CWT Series – Menu

CWT series AIR-COOLED WATER CHILLERS WITH ROTARY AND SCROLL COMPRESSORS

Cooling capacity from 7 to 128 kW and water connection diameter from 1″ to 2″

DESCRIPTION
The CWT water chiller range is intended for the air conditioning and industrial processes cooling sector.
The range is designed for outdoor installation and specifically designed to meet the industry application
requirements, to provide accurate control of the chilled water temperature with continuous operation and absolute reliability. The range is air cooled with axial fans. It is composed of 16 basic models,
covering cooling capacities from 7 to 128 kW.

All units are equipped with:
• hermetic rotary or scroll compressors;
• R410A ecological refrigerant gas;
• plate evaporator;
• aluminium micro channel finned coils;
• fans with continuous speed control;
• microprocessor controller;
• ventilated electrical panel;
• integrated storage tank;
• hydraulic pump;
• stainless steel condensers filters;
• filter and shut-off valves for water;

REFRIGERANT CIRCUIT
This is manufactured from top quality materials by skilled personnel according to strict procedures of brazing, compliant with Directive 97/23. It is composed of:
• rotary (CWT007 and CWT010 models) and scroll compressors designed for use with R410A;
• evaporator assembled from AISI 316 stainless steel brazed plate,
• condenser assembled from micro channel aluminium ;
• filter dryer;
• flow sight glass with moisture indicator
• external equalisation thermostatic expansion valve. The thermostatic expansion valve regulates the injection of liquid
refrigerant into the evaporator. The injection is a response to the refrigerant overheating. The range of thermostatic
valves that we use are designed for specific applications and are connected to the circuit via bi-metal brazing;
• unidirectional valves (only for multi-compressor units);
• high pressure switch with manual reset and low pressure switch with automatic reset;
• high and low pressure manometers;
• pressure connections for checks and maintenance.

HYDRAULIC CIRCUIT
This consists of an evaporator and interior piping to the machine, it also includes:
• an storage tank made of carbon steel and thermally insulated;
• an electric stainless steel, thermally insulated pump;
• a water bypass to prevent incidents
• caused by the erroneous closure of the stop valves;
• expansion vessel;
• safety valve;
• automatic vent valve;
• water-level sensor
• water differential pressure switch;
• stop ball valves;
• inlet unit water filter;
• manometer;
• drain valve.

APPLICATIONS
• Air conditioning and industrial processes cooling sector.

Model CWT	007	010	015	018	020	025	030	038	040	045	055	065	075	090	110	130
Cooling capacity (1)	[kW]	7,00	10,31	14,54	18,90	21,31	23,30	28,11	37,80	42,70	45,10	56,70	64,00	75,61	89,79	113,41	128,11
Compressors power input (1)	[kW]	1,45	2,26	3,54	4,11	4,59	5,22	6,92	7,92	9,16	10,00	12,79	14,49	15,47	17,71	21,19	27,81
Total power input (1) (2)	[kW]	2,51	3,32	4,60	5,71	6,29	6,82	8,52	10,82	12,06	12,90	15,55	17,25	21,27	23,51	30,69	35,31
Total absorbed current (1) (2)	[A]	5,08	6,48	8,70	11,30	12,75	13,06	16,07	20,30	23,29	23,96	28,19	32,55	37,26	42,72	54,22	64,88
EER (pump excluded) (1)	3,76	3,86	3,68	3,93	3,96	3,94	3,69	4,06	4,04	3,96	4,03	4,06	3,96	4,21	4,10	4,09
Water flow (1)

[l/h]

1204

1773

2501

3251

3665

4008

4834

6502

7345

7758

9753

11009

13004

15444

19506

22035

Available pressure (1)

[kPa]

252

246

315

323

324

311

302

327

331

335

278

259

227

263

307

Maximum power input (total) (2) (3)

[kW]

3,3

4,4

5,9

7,7

8,5

9,4

11,4

15,1

16,8

17,5

21,1

23,6

30,3

33,5

43,2

49,1

Maximum absorbed current (total) (2) (3))

[A]

6,7

8,1

10,9

14,7

16,3

17,3

20,8

27,7

30,8

31,5

37,9

42,6

52,5

58,7

75,8

86,9

Starting current (2) (3)

[A]

35,6

47,6

55,6

74,3

94,3

49,8

65,5

87,2

10,8

76,3

97,5

120,6

112,0

136,7

135,3

164,9

Fan power

[kW]

0,41

0,70

0,63

1,80

1,75

Fan current

[A]

1,80

2,90

2,70

3,30

Number of fans

[#]

P3 Pump power input

[kW]

0,65

0,90

1,50

2,20

3,00

4,00

P3 Pump absorbed current

[A]

1,60

2,60

3,40

4,60

6,30

8,10

Power supply

[V/Ph/hz]

400/3/50

IP protection degree

IP44

Refrigerant

R410A

Compressor type

Rotary

SCROLL

Evaporator type

BRAZED PLATES

Condenser type

MICROCHANNEL

N° of compressors

[#]

N° of refrigerant circuits

[#]

Air flow

[m3/h]

4.346

4.531

8.179

8.049

15.399

18.791

32.931

44.185

Sound pressure level (4)

[dbA]

43,0

50,0

53,0

49,5

58,5

52,0

Water connections diameter

[inch]

1“

1 ½ “

2“

Width

[mm]

662

752

832

1110

1210

Depth

[mm]

991

1.305

1.635

1.850

2.025

2.230

Height

[mm]

1.335

1.425

1.535

1.700

1.900

2.255

Weight

[kg]

210

215

260

265

275

315

325

400

410

500

515

720

770

980

1.000

Tank capacity – Option

[dm3]

95,0

135,0

205,0

Expansion vessel capacity

[dm3]

5,0

8,0

12,0

P5 Pump power input – Option

[kW]

0,75

1,30

2,20

4,00

P5 Pump absorbed current – Option

[A]

2,50

3,50

9,20

3,50

4,60

8,10

Available pressure (1) (5)

[kPa]

452

445

415

521

518

502

483

530

527

532

452

421

432

424

426

372

(1) Data referred to following conditions: water temperature in/out: 20/15°C – ambient air temperature: 25°C – (2) Data referred to unit with standard P3 pump – (3) Data related to most heavy condition allowed by safety devices fitted on the unit – (4) Referred at 10 m and at an height of 1,5 m in free field – (5) Data referred to unit with P5 pump (optional) – (6) For models from CWT007 to CWT065 with additional loading tank, length increases by 300mm.