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CG-PRC002A-EN

31

Mechanical
Especifications

Cooling Components

Trane 20, 25 and 30Tons CGAD Air-
Cooled Liquid Chillers have only one
cooling circuit, and the 40, 50, 60, 70 , 80
and 90 Tons units have two independent
cooling circuits. Each cooling circuit is
supplied  with  the  following  components:

- Thermostatic expansion valve;
- Tank valve at condenser outlet, with a

pressure intake point of 1/4" SAE;

- Liquid  sightglass  with  humidity  indicator;
- Dryer  filter;

Fig. 29 -  Expansion

Valve

Fig. 28 - Liquid Sightglass

Compressor Scroll

Compressors Scroll   provide more benefits
to the air conditioning system user when
compared  to  reciprocating  compressors.

- They have a 5 to 10% higher efficiency, in
average;

- They do have no valves, being extremely
resistant to slugging;

- They have 64% fewer moving parts;

- Extremely smooth and silent operation,
comparable to a centrifugal compressor;

- Low torque variation, which provides
vibration and noise reduction and increa-
ses motor life.

Fig. 30 - Comparison Scroll x Reciprocal

Fig. 31 - Drier Filter

Filtering  Element

Compression Cycle

Figure 28 shows a Scroll compressor in
detail,  presenting  its  main  components
and the operational principle, according to
the  items  below:

A. The refrigerant, in gaseous state , is
suctioned into its interior though the sucti-
on  connection.

B. The refrigerant  passes through a cavida-
ty between the rotor and the stator, cooling
the motor .

C. The refrigerant speed decreases when it
leaves the motor cavity and the oil is sepa-
rated. The oil returns to the crankcase..

D. The refrigerant goes into the suction
chamber and fills out the compression
scroll.

E. After compression, the refrigerant is
dischraged in the compressor hood throu-
gh a hole in the center of the fixed Scroll.
The hood function is to amortize the refri-
gerant flow, reducing vibrations. Then the
refrigerant  leaves the  compressor through
the  discharge  connection.

FIg. 32 - Compressor Scroll

Fixed Scroll

C

Moving
Scroll

A
Suction

E
Discharge

Motor

Check Valve

D

B

Motor
Shaft

Oil Pump

Summary of Contents for CGAD020C

Page 1: ...uidChillers Air Cooled Scroll Compressor 20 to 150 Tons CG PRC002A EN Junho 2006 Models 50 or 60 Hz CGAD020C CGAD040C CGAD070C CGAD100C CGAD025C CGAD050C CGAD080C CGAD120C CGAD030C CGAD060C CGAD090C C...

Page 2: ...rformance Built to last For more than 40 years Trane has been using the best resources available on development engineering production and marketing to produce quality equip ments All this tradition a...

Page 3: ...tors 09 Performance Data 11 Performance Data R 22 11 Performance Data R 407C 12 Electrical Data 13 Controls 16 Dimensional Data 20 CGAD 020C 20 CGAD 025C 030C 21 CGAD 040C 22 CGAD 050C 060C 23 CGAD 07...

Page 4: ...A Ice Making Demand Limit COMM3 B Alarm Ext Setp Ice Making Dem Lim C Alarm Ext Setp COMM3 D Alarm Ice Making Dem Lim COMM3 E Ext Setp Ice Making Dem Lim COMM3 F All modules Digit 13 Coil Type A Coil...

Page 5: ...SHA100 CSHA150 CSHA100 CSHA150 ZR300 ZR250 ZR300 Type Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Quantity 2 1 1 2 4 2 2 4 4 2 4 2 6 4 6 6 Nominal Capacity Tons...

Page 6: ...f 81 1 kW 3 Determine the evaporator pressure drop using the flow and the evaporator water pressure drop curves figure 05 Introducing the curve at 168 GPM the pressure drop for an evaporator with the...

Page 7: ...educe the sound transmitted through electrical conduits use flexible electrical conduits State and local codes on sound emissions should always be considered As the environment in which a sound source...

Page 8: ...anometers must be equipped with siphons Install gate valves to isolate the manome ters when they are not being used Use piping joints to facilitate assembly and disassembly services Inlet and outlet m...

Page 9: ...Evaporator Pressure Drop 20 to 60 Tons Units Fig 03 Evaporator Pressure Drop 70 to 90 Tons Units Unit Conversion From To Multiplier Gallons min GPM L s 0 06308 Feet of water Ft Water Pa 2990 Evaporato...

Page 10: ...ance Adjustment Factors Convers o de Unidades De Para Multiplicador Gal es min GPM L s 0 06308 P s de gua Ft gua Pa 2990 Fig 03a Evaporator Pressure Drop 100 to 120 Tons Units Fig 03b Evaporator Press...

Page 11: ...itude Correction Factors Altitude Capacity Consumption Water Flow 0 1 000 1 000 1 000 500 0 997 1 012 0 997 1000 0 994 1 024 0 994 1500 0 991 1 037 0 991 2000 0 987 1 052 0 987 2500 0 983 1 067 0 983...

Page 12: ...48 8 Flow m h 10 9 13 9 16 1 22 1 27 8 31 9 40 1 45 9 50 2 58 0 69 0 88 0 Capacity Tons 19 2 24 5 28 3 38 9 49 0 56 1 70 6 80 8 88 2 101 9 121 4 154 1 kW 19 4 25 0 29 5 40 3 49 2 59 2 73 4 82 6 91 5 1...

Page 13: ...22 3 25 8 35 6 44 7 51 2 64 4 73 6 80 4 91 9 113 8 139 6 kW 19 8 25 5 30 1 41 2 50 2 60 2 74 6 83 9 92 9 106 0 133 0 155 3 Flow m h 9 9 12 6 14 6 20 1 25 2 28 9 36 4 41 6 45 4 50 0 62 0 76 0 Capacity...

Page 14: ...0 Compressors 71 3 224 20 129 4 112 10 CGAD070 Fans 4 5 27 00 485 0 15 6 280 0 13 50 243 0 Total 75 8 251 20 145 0 125 60 Compressors 80 3 250 40 144 5 125 20 CGAD080 Fans 6 0 36 00 540 0 20 8 312 0 1...

Page 15: ...CGAD025 Fans 1 9 7 90 204 0 Total 22 1 52 40 Compressors 23 8 54 20 CGAD030 Fans 1 9 7 90 256 0 Total 25 7 62 10 Compressors 32 6 76 80 CGAD040 Fans 2 5 10 50 222 2 Total 35 1 87 30 Compressors 39 9 8...

Page 16: ...ns of an auxiliary contact in the water pump contactor and a flow switch Water Pump Control The controller has an output to activate the evaporator water pump contactor an external control is therefor...

Page 17: ...bove the temperature set in the controller If the equipment is working it will be switched off when the outdoor air temperature reaches the set temperature Automatic Adjustment of the Chilled Water Se...

Page 18: ...gnostic information can be read in the tracer system Best of all these powerful features are achieved with only one twisted pair of wires The chillers can interface to a range of external control syst...

Page 19: ...s tubing pumps and towers allow building operational staff to monitor all the conditions efficiently Status screens show the current conditions and control actions which have to be taken in order to i...

Page 20: ...ensional Data CGAD020C Fig 07 Unit Dimensions CGAD 020C NOTES 1 FIXING POINTS FOR VIBRATION INSULATORS 4 X 11 5 mm DIAM HOLES 2 VIBRATION INSULATORS ARE NOT SUPPLIED WITH THE EQUIPMENT Fig 08 Top View...

Page 21: ...a Fig 09 Unit Dimensions CGAD 025C 030C CGAD025C 030C NOTES 1 FIXING POINTS FOR VIBRATION INSULATORS 4 X 11 5 mm DIAM HOLES 2 VIBRATION INSULATORS ARE NOT SUPPLIED WITH THE EQUIPMENT 3 UNITS NOT SPECI...

Page 22: ...1 Unit Dimensions CGAD 040C CGAD 040C NOTES 1 FIXING POINTS FOR VIBRATION INSULATORS 4 X 11 5 mm DIAM HOLES 2 VIBRATION INSULATORS ARE NOT SUPPLIED WITH THE EQUIPMENT 3 UNITS NOT SPECIFIED mm COMPRESS...

Page 23: ...a CGAD 050C 060C Fig 13 Unit Dimensions CGAD 050B 060C Fig 14 Top View of Fans NOTES 1 FIXING POINTS FOR VIBRATION INSULATORS 4 X 11 5 mm DIAM HOLES 2 VIBRATION INSULATORS ARE NOT SUPPLIED WITH THE EQ...

Page 24: ...Fig 15 Unit Dimensions CGAD 070C Fig 16 Top View of Fans NOTES 1 FIXING POINTS FOR VIBRATION INSULATORS 6 X 11 5 mm DIAM HOLES 2 VIBRATION INSULATORS ARE NOT SUPPLIED WITH THE EQUIPMENT 3 UNITS NOT S...

Page 25: ...ES 1 FIXING POINTS FOR VIBRATION INSULATORS 6 X 11 5 mm DIAM HOLES 2 VIBRATION INSULATORS ARE NOT SUPPLIED WITH THE EQUIPMENT 3 UNITS NOT SPECIFIED mm Fig 17 Unit Dimensions CGAD 080C 090C Fig 18 Top...

Page 26: ...l Data CGAD 100C NOTES 1 FIXING POINTS FOR VIBRATION INSULATORS 6 X 11 5 mm DIAM HOLES 2 VIBRATION INSULATORS ARE NOT SUPPLIED WITH THE EQUIPMENT 3 UNITS NOT SPECIFIED mm Fig 19 Unit Dimensions CGAD 1...

Page 27: ...l Data CGAD 120C NOTES 1 FIXING POINTS FOR VIBRATION INSULATORS 6 X 11 5 mm DIAM HOLES 2 VIBRATION INSULATORS ARE NOT SUPPLIED WITH THE EQUIPMENT 3 UNITS NOT SPECIFIED mm Fig 21 Unit Dimensions CGAD 1...

Page 28: ...Dimensional Data NOTES 1 FIXING POINTS FOR VIBRATION INSULATORS 6 X 11 5 mm DIAM HOLES 2 VIBRATION INSULATORS ARE NOT SUPPLIED WITH THE EQUIPMENT 3 UNITS NOT SPECIFIED mm Fig 23 Unit Dimensions CGAD 1...

Page 29: ...PRC002A EN 29 Maintenance and Air Circulation Clearances Fig 25 Maintenance and Air Circulation Clearances CGAD 020 to 150 Fig 26 Maintenance and Air Circulation Clearances CGAD 020 to 150 NOTE Units...

Page 30: ...affle Plates Internally Rifled Copper Tube Water Flow Air Flow Evaporator Coils Fan Fig 22 Condenser Air Flow The copper tubes are internally rifled seamless tubes mounted and mechanically expanded in...

Page 31: ...s vibration and noise reduction and increa ses motor life Fig 30 Comparison Scroll x Reciprocal Fig 31 Drier Filter Filtering Element Compression Cycle Figure 28 shows a Scroll compressor in detail pr...

Page 32: ...ratio nal Weight Shipping Weight mm mm mm m2 kg kg CGAD020C 1840 5 2195 0 1350 0 2 700 1340 1300 CGAD025C 1840 5 2195 0 1700 0 3 400 1420 1380 CGAD030C 1840 5 2195 0 1700 0 3 400 1480 1420 CGAD040C 21...

Page 33: ...An American Standard Company Literature Order Number File Number Supersedes Stocking Location Since Trane has a policy of continuous product and product data improvement it reserves the right to chan...

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