Ground sorce heat pump/water cooled water chiller
     

Introduction

Ground source heat pump is a high efficient and energy saving air conditioning system that provides cooling or heating by using the shallow layer geothermal source also refers as ground energy source including soil, groundwater, surface water etc.The ground surface is a enormous solar energy collector, which collects 47% of the total energy that arrives the earth, it’s more than 500times higher than the annual energy consumption by human being.

The ground energy source temperature is relatively stable in the whole year, it’s higher than ambient temp. in winter, and lower than ambient temp. in summer, that characteristic makes its energy efficiency is much more than the traditional system. With little premium energy (Electric energy) input, ground source heat pump transfers Low Temperature Thermal Energy into high temperature thermal. That is to say, Get the heat from ground and increase its temperature to supply heating to indoor space in winter, and get the heat from indoor space and release it into ground. The ground source heat pump usually gives 5KW cooling or heating capacity by using 1KW electricity.

Comparing with boiler (electricity or fuel) system, ground source heat pump saves 2/3 electricity, or 1/2 fuel energy; as the ground energy source temperature is relatively stable, it’s around 10 to , and it’s cooling, heating coefficient up to 4.8 to 5.5, it’s 40% higher than traditional air source heat pump, and its operation cost is 50% to 60% of the common central air conditioner.

Also, it has obvious environmental benefit; it can be installed in residential area, no combustion, no smoke, no waste.

Features

VWSN series ground source heat pump is the stable product developed by VICOT with the using of new technologies of international and domestic air conditioning industry, which is designed and produced according to international standard, adopting world famous high quality compressor, system accessories and computerized controller, with the reasonable match and structure design, it has following advantages:

1.Optimized design

The strong and weak electricity systems installed separately to ensure safety.

Flexible high pressure system makes it lifetime longer.

Several ways of getting energy:

 

1.Underground water      2Ground Surface water       3Underground piping loop

    
2.      Quality components selection:

Compressors and refrigeration accessories (such as dry filter, thermal expansion valve, liquid supply solenoid, liquid level mirror, high/low pressure control devices) all chosen world-renowned brand products to ensure that the unit reached an excellent level of performance

Using the most advanced DAE / DAC efficient heat transfer pipe, heat transfer surface with internal ribbed tube makes the heat transfer coefficient substantially increased; the heat exchanger unique structural design, the best way of copper tube layout and precision of refrigerant control technology, greatly improved the efficiency of heat transfer.

3.     

 

Simple and stable operation

       Perfect control

1) Computerized co ntrol with standby manual operation system

2) Compressor Operation timing

 

3) Compressor automatic start-up sequence,

4) Alarm signals

5) Alarm reset

6) Water temperature control

7) Manual reset high pressure switch, Automatic reset low pressure switch

        Protections that ensure its safe and stable operation:

1) Reverse phase

2) Lack phase

3) High/low pressure

4) Gas discharge

5) Outlet water temp. too low (high)

                        6) water stopped

 

7) antifreeze

8)compressor overheat etc.

        High speed microprocessor is used.

 Reserved the terminal for SMS control

 Reserved the terminal for PC monitoring hardware

 With self diagnosis function, and automatically eliminate software problem, the capability of anti-interference is improved by the software uses redundancy and trap technology with WATCHDOG of hardware.

Advanced touch screen is used, the lifetime of which is more than 1million times of consecutive touch.

Digital display of:

1) Entering and leaving water temperature

2)Temperature and differential settings

3)Alarm description

4) Hour meters readout of operation and number of unit and compressor start-ups

 

Application range:

Water source temperature range: 10~35.

7 chilled water or 50 hot water both available, and also domestic living water.

Be used for the heat source for city district heating 

 

Nomenclature 

 

   Optional accessories

 

1.        PLC controller

2.        Stepless variable capacity adjust

3.        Soft starter

4.        Heat reclaim

5.        Wooden box package

6.        Rectangular base frame

7.        Noise insulation box

8.        Anti-corrosion type

9.        Waterside 2.0 Mpa pressure bearing capacity

10.    R407C, R410A, R134A refrigerant

11.    Other optional accessories

A: rubber isolator  B: Spring isolator C: Remote control box.

Specification  

Model

VWSN008-P

VWSN012-P

VWSN015-P

Cooling tower type

Underground water type

Buried pipeline type

Cooling tower type

Underground water type

Buried pipeline type

Cooling tower type

Underground water type

Buried pipeline type

Nominal cooling capacity

kW

8

8

8

11

12

12

14.5

15

15

Nominal heating capacity

kW

13

10

7

16

13

9.5

20

17

12

Power input

Cooling

kW

2.3

2.1

2.1

2.8

2.6

2.6

3.5

3.2

3.2

Heating

kW

2.8

2.7

2.6

3.5

3.4

6.4

4.3

4.2

4.1

Refrigerant Type

R22

R22

R22

R22

R22

R22

R22

R22

R22

Power supply

V/Ph/Hz

220/1/50

220/1/50

220/1/50

380/3/50

380/3/50

380/3/50

380/3/50

380/3/50

380/3/50

Compressor type

Full-hermetic scroll type

Full-hermetic scroll type

Full-hermetic scroll type

Evaporator

Type

--

Panel heat exchanger

Panel heat exchanger

Panel heat exchanger

Water side resistance

kPa

20~50

20~50

20~50

20~50

20~50

20~50

20~50

20~50

20~50

Condenser

Type

--

Panel heat exchanger

Panel heat exchanger

Panel heat exchanger

Water side resistance

kPa

30~50

30~50

30~50

30~50

30~50

30~50

30~50

30~50

30~50

User side

Water inlet / outlet temp.

Cooling: 12/7, Heating: 40/45

Cooling: 12/7, Heating: 40/45

Cooling: 12/7, Heating: 40/45

Water flow

m3/h

2

2

1

3

2

2

3

3

3

Standard pressure-bearing

1 MPa

1 MPa

1 MPa

Fouling factor

m2/kW

0.086

0.086

0.086

0.086

0.086

0.086

0.086

0.086

0.086

Pipe connection

In

1"

1"

1"

1"

1"

1"

1 1/4"

1 1/4"

1 1/4"

Power of built-in W.P.

kw

0.55

0.55

0.55

0.75

0.75

0.75

0.75

0.75

0.75

Heat source side

Water inlet / outlet temp.

Cooling 30/35 Heating 20/15

Cooling 30/35 Heating 20/15

Cooling 30/35 Heating 20/15

Water flow

m3/h

2

1

2

2

1

3

3

1

3

Standard pressure-bearing

1 MPa

1 MPa

1 MPa

Fouling factor

m2/kW

0.086

0.086

0.086

0.086

0.086

0.086

0.086

0.086

0.086

Pipe connection

in

1"

1"

1"

1"

1"

1"

1 1/4"

1 1/4"

1 1/4"

Safety protection

--

Phase protection, high/low pressure protection, exhaust air temp. protection, Over high/low outlet water temp. protection, anti-freezing protection

Dimension

Length

mm

900

900

900

900

900

900

900

900

900

Width

mm

740

740

740

740

740

740

740

740

740

Height

mm

970

970

970

970

970

970

970

970

970

Net weight

kg

150

220

150

180

180

180

200

200

200

Noise

dB(A)

≤54

≤54

≤54

56

56

56

58

58

58

 

Model

VWSN020-P

VWSN030-P

VWSN040-P

Cooling tower type

Underground water type

Buried pipeline type

Cooling tower type

Underground water type

Buried pipeline type

Cooling tower type

Underground water type

Buried pipeline type

Nominal cooling capacity

kW

19

20

20

29

30

30

38

40

40

Nominal heating capacity

kW

25

22

16

40

34

24

50

44

32

Power input

Cooling

kW

3.7

3.4

3.4

7

6.4

6.4

7.4

6.8

6.8

Heating

kW

4.7

4.7

4.7

8.6

8.4

8.2

9.4

9.4

9.4

Refrigerant Type

R22

R22

R22

R22

R22

R22

R22

R22

R22

Power supply

V/Ph/Hz

380/3/50

380/3/50

380/3/50

380/3/50

380/3/50

380/3/50

380/3/50

380/3/50

380/3/50

Compressor type

Full-hermetic scroll type

Full-hermetic scroll type

Full-hermetic scroll type

Evaporator

Type

--

Panel heat exchanger

Panel heat exchanger

Panel heat exchanger

Water side resistance

kPa

20~50

20~50

20~50

20~50

20~50

20~50

20~50

20~50

20~50

Condenser

Type

--

Panel heat exchanger

Panel heat exchanger

Panel heat exchanger

Water side resistance

kPa

30~50

30~50

30~50

30~50

30~50

30~50

30~50

30~50

30~50

User side

Water inlet / outlet temp.

Cooling: 12/7, Heating: 40/45

Cooling: 12/7, Heating: 40/45

Cooling: 12/7, Heating: 40/45

Water flow

m3/h

4

4

4

7

6

5

7

7

7

Standard pressure-bearing

1 MPa

1 MPa

1 MPa

Fouling factor

m2/kW

0.086

0.086

0.086

0.086

0.086

0.086

0.086

0.086

0.086

Pipe connection

In

1 1/4"

1 1/4"

1 1/4"

1 1/2"

1 1/2"

1 1/2"

1 1/2"

1 1/2"

1 1/2"

Power of built-in W.P.

kw

0.75

0.75

0.75

1.1

1.1

1.1

1.1

1.1

1.1

Heat source side

Water inlet / outlet temp.

Cooling 30/35 Heating 20/15

Cooling 30/35 Heating 20/15

Cooling 30/35 Heating 20/15

Water flow

m3/h

4

2

4

6

3

6

8

4

8

Standard pressure-bearing

1 MPa

1 MPa

1 MPa

Fouling factor

m2/kW

0.086

0.086

0.086

0.086

0.086

0.086

0.086

0.086

0.086

Pipe connection

in

1 1/4"

1 1/4"

1 1/4"

1 1/2"

1 1/2"

1 1/2"

1 1/2"

1 1/2"

1 1/2"

Safety protection

--

Phase protection, high/low pressure protection, exhaust air temp. protection, Over high/low outlet water temp. protection, anti-freezing protection

Dimension

Length

mm

900

900

900

1200

1200

1200

1200

1200

1200

Width

mm

740

740

740

740

740

740

740

740

740

Height

mm

970

970

970

970

970

970

970

970

970

Net weight

kg

220

220

220

320

320

320

410

410

410

Noise

dB(A)

60

60

60

60

60

60

60

60

60

Model

VWSN020

VWSN030

VWSN040

Cooling tower type

Underground water type

Buried pipeline type

Cooling tower type

Underground water type

Buried pipeline type

Cooling tower type

Underground water type

Buried pipeline type

Nominal cooling capacity

kW

20

20

20

29

30

30

38

40

40

Nominal heating capacity

kW

24

24

20

42

36

25

55

48

32

Power input

Cooling

kW

4.9

4.3

4.4

6.6

6

6.1

7.6

7

6.8

Heating

kW

5.8

5.8

5.8

8.2

8

7.6

9.4

9.2

8.8

Refrigerant Type

R22

R22

R22

R22

R22

R22

R22

R22

R22

Power supply

V/Ph/Hz

380/3/50

380/3/50

380/3/50

380/3/50

380/3/50

380/3/50

380/3/50

380/3/50

380/3/50

Compressor type

Full-hermetic scroll type

Evaporator

Type

--

High-efficient tube-in-tube heat exchanger

Water side resistance

kPa

20~50

20~50

20~50

20~50

20~50

20~50

20~50

20~50

20~50

Condenser

Type

--

High-efficient tube-in-tube heat exchanger

Water side resistance

kPa

30~50

30~50

30~50

30~50

30~50

30~50

30~50

30~50

30~50

User side

Water inlet / outlet temp.

Cooling: 12/7, Heating: 40/45

Water flow

m3/h

4

4

3

7

6

5

9

8

7

Standard pressure-bearing

1 MPa

Fouling factor

m2/kW

0.086

0.086

0.086

0.086

0.086

0.086

0.086

0.086

0.086

Pipe connection

In

1 1/2"

1 1/2"

1 1/2"

DN50

DN50

DN50

DN50

DN50

DN50

Heat source side

Water inlet / outlet temp.

Cooling 30/35 Heating 20/15

Cooling 18/29 Heating 15/7

Cooling 25/30 Heating 0/-5

Cooling 30/35 Heating 20/15

Cooling 18/29 Heating 15/7

Cooling 25/30 Heating 0/-5

Cooling 30/35 Heating 20/15

Cooling 18/29 Heating 15/7

Cooling 25/30 Heating 0/-5

Water flow

m3/h

4

2

4

6

3

6

8

4

8

Standard pressure-bearing

1 MPa

Fouling factor

m2/kW

0.086

0.086

0.086

0.086

0.086

0.086

0.086

0.086

0.086

Pipe connection

in

1 1/2"

1 1/2"

1 1/2"

DN50

DN50

DN50

DN50

DN50

DN50

Safety protection

--

Phase protection, high/low pressure protection, exhaust air temp. protection, Over high/low outlet water temp. protection, anti-freezing protection

Dimension

Length

mm

1425

1425

1425

1425

1425

1425

1425

1425

1425

Width

mm

560

560

560

560

560

560

560

560

560

Height

mm

978

978

978

978

978

978

1078

1078

1078

Net weight

kg

220

220

220

320

320

320

400

400

400

Noise

dB(A)

≤55

≤55

≤55

≤60

≤60

≤60

≤60

≤60

≤60

 

 

Note: CoolingCooled water entering/leaving temperature 12/7Cooling water entering/leaving temperature 18/29

         HeatingCooled water entering 15heating water entering 40

         Heat recovery  is optional device, entering water 40, leaving water 45.

Water side max.bearing pressure:1.0Mpa

         The data above is subject to change without prior notice. 

Specification 

NOTE:  CoolingCooled water entering/leaving temperature 12/7Cooling water entering/leaving temperature 18/29

       HeatingCooled water entering/leaving temperature 15/7heating water entering/leaving temperature 40/45

       Heat reclaim is optional device, entering water 40, leaving water 45.

Water side max.bearing pressure:1.0Mpa

The data above is subject to change without prior notice. 

Specification

 

Note:  CoolingCooled water entering/leaving temperature 12/7Cooling water entering/leaving temperature 18/29

       HeatingCooled water entering/leaving temperature 15/7heating water entering/leaving temperature 40/45

       Heat reclaim is optional device, entering water 40, leaving water 45.

       The data above is subject to change without prior notice.

 

 Specification 

Note:  CoolingCooled water entering/leaving temperature 12/7Cooling water entering/leaving temperature 18/29

       HeatingCooled water entering/leaving temperature 15/7heating water entering/leaving temperature 40/45

       Heat reclaim is optional device, entering water 40, leaving water 45.

       The data above is subject to change without prior notice.

Capacities/power input in different conditions

 

Cooling capacity correction coefficient:

Leaving Chilled water Temp.  

Entering cooling water temp.℃ condenser

13

14

15

16

17

18

19

20

21

22

23

24

25

5℃

1.01

1.00

0.99

0.97

0.96

0.95

0.94

0.92

0.91

0.90

0.89

0.88

0.87

7℃

1.07

1.05

1.04

1.03

1.01

1.00

0.99

0.97

0.96

0.95

0.94

0.92

0.91

9℃

1.12

1.11

1.09

1.08

1.07

1.05

1.04

1.03

1.01

1.00

0.99

0.97

0.96

11℃

1.18

1.17

1.15

1.14

1.12

1.11

1.09

1.08

1.07

1.05

1.04

1.03

1.01

13℃

1.25

1.23

1.21

1.20

1.18

1.17

1.15

1.14

1.12

1.11

1.09

1.08

1.07

15℃

1.31

1.29

1.28

1.26

1.25

1.23

1.21

1.20

1.18

1.17

1.15

1.14

1.12

 

Cooling power input correction coefficient:

 

Heating capacity correction coefficient:

Leaving hot water Temp.   

Entering Chilled water Temp.℃ (Evaporator)

10

11

12

13

14

15

16

17

18

19

20

39℃

0.946

0.972

0.997

1.024

1.051

1.080

1.108

1.136

1.166

1.196

1.227

42℃

0.911

0.935

0.960

0.986

1.012

1.039

1.066

1.094

1.122

1.151

1.181

45℃

0.877

0.900

0.924

0.949

0.974

1.000

1.026

1.053

1.080

1.108

1.137

48℃

0.842

0.865

0.888

0.912

0.936

0.961

0.986

1.012

1.038

1.065

1.093

 

Heating power input correction coefficient:

Leaving hot water Temp.  

Entering Chilled water Temp.℃(Evaporator)

10

11

12

13

14

15

16

17

18

19

20

39℃

1.119

1.128

1.136

1.145

1.153

1.162

1.171

1.180

1.188

1.197

1.206

42℃

1.038

1.046

1.054

1.062

1.070

1.078

1.086

1.094

1.102

1.111

1.119

45℃

0.963

0.970

0.978

0.985

0.993

1.000

1.008

1.015

1.023

1.030

1.038

48℃

0.888

0.895

0.901

0.908

0.915

0.922

0.929

0.936

0.943

0.950

0.957

 Dimension

 

 1) VWSN430~780 

 

 

 

 

    Machine Dimension

 

 

 

 

 

  Foundation Dimension

  

 

Model

VWSN350

VWSN430

VWSN480

VWSN540

VWSN700

VWSN780

A

1460

1420

1420

1900

1730

1730

B

900

900

900

920

1100

1100

C

1600

1745

1745

1810

1995

1995

D

2505

2745

2745

3135

3070

3070

E

1175

1290

1290

1340

1415

1415

F

222

214

214

224

225

225

G

1740

1860

1860

2240

2140

2140

H

286

275

275

327

312

312

I

612

677

677

830

880

880

J

369

363

363

437

460

460

K

350

352

352

350

402

402

L

485

475

475

525

554

554

 

 

 

 

 

 

 

 

 

 

 Note: Cooling water inlet pipe is lower than outlet pipe, chilled water inlet at right and out at left (in front of control box) 

 

2. VWSN860~1720 

  

3. VWSN1920~3500  

 

Model

VWSN1920

VWSN2040

VWSN2160

VWSN2400

VWSN2640

VWSN2840

VWSN3200

VWSN3500

A

2000

2000

2000

2000

2000

2000

2000

2260

B

2050

2050

2110

2110

2160

2260

2210

2360

C

2210

2315

2355

2365

2495

2465

2555

2575

D

4320

4600

4500

4650

4650

5000

4750

4850

E

2290

2290

2350

2350

2400

2460

2400

2400

F

1160

1300

1250

1325

1325

1500

1375

1295

G

465

380

479

404

304

260

355

436

H

3390

3840

3540

3840

4040

4480

4040

3980

I

765

920

1015

1065

1090

970

1090

1060

J

1222

1340

1370

1390

1026

1350

1475

1465

K

350

348

372

373

350

344

350

350

L

305

355

350

350

390

350

390

390

M

647

647

642

642

672

677

662

787

N

900

900

950

950

950

980

1000

1050

O

1218

1208

1223

1223

1253

1307

1273

1337

P

900

900

950

950

950

980

1000

1050

Q

120

120

120

120

120

120

120

120

Note: Cooling water inlet pipe is lower than outlet pipe, chilled water inlet at right and out at left (in front of control box)

 Wiring at site

 

 

  

Installations & Maintenance


 

 1. Project methods & attention:

        

 2.  Requirements of underground water

For getting enough heating capacity in winter, when underground water temp. varies, water amount must be changed, i.e. the lower the underground water temp., the more the water flow is needed. When underground water is used as condensing water in system, the higher the underground water temp. is, the more underground water flow is needed.

The water flow correction coefficient as referred in diagram followed.

The actual required underground water flow amount is the figure that correction coefficient times water flow amount in cooling/heating mentioned in speciation.

When the underground water flow is uncertain, then select the unit model according to the cooling/heating capacity required, and then calculate the underground water flow according to the unit specification and local underground water temp, and then finalize the exploitation method of the underground water.

In addition with underground temperature and flow amount, its corrosion situation on copper, steel report should be prepared, so as to have special treatment on heat exchanger and water system when necessary.

If the temp. of the underground water or of the other cooling/heating source is beyond the range mentioned in the diagram, nonstandard products should be adopted, please contact us.

 

 


 

Water quality standard

Items

Evaporator side water

Condenser side water

PH

  6.5—8.5  

6.0—8.0

Conductivity

≤200uv/cm25℃

≤200uv/cm25℃

chloride ion

≤50ppm

≤200ppm

Sulfate ion

≤50ppm 

≤200ppm

Total content of iron

≤0.3ppm

≤0.5ppm

Alkali ion

≤50ppm  

≤100ppm

Total hardness of water

≤50ppm 

≤100ppm

Sand 

≤30ppm

≤50ppm

 3.  Heat exchange suggestion of mixing water at water source side:

    When water temperature is below 18℃ in summer or above 22 ℃ in winter at water source side, the heat exchanging method of mixing water is suggested as below for ensure the stable and high efficient operation of the machine.

 

  

      

  4.  Typical diagram for system with domestic hot water

 

 

 

 

   

5. Room requirements

 

1)      For a convenient operation and maintenance, there should be at least leave 1-1.5m space in front of the operation side, and enough space allow easy movement of people in other sides.

2)      Good ventilation environment should be ensured in the operation room, the room temp will be increased as the environment temp is lower than the temperature of compressor gas discharge end and gas discharge pipe, and the machine room temperature should not beyond 35℃.

3)      The operation room should be sound insulated according to specific situation so as to avoid the operation noise disturbs environment surrounding. It is better that main machine and pump not installed in same room.

 

6. Handling

Handle the machine carefully during lifting to avoid damage, especially no damage to compressor, control system, piping system etc.. Soft material should be used at the point of touching between the lifting rope and the unit. And to decrease the pressure on the unit, supporter bar between the rope and the unit is necessary for heavy unit. Crane can be applied during the handling, the lifting rope and the unit should be connected firmly, the unit should be horizontal without slope, and no rope touch on heat exchanger side, panel and the top of machine.

 

7. Installation

To guarantee sound quality and perfect performance, each unit has been strictly tested before leaving factory. Great care should be required during handling and installation, no any damage on control system or on pipes is allowed.

 

1)      Before open the package, move the unit to the installation site as close as possible and pay attention on keeping the unit to be vertical.

2)      During the installation, the sling bearing capacity should be 3 times of the unit’s weight, and no people under the suspending unit. Please refer to rating label for unit weight.

3)      Must have horizontal level calibration after the unit is on the foundation and the horizontal deviation should be within 0.02%.

4)      The direction of the water pipe connected with the unit should be in line with the specification and the pipeline diameter should not be too small. Water flow switch should be equipped on the pipeline and connected with the compressor.

5)      Temperature and pressure indicators should be equipped at both inlets and outlets of the chilled water pipe and cooling pipe for the convenient monitoring on the unit’s operation condition.

6)      Power capacity provided should be big enough, power supply voltage fluctuation should be within ±10%, the earthing should be well done.

 

8. Water system and piping

1)      The installation should in line with the national and local authorities’ requirement.

2)      Chilled water pipe must be insulated to avoid capacity loss and having condensed water.

3)      For the sake of water quality, filter on input pipe is necessary.

4)      Dimension of the joint of connection pipe should meet requirementrefer to Technical data

5)      For the sake of automatically discharge air, supply water indirectly and expanding or shrinking of chilled water system, expansion tank is required. And it should 1.5m higher than the highest point of the water system. No valve is allowed in the pipe between the expansion tank and return water system.

6)      The air discharge valve should be fixed the highest point of the chilled water system. After connection of the chilled water system finished, and pressure testing is acceptable, open the air discharge valve to exhaust the air in chilled water and close the valve after completely air exhausted. If the water or the pipe inside is not clean, it needs to clean the filter after half an hour’s pump operation.

7)      Before the first running of the circulation water, close the input/output valve first, then open the bypass valve, run the water pump only to circulate the water in pipe to clean the pipe and clean the filter after that, then add clean water again to the system, then turn on the inlet/outlet valve and close the bypass valve for normal operation.

8)       Water segregator, water collector and water pressure balance valve are required when several units to be parallelized. 

9)      Water drain valve should be fixed at the lowest point of the water system.

10)   The design of water piping, please refer to the Air conditioning Design Manual, and the project operation and inspection refer to GB50243-1997 Ventilation & air conditioning project operation and inspection Norms.

 

9. Power connection

1)      Wire selection and connection should be carried out strictly according to requirement.

2)      Should have earthing well done, no earthing to gas pipe, water pipe, telephone line, to avoid electric shock cause by bad earthing.

3)      Ensure the phase sequence is correct, to avoid not running.

 

10. Maintenance 

1)      The qualified technician is required for the maintenance; all the protection devices and controller must be checked before restart.

2)      Regular and correct maintenance is required for stability and good performance. Chilled and cooling water must be complete drained when long time no use to avoid possible freezing.

11. Notice

1)  Antifreezer should be added in chilled water if water temp. set below zero or near zero.

2)  Clean water system regularly.

3)  Pay attention to antifreeze when ambient temp. is around 0℃ in winter.

4)  Antifreezer or other antifreeze measure must be used in bad ambient(under 0℃ outdoor).

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Coldcare Nigeria Limited is in technical partnership with acclaimed world leaders in related engineering services. This has helped us in the areas of training as well as research and development. This way, we are able to remain relevant and up-to-date in the ever-evolving engineering world

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