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
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
0,41
0,41
0,70
0,70
0,70
0,70
0,70
0,70
0,70
0,63
0,63
1,80
1,80
1,75
1,75
Fan current
[A]
1,80
1,80
1,80
2,90
2,90
2,90
2,90
2,90
2,90
2,90
2,70
2,70
3,30
3,30
3,30
3,30
Number of fans
[#]
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
P3 Pump power input
[kW]
0,65
0,65
0,65
0,90
0,90
0,90
0,90
1,50
1,50
1,50
1,50
1,50
2,20
2,20
3,00
4,00
P3 Pump absorbed current
[A]
1,60
1,60
1,60
2,60
2,60
2,60
2,60
3,40
3,40
3,40
3,40
3,40
4,60
4,60
6,30
8,10
Power supply
[V/Ph/hz]
400/3/50
IP protection degree
IP44
Refrigerant
R410A
Compressor type
Rotary
Rotary
SCROLL
Evaporator type
BRAZED PLATES
Condenser type
MICROCHANNEL
N° of compressors
[#]
1
1
1
1
1
2
2
2
2
3
3
3
4
4
6
6
N° of refrigerant circuits
[#]
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
Air flow
[m3/h]
4.346
4.346
4.531
8.179
8.179
8.049
8.049
15.399
15.399
15.399
18.791
18.791
32.931
32.931
44.185
44.185
Sound pressure level (4)
[dbA]
43,0
43,0
43,0
50,0
50,0
50,0
50,0
53,0
53,0
53,0
49,5
49,5
58,5
58,5
52,0
52,0
Water connections diameter
[inch]
1“
1“
1“
1“
1“
1“
1“
1 ½ “
1 ½ “
1 ½ “
1 ½ “
1 ½ “
2“
2“
2“
2“
Width
[mm]
662
662
662
662
662
662
662
752
752
832
832
832
1110
1110
1210
1210
Depth
[mm]
991
991
991
1.305
1.305
1.305
1.305
1.635
1.635
1.850
1.850
1.850
2.025
2.025
2.230
2.230
Height
[mm]
1.335
1.335
1.335
1.425
1.425
1.425
1.425
1.535
1.535
1.700
1.700
1.700
1.900
1.900
2.255
2.255
Weight
[kg]
210
215
260
265
275
315
325
400
410
500
500
515
720
770
980
1.000
Tank capacity – Option
[dm3]
95,0
95,0
95,0
95,0
95,0
95,0
95,0
135,0
135,0
135,0
135,0
135,0
205,0
205,0
205,0
205,0
Expansion vessel capacity
[dm3]
5,0
5,0
5,0
5,0
5,0
5,0
5,0
8,0
8,0
8,0
8,0
8,0
12,0
12,0
12,0
12,0
P5 Pump power input – Option
[kW]
0,75
0,75
0,75
1,30
1,30
1,30
1,30
2,20
2,20
2,20
2,20
2,20
4,00
4,00
4,00
4,00
P5 Pump absorbed current – Option
[A]
2,50
2,50
2,50
3,50
3,50
3,50
9,20
3,50
4,60
4,60
4,60
4,60
8,10
8,10
8,10
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.