Trane CGAD020C, CGAD040C, CGAD070C, CGAD100C, CGAD025C User Manual
...
CGAD
Liquid Chillers
Air-Cooled
Scroll Compressor
20 to 150 Tons
Models: 50 or 60 Hz
CGAD020C CGAD040C CGAD070C CGAD100C
CGAD025C CGAD050C
CGAD030C CGAD060C
Junho 2006
CGAD080C CGAD120C
CGAD090C CGAD150C
CG-PRC002A-EN
Introduction
CGAD
Air-Cooled
Liquid Chillers
Designed for great performance.
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 equipments.
All this tradition and know-how were
gathered to develop the new generation of
CGAD liquid chillers 20 to 150 Tons,
equipped with scroll compressors.
© 2004. American Standard Inc. All rights reserved.
CG-PRC002A-EN
Contents
Introduction
Model Description
General Data CGAD 20-150TR
Selection Procedures
Application Considerations
Performance Adjustment Factors
Performance Data
Performance Data R-22
Performance Data R-407C
Electrical Data
Controls
Dimensional Data
CGAD 020C
CGAD 025C / 030C
CGAD 040C
CGAD 050C / 060C
02
04
05
06
07
09
11
11
12
13
16
20
20
21
22
23
CGAD 070C 24
CGAD 080 / 090C 25
CGAD 100C 26
CGAD 120C 27
CGAD 150C 28
CGAD 150C
Maintenance and Air Circulation Clearances
29
30
CG-PRC002A-EN
Mechanical Specifications
General Dimensions
31
32
3
Model
Description
C G A
D
1, 2, 3 4 5, 6, 7 8 9 10 11 12 13 14 15,16
0 7 0
C 3 2 0 0 A T
0 0
Dígits 1,2,3 - Model
CGA - Cold Generation Air
Dígit 4 - Model Series
D = Série D
Dígits 5,6,7 - Nominal Capacity (Tons)
020
= 20 Tons
025
= 25 Tons
030
= 30 Tons
040
= 40 Tons
050
= 50 Tons
060
= 60 Tons
070 = 70 Tons
080 = 80 Tons
090 = 90 Tons
100 = 100 Tons
120 = 120 Tons
150 = 150 Tons
Dígit 8 - Service Digit
C = Versão “C”
Dígito 9 - Power Suply and Comand
Voltage
3 = 220V/60Hz/3ph - no accessories
K = 380V/60Hz/3ph - no accessories
4 = 440V/60Hz/3ph - no accessories
H = 380V/50Hz/3ph - no accessories
R = 220V/60Hz/3ph - with circuit breaker
S = 380V/60Hz/3ph - with circuit breaker
T = 440V/60Hz/3ph - with circuit breaker
U = 380V/50Hz/3ph - with circuit breaker
V = 220V/60Hz/3ph - with disconnect
switch
X = 380V/60Hz/3ph - with disconnect
switch
Y = 440V/60Hz/3ph - with disconnect
switch
Z = 380V/50Hz/3ph - with disconnect switch
Digit 10 - Refrigerant Type
2 = Refrigerant R-22
4 = Refrigerant R-407C
Digit 11 - Piping Configuration
0
= Standard Piping
A = Piping with Service Valves
in Suction and Discharge Lines.
B
= Piping with Solenoid Valve
C = Piping with Solenoid Valve and
Service Valves in Suction and
Discharge Lines.
Digit 12 - CH-530 Control Modules
0=Standard Control Module
1 = With Alarm Relay
2 = With Remoto Setpoint Adjustment
3 = With Ice Making / Demand Limit
4 = With Communication COMM3
5 = With Alarm + External Setp.
6 = With Alarm + Ice Making / Demand Limit
7 = With Alarm + Communication COMM3
8 = External Setp. + Ice Making / Demand Limit
9 = External Setp. + Communication COMM3
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 with Aluminum Fins
S = Coil with Special protection
(Yellow Fin)
Digit 14 - Expansion Valve
T = Thermostatic Expansion Valve
E = Electronic Expansion Valve (only R-22)
Digits 15 and 16 - Accessories
4
Contact the Marketing Department.
The product code describes optional configuration, capacity and features. It is very important to
indicate the correct order of the equipment code in order to avoid future problems in the shipment.
Each digit of the product code is described above.
CG-PRC002A-EN
General
Nominal Capacity
Nominal System
Nominal Current
Nominal Capacity
Nominal System
Nominal Current
CSHA100
CSHA100
CSHA100
CSHA100
Nominal Capacity
Storage Volume
Min. water flow
Max. water flow
Total face area
Operating weight
Shipping weight
Refrigerant type
Capacity stages
Data
Tab. 01 - General Data - CGAD 20-90 TR - 50 or 60 Hz
Model
60 Hz
(2)
(2)
kW/Tons
kW/Tons
Standard
Optional
Efficiency
50 Hz
Efficiency
Compressor
Model
Type
Quantity 2
Evaporator
Inlet connection
Outlet connection
Condenser
Type
No. of coils 2 2 2 4 4 4 4 4 4 4 4 4
Fins per inches
No. of rows
Fans
Quantity 2 3 3 4 6 6 6 8 8 6 8
Diameter
Air flow
RPM RPM
Motor power
Transmission type Direct Direct Direct Direct Direct Direct Direct Direct Direct Direct Direct Direct
General Data
No. of circuits 1 1 1 2 2 2 2 2 2 2 2 2
CGAD020 CGAD025 CGAD030 CGAD040 CGAD050 CGAD060 CGAD070 CGAD080 CGAD090 CGAD100 CGAD120 CGAD150
Tons
kW
A 72,6 89,3 105,7 148,8 177,0 211,8 251,2 286,4 319,2 277,1 377,4 422,1
Tons
kW
A 42,7 52,4 62,1 87,3 103,9 124,3 147,5 168,1 187,3 131,2 160,8 192,6
Tons
Liters
m3/h
m3/h
m2
mm
m3/h
kW
%
kg
kg
18,5 23,5 27,1 37,3 46,9 53,8 67,3 77,0 84,1 95,9 117,7 145,2
20,4 26,7 31,0 42,3 52,6 62,2 75,8 86,3 94,8 109,4 139,0 165,2
1,103 1,136 1,144 1,134 1,122 1,156 1,126 1,121 1,127 1,141 1,181 1,138
15,2 19,3 22,7 30,6 38,5 45,1 55,2 64,5 70,5 86,1 105,8 129,8
16,9 22,1 25,7 35,1 43,6 51,6 62,9 71,6 78,7 95,7 121,4 141,0
1,114 1,147 1,132 1,148 1,134 1,145 1,140 1,110 1,117 1,112 1,148 1,086
CSHA100
Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll Scroll
32.620 45.870 44.170 64.560 95.140 95.140 97.690 122.330 122.330 98.118 130.824 163.530
R-407C R-407C R-407C R-407C R-407C R-407C R-407C R-407C R-407C R-407C R-407C R-407C
50/100 50/100 50/100 25 / 50 20/50 25 / 50 31/50 31/50 33/50 25/50 17/50 17/50
CSHA150
10 15/10 15 10 15/10 15 14 / 10 15 / 10 15 25 20 25
44 41 62 52 79 143 151 143 122 122 173 277
5,5 6,8 8,2 10,9 13,6 16,3 19,0 21.8 24.5 27,3 34,1 42,2
16,4 20,5 24,5 32,7 40,9 49,0 57.2 65.5 73.4 81,8 102,2 139,0
2" 2"
2" 2"
4,7 4,7 4,7 8,5 11,0 11,0 14,0 14,7 14,7 13,1 16,9 19,5
16 16 14 16 16 16 14 14 14 16 16 16
2 2 3 2 2 2 3 3 3 3 3 3
762 762 762 762 762 762 762 762 762 762 762 762
880 880 880 880 880 880 880 880 880 1140 1140 1140
0,75 0,75 0,75 0,75 0,75 0,75 0,75 0,75 0,75 1,12 1,12 1,12
R-22 R-22 R-22 R-22 R-22 R-22 R-22 R-22 R-22 R-22 R-22 R-22
1340 1420 1480 1910 2210 2500 3000 3240 3220 3775 4135 4653
1300 1380 1420 1860 2130 2360 2850 3100 3100 3653 3962 4376
CSHA150 CSHA100
1 / 1
2 4
2 1/2" 2 1/2"
2 1/2" 2 1/2"
Aluminum fins, 3/8"- OD copper tubes
75 / 100 70/100 75 / 100 63/100 63/100 83/100 75/100 67/100 67/100
CSHA150
2 / 2
CSHA150
3" 4" 4" 4" 4" 4" 6" 6"
3" 4" 4" 4" 4" 4" 6" 6"
CSHA140
4
CSHA150
4 / 2 4 / 2
CSHA150
ZR300 ZR250 ZR300
6 4 6 6
10
Note s :
(1 ) D a t a b as e d o n o p er a tio n co nd itio n s a c o rd ing to s t a n d a rt ARI 59 0 - 9 2
(2 ) T h e s e cu r re n t v a lues ref e r to
(3 ) T h e s e va lues to th e glo b a l e q u ip m en t c o n s u m p ti o n ( c o m p ress o r s a n d fa n s)
(4 ) T h e s e cu r re n t v a lues ref e r to 3 8 0 V / 50 H z power su p p l y
(5 ) T h e measu r e m e n ts shown take in t o a c c o u n t th e depth of t he e letric a l fra m e coup l e d to the e q u ipment (s e e p a g e 27 o f thi s m an u a l)
(6 ) T h e floor are a measu r e m e n ts d o n o t take in to a c c o nt the b a s e o f the e lectric a l fr a m e co u p led to the e q u ip m en t .
220 V / 6 0 H z
pow e r su p p ly
CG-PRC002A-EN
5
Selection
Procedures
Liquid chiller capacity tables 03 and 04, on
pages 11 and 12 show the most frequent
leaving water temperatures. The table
reflects a temperature drop of 5,5 ºC (10ºF)
through the evaporator. For low temperature selections, refer to figures 04 and 05
for Adjustment Factors of Ethylene and
Propylene Glycol.
To select a CGAD Air-Cooled Liquid Chiller
Trane, the following information is
required:
1
Thermal project load of project in tons of
cooling.
2
Chilled water temperature project drop.
3
Leaving chilled water project temperature.
4
Project ambient temperature and refrigerant type.
The evaporator flow is determined
through the following formulas:
GPM =
L/s =
NOTE 1:
The flow should be within the limits
specified in table 01, General Data
(page 05).
Tons X 24
Temperature drop (°F)
kW (Capacity) X 0,239
Temperature drop (°C)
Selection example:
Data:
System load required= 70 Tons.
Leaving chilled water temp. = 7ºC
Chilled water temperature drop = 5,5ºC
(10°F)
Project ambient temperature = 35ºC
1
Calculate the required chilled water flow
using the formula below:
GPM =
70 Tons x 24
10ºF
2
Using table 03 (Performance Data - R-22), a
CGAD 080 unit at these conditions will
output 76,2 Tons with a compressor
consumption of 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
nominal value of 80 Tons is 9 ft, or 2,74 m.
4
For selection of low temperature units, or
applications in which the altitude is
significantly above sea level, or the
temperature drop is different from 5,5 ºC,
contact a local Trane engineer for further
information.
= 168 GPM
For example:
Corrected capacity = Capacity (not
adjusted) x Glycol Capacity Adjustment
Factor
Corrected Flow = Flow (not adjusted) x
Glycol Flow Rate Adjustment Factor
5
The final unit selection is: CGAD 080B
Refrigerant Type: R-22
Cooling capacity =76,2 Tons.
Entering temperatures = 12,5 °C
Leaving chilled water temperature = 7ºC
Chilled water flow =168 GPM
Evaporator pressure drop =2,74 m
Compressor consumption = 81,1 kW
NOTE 2:
Minimum leaving chilled water temperature setpoint
The minimum leaving chilled water
temperature setpoint is 4ºC. For applications where a lower setpoint is required, a
glycol solution must be used. Contact the
local Trane engineer for further information.
Note:
The selection above is an example for manual equipment selection. Please note that a more accurate data check is required for a correct selection.
6
CG-PRC002A-EN
Application
Considerations
Unit Sizing
Unit capacities are listed in the Performance Data section. Intentionally oversizing a unit to assure adequate capacity is
not recommended. The excess in the
system and compressor capacity calculation results in an over-sized liquid chiller. In
addition, an oversized unit is usually more
expensive to purchase, install and operate.
If over-sizing is desired, consider using two
units.
Unit Placement
1
Setting the Unit
2
Isolation and Sound Transmissions
The most effective isolation solution is to
locate the unit away from any sound
sensitive area. Structurally transmitted
sound can be reduced by vibration
eliminators. Spring isolators have proved
to be of little efficiency in CGAD Air-Cooled
Liquid Chiller installations and thus are not
recommended. An acoustical engineer
should always be consulted on applications with critical acoustic reduction levels.
For maximum isolation, water lines and
electrical conduits should also be isolated.
Wall sleeves and rubber-isolated piping
hangers can be used to reduce the sound
transmitted through water piping. To
reduce 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 is located affects the sound
pressure, unit placement must be
carefully evaluated.
Two conditions should be avoided in order
to achieve optimum performance: warm air
recirculation and coil starvation.
Warm air recirculation occurs when the
airflow from the condenser fans discharged
back at the condenser coil inlet, due to
installation site restrictions.
B - Provide Vertical Clearance
C - Provide Side Clearance
D - Provide enough clearance between devices
Coil starvation occurs when the free airflow
to the condenser coil is restricted. Both
warm air recirculation and coil starvation
cause reductions in unit efficiency and
capacity, due to the associated high
discharge pressures. See page 24 (Maintenance and air circulation clearances).
4
Unit Location
A
General
Unobstructed airflow for the condenser is
essential to assure efficient operation and
the liquid chiller capacity. When determining unit placement, careful considerations
must be given to assure enough air flow
across the condenser heat-transfer
surface.
CG-PRC002A-EN
E - Installations in locations surrounded by walls
7
Application
Considerations
Evaporator hydraulic piping
components
The figure below shows how to proceed
with the installation of the water piping.
An air purge is placed on the evaporator
and at the water outlet. Provide additional
air purges at high piping points to release
it from the chilled water system.
Evaporator Drain
The evaporator drain connection must be
piped to an available strainer in order to
drain the evaporator even during operation. Install a gate valve in the drain line.
Thermometers and
Manometers
It is essential to install thermometers (items 5 and 12 in the figure) and
manometers (item 9) at the chilled water
inlet and outlet. These instruments must
be installed close to the unit, with a maximum scale of 1°C for thermometers and
0,1 kgf/cm2 for manometers.
Important: In order to avoid evaporator
damages, do not exceed a 150-psig water pressure.
The manometer with connection should
be installed at water inlet and outlet according to item 9 in the figure below in order
to avoid reading mistakes. Manometers
and thermometers must be installed at the
appropriate height to avoid parallax errors*.
Thermometers must be of glass or mercury-scale type, with colored contrasting
fluid, and provide easy reading.
- Manometers 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 must be equipped with
gate valves to isolate the evaporator during
service, and a globe valve must be installed at the outlet to adjust the water flow.
Flow-Switch
Verify that safety interlockings, particularly
the flow-switch, are installed in straight and
horizontal runs, with vanes adequate to the
pipe diameter, and the distance from curves and valves must be at least 5 times its
diameter, on each side.
Water treatment
The use of untreated or improperly treated
water may result in scaling, erosion, corrosion, algae and slime. The services of a
qualified water treatment specialist should
be engaged to determine what treatment,
if any, is advisable. Trane do Brasil assumes
no responsibility for equipment failures
resulting from the use of untreated or
improperly treated water.
8
9
1
2
3
4
5
Fig. 01 - Components
* Parallax error: Apparent displacement of an object, when the observation point changes. It is especially said of the apparent deviation of a measure instrument needle, when it is
not observed from a vertical point of view (parallax error).
8
Legend
1 - Drain
2- Joint
3- Flexible Connection
4- Water Flow Switch
10
11
12
14
S
6
7
13
5- Thermometer
6- Globe Valve
7- Cage Valve
8 - Air Purge
9- Manometers with cage valves
10- Joint
11- Flexible Connection
12- Thermometer
E
13- Water Filter
14- Cage Valve
E- Water Inlet
S- Water Output
CG-PRC002A-EN
Performance
Adjustment Factors
Fig. 02 - Evaporator Pressure Drop - 20 to 60 Tons Units
Load loss (Ft. of water)
Unit Conversion
From:
Gallons/min (GPM)
Feet of water (Ft Water) Pa
To:
L/s
Multiplier:
0,06308
2990
Fig. 03 - Evaporator Pressure Drop - 70 to 90 Tons Units
Load loss (Ft. of water)
Evaporator Water Flow (GPM)
Evaporator Water Flow ( L/s )
Load loss (kPa)
Evaporator Water Flow (GPM)
CG-PRC002A-EN
9
Performance
Adjustment Factors
Fig. 03a - Evaporator Pressure Drop - 100 to 120 Tons Units
Conversão de Unidades
De:
Galões/min (GPM)
Pés de Água (Ft Água)
Para: Multiplicador:
L/s 0,06308
Pa 2990
Fig. 03b - Evaporator Pressure Drop - 150 Tons Units
10
CG-PRC002A-EN
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