It is the same with
heating mode.

1.3 White mist comes out of outdoor unit

When the system is changed over to heating operation after defrost operation Moisture generated by defrost
becomes steam and is exhausted.

1.4 Noise of heat pump’s cooling

 A continuous low hissing sound is heard when the system is in operation.

This is the sound of refrigerant gas flowing through both indoor and outdoor units.

 A hissing sound will be heard at the start or immediately after stopping operation or defrost operation.

This is the noise of refrigerant caused by flow stop or flow change.

 If the tone of operating noise changes, this noise is caused by the change of compressor’s frequency.

1.5 Dust comes out of the unit

If the unit is not run for a long time, the dust has gotten into the unit.

1.6 The units can give off odors

The unit can absorb the smell of rooms, furniture, cigarettes etc., and then emit it again.

1.7 The outdoor unit fan does not spin

The speed of the fan is controlled in order to optimize product operation.
In heating mode, when the system defrosting, the fan of outdoor unit will stop

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

2. M-thermal system protection in Common

2.1 Compressor protection.
When the power is on, or the machine stops then restarts right away, outdoor unit will run in 3 minutes to protect
the compressor from too frequent starts and stops.

2.2 When the protection device functions, running stops. Refer to the following:
① Forced to start but not possess the start article, and display light lights.
② When the operation mode is cooling, inlet and outlet of outdoor unit are blocked, outside strong air blows

into outdoor unit’s outlet.
③ When heating running, dust adheres to air filter to block inlet or outlet of outdoor unit.
Note: when protecting, please cut the manual power switch. After checking the reason and solving it, restart.

2.3 Power fails.
① If the power supply fails while machine is running normally, system will record this.
② When the machine is powered on again, the running light of wire controller would flash to inform user
about this.

③ Press the on/off key of wire controller to confirm this before restart the system.

Note: When running, if system takes place mistaken operation or lighter, please pull down the power supply
switch to cut it off. Before restarting machines, please press the on/off key again as above.

3. Trouble and causes of heat pump

If one of the following malfunctions occur, stop operation, shut off the power, and contact with your dealer.

 The lamp is flashing rapidly after turn off the power and turn on again.
 Remote controller receives malfunction or the button does not work well.
 A safety device such as a fuse, a breaker frequently actuates.
 Obstacles and water enter the unit.
 Water leaks from indoor unit.
 Other malfunctions.

If the system does not properly operate except the cases above mentioned or the malfunction above mentioned
is evident, investigate the system according to the following procedures.

Symptom

Causes

Solution

Unit does not start

 Power failure.
 Power switch is off.
 Fuse of power switch may have burned.
 Batteries of remote controller exhausted

or other problem of controller.

 Wait for the comeback of power.
 Switch on the power.
 Replace Location:
 Replace the batteries or check the

controller.

Water flowing normally but
completely can't cooling

 Temperature is not set correctly.
 Be in 3 minutes protection of

compressor.

 Set the temperature properly.
 Wait.

Units start or stop
frequently

 Refrigerant is too little or too much.
 Air or no concreting gas in the system
 Compressor is malfunction.
 Voltage is too high or too low.
 System circuit is blocked.

 Check leakage, recharge refrigerant.
 Vacuum and recharge refrigerant.
 Maintenance or change compressor.
 Install manostat.
 Find reasons and solution.

Low cooling effect

 Outdoor unit and indoor unit heat

 Clean the heat exchanger.

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

exchanger is dirty.

 The water filter is dirty.
 Inlet/outlet of indoor/outdoor units is

blocked.

 Sunlight shines directly.
 Too much heat resource.
 Outdoor temp. is too high.
 Leakage of refrigerant or lack of

refrigerant.

 Clean the water filter.
 Eliminate all dirties and make air

smooth.

 Make curtains in order to shelter from
 sunshine.
 Reduce heat source.
 AC cooling capacity reduces

(normal).

 Check leakage and rightly recharge

refrigerant.

Low heating effect

Outdoor temperature is lower than 7℃
Leakage of refrigerant or lack of refrigerant.

 Use heating device.
 Check leakage and rightly recharge

refrigerant.

4. Malfunction Code and Troubleshooting

If there is phenomenon as follows, please stop running and cut power supply and refer to the following.
If the problem still appears, please contact with your dealer and offer machine’s model and detailed malfunction.

4.1 Outdoor unit malfunction Code and troubleshooting

Display

Malfunction or Protection

E0

EEPROM error

E2

Communication error of the outdoor chip and the indoor chip

E3

Communication error

E4

T3, T4 sensor error

E5

Voltage protection error

E6

Direct-current fan error

E7

Heating fan error in the area A lasts for 5 minutes

E8

There are two times E6 error in 10 minutes(recovery will be after power off)

P0

The cooling fin high temperature protection

P1

High pressure protection

P2

Low pressure protection

P3

Compressor current protection

P4

Discharge temperature protection

P5

Outdoor condenser T3 high temperature protection

P6

Modules protection

P7

Evaporator T2 high temperature protection

P8

Typhoon protection

Display Function Instruction:

1. When stand by, LED displaying the amount of indoor units online which communicate with outdoor units.

2. When operation, LED displaying frequency value of compressor. 3. When defrost, LED displaying “dF”.

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

A. "E0": Outdoor unit EEPROM malfunction

Outdoor Unit
Display

E0

Method of
malfunction
detection

Check whether EEPROM is normal

Supposed
Causes

1. Something wrong with the outdoor unit PCB.

2. Something wrong with the EEPROM.

3. External factor other than malfunction.

Troubleshooting

E0

Turn the power supply off

once and then back on

Is normal reset

possible?

Turn the power supply off

and replace the EEPROM,

turn the power on again,

is”E0”displayed?

Problem could be cause by External

factor (noise, etc.) other than
malfunction

Replace the main control board.

Replace the EEPROM
YES

NO

YES

NO

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

B. "E2": Communication error of the outdoor chip and the indoor chip

Outdoor Unit
Display

E2

Method of
malfunction
detection

Check whether communication cable is normal

Supposed
Causes

1. Communication cable doesn’t connect well.

2. External factor other than malfunction.

Troubleshooting

E2

Turn the power supply off

once and then back on

Is normal reset

possible?

Turn the power supply off and

make sure the communication

cable is in well connection,

turn the power on again,

is”E2”displayed?

Problem could be cause by External

factor (noise, etc.) other than
malfunction

Replace the main control board.

Continue operation

YES

NO

YES

NO

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

C. "E3": Communication error of outdoor chip and DSP

Outdoor Unit
Display

E3

Method of
malfunction
detection

Check whether communication cable between chip and DSP is not connected
well.

Supposed
Causes

1. Communication cable between chip and DSP is not connected well..

2. External factor other than malfunction.

Troubleshooting

E3

Turn the power supply off

once and then back on

Is normal reset

possible?

Turn the power supply off and

connect the communication

cable correctly, turn the power

on again, is”E3”displayed?

Problem could be cause by External

factor (noise, etc.) other than
malfunction

Replace the main control board.

Continue operation

YES

NO

YES

NO

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

D. "E4": Outdoor temperature sensor error

Outdoor Unit
Display

E4

Method of
malfunction
detection

Check whether T3 and T4 temperature sensor cable are connected correctly.

Supposed
Causes

1. Temperature sensor cables don’t connect correctly.

2. The sensor terminal is loose.

3. The sensor circuit is short or open

4. The main control board's clamp diodes are short or open.

Troubleshooting

E4

Is T3 or T4 port on PCB

loose?

Temperature sensor
is short or defective.

The chip's pins do not match
correctly or the chip is defective.

, turn the power on again,

is”E4”displayed?

Insert the chip correctly or replace it with a

fine one

Replace the temperature sensor

Replace the main control
board.

YES

NO

YES

NO

Fasten the port.

YES

NO

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

E. "E5": Voltage protection error

Outdoor Unit
Display

E5

Method of
malfunction
detection

Check whether the power supply voltage is at normal range.

Supposed
Causes

1. The power supply voltage is too high or too low

2. Something wrong with the detecting element on the main board

Troubleshooting

E5

Measure the voltage, is at

the normal range?

Use a voltage regulator, adjust to

normal voltage,

turn the power on

again, is”E5”displayed?

Continue operation

YES

NO

Replace the main board

ON

YES

Replace the main board

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

F. "E6": Direct-current fan error

Outdoor Unit
Display

E6

Method of
malfunction
detection

Check whether the wire connection is correct.

Supposed
Causes

1. Fan wire is not connected well or correctly

2. Fan dose not run due to some matter tangled

3. Malfunction of the outdoor unit main board

4. Blowout of fuse

Troubleshooting

E5

Measure the voltage, is at

the normal range?

Check the fan motor connector

correctly connected to the
outdoor main board

Is there any matter around the

fan?

NO

YES

Properly connect the connector

YES

NO

Wait or use a voltage regulator

Remove the motor
connector

NO

Remove the matter

NO

Check the resistance value of the
motor

YES

Replace the motor

Is the fan ratable easily by hand?

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

G. "P1": High pressure protection

Outdoor Unit
Display

P1

Error
Explanation

The protection device circuit checks continuity in high pressure switch

Supposed
Causes

1. Refrigerant is excess.

2. Refrigerant does not loop smoothly.

3. The refrigerant loop contains air.

4. Control board is defective.

Troubleshooting

P1: High pressure protection (R22 refrigerant system protects

at 3.3Mpa, recovers at 2.4MPa; R410 refrigerant system

protects at 4.4MPa, recovers at 3.2MPa).

Heat exchanging of ODU is not efficient. This may be

caused by dirty heat exchanger, abnormal ODU fan
running, air flow keeping off to the heat exchanger,

ODU are too near to each other.

System's liquid refrigerant loop is blocked.
This may be caused by blocked valve, pressed
tube, closed blocked valve.

Refrigerant is excess. In this circumstance, the

refrigerant's low pressure is high, so is the
high pressure side, while the discharge

temperature is low.

System contains air or nitrogen. In this

circumstance, the high pressure is high, the
current is large, the discharge temperature is

high, compressor makes noise

Chip is defective or incorrectly installed. Or
the high pressure sensor is disconnected.

Control board is defective.

Check the system and fixed up
the error.

Check the system and get rid of the
block, and make the loop smooth.

Discharge part of the refrigerant.
Add some oil to the system if it

leaks during the discharge.

Discharge the refrigerant. Then vacuumize the

system and refill the refrigerant. Add oil to the

system if it leaks.

Reinstall the chip or replace it
with a fine one.

Replace the main control board.

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

H. "P2": Low pressure protection

Outdoor Unit
Display

P2

Error
Explanation

The protection device circuit checks continuity in low pressure switch

Supposed
Causes

1. Faulty low pressure switch

2. Refrigerant is not enough.

3. Refrigerant does not loop smoothly.

4. Efficiency of indoor heat exchange is low.

5. Control board is not defective.

Troubleshooting

P2: Low pressure protection (R22 refrigerant system protects

at 0.03Mpa, recovers at 0.1MPa; R410 refrigerant system
protects at 0.05MPa, recovers at 0.15MPa, or protects at

0.14MPa, recovers at 0.3MPa).

Refrigerant is not enough or the

system leaks refrigerant.

System's gas side is blocked. Phenomenon

may be discharge temperature is high, low
pressure is low, current is small. These are

caused by closed EXV valve, closed stop valve

or blocked filter.

Heat exchanger of IDU is inefficient, which

may be caused by the dirty exchanger or
filter, block of air flow, the fan not running

or running too slowly.

Chip is defective or incorrectly installed. Or
the low pressure sensor is disconnected.

Main control board is defective.

Reinstall the chip or replace it

with a fine one.

Replace the main
control board.

Check the system

over and eliminate

the obstacles.

Clear away the
block.

Add refrigerant or

fix up the system.

Clean the filter. If the

system is block by ice, the

system should also be clean.

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

4.2 Hydraulic indoor unit malfunction Code and troubleshooting

Display

Malfunction or Protection

E0

Flow switch error( continuous for 3 times, and should be reset by switch off the power supply )

E1

T2 error

E2

UI communication error

E3

Outdoor unit communication error

E4

T2B error

E5

T5 error

E6

T1 error

E7

T1B error

E8

Flow switch( one time)

E9

TW_in error

EA

TW_out error

Eb

T4 error

Ed

Phase protection

EE

EEPROM error

P0

T2 high temperature protection

P1

T2B low temperature protection

P2

TW_out high temperature protection

P3

TW_out low temperature protection

P4

TW_in high temperature protection

P5

T1 high temperature protection

P6

T1B high temperature protection

P7

Outdoor unit protection

P8

Sanitary hot water tank electric heater protection

P9

Auxiliary heater protection

Pb

Anti -freezing protection

Pc

Temperature controller error(result from the conflict between cool mode and heat mode)

t0~t7

Run test

dF

Defrost

d0

Oil return function

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

A. "E0" "E8": Flow switch error

Wire controller
Display

E0 E8

Error
Explanation

E0:Flow switch error( continuous for 3 times, and should be reset by switch off
the power supply )
E8:Flow switch error( one times)

Supposed
Causes

1. The wire terminal is loose or connected incorrectly.

2. The wire circuit is short or open.

3. The pump is not running

4. The main control board's clamp diodes are short or open.

Troubleshooting

E0

Check whether the wire
connected correctly or loose.

Is the wire circuit short or

open?

Turn on the power supply. Is the

water pump running?

Main control board is
defective.

Properly connect the wire.

Replace the flow switch
Check the wire connection or

replace the pump

Replace the main control
board.

NO

YES

NO

NO

YES

YES

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

B. “E1 E3 E4 E5 E6 E7 E8 E9 EA Eb”: Temperature sensor error

Wire
controller
Display

E1"E3 E4 E5 E6 E7 E8 E9 EA Eb

Method of
malfunction
detection

Malfunction is detected according to the temperature detected by each
temperature sensor.

Supposed
Causes

1. Temperature sensor cables don’t connect correctly.

2. The sensor terminal is loose.

3. The sensor circuit is short or open

4. The main control board's clamp diodes are short or open.

Troubleshooting

Error code

Is temperature port on PCB

loose?

Temperature sensor is
short or defective.

The chip's pins do not match
correctly or the chip is defective.

, turn the power on again, is the

code displayed?

Insert the chip correctly or replace it with a

fine one

Replace the temperature sensor

Replace the main control
board.

YES

NO

YES

NO

Fasten the port.

YES

NO

MCAC-RTSM-2012-07 M-thermal Technical Manual (part 4)

C. "E2": UI communication error

Wire
controller
Display

E2

Method of
malfunction
detection

Check whether communication cable is normal

Supposed
Causes

1. Communication cable doesn’t connect correctly.

2. External factor other than malfunction.

Troubleshooting

E2

Turn the power supply off

once and then back on

Is normal reset

possible?

Turn the power supply off and

make sure the communication

cable is in well connection,

turn the power on again,

is”E2”displayed?

Problem could be cause by External
factor (EMI, etc.) other than malfunction

Replace the main control board.

Continue operation

YES

NO

YES

NO