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.
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
Quantity2
Evaporator
Inlet connection
Outlet connection
Condenser
Type
No. of coils222444444444
Fins per inches
No. of rows
Fans
Quantity23346668868
Diameter
Air flow
RPMRPM
Motor power
Transmission typeDirectDirectDirectDirectDirectDirectDirectDirectDirectDirectDirectDirect
(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).
Notes:
(1) The values shown are in accordance with the operating conditions for the
ARI-590-92.
(2) The Consumption (KW) column is the nominal consumption of the
compressors in that condition.
(1) These values comply with operation conditions from ARI-590-92.
(2) The column Consumption (kW) represents the nominal compressor
consumption in that condition.
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
(1) These values comply with operation conditions from ARI-590-92.
(2) When dimensioning feeding cables and components, consider a
30%-increment in these nominal values.
(3) Starting current values represent the sum of the starting current
from the last compressor to enter operation and the nominal currents of
other compressors and fans.
14
CG-PRC002A-EN
Tab. 06 - Electrical Data - 50 Hz
Modelos
CGAD020
CGAD025
CGAD030
CGAD040
CGAD050
CGAD060
CGAD070
CGAD080
CGAD090
CGAD100
CGAD120
CGAD150
Components
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
Compressors
Fans
Total
(1) These values comply with operation conditions from ARI-590-92.
(2) When dimensioning feeding cables and components, consider a
30%-increment in these nominal values.
(3) Starting current values represent the sum of the starting current
from the last compressor to enter operation and the nominal currents of
other compressors and fans.
CG-PRC002A-EN
15
Independent
Control Module
Trane do Brasil makes the latest
microprocessor control technology
available to its clients. The CH530
controller with the DynaView control
module. The DynaView has a touch
sensitive liquid crystal display which gives
the user access to all information about
configuration, operating mode,
temperatures, electrical data, pressures
and diagnostics.
Safety Controls
The controller also provides a high level of
protection for the equipment, by constantly
monitoring the evaporator and condenser
pressure, current, voltage and temperature
variables. When one of these variables
approaches a limit which could cause the
unit to switch off, the controller starts a
number of actions, such as stepping the
compressors and fans, in order to keep
the equipment working before taking the
final decision to take it out of service. In
normal operation, the controller will always
optimize the unit's operation by stepping
the compressors and fans so as to ensure
the best energy efficiency level for the
equipment operating conditions.
External Controls
The controller provides a number of
different controls using external signals,
thus making equipment operation more
flexible.
Controls
Remote On/ Off -
on or off remotely by means of an NC
(normally closed) contact or switch..
Water Pump Interlock -The equipment
will be notified if there is water flow in the
evaporator by means of an auxiliary
contact in the water pump contactor and a
flow switch.
Water Pump Control -
an output to activate the evaporator water
pump contactor; an external control is
therefore not required to activate it.
Hot Gas Bypass Valve Control-
Hot Gas Bypass valve option is requested,
the controller has an output for operating
the valve based on the operational
information which the user sets in the
DynaView controller.
The unit can be switched
The controller has
When the
Controls
Emergency Stop - An NC contact or
external switch can be used to switch the
unit off in emergencies. The unit must then
be restarted manually using the DynaView.
This facility allows the unit to be switched
off by a fire alarm system, for example.
Optional Controls
Trane also offers an extremely wide range
of controls which are intended for
applications specific to individual
installations.
Remote Adjustment of the Chilled Water
Setpoint
The chilled water setpoint can be
controlled remotely by means of an analog
input, using a 0-10VDC or 4-20mA signal.
Signalling Relays
A set of 4 programmable relays can be
used for remote signaling of the unit's
operational status, such as maximum
capacity, operation at the limit,
compressors in operation and alarm
signaling.
Ice Making and Demand Control
The equipment can be put into ice making
mode externally by means of an NO
(normally open) contact. Unit demand
control can be carried out by means of an
NC (normally closed) contact in another of
this module inputs.
COMM3 Interface- This interface will
enable the equipment to be
interconnected to the Trane Tracer Summit
control and management system.
16
CG-PRC002A-EN
Protections and
Operational Protection Measures and
Functions
protection measures and functions
available are described below:
Compressor Internal Thermostats -
Trane compressors have internal
thermostats to protect the motor windings,
which are constantly monitored by the
controller.
Inversion and No Phase
The controller monitors the phase
sequence and the presence of current in
each phase by means of current sensors
installed in each of the supply phases.
Overload Relay
The supply for each compressor is via an
overload relay, which is constantly
monitored by the controller, which turns the
compressor off when an overload is
detected.
Balancing Starts / Operating Hours
The controller optimizes the start
sequence for the compressors by
balancing the number of starts and the
number of hours for each compressor, and
does not allow one compressor to have a
greater operating regime than the others.
Evaporator Water Flow
A suitable flow switch must be installed
and electrically connected to the controller
in order to report water flow in the
evaporator. This ensures that the
equipment either does not go into
operation or is shut down if there is no
water flow.
- The main operational
Controls
Low Pressure Limit
The controller will restrict the operation of
the compressors, by switching them off or
not allowing other compressors to start,
when the suction pressure approaches
the set cutout pressure.
External Temperature Cutout -
of the equipment can be controlled by the
temperature of the outdoor air, i.e. the
equipment will only go into operation when
the outdoor air temperature is above 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 Setpoint -
provide automatic adjustment of the chilled
water temperature setpoint based on the
outdoor air temperature or on the return
temperature of the water.
This kind of adjustment offers better
ambient temperature comfort control, as
well as providing energy savings and
allowing the customer to find the best
system control point.
Capacity Limiting during Starting
the equipment goes into operation and the
leaving water temperature is above 19ºC,
the controller will not allow the second
compressor to go into operation until the
leaving water temperature drops below
19ºC. This prevents the equipment from
being switched off due to high discharge
pressure because of compressor
overload.
The controller can
Operation
- When
Operational Functions
Starting in Cold Areas
When the equipment is installed in a
location where the ambient or outdoor
temperature is low, there is a possibility
that the equipment will be switched off
because of low pressure before there is
enough condensing pressure to send the
refrigerant back to the evaporator.
Therefore, cutout due to low pressure will
be ignored for a period; this period will vary
according to the outdoor temperature at
the location.
Operational Recovery and Service
Recovery
In equipment with reciprocating
compressors, recovery ensures that, when
started again, the liquid left in the
evaporator is not sucked in by the compressor, thus damaging it.
Unlike reciprocating ones, scroll
compressors tolerate flood back. However,
when required, operational recovery of the
refrigerant after the equipment or circuit in
operation has stopped can be undertaken.
In order to be able to use this function the
equipment must be equipped with
solenoid valves in the liquid line. The
purpose of service recovery is to recover
the refrigerant into the condenser so that
maintenance work can be carried out. This
recovery can only be done manually from
the controller. Optional valves in the
compressors suction and discharge can
be requested.
Anti-freeze Protection
The controller monitors the leaving water
temperature and will disable the
compressors when the water temperature
reaches the set cutout temperature.
High Pressure Protection
The controller constantly monitors the
pressure regulator installed in the
equipment discharge line and shuts the
circuit down when pressure greater than
the set maximum is detected.
.
CG-PRC002A-EN
17
Integrated Comfort
Modem
Workstation
VariTrane
Variable Air Volume
Room Temperature
Sensor
VariTrane
Variable Air Volume
Terminal
Remote
PC
®
®
Building
Control Unit
Diffuser
Workstation
PC
Exhaust Fan
Controls
Workstation
(Notebook)
Air Handler Unit
LAN
Building
Control Unit
System
The owner of an establishment or building
can monitor the chiller fully from the Tracer
system, as all the monitoring information
shown on the unit controller can be read
from the Tracer system display.
Furthermore, all the diagnostic 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 systems, from simple independent
units to ice making systems.
A single twisted pair of wires connected
directly between the chiller and a Tracer
Summit system provides control,
monitoring and diagnostic capabilities.
Control functions include switch on/ switch
off, adjustment of the leaving water
temperature setpoint, blocking compressor operation for demand limiting and
control of ice making mode. The Tracer
system reads the monitoring information,
such as entering and leaving evaporator
water temperatures and outdoor
temperature. The Tracer system can read
a large number of individual diagnostics
on equipment being controlled/ monitored.
In addition to this, it can provide
sequencing control for up to 25 units on
the same system.
Room Temperatura
Sensor
Diffuser
Tracer Summit - Trane Integrated
Comfort System (ICS)
The Tracer Summit Building
Management
System with Chiller Control provides
building automation and energy
management functions using independent
control. The Chiller Control is able to
monitor and control the complete installed
chiller system.
Available applications:
. Time programmer;
. Demand limiter
. Chiller sequencing
. Process control language.
. Boolean processing.
. Ambient controllers
. Reports and logs
. Personalized messages
18
Liquid Chiller
CGAD Trane
. Operating and maintenance time
. Trend log
. PID control loop
Of course, Trane Chiller Control can also
be used independently or in conjunction
with a complete building automation
system.
When one or more chillers are used with a
Tracer Summit system from Trane, the
units can be monitored and controlled
from a remote location.
The chillers can fit into a global building
automation strategy by using scheduling,
programmed changes, demand limiting
and chiller sequencing.
Required Options
COMM3 Communications Interface
Required Devices
Building Control Unit (BCU) and Tracer
Summit management software.
CG-PRC002A-EN
Integrated Comfort
Ice Making System Controls
The ice making option can be requested
with the chiller. The unit will have two
operating modes, ice making and normal
chilling. In ice making mode the chiller will
operate at total compressor capacity until
the return solution temperature matches
the setpoint for ice making. The chiller
needs two input signals. The first is an on/
off signal for scheduling and the second is
required to switch the unit between ice
making mode and normal operation. The
signals are supplied by a remote building
automation device, such as, for example, a
timer or a manual switch. The signals can
also be supplied by the Tracer System.
Additional Options which Can Also Be
Used
- Signalling Relays
Further Tracer Summit Characteristics-
Trane Chiller Systems Automation
Trane's experience in chillers and controls
makes us the preferred choice for chiller
automation. The Tracer Summit building
automation system from Trane has chiller
control capabilities which are unparalleled
in the industry. Our chiller automation
software is fully developed and tested by
Trane.
Energy Efficiency
Trane chiller automation manages chiller
starts so as to optimize the total energy
efficiency of the equipment. Sophisticated
software automatically determines which
chiller should be operating in response to
the current conditions. The software also
switches automatically between individual
chillers in order to ensure equal operating
time and wear between chillers.
Trane chiller automation allows unique
strategies for energy saving. An example is
the control of pumps and chillers based on
a view of the total energy consumption of
the system. The software intelligently
evaluates and selects the option with least
energy consumption.
Controls
Keeping Operators Informed
It is vital for efficient chiller operation to
ensure that operational personnel have
instant information on what is happening
in the equipment. By clearly describing the
chiller system, drawings with schematic
layouts of chillers, 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 increase or decrease chiller
capacity.
Chillers can be monitored and controlled
from a remote location. The Tracer Summit
provides standardized report templates
which list key operational data for problem
solving and performance checking. The
reports for each type of chiller and for chiller
sequencing systems are also
standardized. Detailed reports with chiller
operating times help in planning preventive
maintenance.
Rapid Response in Emergencies
We appreciate the importance of
maintaining chilled water production and at
the same time protecting your chillers from
expensive damage. If water flow into a
chiller's tubing is not detected, the start
sequence is interrupted in order to protect
the chiller and the next chiller within the
sequence is immediately started up to
maintain chilling. Should a problem occur,
the operator receives an alarm warning
and a diagnostic message to help solve
the problem quickly and accurately. An
instant report showing the system status
immediately before it was switched off
helps operators identify the cause. If the
emergency conditions warrant an
immediate manual shutdown the operator
can ignore the automatic control.
System
Documentation
The comprehensive documentation
covering chiller management practices is
now a fact of life. Trane chiller system
automation generates the reports defined
in the ASHRAE Guidelines.
ICS or Integrated Comfort System
Capabilities
When it is integrated with a tracer Summit
management system, Trane chiller
automation manages the coordination
with the Tracer Summit applications in
order to optimize global building operation.
With this system option, a large part of
Trane's HVAC* and control experience is
used to provide solutions for different parts
of the installation. If your project requires
an interface to other systems the Tracer
Summit system can share data using
BACNet, the ASHRAE open systems
protocol, MODBUS and other protocols
(subject to confirmation).
HVAC = Heating, Ventilation and Air Conditioning
CG-PRC002A-EN
19
Dimensional
COMPRESSORS
Fig. 07 - Unit Dimensions - CGAD 020C
Data
CGAD020C
NOTES:
1 - FIXING POINTS FOR VIBRATION INSULATORS (4 X.11,5-mm DIAM HOLES)
2 - VIBRATION INSULATORS ARE NOT SUPPLIED WITH THE EQUIPMENT.
20
Fig. 08 - Top View of Fans
CG-PRC002A-EN
Dimensional
Data
Fig.09 - Unit Dimensions - CGAD 025C / 030C
CGAD025C / 030C
CG-PRC002A-EN
Fig. 10 - 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 EQUIPMENT.
3 - UNITS NOT SPECIFIED: mm
21
Dimensional
Fig. 11 - Unit Dimensions - CGAD 040C
COMPRESSORS
Data
CGAD 040C
COMPRESSORS
22
Fig. 12 - 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 EQUIPMENT.
3 - UNITS NOT SPECIFIED: mm
CG-PRC002A-EN
Dimensional
DataCGAD 050C / 060C
Fig. 13 - Unit Dimensions - CGAD 050B / 060C
CG-PRC002A-EN
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 EQUIPMENT.
3 - UNITS NOT SPECIFIED: mm
23
Fig. 15 - Unit Dimensions - CGAD 070C
CONDENSING
COL
Dimensional
DataCGAD 070C
CONDENSING
COL
24
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 SPECIFIED: mm
CG-PRC002A-EN
Dimensional
COMPRESSORS
Data
Fig. 17 - Unit Dimensions - CGAD 080C / 090C
COMPRESSORS
CGAD 080C / 090C
CONDENSING
COL
CG-PRC002A-EN
Fig. 18 - 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 SPECIFIED: mm
25
Dimensional
Fig. 19 - Unit Dimensions - CGAD 100C
Data
CGAD 100C
26
Fig. 20 - 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 SPECIFIED: mm
CG-PRC002A-EN
Dimensional
Fig. 21 - Unit Dimensions - CGAD 120C
Data
CGAD 120C
CG-PRC002A-EN
Fig. 22 - 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 SPECIFIED: mm
27
Dimensional
Fig. 23 - Unit Dimensions - CGAD 150C
Data
CGAD 150C
28
Fig. 24 - 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 SPECIFIED: mm
CG-PRC002A-EN
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
CG-PRC002A-EN
NOTE:
Units: mm
29
Mechanical
Especifications
Evaporators
Shell & Tube evaporators are designed
according to the ASME standard for pressure vessels, without internal combustion,
and are factory tested with 225 psig at
refrigerant side (tubes) and 150 psig at
water side (casing). The evaporator casing
is made of carbon steel and the covers are
made of cast iron.
Plastic Baffle Plates
Carbon Steel
Mirror
Fig. 27 - Shell & Tube Evaporator
The copper tubes are internally-rifled,
seamless tubes, mounted and
mechanically expanded in carbon steel
mirrors to avoid refrigerant leaks. In order
to avoid tube vibration problems and
maintain the crossed drainage of evaporator water, traverse baffle plates are
mounted along the evaporator.
Thermal insulation of the assembly is
provided by 16-mm rubber sheets.
Internally-Rifled
Copper Tube
Water Flow
Condensers
Coil-type condensers are built with aluminum fins model Wavy-3B, 3/8"-OD
internally-rifled copper tubes, mechanically
expanded in the fins, and galvanized steel
structure, and are equipped with an integral sub-cooler. After manufacturing,
condensers are tested with a pressure
of 30 kgf/cm2 (425 psig).30 kgf/cm2
(425 psig).
Air Flow
Evaporator
Fan
Fig. 22- Condenser Air Flow
Coils
Refrigerating lines
Trane CGAD Air-Cooled Liquid Chillers are
equipped with the following refrigerating
lines:
ModelSuctionDischargeLiquid
020
025
030
040
050
060
070
080
090
100
120
150
1 5/8"1 3/8"
2 1/8"1 3/8"
2 1/8"1 3/8"
2 x 1 5/8"2 x 1 3/8"
2 x 2 5/8"2 x 1 3/8"
2 x 2 5/8"2 x 1 3/8"
2 x 2 5/8"2 x 1 3/8"2 x 1 1/8"
2 x 2 5/8"2 x 1 3/8"2 x 1 1/8"
2 x 2 5/8"2 x 1 3/8"2 x 1 1/8"
2 5/8"
2 5/8"
3 1/8"
1 5/8"
1 5/8"
2 1/8"
7/8"
7/8"
7/8"
2 x 7/8"
2 x 7/8"
2 x 7/8"
1 1/8"
1 1/8"
1 1/8"
30
CG-PRC002A-EN
Mechanical
Especifications
Cooling Components
Trane 20, 25 and 30Tons CGAD AirCooled 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. 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 increases motor life.
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 suction connection.
B
. The refrigerant passes through a cavidaty between the rotor and the stator, cooling
the motor .
C. The refrigerant speed decreases when it
leaves the motor cavity and the oil is separated. 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 through a hole in the center of the fixed Scroll.
The hood function is to amortize the refrigerant flow, reducing vibrations. Then the
refrigerant leaves the compressor through
the discharge connection.
Notas:
(1) The length measurements take into account the depth of the electrical frame coupled to the equipment.
(2) The floor area measurements do not take into account the base of the electrical frame coupled to the equipment.
)
1
(
T
H
D
I
W
HEIGHT
32
CG-PRC002A-EN
Trane Brazil
Av. dos Pinheirais, 565 - Estação
83.705-570 - Araucária, PR - Brazil
www.trane.com.br
mkt.brasil@trane.com
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 change
designs and specifications without notice.
CG-PRC002A-EN
PL-000-CG-PRC002A-EN 0606
CG-PRC002-EN (04/04)
Brazil
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