pg46/47-GB
14-07-1999 9:31
Pagina 1
AIR COOLED LIQUID CHILLERS
“FREE-COOLING” VERSION
WRAT/FC
0502 - 2404
MODELS
UNIT DESCRIPTION
This series of air cooled liquid chillers is equipped with FC coils, and is for use
in civil and industrial plants whenever the need for cooling continues throughout the cold months, or when the ambient air temperature is lower than
the return liquid temperature from the plant. During the “free-cooling” operation, the fluid is cooled by means of the external air, thus reducing the load on
the compressors or even completely substituting them. The necessary cooling capacity is therefore obtained with almost zero energy expenditure
(FREE-COOLING 100 % = EER 25).
WRAT/FC
VERSIONS
STANDARD UNIT COMPOSITION
– Base of galvanized hot-painted sheet steel.
– Outer casing made of paraluman and frame of aluminium structural sections.
– From 2 to 4 semi-hermetic reciprocating compressors.
– Silencers on the compressor discharge lines.
– Condensing and FREE-COOLING coil with copper tubes and aluminium fins,
complete with subcooling circuit.
– FREE-COOLING three way valves and related water connections.
– Liquid receiver complete with flooding valves for head pressure control.
– Axial fans with six-pole motors and die-cast aluminium blades, with IP54
protection ratio.
– Thermally insulated evaporator, with asymmetric refrigerant paths.
– Thermostatic expansion valves. Dryer filters. Sight glasses. Solenoid valves
on the liquid line.
– Electrical power and control panel complying with EN 60204-1/IEC 204-1
standards.
– Microprocessor control system.
– Freeze-proof oil charge and refrigerant charge.
– Interlock door mains isolator.
– General testing and operational test carried out in the factory in accordance
with European Standard EN 12055.
This range of units features
cooling only.
B
LN
SL
Standard unit.
Unit with reduced noise.
Super low noise units.
A 320 CV / 06 - 99 GB
pg46/47-GB
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Pagina 2
GENERAL TECHNICAL DATA
MODELS
WRAT/FC
Cooling capacity
➀
Compressor power input
➀
E.E.R.
➀
WRAT/FC FREE-COOLING “ON”
Total Free-cooling capacity
➁
Absorbed power
➁
E.E.R.
➁
Total Free-cooling temperature
➁
OPERATING WEIGHT
WRAT/FC - B
DIMENSIONS
0502
0602
0702
0802
0822
1002
1202
1402
1602
1604
1804
2004
2204
2404
kW 117
kW 35
2.9
132
43
2.8
160
56
2.7
186
68
2.6
211
69
2.8
232
82
2.6
267
98
2.7
293
96
2.8
343
118
2.7
382
138
2.5
418
150
2.5
447
165
2.5
496
182
2.5
552
202
2.8
kW 117
kW 5.6
21
°C
0
132
5.6
23.6
-1
160
5.6
28.6
-1
186
5.6
33.2
- 2.3
211
8.4
25.1
-2
232
8.4
27.6
-1
267
11.2
23.8
- 1.5
293
11.8
24.8
-1
343
14
24.5
- 1.6
382
16.8
22.7
-1
418
21
20
-1
447
21
21.3
- 1.6
496
21
23.6
- 2.5
552
21
26.3
-4
Kg. 1920
1960
2160
2330
2420
2920
3050
3630
3750
5190
5440
5600
5740
6170
A
➂ mm 4110
4110
4110
4110
4110
5110
5110
6110
6110
6240
6240
6240
6240
6240
B
➂ mm 2220
2220
2220
2220
2220
2220
2220
2220
2220
2310
2310
2310
2310
2310
H
mm 1540
1540
1990
1990
1990
1990
1990
1990
1990
2235
2235
2235
2235
2235
H
H
B
A
WRAT/FC 0502 - 1602
A
B
➀ Data referred to:
Chilled water
Condensing air
Glycol
➁ Data referred to:
Chilled water
Glycol
➂ Free areas required:
Condensing coil side minimum
Electrical panel side
Opposite side to electrical panel
12/7 °C
35 °C
30 %
12/7 °C
30 %
2000 mm
1500 mm
1500 mm
WRAT/FC 1604 - 2404
MAIN FUNCTIONS OF THE CVM CONTROLS
Voltage and frequency supply control
Missing external consens led signal
Remote on/off by external volt-free contact
Cumulative fault warning alarm
Evaporator inlet/outlet water temperature display
Free cooling coils and external air temperature display
Compressor/circuit failure signal
Unit general-alarm signal
Print-out of the temperature and pressure values (if any)
Configuration parameters print-out
Historical alarms and events memory and print-out
Propor. regulating algorithm on the inlet water temp.
Proportional+Integral regulating algorithm
Compressors start sequence at unit start-up
Real-time internal clock
Programmable timer function
Double-set mode connected to programmable timer
Delayed compressor start
Compressor start per hour and restarting time control
300
•
•
Opt.
•
•
•
•
•
•
•
200
•
Par.
Par.
–
–
–
•
•
3000
•
•
•
•
•
•
•
•
•
•
200
•
Par.
Par.
•
Par.
Par.
•
•
3000
•
•
•
•
•
•
•
•
Par.
Par.
Opt.
Par.
•
300
•
•
•
•
•
•
•
•
Par.
–
–
–
•
Compressor working-hours control and display
Compressor working hours balance system
Part-winding compressor start
Pump-down when stopped
Pump-down on starting
Fan speed control
Led display of interface board correct operation
Auto-diagnostic of the electrical part
CVM-Interface connection
Supervisoring software connection
Landis Staefa comunication gateway
Johnson Controls comunication gateway
Comunication protocol
WRAT/FC 0502 - 1602 with CVM 300
WRAT/FC 1604 - 2404 with CVM 3000
standard
•:
–:
not available
Opt: available upon request
Par.: available modifying a value of the configuration parameters
Fläkt Woods AS tlf. 63 81 14 00 Lillestrøm Stavanger Bergen Trondheim Tromsø