Trane Refrigerator ctv prc007 en User Manual
CenTraVac™  
Liquid Chillers  
Centrifugal Liquid Chillers/  
Water-Cooled  
170-3500 Tons  
50 and 60 Hz  
Built For the Industrial and Commercial Markets  
CVHG — Three Stage  
CVHE — Three Stage  
170 500  
450  
1300  
CVHF — Two-Stage CenTraVac  
325  
1750  
LHCV — Module CenTraVac  
1300  
3500  
GPC — Gas Powered CenTraVac Package  
170  
3500  
April 2001  
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Contents  
Introduction  
2
6
Features and Benefits  
Components, Standard and Optional Features,  
Factory Performance Testing,  
Refrigeration Cycle, Control Panel  
Unit Options  
13  
21  
Unit Mounted Starter, Adaptive Frequency Drives,  
Free Cooling  
System Options  
Auxiliary Condenser, Ice Storage, Heat Recovery,  
Chilled Water Resets  
Application Considerations  
Selection Procedure  
Performance Data  
Jobsite Connections  
Controls  
26  
28  
30  
32  
33  
39  
41  
48  
Weights  
Physical Dimensions  
Mechanical Specifications  
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Trane Hermetic  
Centrifugal  
Water Chillers  
Introduction  
Trane GPC* Benefits  
ISO 9001 Certification  
A Tradition of Innovation  
Combines two industry-recognized  
ISO 9001 Certification applies to the  
Trane La Crosse Business Unit. This  
process is based on the La Crosse  
Business Unit’s ISO 9001 certified quality  
system. This system is documented in  
procedures which define how quality  
assurance activities are managed,  
performed, and continuously monitored.  
Included in the system are verification  
checkpoints from the time the order is  
entered until final shipment. In addition,  
product development for the  
•
The first Trane centrifugal chiller, the  
Turbovac™ was introduced in 1938. The  
simple, direct drive, slow speed design  
of the Turbovac revolutionized the air  
conditioning industry. The chiller was  
attractive to customers because its  
hermetic design reduced frequent  
service requirements.  
In 1951 the Trane CenTraVac™ centrifugal  
chiller was introduced. Its unique two  
stage compressor with multiple inlet  
guide vanes and patented economizer  
reduced energy consumption on typical  
applications to less than 0.8 kW/ton.  
and proven products, the Trane  
Earth•Wise CenTraVac and Waukesha  
Enginator  
Ability to do both base and peak  
•
•
shaving  
No on-site piping connections  
Refrigerant leaks minimized  
•
No need to remove refrigerant  
•
charge from chiller during downtime  
Installations more flexible, simpler  
•
and cost effective  
Ability to place the engine generator  
marketplace is subjected to formal  
planning, review and validation. The  
system is designed to assure maximum  
consistency in meeting customer  
requirements.  
•
set in a location remote of the chiller  
Allows for efficient use of plant floor  
•
•
space  
The model PCV CenTraVac chiller that  
was introduced in 1966, allowed quality  
air conditioning for applications as small  
as 120 tons.  
Provides flexibility in sound sensitive  
work areas  
The Beauty of Simplicity  
The reliability of a centrifugal chiller  
starts with its basic product design. At  
Trane we’ve found that the straightest  
path to reliability is simplicity. Years of  
research and field testing have honed  
the design of the CenTraVac chiller to a  
simple, precise solution to a complex  
engineering problem.  
*Limited availability for International orders –  
Please contact International CenTraVac Marketing  
Group.  
In 1982 the CenTraVac chiller solidified  
its position as the industry leader by  
introducing a three-stage compressor  
and a two-stage economizer. As a result,  
this chiller was 5 to 20 percent more  
efficient than previous designs.  
Unmatched Expertise  
The performance and reliability of a  
CenTraVac™ chiller is backed by a team  
of experienced field sales engineers with  
support from headquarters experts. No  
other manufacturer can offer that degree  
of support to its customers.  
Today’s CenTraVac chiller still relies on  
the dependability of the proven direct  
drive and exclusive slow speed  
operation. Low operating costs and high  
reliability continue to be the CenTraVac  
chiller hallmark.  
This simple design provides efficiency  
and reliability benefits. The Trane  
CenTraVac chiller has only one moving  
part — no gear boxes, couplings or extra  
shafts. The single rotating shaft is  
supported by two aircraft turbine grade/  
rated bearings. This direct drive concept  
minimizes the chance of failure for  
moving parts. It also reduces wear and  
drag on parts, resulting in more efficient  
operation.  
In the design phase, application  
engineers can help answer your  
questions or solve your problems.  
During the selection phase, software  
engineers are available to help you  
evaluate equipment alternatives. At the  
installation stage, field start-up of the  
CenTraVac chiller is included in the  
purchase price. Trane offers this support  
and more when you need it.  
When a source of energy other than  
electricity is required  
The Trane CenTraVac has the standard  
option of being coupled to a Waukesha  
Enginator to quite simply convert  
natural gas to chilled water. With COPs  
in the range of 1.5 to 2.2 depending on  
options selected, makes this option a  
very simple and attractive alternative  
when an alternative fuel source is  
desired.  
Delivery And Design Flexibility  
If delivery time is a priority, Trane can  
meet your needs with a variety of quick  
shipment choices. Most fast track  
building schedules can be met with one  
of these choices.  
Design flexibility means Trane can  
custom build a unit to specific job  
requirements. Design parameters such  
as shell type, compressor, kW/ton,  
waterside pressure drop, as well as full  
and part load performance can be built  
to meet requirements.  
4
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Introduction  
1939 — The Trane Turbovac  
1992 — The two-stage CVHF CenTraVac  
Chiller  
1982 — The three-stage CVHE CenTraVac  
Chiller  
1951 — The original Trane CenTraVac  
chiller  
1992 — The LHCV CenTraVac Modular Chiller system  
1965 — The Model PCV CenTraVac  
chiller  
3 Phase Power  
Control Interface  
//  
Specific Trane centrifugal chiller  
performance is certified by ARI Standard  
550/590. Trane centrifugal chillers tested  
within the scope of the ARI program  
display the ARI symbol of compliance  
(shown on back cover) to certification  
sections of ARI Standard 550/590.  
Purifier™ purge with Purifier Plus™ are  
rated in accordance with ARI  
Standard 580.  
115 VAC/60 Hz/50 Hz  
Control Interface  
//  
1997 — The Gas Powered CenTraVac (GPC) Chiller Package  
Those applications in this catalog  
specifically excluded from the ARI  
certification program are:  
Low temperature applications,  
•
including ice storage  
Glycol  
•
Chillers above 2000 tons  
•
Free cooling  
•
Heat recovery  
•
Auxiliary condenser  
•
Chillers that are 50 Hertz  
•
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Attributes of  
Low Pressure  
Chiller Operation  
Features and  
Benefits  
environment friendly HCFC- 123. Trane  
CenTraVac chillers provide the safety of  
low pressure with continued product  
improvement in leak proof design.  
Consider the following benefits of low  
pressure over high pressure chillers.  
Comparing the Attributes of  
Low Pressure Chiller Operation  
to High Pressure Chiller  
Operation.  
Trane CenTraVac chillers continue to offer  
time tested and proven low pressure  
refrigerants including the alternative  
Low Pressure  
Medium/High Pressure  
Evaporator  
Condenser  
Always at low negative pressure  
Always at positive pressure  
•
•
•
•
•
Air leaks inward at low rate  
Refrigerant leaks outward at moderate rate  
•
Refrigerant lost: (# air leak in) x purge efficiency*  
No refrigerant loss is into equipment room (vented to the  
outside via purge)  
At positive pressure during operation  
Usually at negative pressure during inactivity (air leaks  
inward)  
Refrigerant loss is into equipment room  
Always at high positive pressure  
•
•
•
•
Refrigerant leaks outward at very low rate during operation  
Trane Purifier Purge is able to continuously monitor  
in-leakage with a purge timer  
Refrigerant monitor as required by ASHRAE  
Purge timer can be connected to building automation  
system for notification of increased purge operation (in-  
leak). Similarly, the refrigerant monitor can be connected to  
the building automation system.  
Refrigerant leaks outward at very high rate  
Only ways to monitor leak rate on high pressure chiller are  
— periodic leak checks  
•
•
•
•
Monitoring  
of leak rate  
— purchase refrigerant monitor  
•
•
Refrigerant monitor as required by ASHRAE  
Normally the only time that a leak is detected on a high  
pressure chiller is during spring start-up. This means that a  
chiller which develops a leak in the summer, may leak  
continuously until the following spring.  
•
•
HCFC-123  
HFC-134a  
Typical  
Pressures  
(38°F evap.)  
(100°F cond.)  
Evap: 18.7 inches of Mercury  
Cond: 6.1 psig  
Evap: 33.1 psig  
Cond: 124.1 psig  
*Trane Purifier Purge efficiency does not exceed 0.002 lbs./refrigerant/lbs.-air  
6
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Features and  
Benefits  
Control  
Panel  
Capabilities include:  
Operator Control Panel  
Super-twist LCD display with  
•
•
Trane has multi-language support for all  
backlighting for readability.  
chillers controlled by the UCP2™  
Chiller data (more than 200 items)  
including but limited to: CVHE, CVHF,  
CVHG, GPC and LHCV alarm. The  
standard Clear Language Display (CLD)  
supports eight languages including  
English, French, German, Spanish,  
Katakana, Italian, Portuguese and Dutch.  
The Complex Character CLD was added  
to support languages such as Traditional  
and Simplified Chinese, Japanese, Thai  
and Korean.  
including:  
- Status  
- Setpoints  
- Field start-up items  
- Machine configuration items  
- Service test items  
Status reports:  
- Chiller Report  
•
- Refrigerant Report  
- Compressor Report  
Custom report capability.  
The Complex Character CLD is available  
as a retrofit kit for the standard CLD on  
the UCP2 panel. With the same wiring  
and mounting, it is as simple as  
disconnecting two wires, unbolting the  
existing CLD, bolting on the Complex  
Character CLD and reconnecting the two  
wires.  
•
More than 100 diagnostic messages  
•
including a history log of the last 20  
diagnostics  
- An alarm indicator  
- Expanded help messages  
- Operator security  
- Internationally recognized symbols  
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Features and  
Benefits  
Components  
Controls and paints for outdoor  
use or corrosive environments  
Internally enhanced or  
smooth bore tubes  
Various tube materials  
and thicknesses  
Victaulic or  
flanged  
connections  
UL label  
Full complement of electrical  
starters and accessories  
(unit mounted or remotely)  
Marine or standard  
waterboxes  
1, 2, 3, pass evaporator  
- Panel chilled water reset  
- External chilled water and current limit  
setpoints  
Factory installed insulation  
- Evaporator / Condenser differential  
pressure  
- Condenser relief request  
- Maximum capacity  
- Communication link to BAS  
- Printer module  
Special construction to facilitate  
chiller disassembly for construction  
projects with tight space clearances  
or component weight limitations  
8
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Standard  
and Optional  
Features  
Features and  
Benefits  
Standard Features  
The following features are provided as  
standard with all Trane CenTraVac™  
chillers:  
Optional Features  
Trane offers a selection of optional  
features to either complete the basic  
chiller installation or to allow  
modification for special purpose  
applications.  
Motor-compressor assembly with  
•
integral lubrication system.  
Evaporator condenser assembly.  
Two-stage economizer assembly on  
CVHE/CVHG style units (single-stage on  
CVHF style units).  
Prewired instrument and control panel.  
Oil and refrigerant charge.  
Oil heater.  
Isolation pads  
Wiring and conduit for purge and oil  
Medium voltage (over 600 volts)  
•
•
hermetic compressor motor  
construction.  
•
Complete line of compressor motor  
•
•
starters.  
•
Unit mounted starter accessory on low  
•
voltage units up to an RLA of  
1080 amps.  
•
•
Marine waterboxes for evaporators  
•
•
•
system interconnection to the main  
control panel.  
and condensers  
High pressure (300 psig working  
Installation, operation, and  
pressure) water side construction.  
•
•
•
maintenance instructions.  
Free cooling.  
•
Start-up and operator instruction  
Heat recovery or auxiliary condensers.  
•
service.  
Smooth bore tubing.  
•
Advanced motor protection.  
Factory-applied thermal insulation  
•
One-inch deflection spring isolators for  
•
CenTraVac Motor  
vibration-sensitive installations.  
The motor provided in the Trane  
CenTraVac chiller is a specially designed  
squirrel cage, two pole induction motor  
suitable for 50 and 60 hertz, three-phase  
current.  
Building automation systems (BAS)  
•
interface  
Variable speed drives  
•
Internally enhanced tubes  
•
Various tube wall thicknesses  
•
Trane CenTraVac motors are cooled by  
liquid refrigerant surrounding the motor  
windings and rotor. Use of liquid  
refrigerant results in uniform low  
temperatures throughout the motor,  
thereby promoting long motor life.  
UL Label  
•
Three pass evaporator/one pass  
•
evaporator  
Special construction to facilitate chiller  
•
disassembly at the job  
CuNi Tubes  
•
Special paint and controls for outdoor  
•
Refrigerant/Oil Pump Motor  
The oil pump motor is a 120 volt,  
50/60 hertz, 3/4 hp, 1 phase motor with  
protective fusing and panel mounted  
contactor.  
use or corrosive environments  
Unit mounted refrigerator monitor  
•
Purge  
The purge unit motor is a 120 volt,  
50/60 hertz, 3/4 hp, 1 phase motor with  
integral overload protection and panel  
mounted contactor.  
The use of an air-cooled condensing unit  
obtains separation temperatures in the  
purge drum as low as 0°F. Normal  
operating efficiency does not exceed  
0.002 lbs. of refrigerant lost per pound of  
dry air removed. The purge system can  
be operated at any time, independent of  
chiller operation.  
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Factory  
Performance  
Testing  
Features and  
Benefits  
The single package design of the  
panel are tested before final assembly.  
After assembly, performance testing of  
the chiller can confirm proper operation  
and virtually eliminate jobsite start-up  
problems.  
Factory Testing for  
CenTraVac chiller allows testing of each  
assembled chiller at the factory. Actually  
all components including the evaporator,  
condenser, compressor and control  
Assured Performance  
To prove that your chiller will perform as  
promised, Trane offers factory  
performance testing, which you can  
witness.  
Trane provides laboratory-grade,  
calibrated performance testing on  
ARI approved test loops that proves the  
performance of the chiller tailored to  
your application. The test provides:  
Confirmed efficiency  
•
•
Confirmed capacity  
•
Smooth trouble-free start-up confirmed  
through factory testing and  
commissioning of both chiller and  
controls  
Trane believes centrifugal chiller testing  
is so important that we invested over $2  
million in CenTraVac testing facilities.  
Testing is in accordance with ARI  
Standard 550/590 and calibration of  
instrumentation meets or exceeds the  
National Institute of Standards  
Technology (NIST).  
The industry has responded to the  
demand for more efficient chillers by  
developing machines with component  
mix-matching and many money saving  
options. It’s possible that with the  
thousands of component combinations  
available, a specific chiller combination  
may be laboratory tested for the first  
time.  
Trane offers two levels of CenTraVac  
performance testing:  
A performance test at design  
•
•
conditions plus a certified test report.  
A customer-witnessed performance  
test at design conditions plus a certified  
test report.  
Trane is part of the ARI 550/590  
certification program. The selection  
program and machines bear the ARI seal  
of approval. Performance testing is a key  
part of this program. While the  
certification program is technically  
sound, a factory run test, with your  
machine on the test stand, is still the best  
way to confirm machine performance  
and a trouble-free start-up.  
During customer witnessed performance tests of Trane CenTraVac chillers, a nickel  
can be balanced on the edge of the compressor-motor assembly, demonstrating the  
extremely low vibrations generated by the unit while operating at full and part load  
conditions.  
10  
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Features and  
Benefits  
Refrigeration  
Cycle  
The CenTraVac™ Chiller Operating Cycle  
Design Simplicity  
Direct Drive Design — No Gear Losses  
The direct drive compressor operates  
without speed increasing gears, thus  
eliminating gear energy losses.  
Compressors using gears suffer mesh  
losses and extra bearing losses in the  
range of three to five percent at full load.  
Since these losses are fairly constant  
over the load range, increasingly larger  
percentage losses result as load  
decreases.  
Two-Stage Economizer  
Impellers are keyed directly to the motor  
shaft for high reliability and performance  
and low life-cycle costs.  
The CVHE/CVHG CenTraVac chiller has a  
two-stage economizer — providing up to  
seven percent greater efficiency than  
designs with no economizer. Since the  
CVHE/CVHG uses three impellers, it is  
possible to flash refrigerant gas at two  
intermediate pressures between the  
evaporator and condenser pressures,  
significantly increasing chiller efficiency.  
This improvement in efficiency is not  
possible in single-stage chillers since all  
compression is done by one impeller.  
Reliable Motor Cooling  
The motor is engulfed in liquid  
refrigerant to provide efficient, complete  
cooling at all load conditions. This  
system is reliable and easy to maintain.  
Fixed Orifice Flow Control  
For proper refrigerant flow control at all  
load conditions, the CenTraVac design  
incorporates the Trane patented fixed  
orifice system. It eliminates float valves,  
thermal expansion valves and other  
moving parts. Since there are no moving  
parts, reliability is increased.  
Multiple Stages of Compression  
The compressor operates more  
efficiently over a wide range of  
capacities, virtually eliminating the need  
for energy wasting hot gas bypass as  
typically found on single stage chillers.  
Single Stage Economizer  
The CVHF CenTraVac chiller has a single-  
stage economizer — providing up to 41/2  
percent greater efficiency than designs  
with no economizer.  
The radial component of velocity  
determines the ability of the chiller to  
resist interruption of smooth refrigerant  
flow when operating at light loads and  
with high condensing temperatures. This  
interruption in flow and unstable  
operation, called “surge” is avoided with  
the two-stage design.  
Quiet Operation  
Since the CVHF CenTraVac uses two  
impellers, it is possible to flash  
With only one moving component — the  
rotor and impeller assembly — the Trane  
low speed, direct drive design operates  
exceptionally quietly. The smoothly  
rotating CenTraVac compressor is  
inherently quieter than other compressor  
types. Typical CenTraVac chiller sound  
measurements are among the quietest in  
the industry. Trane can guarantee sound  
levels with factory testing and  
refrigerant gas at an intermediate  
pressure between the evaporator and  
condenser pressures, significantly  
increasing chiller efficiency. This  
improvement in efficiency is not possible  
in single-stage chillers since all  
Inlet Guide Vanes  
compression is done by one impeller.  
Part load performance is further  
improved through use of moveable  
designed variable inlet guide vanes. Inlet  
guide vanes improve performance by  
throttling refrigerant gas flow to exactly  
meet part load requirements and by  
prerotating refrigerant gas for optimum  
entry into the impeller. Prerotation of  
refrigerant gas minimizes turbulence and  
increases efficiency.  
measurements in accordance with  
ARI standard 575.  
The Reliability Standard  
Just as a multi-stage turbine is more  
efficient than a single stage turbine, the  
CenTraVac multi-stage compressors are  
more efficient and reliable than single-  
stage designs.  
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Features and  
Benefits  
Refrigeration  
Cycle (Cont.)  
Three-Stage CenTraVac P-H Diagram  
CenTraVac Two-Stage P-H Diagram  
The pressure-enthalphy (P-H) diagram  
describes refrigerant flow through the  
major CVHF chiller components. This  
diagram confirms the superior operating  
cycle efficiency of the two- stage  
further increasing its temperature and  
pressure to state point 5, then discharges  
it to the condenser.  
Condenser — Refrigerant gas enters the  
condenser where the system cooling  
load and heat of compression are  
rejected to the condenser water circuit.  
This heat rejection cools and condenses  
the refrigerant gas to a liquid at state  
point 6.  
compressor and economizer.  
Evaporator — A liquid-gas refrigerant  
mixture enters the evaporator at state  
point 1. Liquid refrigerant is vaporized to  
state point 2 as it absorbs heat from the  
system cooling load. The vaporized  
refrigerant then flows into the  
Patented Two-Stage Economizer and  
Refrigerant Orifice System-Liquid  
compressor first stage.  
refrigerant leaving the condenser at state  
point 6 flows through the first orifice and  
enters the high pressure side of the  
economizer. The purpose of this orifice  
and economizer is to preflash a small  
amount of refrigerant at an intermediate  
pressure called P1. P1 is between the  
evaporator and condenser pressures.  
Preflashing some liquid refrigerant cools  
the remaining liquid to state point 7.  
Compressor First Stage — Refrigerant  
gas is drawn from the evaporator into  
the first stage compressor. The first stage  
impeller accelerates the gas increasing  
its temperature and pressure to state  
point 3.  
CenTraVac™ Three-Stage P-H Diagram  
The pressure-enthalphy (P-H) diagram  
describes refrigerant flow through the  
major CVHE/CVHG chiller components.  
This diagram confirms the superior  
operating cycle efficiency of the three-  
stage compressor and two-stage  
economizer.  
Compressor Second Stage —  
Refrigerant gas leaving the first stage  
compressor is mixed with cooler  
refrigerant gas from the economizer.  
This mixing lowers the enthalpy of the  
mixture entering the second stage. The  
second stage impeller accelerates the  
gas, further increasing its temperature  
and pressure to state point 4.  
Refrigerant leaving the first stage  
economizer flows through the second  
orifice and enters the second stage  
economizer. Some refrigerant is  
preflashed at intermediate pressure P2.  
Preflashing the liquid refrigerant cools  
the remaining liquid to state point 8.  
Evaporator — A liquid-gas refrigerant  
mixture enters the evaporator at state  
point 1. Liquid refrigerant is vaporized to  
state point 2 as it absorbs heat from the  
system cooling load. The vaporized  
refrigerant then flows into the  
Condenser — Refrigerant gas enters the  
condenser where the system cooling  
load and heat of compression are  
rejected to the condenser water circuit.  
This heat rejection cools and condenses  
the refrigerant gas to a liquid at state  
point 6.  
Economizer and Refrigerant Orifice  
System-Liquid refrigerant leaving the  
condenser at state point 6 flows through  
the first orifice and enters the  
economizer. The purpose of this orifice  
and economizer is to preflash a small  
amount of refrigerant at an intermediate  
pressure called P1. P1 is between the  
evaporator and condenser pressures.  
Preflashing some liquid refrigerant cools  
the remaining liquid to state point 8.  
Another benefit of flashing refrigerant is  
to increase the total evaporator  
refrigeration effect from RE’ to RE. The  
economizer provides a 41/2 percent  
energy savings compared to chillers with  
no economizer. To complete the  
operating cycle, liquid refrigerant leaving  
the economizer at state point 8 flows  
through a second orifice system. Here,  
refrigerant pressure and temperature are  
reduced to evaporator conditions at state  
point 1.  
compressor first stage.  
Another benefit of preflashing refrigerant  
is to increase the total evaporator  
refrigeration effect from RE’ to RE. The  
two-stage economizer provides a seven  
percent energy savings compared to  
chillers with no economizer.  
Compressor First Stage — Refrigerant  
gas is drawn from the evaporator into  
the first stage compressor. The first stage  
impeller accelerates the gas increasing  
its temperature and pressure to state  
point 3.  
To complete the operating cycle, liquid  
refrigerant leaving the economizer at  
state point 8 flows through a third orifice  
system. Here, refrigerant pressure and  
temperature are reduced to evaporator  
conditions at state point 1.  
Compressor Second Stage —  
Refrigerant gas leaving the first stage  
compressor is mixed with cooler  
refrigerant gas from the low pressure  
side of the two-stage economizer. This  
mixing lowers the enthalpy of the  
mixture entering the second stage. The  
second stage impeller accelerates the  
gas, further increasing its temperature  
and pressure to state point 4.  
Two-Stage CenTraVac P-H Diagram  
Compressor Third Stage — Refrigerant  
gas leaving the compressor second  
stage is mixed with cooler refrigerant  
gas from the high pressure side of the  
two-stage economizer. This mixing  
lowers the enthalpy of the gas mixture  
entering the third stage compressor. The  
third stage impeller accelerates the gas,  
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Unit  
Options  
Unit Mounted  
Starter  
Autotransformer, closed transition  
systems. However, the responsibility for  
providing proper starting and control  
systems must remain with the system  
designer and the installer.  
•
Unit-Mounted Starters  
Solid-state starters  
•
Trane factory installed options make  
installation of a CenTraVac™ chiller easier,  
faster and less costly. Another example  
of the Trane packaged concept is the  
factory installed unit-mounted star delta  
starter available on CenTraVac chillers up  
to 1300 tons capacity or solid-state  
starters up to 1000 tons, depending on  
jobsite electrical requirements. It’s a  
single chiller/starter package designed  
for years of reliable operation and low  
life-cycle costs.  
Medium Voltage (2300 to 6000 Volts)  
Full voltage  
•
Primary reactor, closed transition  
Contact your local Trane sales office for  
further information.  
•
Autotransformer, closed transition  
•
Medium voltage starters are provided as  
standard with a non-load break isolation  
switch and current limiting fuses.  
The typical equipment room layout for a  
Trane CenTraVac™ unit or remote  
mounted starter are shown in Figures  
O-1 and O-2. A NEMA 1, star-delta (wye-  
delta) type closed transition reduced  
voltage motor starter is mounted, as an  
optional accessory, on Trane CenTraVac  
chillers rated up to and including 1080  
RLA on low voltage (600 volts and  
below) systems. All power and control  
wiring between the starter and the chiller  
are factory assembled. Factory assembly  
enhances total system reliability and  
integrity. Total installed chiller/starter  
costs are significantly reduced by the  
unit mounted starter option rather than a  
conventional remote mounted starter.  
All starters provided by Trane include the  
following standard features for safe,  
efficient application and ease of  
installation:  
Installation cost is reduced by eliminating  
chiller-to-starter, starter-to-disconnect  
and starter-to-control panel field wiring.  
All this wiring is completed and tested in  
the factory, ensuring electrical integrity.  
Since most wiring is factory completed,  
electrical system design time is reduced.  
NEMA 1 starter enclosure.  
•
120 volt, 60 hertz, 1 phase fused pilot  
•
and safety circuits.  
Control power transformer (4.0 KVA)  
•
with 120 volt, 50 or 60 hertz, single-  
phase.  
One pilot relay to initiate start  
•
Starter components are pre-engineered  
and selected to provide a reliable, cost  
effective chiller/starter package. This  
single source responsibility for the  
CenTraVac chiller and unit-mounted  
starter package is a real advantage.  
Potential scheduling problems  
associated with separate starter and  
chiller installations are eliminated. When  
the CenTraVac chiller arrives at the  
jobsite with the unit-mounted starter, the  
only remaining wiring is the main power  
wiring to the disconnect switch, and a  
few simple electrical interlocks to the  
chilled water and condenser water flow  
sensing devices.  
sequence from CenTraVac control  
circuit signal.  
Starter enclosures capable of being  
•
•
padlocked.  
Benefits  
Automatic transfer from wye to delta  
Reduces starter installation costs 20 to  
•
•
•
on any two-step starter.  
35 percent:  
By eliminating chiller-to-starter field  
In addition, Trane offers a wide selection  
of optional starter features.  
Starters with standard or high  
wiring  
By eliminating starter-to-disconnect  
•
switch field wiring (when optional  
circuit breaker is used)  
interrupting capacity circuit breakers,  
to provide disconnect means and short  
circuit protection (low voltage only).  
By eliminating field installed  
•
disconnect switch (when optional  
circuit breaker is used)  
Ammeters and voltmeters.  
•
Special function pilot lights.  
•
By eliminating starter mounting pad  
Special NEMA enclosures.  
•
•
and required equipment room floor  
space  
Ground fault protection.  
•
To ensure a trouble-free start-up on the  
electrical side, the unit-mounted starter is  
tested with the chiller as part of the  
factory performance testing program.  
Power factor correction capacitors.  
•
By eliminating control wiring from  
I.Q. Data Plus monitor device.  
•
•
•
•
•
starter to control panel  
If the CenTraVac compressor starting  
equipment is provided by others, the  
starter must be designed in accordance  
with the current Trane standard  
engineering specification “Water-Cooled  
CenTraVac™ Starter Specification.” It is  
also recommended that two copies of  
the interconnecting and control circuit  
wiring diagrams be forwarded to The  
Trane Company for review. This service  
is provided at no charge, and is intended  
to help minimize the possibility that  
Trane CenTraVac chillers will be applied  
in improper starting and control  
Electrical system reliability is  
enhanced:  
Our commitment to customer and  
equipment safety offers the Underwriters  
Laboratories Inc. (UL) mark of safety on  
both chiller and starter and available  
accessories.  
By reducing the number of field  
electrical connections  
By making starter-to-chiller electrical  
connections under factory-controlled  
conditions  
Compressor Motor Starting Equipment  
Features  
Trane can provide compressor motor  
starting equipment built to rigid Trane  
specifications. The types of starters  
available include:  
By testing the entire chiller/starter  
•
•
combination, in the factory  
By providing control components  
designed to operate with the unique  
CenTraVac motor/compressor start and  
protection subsystem  
Single Source Responsibility  
Low Voltage (200 to 600 volts)  
•
Trane retains complete responsibility  
for the starter and associated chiller/  
starter interconnecting wiring.  
Star (wye)-delta closed transition  
Full voltage  
•
•
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Unit  
Options  
Unit Mounted  
Starter (Cont.)  
motor windings is reduced to one  
divided by the square root of three or  
0.58 times line voltage. This reduction in  
winding voltage results in a reduction in  
inrush current. The inrush current is 0.33  
times the full voltage locked rotor current  
rating of the motor. The accelerating  
torque of the motor is also reduced to  
0.33 times the full voltage torque rating.  
This is sufficient to fully accelerate the  
compressor motor. The unit control  
panel monitors motor current during  
operation via current transformers  
located in the starter enclosure. When  
during acceleration the line current  
drops to approximately 0.85 times rated  
load current, transition is initiated. The  
closed transition feature provides for a  
continuous motor current flow during  
transition by placing resistors in the  
circuit momentarily. This prevents  
buildup of damaging torques to the  
system during this period. With the  
completion of transition, the motor  
windings are connected in the delta  
configuration with full line voltage.  
System Design Time Cost Savings  
System design time is reduced, since  
all starter components and  
interconnecting wiring are pre-  
engineered and selected.  
Complete package available with  
Agency Approval  
Application  
Reliability  
•
•
The unit mounted starter is a star-delta  
closed transition electromechanical  
starter. Motor starters of this  
configuration have proven reliability in  
thousands of centrifugal chiller  
applications around the world. The  
proven electromechanical concept plus  
the use of industrial quality  
components makes the CenTraVac unit  
mounted starter dependable in all kinds  
of service applications.  
•
•
The Trane unit mounted starter can be  
applied on low voltage (600 volts) and  
below applications up to  
approximately 1300 tons capacity. To  
determine the unit mounted starter to  
be used with a particular selection, it is  
necessary to know the current draw of  
the compressor motor. The starter  
current draw must be greater than, or  
equal to, the compressor motor  
current draw.  
Operation  
The unit mounted starter is a star (wye)  
delta, closed transition, reduced voltage  
starter. When starting and during  
acceleration, the motor is connected in  
its wye configuration. Because of this  
arrangement the voltage applied to the  
Figure O-1 – Typical Equipment Room Layout – Conventional Remote Star-Delta Starter  
Three precision current transformers  
monitor phase current. Contactor  
position and various voltage signals  
provide extensive interlocking between  
the starter and the microcomputer in the  
CenTraVac™ control panel. All logic and  
subsequent instruction originate in the  
unit control panel. Protection against the  
following starter defects is provided:  
High motor current (starting and  
•
running)  
Improper starter circuitry  
•
Excessive accelerating time  
•
Incomplete starting sequence  
•
Loss of phase  
•
Phase amperage unbalance  
•
Phase reversal  
Distribution fault  
•
•
Figure O-2 – Typical Equipment Room Layout – Unit-Mounted Star-Delta Starter  
Features  
The Trane CenTraVac Unit Mounted  
Starter includes the following standard  
features:  
NEMA 1 enclosure, designed to  
•
•
accommodate padlock  
3 KVA control power transformer with  
120V secondary  
Fused 120V control circuit  
•
3-phase incoming line terminals  
•
6 output load terminals factory-  
•
connected to the motor  
14  
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Unit Mounted  
Starter (Cont.)  
If the gate pulse is applied sooner in the  
cycle, a greater increment of the wave  
form is passed through, and the output  
is increased. So, by controlling the SCR’s  
output voltage, the motor’s acceleration  
characteristic and current inrush can be  
controlled. These forms are shown in  
Figure O-4.  
The solid-state starter controls the  
starting characteristics of a motor by  
controlling the current that flow to the  
motor. It does so through the use of  
SCRs (Silicon Controlled Rectifiers),  
which are solid-state switching devices,  
and an integral bypass contactor for  
power control.  
Available options include:  
Circuit Breaker — A standard  
•
interrupting capacity circuit breaker is  
available. The circuit breaker is  
mechanically interlocked to disconnect  
line power from the starter when the  
starter door is open.  
High Interrupting Capacity Circuit  
•
Breaker — A high interrupting capacity  
circuit breaker is available. This breaker  
is also interlocked to disconnect line  
power from the starter when the  
starter door is open.  
Circuit Breaker with Ground Fault —  
Ground Fault protection is available  
with either standard or high  
Integral Bypass Contactors  
SCR’s  
When the SCR’s are fully “phased on,”  
the integral bypass contactors are  
energized. The current flow is transferred  
from the power pole to the contactors.  
This reduces the energy loss associated  
with the power pole, which is otherwise  
about one watt per amp per phase.  
An SCR will conduct current in one  
direction only when a control signal  
(gate signal) is applied. Because the  
solid-state starter is for use on AC  
(alternating current), two SCR’s per  
phase are connected in parallel,  
opposing each other so that current may  
flow in both directions. For three- phase  
loads, a full six-SCR configuration is  
used. The connection is shown in Figure  
O-3.  
•
interrupting capacity circuit breakers.  
An indicating light is provided to  
indicate if a ground fault has occurred.  
When the starter is given the stop  
command, the bypass contactors are de-  
energized, which transfers the current  
flow from the contactors back to the  
power poles. Two-hundred fifty  
milliseconds later, the SCR’s are turned  
off, and the current flow is stopped.  
Current Limiting Circuit Breaker — A  
•
standard circuit breaker incorporating  
the current limiters with fuse links is  
available. A fault current in excess of  
the circuit breaker capacity will blow  
the fuse links and interrupt the fault  
current. The circuit breaker cannot be  
reset until the blown current limiters  
are replaced.  
During starting, control of current or  
acceleration time is achieved by gating  
the SCR on at different times within the  
half-cycle. The gate pulses are originally  
applied late in the half-cycle and then  
gradually applied sooner in the half-  
cycle. If the gate pulse is applied late in  
the cycle, only a small increment of the  
wave form is passed through, and the  
output is low.  
Ground fault detection and protection  
(available only with circuit breaker  
options)  
•
Figure O-3 — Six-SCR Configuration  
Figure O-4 — Wave Forms  
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Adaptive  
Frequency Drives  
Figure O-4 — CVHE500 Part Load Efficiencies with/without AFD  
Benefits  
Trane Adaptive Frequency drives*  
provide motor control, but they are  
much more than just starters. They also  
control the operating speed of the chiller  
compressor motor by regulating output  
voltage in proportion to output  
frequency. Varying the speed of the  
compressor motor can translate into  
significant energy cost savings.  
Reliable, Optimized Compressor  
Efficiency for Energy Savings  
Conventional chillers use inlet vanes to  
provide stable operation at part-load  
conditions. Capacity is reduced by  
closing the vanes while maintaining a  
constant motor speed. The drive can be  
used to significantly reduce power  
consumption by reducing motor speed  
at low load conditions. Trane patented  
AFD Adaptive Control™ logic safely  
allows inlet guide vane and speed  
control combinations that optimize part-  
load performance.  
To Avoid Mechanical Stress  
Controlled “soft” start with linear  
acceleration results in limited starting  
current to eliminate motor stress, reduce  
power line disturbance and provide a  
lower power demand on start. Reduced  
motor speed as a result of reduced  
chiller load means less current drawn,  
less heat generated, increased motor  
winding life. This translates into longer  
time between compressor maintenance  
and less downtime throughout the life of  
the machine.  
Application  
Certain system characteristics favor  
installation of an AFD because of energy  
cost savings and shorter payback.  
Among them are:  
A large number of part-load operating  
hours annually  
Figure O-4, based on a CVHE500, 500-ton  
load at standard ARI conditions, shows  
that major kW savings occur at part-load  
conditions, typically below 90 percent  
load.  
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Unit  
Options  
Adaptive  
Frequency Drives  
Condenser water temperature relief of  
chilled water reset  
Inverter — Converts the DC voltage  
•
into a sinusoidal synthesized output  
AC voltage. This synthesized output  
controls both the voltage and  
frequency which is applied to the  
motor.  
Compressor lift reduction is required for  
a chiller application, both to provide  
stable chiller operation at part-loads and  
to achieve greater energy savings.  
Intelligent control to reduce condenser  
water temperature, or chiller water reset  
strategies are key to AFD savings in  
chiller applications.  
A fourth element of AFD design is the  
microprocessor control logic which is  
the intelligence for the power section. It  
also includes all feedback sensors  
required for stability in the system and  
any required shutdown due to a fault.  
High kW Charges  
Electric utility bills normally include both  
demand and energy components. The  
demand or kW portion is established by  
usage during utility peak hours, by  
individual peak usage or a combination.  
This portion may or may not be  
Soft Start: Inrush Current and Torque  
Trane AFD’s are programmed to start the  
compressor motor from low frequency  
and low voltage. The motor is brought  
up to speed by increasing both  
frequency and voltage at the same ratio.  
Thus current and torque are much lower  
during start-up and acceleration than the  
high current, high torque associated with  
across-the-line or even reduced voltage  
starters.  
influenced by installation of an AFD. But  
the energy or kWh portion will almost  
certainly be reduced because of the  
improved efficiency of the chiller plant  
during part-load conditions throughout  
the year. The greater the kWh charge, the  
shorter the payback.  
Note that the actual torque developed by  
the AFD is the total of the torque  
required by the load and the accelerating  
torque. The AFD is rated by output  
current and is limited to a maximum of  
100 percent continuous RLA through the  
chiller control (UCP2). A 100 percent  
output current capability results in 100  
percent torque generated by the motor.  
In other words, the drive regulates  
output voltage in proportion to output  
frequency to maintain ideal motor flux  
and constant torque producing  
Operation  
The Trane AFD controls the speed of the  
chiller compressor by regulating the  
output voltage in proportion to the  
output frequency to provide a nominally  
constant rate of voltage to frequency as  
required by the characteristics of the  
compressor motor. Motor speed is  
proportional to this applied frequency.  
The Trane AFD is a voltage source, pulse-  
width modulated (PWM) design. It  
consists of three basic power sections:  
Converter — Semi-conductor bridge  
capability.  
•
rectifier takes incoming AC power and  
converts it to a fixed voltage DC bus.  
DC bus filter — The converted DC bus  
•
voltage contains a significant amount  
of ripple. The DC bus filter smooths the  
voltage ripple from the converter with  
capacitors and a DC link reactor to  
supply a fixed constant voltage to the  
inverter section. It also minimizes the  
electrical harmonics generated by the  
drive back to the distribution system.  
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Unit  
Options  
Free Cooling  
The suitability of free cooling for any  
particular installation depends upon a  
number of factors. The availability of  
low temperature condensing water, the  
quality of the outside air, the type of  
airside system, the temperature and  
humidity control requirements, and the  
cost of electricity all have a direct impact  
on the decision to use a free cooling  
chiller.  
Free Cooling Operation Schematic  
Free Cooling Allows  
Reduced Operating Costs  
Consider a CenTraVac™ chiller option that  
can provide up to 45 percent of the  
nominal chiller capacity — without  
operating the compressor. Think of the  
significant energy and cost savings  
possible in many applications. This  
option is available on all Trane chillers,  
factory installed.  
The use of CenTraVac free cooling  
depends on the availability of cold  
condenser water from a cooling tower,  
river, lake, or pond. As a general rule of  
thumb, locations which have a  
Free cooling operation is based on the  
principle that refrigerant migrates to the  
area of lowest temperature. When  
condenser water is available at  
temperatures lower than the required  
leaving chilled water temperature  
(typically 50 to 55°F), the unit control  
panel starts the free cooling cycle  
automatically.  
substantial number of days with  
ambient temperatures below 45°F wet  
bulb or more than 4000 degree-days per  
year are well suited to free cooling  
operation. A cooling tower usually must  
be winterized for off-season operation  
and the minimum sump temperature is  
limited by some cooling tower  
Reliability  
Two simple valves are the only moving  
parts.  
When the free cooling cycle can no  
longer provide sufficient capacity to meet  
cooling requirements, mechanical  
cooling is restarted automatically by the  
unit control panel.  
Single-Source Responsibility  
Free cooling is Trane engineered,  
manufactured and installed.  
manufacturers. Cooling tower  
manufacturers should be consulted for  
recommendations on low temperature  
operation. With river, lake or pond  
supply, condenser water temperatures  
down to freezing levels are possible.  
Areas which have badly fouled air may  
be more conducive to free cooling  
operation than the use of an outside air  
economizer.  
Ease of Operation  
Changeover on free cooling by single  
switch control.  
For example, a building with a high  
internal cooling load is located in a  
climate with cold winters. It is possible to  
cool the building exclusively with free  
cooling three to six months of the year!  
Free cooling payback can easily be less  
than a year.  
Ease of Installation  
Completely factory-installed and leak-  
tested components. All valve operators  
and controls are factory wired.  
Application  
Free cooling is completely factory  
installed and requires no more floor  
space or piping than the standard  
CenTraVac chiller (unlike plate frame heat  
exchangers).  
Airside systems which both heat and  
cool the air can often effectively use a  
free cooling chiller. Dual-duct, multizone,  
and reheat systems fall into this general  
category. As the outside temperature  
begins to fall, the cool outside air  
Modern buildings often require some  
form of year-round cooling to handle  
interior zones, solar loads, or computer  
loads. As the outside air temperature  
decreases below the inside air design  
temperature, it is often possible to use  
an outside air economizer to satisfy the  
cooling requirements. There are a  
number of instances, however, where  
CenTraVac free cooling offers a number  
of advantages over the use of an outside  
air economizer. It is possible for the free  
cooling chiller to satisfy the cooling load  
for many hours, days, or months during  
the fall, winter, or spring seasons without  
operation of the compressor motor. This  
method of satisfying the cooling  
Benefits  
satisfies the cooling requirements  
The Trane patented free cooling  
accessory for Trane CenTraVac™ chillers  
adapts the basic chiller so it may  
function as a simple heat exchanger  
using refrigerant as the working fluid.  
When condenser water is available at  
temperatures lower than the desired  
chilled liquid temperature, free cooling  
can provide up to 45 percent of nominal  
chiller capacity without operation of the  
compressor. This feature may result in  
substantial energy cost savings on many  
installations.  
(through an outside air economizer). As  
the outdoor air temperature becomes  
very low, the outdoor air may need to be  
heated in order to maintain the design  
supply air temperature when it is mixed  
with return air. This “heating penalty”  
can be eliminated by using CenTraVac  
free cooling. Warm chilled water  
temperatures provided by the free  
cooling chiller would allow a warmer air  
temperature off the chilled water coils,  
eliminating the heating energy required  
by using only an outside air economizer.  
With today’s high cost electricity in most  
areas of the country, this heating penalty  
can be very significant.  
requirement can result in significant total  
energy savings over other types of  
systems. The savings available are most  
easily determined through the use of a  
computer energy analysis and economic  
program, such as TRACE™ (Trane Air  
Conditioning and Economics).  
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Options  
Free Cooling  
Figure O-5 — Compressor Operation  
Temperature and humidity control  
requirements are important  
considerations when evaluating the use  
of CenTraVac free cooling. Low  
temperature outside air (from the  
outside air economizer) often requires a  
large amount of energy for  
humidification purposes. Free cooling  
operation helps to reduce these  
humidification costs on many  
applications.  
condenses and flows by gravity back to  
the evaporator. This automatic  
refrigeration cycle is sustained as long as  
a temperature difference exists between  
the condenser water and evaporator  
water.  
Schematic  
The difference in temperature between  
the condenser and evaporator  
determines the rate of refrigerant flow  
between the two shells and hence the  
free cooling capacity.  
It is important to note that those  
If the system load becomes greater than  
the free cooling capacity either the  
operator manually stops free cooling, a  
binary input from a customer-supplied  
system disables free cooling or the CPM  
can automatically perform this function.  
The gas and liquid valves close and the  
compressor starts. Refrigerant gas is  
drawn out of the evaporator by the  
compressor, compressed and introduced  
into the condenser. Most of the  
condensed liquid first takes the path of  
least resistance by flowing into the  
storage tank which is vented to the high  
pressure economizer sump by a small  
bleed line. When the storage tank is  
filled, liquid refrigerant must flow  
through the bleed line restriction. The  
pressure drop through the bleed line is  
greater than that associated with the  
orifice flow control device, hence liquid  
refrigerant flows normally from the  
condenser through the orifice system  
and into the economizer.  
applications which require extremely  
precise humidity control typically cannot  
tolerate warmer than design chilled  
water temperatures. Therefore, since  
free cooling chillers normally deliver  
warmer than design chilled water  
temperatures, free cooling operation is  
usually not applicable with systems  
which require precise humidity control.  
Figure O-6 — Free Cooling Operation  
Schematic  
Also, free cooling is generally not used in  
conjunction with heat recovery systems,  
since mechanical cooling must be used  
to recover heat that will be used  
elsewhere in the building for  
simultaneous heating.  
Operation  
Free cooling operates on the principle  
that refrigerant flows to the area of  
lowest temperature in the system. The  
Tracer™ system/Chiller Plant Manager  
(CPM) can be used for automatic free  
cooling control. When condenser water  
is available at a temperature lower than  
the required leaving chilled water  
temperature, the CPM starts the free  
cooling cycle. If the load cannot be  
satisfied with free cooling, the CPM  
or a customer supplied system can  
automatically switch to the powered  
cooling mode. If desired, the chiller  
can be manually switched to the free  
cooling mode at the unit control panel.  
Upon changeover to free cooling, the  
shutoff valves in the liquid and gas lines  
are opened and a lockout circuit  
The free cooling accessory consists of  
the following factory-installed or  
supplied components:  
A refrigerant gas line, including an  
•
electrically actuated shutoff valve,  
installed between the evaporator and  
condenser.  
A valved liquid return line including an  
•
electrically activated shutoff valve,  
between the condenser sump and  
evaporator.  
A liquid refrigerant storage vessel.  
•
prevents compressor energization.  
Liquid refrigerant drains by gravity from  
the storage tank into the evaporator,  
flooding the tube bundle. Since the  
refrigerant temperature and pressure  
will be higher in the evaporator than in  
the condenser, due to the water  
Added refrigerant charge.  
•
Manual free cooling controls on the  
•
unit control panel.  
For specific information on free cooling  
applications, contact the local Trane sales  
office.  
temperature difference, the refrigerant  
gas boiled off in the evaporator will flow  
to the condenser. The gas then  
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Auxiliary  
Condenser  
System  
Options  
Benefits  
Auxiliary Condenser  
The Trane auxiliary condenser provides  
economical heat recovery for  
applications with small heating demand.  
It’s well-suited to preheat applications  
including domestic hot water, boiler  
makeup water and swimming pools.  
Simplicity  
No temperature controls are required.  
Auxiliary condensers are factory-  
mounted and tested.  
Flexibility  
Two auxiliary condenser sizes are  
available — standard and large. Either  
auxiliary condenser can be applied to  
any size CenTraVac™.  
The Trane auxiliary condenser option  
consists of a separate condenser  
connected in parallel with the standard  
condenser to provide simple heat  
recovery capability for applications  
where full heat recovery or high heating  
water temperatures are not required.  
Heat which normally would be rejected  
to the regular condenser water is picked  
up in the auxiliary condenser before the  
water enters the hot water heating  
system. Typical uses for this water  
include domestic water preheat, boiler  
makeup water preheat, and reheat air  
conditioning systems, as opposed to  
traditional heat recovery applications  
where higher temperature water is used  
to satisfy a building heating load,  
provide full heat input for domestic hot  
water, or provide the typically larger flow  
rates of hot water for process  
Safe  
Because the auxiliary condenser is a  
separate condenser, there is no  
possibility of cross contamination  
between the cooling tower water and the  
auxiliary condenser water circuits.  
Efficient  
Use of the auxiliary condenser option  
actually increases the chiller’s efficiency  
by increasing condenser heat transfer  
surface area and lowering the pressure  
differential the compressor must  
generate.  
Decreased life cycle operating costs  
result through use of the auxiliary  
condenser option because heat, which  
normally would be rejected by the  
cooling tower circuit, is now used for  
building heating requirements.  
applications.  
The auxiliary condenser not only  
captures energy otherwise lost, it also  
increases chiller efficiency.  
Application  
A simultaneous demand for heating and  
cooling is necessary to apply any heat  
recovery system. Common uses for  
heated water from an auxiliary  
Auxiliary condensers are available in two  
sizes: standard and large. Because the  
auxiliary condenser is a separate  
condenser, there is no cross  
contamination between the cooling  
tower water and the heat recovery water  
circuits.  
condenser include domestic water  
preheat, reheat air conditioning systems,  
and boiler makeup water. Building use is  
not limited to the traditional heat  
recovery candidates. Schools, hospitals,  
office buildings, and hotels have all  
proved to be excellent applications for  
the auxiliary condenser option.  
No temperature controls are required.  
Auxiliary condensers are factory  
mounted and tested.  
20  
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System  
Options  
Auxiliary  
Condenser (Cont.)  
heating water temperature, and flow rate  
will allow. All remaining heat will  
automatically be rejected through the  
standard condenser to the atmosphere  
through the cooling tower. No controls  
are needed to balance heat rejection in  
the two condensers.  
Controls  
The auxiliary condenser was designed  
for simplicity of operation. Machine load,  
water flow rate, and temperature  
determine the amount of heat recovered.  
There are no controls needed for heating  
water temperature because no attempt  
is made to maintain a specific hot water  
temperature in or out of the auxiliary  
condenser.  
Good system design will include a  
heated water bypass to ensure that  
water does not circulate through the  
auxiliary condenser when the chiller is  
de-energized. There are several ways to  
bypass the auxiliary condenser. When  
the hot water system is installed as  
shown in the figure below, the bypass is  
automatic if the heating water pump is  
interlocked with the chiller compressor  
motor.  
Operation  
The auxiliary condenser is a factory-  
mounted, separate, shell and tube heat  
exchanger available on water-cooled  
CenTraVac chillers.  
Because hot refrigerant gas always  
migrates to the area of lowest  
temperature, auxiliary condenser  
operation is simple. As hot gas leaves  
the compressor, it is free to flow to the  
auxiliary condenser or the standard  
condenser. Since water entering the  
auxiliary condenser is normally colder  
than that entering the standard  
condenser, the auxiliary condenser will  
have a lower bundle temperature and  
will attract the refrigerant gas. The  
auxiliary condenser will recover as much  
heat as the machine cooling load,  
Another bypass arrangement is to install  
a diverting valve. When interlocked with  
the compressor motor, this valve diverts  
the heating water flow to the  
conventional heating system whenever  
the chiller is not operating. These are  
only examples of the many ways of  
accomplishing a bypass.  
Contact your local Trane sales office for  
further specific information.  
Table O-1 — Auxiliary Condenser Flow Limits and Connection Sizes  
Auxiliary  
Condenser  
Bundle  
Size  
Standard  
Two Pass  
Smooth Bore  
Inter Enhanced  
Connection  
Minimum  
Maximum  
Gpm  
Minimum  
Gpm  
70  
Maximum  
Gpm  
Size  
(In)  
5
Gpm  
74  
276  
258  
Large  
121  
453  
115  
423  
5
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System  
Options  
Ice Storage  
The ice storage system is operated in six  
different modes: each optimized for the  
utility cost of the hour.  
selected for efficient production of  
Ice Storage Provides  
chilled fluid at nominal comfort cooling  
conditions. The ability of Trane chillers to  
serve “double duty” in ice production  
and comfort cooling greatly reduces the  
capital cost of ice storage systems.  
Reduced Electrical Demand  
Ice storage is the hottest thing in cooling  
today. It has been accepted by building  
owners and tenants who are concerned  
about utility costs.  
1 Provide comfort cooling with chiller  
2 Provide comfort cooling with ice  
3 Provide comfort cooling with ice and  
chiller  
A glycol solution is used to transfer heat  
from the ice storage tanks to the  
An ice storage system uses a standard  
chiller to make ice at night when utilities  
charge less for electricity. The ice  
supplements or even replaces  
mechanical cooling during the day when  
utility rates are at their highest. This  
reduced need for cooling results in big  
utility cost savings.  
centrifugal chiller and from the cooling  
coils to either the chiller or ice storage  
tanks. The use of a freeze protected  
solution eliminates the design time, field  
construction cost, large refrigerant  
charges, and leaks associated with ice  
plants. Ice is produced by circulating 22-  
24°F glycol through modular insulated  
ice storage tanks. Each tank contains a  
heat exchanger constructed of  
polyethylene tubing. Water in each tank  
is completely frozen with no need for  
agitation. The problems of ice bridging  
and air pumps are eliminated.  
4 Freeze ice storage  
5 Freeze ice storage when comfort  
cooling is required  
6 Off  
Tracer optimization software controls  
operation of the required equipment and  
accessories to easily transition from one  
mode of operation to another. For  
example:  
Another advantage of ice storage is  
standby cooling capacity. If the chiller is  
unable to operate, one or two days of ice  
may still be available to provide cooling.  
In that time the chiller can be repaired  
before building occupants feel any loss  
of comfort.  
Even with ice storage systems there are  
numerous hours when ice is neither  
produced or consumed, but saved. In  
this mode the chiller is the sole source of  
cooling. For example, to cool the  
building after all ice is produced but  
before high electrical demand charges  
take effect, Tracer sets the centrifugal  
chiller leaving fluid setpoint to its most  
efficient setting and starts the chiller,  
chiller pump, and load pump.  
When cooling is required, ice chilled  
glycol is pumped from the ice storage  
tanks directly to the cooling coils. No  
expensive heat exchanger is required.  
The glycol loop is a sealed system,  
eliminating expensive annual chemical  
treatment costs. The centrifugal chiller is  
also available for comfort cooling duty at  
nominal cooling conditions and  
efficiencies. The modular concept of  
glycol ice storage systems and the  
proven simplicity of Trane Tracer™  
controls allow the successful blend of  
reliability and energy saving  
The Trane CenTraVac chiller is uniquely  
suited to low temperature applications  
like ice storage because it provides  
multiple stages of compression.  
Competitive chillers provide only one  
stage. This allows the CenTraVac chiller  
to produce ice efficiently, with less stress  
on the machine.  
When electrical demand is high, the ice  
pump is started and the chiller is either  
demand limited or shut down  
completely. Tracer controls have the  
intelligence to optimally balance the  
contribution of ice and chiller in meeting  
the cooling load.  
Simple and smart control strategies are  
another advantage the CenTraVac chiller  
has for ice storage applications. Trane  
Tracer™ building management systems  
can actually anticipate how much ice  
needs to be made at night and operate  
the system accordingly. The controls are  
integrated right into the chiller. Two  
wires and preprogrammed software  
dramatically reduce field installation cost  
and complex programming.  
performance in any ice storage  
application.  
The capacity of the chiller plant is  
extended by operating the chiller and ice  
in tandem. Tracer rations the ice,  
augmenting chiller capacity while  
reducing cooling costs.  
Ice Storage Demand Cost Savings  
Trane centrifugal chillers are well suited  
for ice production. The unique multi-  
stage compressor design allows the  
lower suction temperatures required to  
produce ice and the higher chiller  
efficiencies attributed to centrifugal  
chillers. Trane three stage and two stage  
centrifugal chillers produce ice by  
supplying ice storage vessels with a  
constant supply of 22 to 24°F glycol.  
Centrifugal chillers selected for these  
lower leaving fluid temperatures are also  
When ice is produced, Tracer will lower  
the centrifugal chiller leaving fluid  
setpoint and start the chiller, chiller and  
ice pumps, and other accessories. Any  
incidental loads that persists while  
producing ice can be addressed by  
starting the load pump and drawing  
spent cooling fluid from the ice storage  
tanks.  
For specific information on ice storage  
applications, contact your local Trane  
sales office.  
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System  
Options  
Heat Recovery  
paid due to the inherent differences in  
operating cycles for heat recovery  
machines, but traditional machine  
design can add to that energy handicap.  
In the past, a heat recovery machine’s  
operating efficiency was normally  
penalized year- round by having the  
capability to produce high heating water  
temperatures. Impellers are selected to  
produce the maximum required  
Heat Recovery  
Use of the Heat Recovery CenTraVac™  
can significantly reduce the energy  
operating costs of many buildings by  
using heat which normally would be  
rejected to the atmosphere. Typical uses  
for this heat are perimeter zone heating,  
reheat air conditioning systems and any  
hot water requirements. Any building  
with a simultaneous heating and cooling  
load is a potential candidate.  
refrigerant pressure difference between  
the evaporator and condenser,  
Figure O-8. Usually, that meant the  
impeller diameters were determined by  
the heat recovery operating conditions.  
Most heating applications require water  
temperatures higher than the  
85°F to 95°F typically sent to the cooling  
tower. Therefore, most heat recovery  
chillers are required to produce higher  
leaving condenser water temperatures,  
and thus will not duplicate the energy  
efficiencies of cooling-only machines.  
Figure O-7 illustrates the typical  
operating cycles of a cooling-only  
machine and a heat recovery machine.  
The most noticeable differences are:  
During cooling-only operation, the  
condensing pressures and temperatures  
are normally lower than during the heat  
recovery operation. So, in essence, the  
impeller diameters were oversized. This  
would result in a compressor efficiency  
during cooling- only season which was  
lower than if the impellers had been  
selected for a cooling-only application.  
1 The pressure differential provided by  
the compressor is much greater for the  
heat recovery cycle.  
The multi-stage compressor and  
advanced impeller design on the  
CenTraVac™ chiller reduce this costly  
energy penalty. Neither the capacity nor  
the power consumption changes  
substantially as the heat recovery  
operating conditions divert from the  
cooling-only condition. The multi-stage  
compressor allows a closer match of  
impeller size to the operating condition.  
In addition, the computer designed  
impellers and crossover are designed to  
reduce losses as the kinetic energy of the  
refrigerant gas is converted to static  
pressure.  
2 The amount of heat rejected from the  
heat recovery condenser is greater  
than that which would be rejected in  
cooling-only operation.  
3 There is a decrease in the refrigeration  
effect. (RE) Higher condensing  
pressures increase the intermediate  
pressure in the economizer. Therefore,  
the liquid in the economizer has a  
higher enthalpy during the heat  
recovery mode than during standard  
chiller operation and the refrigeration  
effect is slightly decreased. Because of  
this decreased refrigeration effect, the  
compressor must pump more gas per  
ton of refrigeration.  
These advances make the Trane Heat  
Recovery CenTraVac™ chillers even more  
attractive now than in the past.  
The CenTraVac heat recovery chiller  
•
was designed for efficient operation  
with kW/ton efficiencies among the  
best in the industry for heat recovery  
chillers.  
The effect of this increased pressure  
differential and decreased refrigeration  
effect is a heat recovery machine which  
has a higher kW/ton energy  
consumption during heat recovery  
operation.  
The energy penalty paid in the past to  
•
operate a heat recovery machine in the  
cooling-only mode is essentially  
eliminated.  
Typical catalog kW/ton for heat recovery  
machines operating in the heat recovery  
mode range from .64 to .84 kW/ton  
compared to a range of .61 to .79 for a  
cooling-only machine. Not only can  
there be an energy consumption penalty  
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System  
Options  
Heat Recovery  
(Cont.)  
Figure O-7 — Typical Operating Cycles  
as the chiller load decreases and less  
heat is rejected to the condenser. As the  
mean heating water temperature drops,  
so does the refrigerant condensing  
temperature and pressure difference  
which the compressor is required to  
produce at part load. This increases the  
unloading range of the compressor.  
contamination. Refrigerant gas from the  
compressor flows into both condenser  
shells allowing heat rejection to one or  
both condenser water circuits.  
The reliability of the Heat Recovery  
CenTraVac chiller has been proven in  
installations around the world. This  
option is completely factory packaged.  
When the supply heating water  
temperature to the building system is  
maintained and the return heating water  
temperature to the condenser is allowed  
to float, the mean heating water  
temperature actually rises as the chiller  
load decreases and less heat is rejected  
to the condenser. As Figure  
O-8 illustrates, when the compressor  
unloads, the pressure difference that it  
must oppose to prevent surging remains  
essentially the same, while the  
compressor’s capability to handle the  
pressure difference decreases.  
Therefore, the unit’s capability to unload  
without the use of hot gas bypass is  
reduced.  
To further reduce the system energy  
requirements, the following design  
considerations should be incorporated  
into any heat recovery system.  
System Design Considerations  
Heating Water Temperatures and  
Control — It is always desirable to use as  
low a heating water temperature as the  
application allows. Experience has  
shown that a design heating water  
temperature of 105 to 110°F can satisfy  
most heating requirements. Lower  
heating water temperatures increase the  
chiller operating efficiency both in the  
heating mode and in the cooling mode.  
In general, the heat recovery power  
consumption will increase 7 to 14  
Simultaneous Heating and Cooling  
The Trane Heat Recovery CenTraVac™  
chiller is an excellent choice for  
applications requiring simultaneous  
heating and cooling. CenTraVac models  
save energy by recovering heat normally  
rejected to the atmosphere and putting  
that energy to use providing space  
heating, building hot water or process  
hot water. This heat is provided at a  
fraction of conventional heating systems  
cost. A heat recovery CenTraVac can  
provide 95 to 120°F hot water.  
Hot gas bypass artificially increases the  
load on the compressor (cfm of  
refrigerant gas) by diverting refrigerant  
gas from the condenser back to the  
compressor. Although hot gas bypass  
increases the unit’s power consumption  
by forcing the compressor to pump  
more refrigerant gas, it will increase the  
heat available to recover for those  
applications where significant heating  
loads remain as the cooling load  
decreases.  
percent for every 10°F increase in the  
design heating water temperature. A  
consideration which is just as important  
as the design heating water temperature  
is how that temperature is controlled. In  
most cases, the heating water  
temperature control should be designed  
to maintain the return heating water  
temperature. By allowing the supply  
water temperature to float, the mean  
water temperature in the system drops  
An advanced computer selection  
program chooses a heat recovery  
condenser to match your needs. Two  
separate condenser shells are used with  
the Heat Recovery CenTraVac chiller. The  
heating circuit and cooling tower circuit  
are separate, preventing cross  
Figure O-8 — Refrigerant Pressure Difference  
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System  
Options  
Chilled Water  
Reset  
Figure O-9 — Heating Water Control  
Chilled Water Reset — Chilled water  
reset is often a practical means of  
reducing energy consumption during  
periods of the year when heating loads  
are high but cooling loads are reduced.  
Resetting the chilled water temperature  
increases the evaporator refrigerant  
pressure. This increased evaporator  
pressure reduces the pressure  
differential the compressor must  
generate while in the heat recovery  
mode. A secondary benefit of chilled  
water reset is that it enables the chiller to  
produce higher heating water  
temperature than would normally be  
possible.  
Figure O-10 — Chilled Water Reset  
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Application  
Considerations  
CVHE, CVHG,  
CVHF  
For Applications Requiring  
CVHE 170-500 Tons (60 Hz)  
CVHG 450-1300 Tons (50 Hz)  
The Trane multi-stage CenTraVac chiller  
is built with a commitment to quality  
which has made it the world’s premier  
centrifugal chiller.  
CVHF 325 To 1750 Tons (60 Hz) For Applications Requiring  
The two-stage CenTraVac chiller, built  
1300-3500 Tons (60 Hz),  
with the same tradition and commitment  
Choose LHCV  
to quality.  
The LHCV chiller system is the modern  
•
Two-stage compressor for continued  
•
solution for large central plant  
superior efficiency over single stage  
applications. It offers significant first  
designs.  
cost and operating cost advantages  
compared to field-assembled very  
large chillers.  
Exceptionally quiet operation — lowest  
•
•
A multi-stage compressor for superior  
•
sound level in the industry.  
efficiency compared to single stage  
designs. Multi-stages also provide  
stable, surge-resistant operation.  
The Trane Integrated Comfort™ system  
(ICS) is the key to high performance for  
the LHCV system. Applications  
software takes advantage of Trane  
chiller and chiller plant expertise  
delivering sophisticated chiller plant  
sequencing capabilities in an easy to  
use prepackaged system.  
The LHCV extends the CenTraVac™  
chiller line from 1300 to 3000 tons. The  
hermetic, direct drive design delivers  
the quality and reliability you need and  
have come to expect from large  
chillers. The dependability is especially  
critical for the large central plants that  
the LHCV is ideally suited for.  
•
•
•
Patented single-stage economizer  
provides up to five percent efficiency  
increase and similar energy cost  
decrease.  
Exceptionally quiet operation — lowest  
sound levels in the industry.  
•
Patented two-stage economizer  
•
provides up to seven percent efficiency  
increase and similar energy cost  
decrease.  
The modular design concept of the  
LHCV chiller system paired with the  
chiller plant optimization capability of  
Trane Integrated Comfort systems  
(ICS) provides the flexibility you need  
to optimize your central chiller water  
plant design. This system  
configuration is ideally suited to deliver  
the highest performance for free  
cooling, heat recovery and combined  
energy source systems.  
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Application  
Considerations  
of factors such as load, leaving  
circuit ampacity. The minimum circuit  
ampacity is defined as the sum of two  
amperages: 125 percent of the  
Condenser Water Limitations  
evaporator temperature and component  
combinations. Start-up below this  
differential is possible as well, especially  
with UCP2 soft start features  
Trane CenTraVac™ chillers start and  
operate over a range of load conditions  
with controlled water temperatures.  
Reducing the condenser water  
temperature is an effective method of  
lowering the chiller power input.  
However, the effect of lowering the  
condenser water temperature may cause  
an increase in system power  
compressor motor Rated Load Amps  
(RLA), plus the Full Load Amps (FLA) of  
all remaining loads on the same circuit.  
For starter to motor wiring, there are no  
other remaining loads. For main power  
supply to the starter, there is a remaining  
load consisting of the 4 KVA control  
power transformer which supplies power  
to the controls, the oil pump motor, oil  
sump heater and the purge unit motor.  
Therefore, the remaining load FLA  
equals 4000 divided by the unit design  
voltage.  
Water Flow  
Today’s technology challenges ARI’s  
traditional design of three gpm per ton  
through the condenser. Reduced  
condenser flows are a simple and  
effective way to reduce both first and  
operating costs for the entire chiller plant.  
This design strategy will require more  
effort from the chiller. But pump and  
tower savings will typically offset any  
penalty. This is especially true when the  
plant is partially loaded or condenser  
relief is available.  
consumption.  
In many applications Trane CenTraVac  
chillers can start and operate without  
control of the condenser water  
temperature. However, for optimum  
system power consumption, and for any  
applications with multiple chillers,  
control of the condenser water circuit is  
recommended. Integrated control of the  
chillers, pumps and towers is easily  
accomplished with Trane’s UCP2 and/or  
Tracer system.  
As an example, calculate the minimum  
circuit ampacity of a machine which has  
a design RLA of 350 amps and is to be  
operated on a 460 volt power supply:  
In new systems, the benefits can include  
dramatic savings with:  
Size and cost for condenser lines and  
•
Minimum Circuit Ampacity =  
valves  
4000 VA  
Size and cost of the cooling tower.  
•
(125% x 350 Amps) +  
Water Treatment  
Size and cost of the water pumps.  
460 V  
= 437.5 Amps + 8.7 Amps  
= 446.2 Amps  
•
The use of untreated or improperly  
treated water in a chiller may result in  
scaling, erosion, corrosion, algae or  
slime. It is recommended that the  
services of a qualified water treatment  
specialist be used to determine what  
treatment, if any, is advisable. The Trane  
Company assumes no responsibility for  
the results of untreated, or improperly  
treated water.  
Pump energy (30 to 35% reduction).  
•
Tower fan energy (30 to 35% reduction).  
•
Replacement chiller plants can reap even  
greater benefits from low flow  
After the minimum circuit ampacity has  
been determined, the electrical engineer  
or contractor will refer to the appropriate  
conductor sizing table in the NEC to  
determine the exact conductors required.  
A typical table for 75°F conductors is  
included in the Trane submittal. The  
selection of conductors is based on a  
number of jobsite conditions (i.e. type of  
conductor, number of conductors, length  
of conductors, ambient temperature  
rating of conductors).  
condensers. Because the water lines and  
tower are already in place, reduced flows  
would offer a tremendous energy  
advantage. Theoretically, a 2 GPM/ton  
design applied to a system that originally  
used 3 GPM/ton would offer a 70%  
reduction in pump energy. At the same  
time, the original tower would require a  
nozzle change but would then be able to  
produce about two degrees colder  
Water Pumps  
Avoid specifying or using 3600 rpm  
condenser and chilled water pumps.  
Such pumps may operate with  
objectionable noises and vibrations. In  
addition, a low frequency beat may occur  
due to the slight difference in operating  
rpm between water pumps and  
CenTraVac motors. Where noise and  
vibration-free operation are important,  
The Trane Company encourages the use  
of 1750 rpm pumps.  
condenser water than before. These two  
benefits would again typically offset any  
extra effort required by the chiller.  
Branch-Circuit Short-Circuit and Ground  
Fault Protection  
Circuit breakers and fused disconnects  
should be sized by the electrical engineer  
or contractor in strict accordance with  
NEC Article 440-21 and in accordance  
with all local codes. This protection  
should be for motor type loads and  
should not be less than 150 percent of  
the compressor motor rated load amps  
(RLA).  
Contact your local Trane Sales Office for  
information regarding optimum  
condenser water temperatures and flow  
rates for a specific application.  
Chillers are designed to ARI conditions of  
85°F, but Trane CenTraVac chillers can  
operate to a 3 psig pressure differential  
between the condenser and evaporator  
at any steady state load without oil loss,  
oil return, motor cooling, refrigerant  
hang-up or purge problems. And this  
differential can equate to safe minimum  
entering condenser water temperatures  
at or below 55°F, dependent on a variety  
Electrical Information  
Minimum Circuit Ampacity  
To properly size field electrical wiring, the  
electrical engineer or contractor on a  
project needs to know the minimum  
circuit ampacity of the CenTraVac™  
machine. The National Electrical Code  
(NEC), in Article 440-33, defines the  
method of calculating the minimum  
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Selection  
Procedure  
Selection  
Performance  
Unit Performance With Fluid Media  
Other Than Water  
The CenTraVac™ centrifugal chiller  
product line provides more than 200,000  
individual unit selections over a capacity  
range of 170 through 3500 tons. Chiller  
selections and performance data can be  
obtained through the use of the  
CenTraVac chiller selection program  
available in local Trane sales offices. This  
program can provide a list of chiller  
selections optimized to closely match  
specific project requirements. Nominal  
data and physical data for typical  
compressor-evaporator- condenser  
combinations are given by product  
family.  
The CenTraVac computer selection  
program provides performance data for  
each chiller selection at the full load  
design point and part load operating  
points as required.  
CenTraVac chillers can be selected with a  
wide variety of media other than water.  
Typically used media include ethylene  
glycol or propylene glycol either in the  
evaporator, condenser or both. Chillers  
using media other than water are  
excluded from the ARI 550/590  
Certification Program, but are rated in  
accordance with ARI 550/590. Trane  
factory performance tests are only  
performed with water as the cooling and  
heat rejection media. For media other  
than water, contact the local Trane sales  
office for chiller selections and  
The Trane computer selection program  
is certified by ARI in accordance with ARI  
Standard 550/590. To assure that the  
specific chiller built for your project will  
meet the required performance, and to  
ensure a more troublefree start-up, it is  
recommended that the chiller be  
performance tested.  
The CenTraVac computer selection  
program has the flexibility to select  
chillers for excessive field fouling  
allowances.  
information regarding factory  
performance testing.  
Trane Model Number  
The Trane model number defines a Trane  
CenTraVac with its particular component  
combination. These components along  
with the project design conditions are  
required to determine chiller  
Flow Rate Limits  
Fouling Factors  
ARI Standard 550/590 includes a  
definition of clean tube fouling.  
Recommended field fouling allowances  
have not changed on a relative basis; the  
standard fouling adjustment is a 0.0001  
increment from 0.0000 “clean” on the  
evaporator and 0.00025 increment from  
0.0000 “clean” on the condenser.  
Flow rate limits for all pass combinations  
for evaporators and condensers are  
tabulated in the data section for the  
appropriate chiller family. For  
applications outside of these limits,  
contact your local Trane office.  
performance from the CenTraVac  
computer selection program:  
Compressor size and voltage  
•
Evaporator bundle size, bundle length,  
•
and number of water passes  
Condenser bundle size, bundle length,  
•
•
and number of water passes  
Chiller specifications should be  
developed using the most current  
standard fouling factors.  
Leaving chilled water temperature,  
evaporator water flow rate,  
temperature drop through the chiller  
It should be noted that changing the  
number of water passes or water flow  
rates may significantly alter the  
Entering condenser water temperature,  
•
condenser water flow rate, and  
temperature rise through the  
condenser  
performance of a particular chiller.  
To obtain the maximum benefit from the  
wide range of selections available,  
designers are encouraged to develop  
performance specifications and use the  
computer selection program to optimize  
their selections. This will allow the  
selection of the particular compressor-  
evaporator-condenser combination  
which most closely meets the job  
requirements. All selections should be  
made by using the computer selection  
program.  
Water side fouling factors for the  
•
•
evaporator and condenser  
Refrigerant type for operating on  
HCFC-123.  
28  
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Selection  
Procedure  
Roughing-in Dimensions  
There are a number of variables that  
should be considered in developing an  
accurate chiller load profile to use for  
measuring how one machine compares  
with another machine at part load. The  
use of outdoor air economizers,  
Part Load Performance  
The dimensional drawings illustrate  
overall measurements of the chiller. The  
recommended space envelope indicates  
clearances required to easily service the  
CenTraVac chiller. A view of the unit is  
superimposed on this drawing with unit  
support feet shown.  
The CenTraVac chiller possesses  
excellent performance characteristics  
over its full range of operation. The  
multi-stage direct drive compressor  
enables stable and efficient operation  
over a wide range of capacities, virtually  
eliminating the need for energy wasting  
hot gas bypass typically found on single  
stage chillers.  
variations in chiller sequencing and  
chiller plant load optimization strategies  
should be considered. The use of a  
decoupled or primary/secondary water  
loop is generally acknowledged as the  
simplest, most efficient way to control  
multiple chiller water plants. This control  
strategy results in one chiller operating  
at a more fully loaded condition rather  
than multiple chillers operating at part  
load, which would require more  
All catalog dimensional drawings are  
subject to change. Current submittal  
drawings should be referred to for  
detailed dimensional information.  
Contact the local Trane sales office for  
submittal and template information.  
An in-depth examination of project-  
specific conditions and energy rate  
structures should be performed to  
appropriately evaluate total energy costs  
over a period of time. TRACE™, Trane’s  
unique energy analysis program, is  
particularly well suited for this type of  
analysis, as well as for economic  
evaluation of equipment and system  
alternatives.  
Evaporator and Condenser  
Data Tables  
Evaporator and condenser data is shown  
in the Performance Data section. Data  
includes minimum and maximum water  
flow limits and water connection sizes for  
all standard pass configurations and tube  
type. Pressure drops are calculated by  
the CenTraVac computer selection  
program.  
pumping energy.  
ARI Standard 550/590 provides chiller  
performance certification for the full load  
condition and the “NPLV” (non-standard  
part load value). The NPLV uses a  
generic weighted chiller load profile to  
simplify certification of part load  
performance data. Although these  
values are not necessarily a precise  
indicator of actual energy use, they do  
provide a valuable basis for comparison.  
Local utilities may offer substantial  
monetary rebates for centrifugal chillers  
with specific operating kW ratings.  
Contact your local utility representative  
or Trane sales office for further  
information.  
The electrical rate structure is a key  
component of an economic evaluation.  
Most power bills are now constituted of  
1/3 demand charge and 2/3 usage  
charge. The full load power  
consumption of the chiller plant is likely  
to set the kW peak and demand charge  
for the billing period. This places an  
increased emphasis on the need to keep  
the full load consumption of the chiller  
plant low.  
CTV-PRC007-EN  
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Evaporator  
Performance Flow Rates  
Data  
(English & SI Units)  
Minimum/Maximum Evaporator Flow Rates (GPM)  
Shell  
Size  
Bundle  
Size  
EVBS  
200  
230  
250  
280  
320  
350  
320  
360  
400  
450  
500  
550  
500  
560  
630  
710  
800  
890  
890  
980  
1080  
1220  
1420  
1610  
1760  
1900  
2100  
2300  
2500  
One Pass  
TECU  
Two Pass  
TECU  
Three Pass  
TECU  
Min / Max  
77 / 412  
86 / 463  
95 / 509  
SBCU  
IECU  
SBCU  
IECU  
Min / Max  
72 / 525  
83 / 606  
88 / 646  
SBCU  
Min / Max  
72 / 396  
81 / 444  
89 / 488  
IECU  
Min / Max  
48 / 350  
55 / 404  
59 / 431  
67 / 491  
76 / 559  
84 / 613  
EVSZ  
032S  
032S  
032S  
032S/L  
032S/L  
032S/L  
050S  
050S  
050S  
050S/L  
050S/L  
050S/L  
080S  
080S  
080S  
080S/L  
080S/L  
080S/L  
142M/L  
142M/L  
142M/L  
142M/L/E  
142M/L/E  
210L  
Min / Max  
216 / 1187  
242 / 1331  
267 / 1465  
304 / 1672  
340 / 1868  
— / —  
340 / 1868  
383 / 2105  
424 / 2332  
482 / 2652  
535 / 2941  
— / —  
535 / 2941  
602 / 3312  
676 / 3715  
758 / 4169  
861 / 4736  
— / —  
Min / Max  
230 / 1237  
258 / 1388  
284 / 1527  
324 / 1743  
362 / 1947  
— / —  
362 / 1947  
399 / 2194  
442 / 2431  
503 / 2764  
558 / 3066  
— / —  
558 / 3066  
628 / 3453  
704 / 3872  
790 / 4346  
898 / 4937  
— / —  
Min / Max  
143 / 1050  
165 / 1212  
177 / 1293  
201 / 1474  
229 / 1676  
251 / 1838  
232 / 1696  
254 / 1858  
284 / 2080  
322 / 2363  
361 / 2646  
397 / 2908  
361 / 2646  
400 / 2928  
452 / 3312  
517 / 3756  
576 / 4221  
642 / 4706  
645 / 4726  
716 / 5251  
807 / 5917  
895 / 6564  
1041 / 7634  
1146 / 8402  
1286 / 9432  
1421 / 10421  
Min / Max  
108 / 593  
121 / 666  
134 / 733  
152 / 836  
170 / 934  
— / —  
170 / 934  
192 / 1052  
212 / 1166  
241 / 1326  
268 / 1470  
— / —  
268 / 1470  
301 / 1656  
338 / 1857  
379 / 2084  
431 / 2368  
— / —  
432 / 2373  
483 / 2657  
538 / 2956  
604 / 3323  
673 / 3699  
659 / 3622  
736 / 4045  
817 / 4494  
901 / 4953  
974 / 5355  
Min / Max  
115 / 618  
129 / 694  
142 / 764  
162 / 871  
181 / 973  
— / —  
181 / 973  
200 / 1097  
221 / 1215  
252 / 1382  
279 / 1533  
— / —  
279 / 1533  
314 / 1726  
352 / 1936  
395 / 2173  
449 / 2469  
— / —  
450 / 2474  
504 / 2770  
561 / 3082  
630 / 3464  
701 / 3856  
687 / 3775  
767 / 4216  
852 / 4684  
939 / 5163  
1015 / 5583  
101 / 737  
115 / 838  
126 / 919  
116 / 848  
127 / 929  
142 / 1040  
161 / 1181  
181 / 1323  
198 / 1454  
181 / 1323  
200 / 1464  
226 / 1656  
259 / 1878  
288 / 2110  
321 / 2353  
323 / 2363  
358 / 2625  
404 / 2959  
448 / 3282  
521 / 3817  
573 / 4201  
643 / 4716  
711 / 5211  
755 / 5534  
N/A  
102 / 557  
114 / 623  
— / —  
114 / 623  
128 / 702  
142 / 777  
161 / 884  
178 / 980  
— / —  
178 / 980  
201 / 1104  
226 / 1238  
253 / 1390  
288 / 1579  
— / —  
288 / 1582  
322 / 1771  
358 / 1971  
403 / 2215  
449 / 2466  
440 / 2415  
490 / 2697  
545 / 2996  
601 / 3302  
650 / 3570  
715 / 3931  
108 / 581  
121 / 649  
— / —  
121 / 649  
133 / 731  
148 / 810  
108 / 921  
186 / 1022  
— / —  
186 / 1022  
210 / 1151  
235 / 1291  
264 / 1449  
300 / 1646  
— / —  
300 / 1649  
336 / 1847  
374 / 2054  
420 / 2309  
468 / 2571  
458 / 2517  
512 / 2811  
568 / 3123  
626 / 3442  
677 / 3722  
746 / 4098  
77 / 565  
85 / 619  
95 / 693  
108 / 788  
121 / 882  
132 / 969  
121 / 882  
133 / 976  
151 / 1104  
171 / 1252  
192 / 1407  
214 / 1569  
215 / 1575  
239 / 1750  
269 / 1972  
299 / 2188  
347 / 2545  
382 / 2801  
429 / 3144  
474 / 3474  
503 / 3689  
N/A  
863 / 4746  
966 / 5314  
900 / 4948  
1008 / 5540  
1075 / 5912 1121 / 6163  
1208 / 6645 1260 / 6927  
1345 / 7398 1402 / 7712  
1318 / 7244 1373 / 7551  
1471 / 8090 1534 / 8433  
1634 / 8987 1704 / 9369  
210L  
210L  
210L  
1802 / 9906 1878 / 10326 1509 / 11067  
250E  
250E  
1948 / 10710 2030 / 11165  
2145 / 11794 2236 / 12295  
N/A  
N/A  
1073 / 5897 1118 / 6147  
N/A  
N/A  
Note: The minimum evaporator water velocity is 1.5 ft/sec for IECU tubes and 2.0 ft/sec for all other tubes. For a variable evaporator water flow system, the minimum  
GPME is generally not applicable at full load.  
Minimum/Maximum Evaporator Flow Rates (Liters/Second)  
Shell  
Size  
Bundle  
Size  
EVBS  
200  
One Pass  
TECU  
Two Pass  
TECU  
Min / Max  
8 / 39  
Three Pass  
TECU  
Min / Max  
5 / 26  
SBCU  
Min / Max  
14 / 75  
IECU  
Min / Max  
9 / 66  
SBCU  
Min / Max  
7 / 37  
IECU  
Min / Max  
5 / 33  
SBCU  
Min / Max  
5 / 25  
IECU  
Min / Max  
3 / 22  
4 / 25  
4 / 27  
EVSZ  
032S  
Min / Max  
14 / 78  
032S  
032S  
230  
250  
16 / 84  
17 / 92  
16 / 88  
18 / 96  
11 / 76  
11 / 82  
8 / 42  
9 / 46  
8 / 44  
9 / 48  
5 / 38  
6 / 41  
6 / 28  
6 / 31  
6 / 29  
6 / 32  
032S/L  
032S/L  
032S/L  
050S  
050S  
050S  
050S/L  
050S/L  
050S/L  
080S  
080S  
080S  
080S/L  
080S/L  
080S/L  
142M/L  
142M/L  
142M/L  
142M/L/E  
142M/L/E  
210L  
280  
320  
350  
320  
360  
400  
450  
500  
550  
500  
560  
630  
710  
800  
890  
890  
980  
1080  
1220  
1420  
1610  
1760  
1900  
2100  
2300  
2500  
20 / 105  
22 / 118  
— / —  
22 / 118  
24 / 133  
27 / 147  
31 / 167  
34 / 186  
— / —  
34 / 186  
38 / 209  
43 / 234  
48 / 263  
54 / 299  
— / —  
55 / 299  
61 / 335  
68 / 373  
76 / 419  
85 / 467  
84 / 457  
86 / 510  
104 / 567  
114 / 625  
123 / 676  
136 / 744  
20 / 110  
22 / 123  
— / —  
22 / 123  
26 / 138  
28 / 153  
32 / 174  
36 / 193  
— / —  
36 / 193  
40 / 218  
45 / 244  
50 / 274  
57 / 311  
— / —  
57 / 312  
63 / 349  
71 / 389  
80 / 437  
89 / 487  
87 / 476  
97 / 532  
108 / 591  
119 / 651  
128 / 704  
142 / 776  
13 / 93  
10 / 53  
11 / 59  
— / —  
11 / 59  
12 / 66  
14 / 74  
16 / 84  
17 / 93  
— / —  
17 / 93  
19 / 104  
22 / 117  
24 / 131  
28 / 149  
— / —  
28 / 150  
31 / 168  
34 / 186  
38 / 210  
43 / 233  
42 / 228  
47 / 255  
52 / 283  
57 / 312  
62 / 338  
68 / 372  
10 / 55  
12 / 61  
— / —  
12 / 61  
13 / 69  
14 / 77  
16 / 87  
18 / 97  
— / —  
18 / 97  
20 / 109  
22 / 122  
25 / 137  
28 / 156  
— / —  
29 / 156  
32 / 175  
36 / 194  
40 / 218  
44 / 243  
44 / 238  
49 / 266  
54 / 296  
60 / 326  
64 / 352  
71 / 388  
7 / 47  
7 / 53  
8 / 58  
8 / 54  
8 / 59  
9 / 66  
7 / 35  
8 / 39  
— / —  
8 / 39  
8 / 44  
9 / 49  
7 / 37  
8 / 41  
— / —  
8 / 41  
4 / 31  
5 / 35  
6 / 39  
5 / 36  
6 / 39  
6 / 44  
7 / 50  
8 / 56  
9 / 61  
8 / 56  
9 / 62  
15 / 106  
16 / 116  
15 / 107  
16 / 117  
18 / 131  
22 / 149  
23 / 167  
25 / 183  
23 / 167  
25 / 185  
29 / 209  
33 / 237  
37 / 266  
41 / 297  
41 / 298  
45 / 331  
51 / 373  
57 / 414  
66 / 482  
73 / 530  
81 / 595  
90 / 657  
95 / 698  
N/A  
9 / 46  
10 / 51  
11 / 58  
12 / 64  
— / —  
10 / 75  
12 / 83  
13 / 92  
12 / 83  
13 / 92  
14 / 104  
16 / 118  
18 / 133  
20 / 148  
21 / 149  
23 / 166  
26 / 187  
28 / 207  
33 / 241  
36 / 265  
41 / 297  
45 / 329  
48 / 349  
N/A  
10 / 56  
12 / 62  
— / —  
12 / 62  
13 / 70  
14 / 78  
16 / 88  
18 / 100  
— / —  
18 / 100  
20 / 112  
23 / 124  
26 / 140  
28 / 156  
28 / 152  
31 / 170  
35 / 189  
38 / 208  
41 / 235  
46 / 248  
12 / 64  
14 / 73  
15 / 81  
17 / 91  
19 / 104  
— / —  
19 / 104  
22 / 116  
24 / 130  
27 / 146  
30 / 162  
29 / 159  
32 / 177  
36 / 197  
40 / 217  
43 / 235  
48 / 259  
10 / 70  
11 / 79  
12 / 89  
14 / 99  
14 / 99  
15 / 110  
17 / 124  
19 / 138  
22 / 161  
24 / 177  
27 / 198  
30 / 219  
32 / 233  
N/A  
210L  
210L  
210L  
250E  
250E  
N/A  
N/A  
N/A  
30  
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Condenser  
Flow Rates  
(English & SI Units)  
Performance  
Data  
Minimum/Maximum Condenser Flow Rates (GPM)  
Shell  
Size  
Bundle  
Size  
CDBS  
230  
250  
280  
320  
360  
400  
450  
500  
500  
560  
630  
710  
800  
Two Pass  
TECU  
Min / Max  
209 / 767  
234 / 857  
261 / 958  
SBCU  
Min / Max  
214 / 784  
239 / 877  
267 / 980  
IECU  
CDSZ  
032S  
032S/L  
032S/L  
032S/L  
050S  
050S/L  
050S/L  
050S/L  
080S  
080S  
080S/L  
080S/L  
080S/L  
142L  
Min / Max  
218 / 798  
245 / 899  
273 / 1000  
306 / 1121  
347 / 1272  
391 / 1434  
441 / 1616  
490 / 1797  
490 / 1797  
548 / 2010  
614 / 2252  
689 / 2525  
774 / 2838  
876 / 3211  
975 / 3575  
1091 / 3999  
1217 / 4463  
1407 / 5160  
1495 / 5483  
1655 / 6069  
1812 / 6645  
1964 / 7200  
N/A  
295 / 1083  
336 / 1233  
378 / 1388  
426 / 1563  
473 / 1733  
473 / 1733  
529 / 1940  
595 / 2182  
673 / 2466  
756 / 2770  
853 / 3126  
948 / 3477  
1060 / 3885  
1185 / 4344  
1335 / 4896  
1331 / 4881  
1473 / 5402  
1615 / 5923  
1760 / 6454  
1760 / 6454  
1935 / 7094  
2113 / 7749  
289 / 1059  
329 / 1205  
370 / 1357  
417 / 1528  
462 / 1695  
462 / 1695  
517 / 1896  
582 / 2133  
657 / 2411  
739 / 2708  
833 / 3056  
927 / 3399  
1036 / 3798  
1158 / 4246  
1305 / 4786  
1301 / 4771  
1440 / 5280  
1579 / 5790  
1721 / 6309  
1721 / 6309  
1891 / 6934  
2066 / 7575  
890  
142L  
142L  
142L  
142L  
210L  
210L  
210L  
210L  
250L  
250L  
980  
1080  
1220  
1420  
1610  
1760  
1900  
2100  
2100  
2300  
2500  
N/A  
N/A  
250L  
Note: The minimum/maximum condenser water velocity is 3 / 11 ft/sec.  
Minimum/Maximum Condenser Flow Rates (Liters/Second)  
Shell  
Size  
Bundle  
Size  
CDBS  
230  
Two Pass  
TECU  
SBCU  
Min / Max  
13 / 49  
IECU  
Min / Max  
14 / 50  
15 / 57  
17 / 63  
19 / 71  
22 / 80  
25 / 90  
28 / 102  
31 / 113  
31 / 113  
35 / 127  
39 / 142  
43 / 159  
49 / 179  
55 / 203  
62 / 226  
69 / 252  
77 / 282  
89 / 326  
94 / 346  
104 / 383  
114 / 419  
124 / 454  
N/A  
CDSZ  
032S  
032S/L  
032S/L  
032S/L  
050S  
050S/L  
050S/L  
050S/L  
080S  
080S  
080S/L  
080S/L  
080S/L  
142L  
Min / Max  
13 / 48  
250  
15 / 55  
15 / 54  
16 / 60  
18 / 67  
21 / 76  
23 / 86  
26 / 96  
280  
320  
360  
400  
450  
500  
500  
560  
630  
710  
800  
890  
980  
17 / 62  
19 / 68  
21 / 78  
24 / 88  
27 / 99  
30 / 109  
30 / 109  
33 / 122  
38 / 138  
42 / 156  
48 / 175  
54 / 197  
60 / 219  
67 / 245  
75 / 274  
84 / 309  
84 / 308  
93 / 341  
102 / 374  
111 / 407  
111 / 407  
122 / 447  
133 / 489  
29 / 107  
29 / 107  
33 / 120  
37 / 135  
41 / 152  
47 / 171  
53 / 193  
58 / 214  
65 / 240  
73 / 268  
82 / 302  
82 / 301  
91 / 333  
100 / 365  
109 / 398  
109 / 398  
119 / 437  
130 / 478  
142L  
142L  
142L  
142L  
210L  
210L  
210L  
210L  
250L  
250L  
250L  
1080  
1220  
1420  
1610  
1760  
1900  
2100  
2100  
2300  
2500  
N/A  
N/A  
CTV-PRC007-EN  
31  
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Jobsite  
Connections  
Figure J-1 — Electric Connections  
Supply and Motor Lead Wiring  
and Connections  
Copper conductors only should be  
connected to the compressor motor due  
to the possibility of galvanic corrosion as  
a result of moisture if aluminum  
conductors are used. Copper conductors  
are recommended for supply leads in the  
starter panel.  
Suggested starter panel line and load  
side lug sizes (when lugs are provided)  
are noted in the starter submittals. These  
submitted lug sizes should be carefully  
reviewed for compatibility with  
conductor sizes specified by the electrical  
engineer or contractor. If they are not  
compatible, the electrical engineer or  
contractor should specify the required  
lug sizes for the particular application.  
Ground lugs are provided in the motor  
terminal box and starter panel. The  
motor terminals are supplied with  
connection pads which will  
Shipment and Assembly  
All style hermetic CenTraVac™ units ship  
as a factory assembled, factory tested  
package, ready to rig into place on  
factory supplied isolation pads.  
accommodate bus bars or standard  
terminal lugs (crimp type  
recommended). Terminal lugs are field-  
supplied. These connection pads provide  
additional surface area to minimize  
improper electrical connections. Also, a  
3
/8-inch bolt is provided on all connection  
pads for mounting the lugs. Figure J-1  
illustrates the connection between the  
motor connection pads and the terminal  
lugs.  
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Controls  
an industrial/process system design,  
applications outside of the typical  
chilled water system design,  
the need for redundant machine  
protection, or the desire for more  
system information.  
With Enhanced Adaptive Control™ the  
controller does everything it can to  
avoid taking the chiller off line:  
— senses potential overload, freeze  
and condenser overpressure  
conditions  
— displays a warning message about  
the potential condition/safety trip  
— takes the following corrective action  
sequentially as the condition  
worsens:  
Advanced Controls  
•
Trane set the standard for unit  
microprocessor controls in 1985 with the  
first generation Unit control panel.  
Associated with this standard have been:  
Proportional Integral Derivative (PID)  
•
Equipment room refrigerant ppm  
control strategies which provide stable  
operation and higher accuracy for  
better performance;  
•
monitoring can be integrated into the  
control panel by employing a chiller  
mounted monitor or a wall mounted  
monitor.  
Adaptive Control™ to keep the chiller  
•
on line during adverse operating  
conditions and at the same time keep  
the chiller from a major failure;  
limits loading  
prevents further loading  
unloads until condition improves  
takes chiller off line  
UCP2 is modular in design which offers  
the ability to adapt to changes easily and  
effectively without adding prohibitive  
cost. To provide flexibility, the controller  
responds to a wide variety of needs for:  
Software based safeties that do not  
depend on electromechanical  
•
hardware — hardware that means  
questionable reliability and added cost;  
With the ability to detect surge, UCP2  
can call for corrective action to be  
taken to prevent a surge failure. If the  
system can respond within 15 minutes,  
the chiller will continue to operate until  
further corrective action can be taken.  
•
•
System Designs including equipment,  
operating conditions, and controls  
variations that are either existing  
or being considered for new  
installations.  
Operator interface that accesses chiller  
information and control adjustments at  
the front of the panel.  
•
Flexibility  
UCP2 adds more flexibility, more  
reliability and better system  
performance than even our most  
demanding customers expect.  
With the ability to function across a  
broader operating map, UCP2, in  
conjunction with the multiple-stage  
compressor, can provide safe  
operation when undesirable inputs to  
the chiller are encountered. This  
capability includes:  
Key to designing non-traditional systems  
is the ability to evaluate the cost and  
reliability issues of these systems in  
comparison to the more traditional  
systems. Trane recommends the use of  
C.D.S. Network Equipment Economics,  
the Trane Applications Manuals, and  
consultation with a Trane sales engineer  
for help in this analysis.  
The modular structure of UCP2 makes  
•
it possible for the designer to select the  
system controls and associated  
interfaces to Tracer™ (or other building  
automation systems) that are required  
for the chiller plant design. With this  
modular concept, capability can be  
added or upgraded at any time — with  
only temporary interruption of chilled  
water production.  
— cold condenser start  
— running with hot condenser water  
— low condenser water flow  
— hot evaporator start  
System Upgrades including the ability to  
accommodate changes in the chilled  
water system design or equipment room  
requirements or to accommodate new  
technologies that become available.  
— varying water/fluid loop flow  
operation  
— return from momentary power  
losses in less than one minute  
— smart restart inhibit designed to get  
the chiller back on line fast  
The operator can quickly program his  
•
Custom Report — so that only what is  
considered to be the most frequently  
accessed/important reports are  
available —at any time, right at the  
front of the panel.  
Reliability  
To most people, reliability means  
“dependable — giving the same result  
on successive trials.” However, to our  
customers it has come to mean “keep  
chilled water flowing.” In other words,  
“when I turn the switch on —cold water  
comes out.” In order to do this, the  
micro controller must be aware of what  
is happening in the system. But, more  
importantly, it must be able to make  
decisions and adjustments to keep the  
chiller running as long as possible even  
when non-standard conditions exist.  
Conditions such as bad power or bad  
water (flow, temperature, fouling) or  
system component failure.  
With more diagnostics and diagnostic  
history that are time/date stamped and  
with help messages, the operator or  
serviceman can take faster and more  
effective corrective action.  
•
•
With easy front panel programmability  
•
of Daily, Service Start-up and Machine  
Configuration settings and setpoints,  
the operator, serviceman, and system  
designer can customize the use of the  
micro controller to the unique  
conditions of the chiller plant —  
whether the purpose of chilled water is  
for comfort cooling or for process  
cooling.  
With the new stepper motor/inlet guide  
vane actuator, the same technology  
used in the machine tool industry  
offers highly reliable and precise inlet  
vane control.  
Systems Performance  
“Chilled Water System” encompasses  
many levels of control: Stand-alone  
Chiller, Chiller Plant, Applied System,  
Central Building Automation System.  
All data that is necessary for the safe  
•
operation and easy serviceability of the  
chiller is provided as standard on all  
CenTraVac™ chillers. Options are  
available that provide additional  
controls/data that are required for:  
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Chiller Plant  
Control  
Controls  
Building Automation and Chiller Plant  
Control  
For building automation and control of  
chilled water plants, Trane has  
morning pull down, thus preventing an  
overshoot of the actual capacity  
required. Unnecessary starts are  
avoided and the peak current demand  
is lowered.  
Remote communication through a  
•
modem: As an option, a modem can  
be connected to communicate the  
plant operation parameters through  
voice grade phone lines.  
developed the Tracer Summit™. It can  
control the operation of the complete  
installation: chillers, pumps, cooling  
towers, isolating valves, air handlers and  
terminal units. It is a pre-programmable,  
but, flexible control system module,  
configured according to the  
Communication capabilities: several  
•
The remote terminal is a PC workstation  
equipped with a modem and software to  
display the remote plant parameters.  
communication levels are provided:  
— local, through a PC workstation  
keyboard. Summit can be  
programmed to send messages to  
local or remote workstations and or  
a pager in the following cases:  
— Analog parameter exceeding a  
programmed value.  
requirements of the end user. Trane can  
undertake full responsibility for an  
optimized automation and energy  
management for the entire chiller plant.  
— Maintenance warning.  
— Component failure alarm.  
— Critical alarm messages. In this  
latter case, the message is  
The main functions are:  
Chiller sequencing: equalizes the  
•
number of running hours of the  
chillers. Different control strategies are  
available depending on the  
displayed until the operator  
acknowledges the receipt of the  
information. From the remote  
station it is also possible to access  
and modify the chiller plant’s  
control parameters.  
configuration of the installation.  
Control of the auxiliaries: includes  
•
input/output modules to control the  
operation of the various auxiliary  
equipments (water pumps, valves,  
cooling towers, etc.)  
Time of day scheduling: allows the end  
•
user to define the occupancy period,  
i.e. time of the day, holiday periods and  
exception schedules.  
Optimization of the start/stop time of  
•
the installation: based on the  
programmed schedule of occupancy  
and on the historical record of the  
behavior of the temperatures,  
calculates the optimal time of start and  
stop of the installation to get the best  
compromise between energy savings  
and comfort of the occupants.  
Soft loading: the soft loading function  
minimizes the number of chillers that  
are operated to satisfy the building  
•
34  
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Functions/  
Protections  
Controls  
Optimal Performance  
Chilled water reset (based on return  
Compressor  
•
Regardless of the system level being  
designed, the unit controls become  
critical not just in making every level  
operate reliably but in facilitating optimal  
performance. UCP2 provides more  
capability and more intelligence to make  
this operation/ optimization possible:  
water temperatures or ambient  
temperature or based on a 4-20 mA  
signal) for those installations where  
energy savings is more critical than  
maintaining design leaving chilled  
water temperature at part loads.  
Smart Shutdown Sequence  
High Compressor Discharge  
Temperature (optional)  
Surge Detection  
Extended Surge Protection  
Oil Temperature  
Applied Systems  
Chiller Level  
Low evaporator fluid temperature for  
•
•
Bearing Temperatures (optional)  
Factory mounted water temperature  
cold air/humidity control applications.  
•
•
sensors  
Variable fluid flow where evaporator  
Condenser  
Loss of flow  
Variable speed drive for those  
flow is modulated by a device outside  
the control of the chiller or the chiller  
plant.  
installations in which the chiller is  
operating at part load conditions a  
significant percentage of the time and  
where cold condenser water is  
available.  
High condenser pressure limit  
High pressure cutout  
Control Functions  
Constant Evaporator Leaving Fluid  
Temperature  
Evaporator  
Loss of flow  
Hot gas bypass for those process  
•
Low refrigerant temperature limit  
Low evaporator leaving fluid cutout  
installations where the chiller will need  
to respond quickly to sudden load  
increases.  
Current Limit/Demand Limit  
Condenser Limit  
Motor  
Current limit  
ASHRAE Guideline 3 Report  
•
Softloading  
incorporated into the Chiller Report  
and Printer Report. Guideline 3 aids  
operators in managing refrigerant  
assets.  
Hot Gas Bypass (optional)  
Current overload  
Leaving Condenser Water Temperature  
(programmable setting) heat pump only  
(optional)  
High motor winding temperatures  
High vacuum operation lockout  
Chiller Plant Level  
Momentary power loss, phase  
unbalance, phase loss, reverse rotation.  
Over/under voltage is optional  
Heat recovery — to take advantage of  
•
Ability to Control with Varying Water  
Loop Flow  
waste heat from the chiller for heating  
applications.  
Heat Recovery Temperatures (optional)  
Heat pump — for those applications in  
Smart short cycling protection  
•
which heating is the primary mission  
of the chiller and cooling is a waste  
product (requiring an endless source of  
heat such as a well or lake water).  
Constant Entering Fluid Temperature  
(programmable setting)  
Purge  
Tank full protection  
Variable Speed Drive (optional drive with  
adaptive tuning for safe operation and  
maximum efficiency)  
Low current detection  
Free-cooling — for use in those parts of  
•
Continuous or excessive pumpout  
detection  
the country where cold condenser  
water is available to eliminate the need  
to operate the compressor.  
Loss of Load for Sudden Load Loss  
(nuisance trip prevention)  
Excessive air leakage detection  
Variable flow — for applications where  
Monitored Points  
•
Note: capacity control can be  
either the condenser water or the  
system water flows must vary.  
Chiller information is available at the  
operator interface that can access a  
variety of reports: Custom, Chiller  
Refrigerant and Compressor.  
accomplished in several ways: entering  
or leaving evaporator fluid temperature,  
leaving condenser water temperature.  
Ice-making — for demand charge  
•
avoidance or for additional capacity  
needs and where no cooling  
requirements exist for considerable  
periods of time.  
Machine Protections  
Starter  
Compressor Contactor Failure Detection  
Custom Report: User Defined Custom  
Report (operator may choose up to 20  
points — from a list of over 100 choices).  
Low condenser gpm for chiller plant  
•
•
•
•
Chiller Report  
Status, Fluid Temperatures and  
Setpoints  
optimization.  
Solid-state starter heat sink (included  
with SSS)  
Cooling tower reset based on head  
pressure for tower optimization.  
ASHRAE Guideline 3 Report  
Low evaporator fluid temperature for  
•
•
Operating mode (i.e. run status)  
process applications.  
•
Setpoint source or reset source  
kW demand limiting for those  
installations where avoidance of  
demand charges is more critical than  
maintaining capacity.  
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Functions/  
Diagnostics  
Controls  
Readability  
Diagnostics  
Evaporator leaving fluid temperature  
setpoint  
Evaporator entering and leaving fluid  
temperatures  
Condenser water entering and  
leaving water temperature  
Current limit setpoint  
Evaporator flow and condenser flow  
(optional)  
Outdoor temperature (optional)  
Fluid or water pressure drops  
(optional) evaporator and condenser  
Active ice-making setpoint (if  
applicable)  
Active hot water setpoint (if  
applicable)  
•
•
•
LCD multi-language display that is  
•
Water and refrigerant temperatures out  
of range  
easy to read from a distance anywhere  
within a 60 degree angle.  
Loss of flows  
LCD backlight so that the display can  
•
be read in a variety of equipment room  
lighting.  
Sensor and switch faults  
Overload trips  
•
•
“Customizable” reports with  
understandable messages.  
Over/under voltage (if applicable)  
Surge/extended surge  
Compressor acceleration failure  
Transition failure  
•
•
•
•
•
Maintainability and Serviceability  
Keypad programmability — no  
•
•
•
setpoint potentiometers  
No batteries — configuration stored in  
Other drives faults  
nonvolatile memory  
Logically arranged report groups with  
Distribution faults  
report header and setpoint groups  
Auxiliary heat recovery temperature  
(if applicable)  
Oil pressures and temperatures out of  
range  
Selectable security  
•
Variable points updated every two  
•
Refrigerant Report  
Refrigerant Temperatures and  
Pressures  
seconds  
High condenser pressure cutout  
Low and high differential pressure  
Emergency stop  
Messages that direct user to problem  
•
source via a menu item  
ppm of refrigerant from multiple  
•
Application Flexibility  
points outside of machine  
Loss of communications to other  
sources  
Eight languages available  
•
•
Saturated condenser temperature  
•
Metric (SI) units or English  
•
Condenser pressure  
•
Remote display interface (optional)  
Microprocessor memory errors  
High motor winding temperature  
Excessive purge activity  
Saturated evaporator temperature  
•
Evaporator pressure  
For more information on the Trane  
centrifugal chiller unit control panel,  
please contact your local Trane sales  
engineer.  
•
Compressor discharge temperature  
•
(optional)  
Purge suction temperature  
Operator Interface  
•
Purge elapsed time  
The Trane CenTraVac chiller control  
panel, UCP2 is easy to use, understand,  
to access information, to read, to change  
setpoints, to diagnose problems, to  
maintain, and to reset after shutdown.  
•
Pumpout activity  
•
Compressor Report  
Starts and hours counters  
•
•Phase currents  
Phase voltages (optional)  
Convenience  
•
Oil temperature and flow  
Enunciation of all information is at the  
•
•
Motor winding temperature  
front panel display (including power,  
voltage, amps, purge, pressures,  
refrigerant monitoring, and number of  
starts data)  
•
Bearing temperatures (optional)  
•
Kilowatts/power factor (optional)  
•
Messages displayed using clear  
language  
•
36  
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Modules/Sequence  
of Operation  
Controls  
Modules  
from the chiller module the direction and  
distance to drive the inlet guide vanes  
and then generates the appropriate  
signals to operate the stepper motor.  
Conventional “relay logic” circuits have,  
been replaced by software and hardware  
imbedded in the CenTraVac™  
microprocessor controller. The functions  
of the microprocessor are divided into  
six standard modules. Optional modules  
are available for those applications that  
require additional control capability.  
Optional communication interface  
modules are available for alternative  
control sources. All modules  
The purge module provides control of  
the purge including all the inputs and  
outputs to control the purge, to optimize  
both purge and chiller efficiency, and to  
communicate purge diagnostics to the  
human interface.  
Before anything can begin, 115 volt  
(50 or 60 Hz) power is applied to the  
control panel. In that several control  
source devices may coexist, the operator  
determines which device has priority via  
the operator interface. All control settings  
at that control source are then in effect  
(i.e. active setpoints). A control source is  
the device that determines setpoints and  
whether the chiller is auto/off (such as  
local control panel, remote control  
display, 4-20 mA external device, Tracer™,  
generic BAS).  
communicate with each other on the  
interprocessor communication bus (IPC).  
All information is available and all  
setpoint/setup adjustments can be  
accomplished at the operator interface.  
An optional remote display permits the  
operator to monitor and operate the  
chiller from a remote location.  
The six standard modules consist of a  
chiller module, a circuit module, a starter  
module, a stepper module, a purge  
module and local display module.  
Sequence of Operation  
The chiller module is the master of the  
chiller. It communicates commands to  
other modules and collects data/status/  
diagnostic information from other  
modules over the IPC. The chiller  
module performs the leaving evaporator  
fluid temperature and limit control  
algorithms arbitrating capacity against  
any operating limit the chiller may find  
itself working against.  
For this sequence of operation it will be  
assumed that the control source has  
signaled the chiller to be in Automatic  
(i.e. when there is a load present, the  
chiller will turn on and when the load  
disappears, the chiller will turn off). It is  
also assumed that no diagnostic has  
occurred either prior to start-up or during  
run time and that no “special”  
applications exist.  
The circuit module is assigned inputs  
and outputs associated with the  
refrigerant and lubrication circuits.  
Power Off  
Power On  
Auto  
“Automatically Ready to Start  
Waiting for Need to Cool”  
“Restart Temporarily Prevented -  
Time Remaining [ : ]”  
The starter module provides control of  
the starter when starting, running and  
stopping the motor. It provides interface  
to and control of wye-delta, across the  
line, primary reactor, auto transformer,  
solid-state starters and Trane Adaptive  
Frequency™ drive. The starter module  
also provides protection to both the  
motor and the compressor in the form of  
running overload, phase reversal, phase  
loss, phase unbalance, momentary  
power loss and compressor surge. All  
diagnostics are communicated across  
the IPC to the human interface.  
Evaporator Pump On  
In Parallel: Restart Inhibit  
Prelubrication  
Condenser Flow Established  
Start  
“Establishing Condenser Flow  
and Oil Pressure”  
Run: Normal  
“Starting Compressor”  
“Running Normal” or  
Softloading  
“Softloading” or  
Evaporator Limit  
Condenser Limit  
Current/Demand Limit  
Unload  
“Running - Capacity Limited by  
Low Evaporator Temperature” or  
“Running - Capacity Limited by  
High Condenser Pressure”  
“Machine is Preparing to Shutdown”  
“Operator Initiated Stop -  
Press Auto to Restart”  
Stop  
In Parallel: Close Inlet Guide Vanes  
The stepper module is designed to drive  
the stepper motor inlet guide vane  
actuator and other flow control devices  
within a system. This module receives  
Run Compressor  
“Post Lubricating -  
Time Remaining [ : ]  
“Automatically Read to Start -  
Waiting for Need to Cool”  
Post Lube  
Auto  
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Controls  
A demand for chilled water is  
micro-controller identifies potential fail  
conditions. This allows the CenTraVac to  
continue safe operation even though  
some other part of the system is not  
operating properly.  
Therefore, even though operating in a  
controlled limit mode, the chiller may be  
opening or closing the guide vanes to  
keep the chiller on line as long as  
possible.  
determined by a temperature differential  
between the evaporator fluid setpoint  
and the supply fluid temperature.  
Start is inhibited and the condition  
enunciated if high condenser pressure or  
low oil temperature or high motor  
winding temperature is detected. Restart  
(defined as successive, unsuccessful  
attempts to start — also called short-  
cycling) Inhibit and the time remaining  
before restart can be attempted will be  
enunciated if this condition exists.  
“UNIT IS RUNNING CAPACITY LIMITED  
BY HIGH CURRENT;”  
When UCP2 detects that the chiller is  
entering surge the message “UNIT IS  
RUNNING SURGE DETECTED” is  
enunciated. (Optional surge protection  
energizes the head relief request relay. If  
corrective action is not taken and surge  
continues for 15 minutes, a latching  
shutdown will occur with a diagnostic  
message.)  
This condition means that a motor  
current limitation prevents further  
opening of the compressor inlet guide  
vanes in response to the temperature  
controller.  
“UNIT IS RUNNING CAPACITY LIMITED  
BY HIGH COND PRES;”  
The next step issues a command to start  
the condenser water pump, to confirm  
that the guide vanes are closed and to  
start the oil pump motor. When flow is  
proven, after confirmation that the guide  
vanes are closed, and after establishing  
oil pressure, a 15 second start signal is  
sent to the motor starter. A successful  
start and acceleration of the motor is  
followed by the “UNIT IS RUNNING”  
message.  
Under normal conditions and when the  
control source maintains an Auto signal,  
a stop signal originates from the chiller  
module which senses no further cooling  
demand. At this time a “UNIT IS  
PREPARING TO SHUT DOWN” message  
appears as the guide vanes close. Then  
the compressor motor starter and  
condenser pump starter are de-  
energized while the oil pump continues  
to run for approximately  
two minutes. The CenTraVac can be  
manually stopped at any time by  
pushing the Stop key once for a  
“friendly” stop (coastdown) and  
twice within five seconds for an  
emergency stop.  
The condenser high pressure limit has  
been approached that further loading of  
the compressor may result in a trip out.  
(optional)  
“UNIT IS RUNNING CAPACITY LIMITED  
BY LOW EVAP TEMP;”  
The evaporator low temperature limit  
has been approached that further  
loading of the compressor may result in  
a trip out.  
This Adaptive Control™ prevents a  
nuisance trip, alerts the operator to the  
condition, and takes the following  
corrective action:  
Any failure to complete a successful start  
causes the sequence to abort and the  
CenTraVac™ to coast to a stop. A  
diagnostic describing the reason for  
failure, time and date of failure, a help  
message and reset action required will  
tell the operator that the micro- controller  
has detected a problem during the  
attempted start. As soon as the fail  
condition is corrected and reset (either  
manual or automatic) is accomplished,  
the chiller can go through the start-up  
sequence again.  
1
the control will limit the rate of inlet vane  
opening. If the condition worsens,  
then…  
2
the control will hold the inlet vane  
position. If the condition worsens,  
then…  
Normal operation messages will include  
information about limit modes when the  
3
the control will close the inlet vanes at a  
controlled rate until the condition  
stabilizes. If, however, the condition  
worsens, the final step will be to close  
the vanes even further.  
38  
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60 Hz Compressors  
(English & SI Units)  
Weights  
Operating Weight**  
Shipping Weight**  
TYPE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
CVHF  
NTON  
230-320  
230-320  
230-320  
230-320  
230-320  
230-320  
360-500  
360-500  
360-500  
360-500  
360-500  
360-500  
350-485  
350-485  
350-485  
350-485  
350-485  
350-485  
555-640  
555-640  
555-640  
555-640  
555-640  
555-640  
650-910  
650-910  
650-910  
650-910  
650-910  
650-910  
1060-1280  
1060-1280  
1060-1280  
1060-1280  
1060-1280  
1470  
CPKW  
287  
287  
287  
287  
287  
287  
453  
453  
453  
453  
453  
453  
453  
453  
453  
453  
453  
453  
588  
588  
588  
588  
588  
588  
745  
745  
745  
745  
745  
745  
1062  
1062  
1062  
1062  
1062  
1340  
1340  
EVSZ  
032S  
032S  
032L  
050S  
050S  
050L  
050S  
050S  
050L  
080S  
080S  
080L  
050S  
050S  
050L  
080S  
080S  
080L  
050S  
050S  
050L  
080S  
080S  
080L  
080S  
080S  
080L  
142M  
142L  
142E  
142M  
142L  
142E  
210L  
250E  
210L  
250E  
CDSZ  
032S  
032L  
032L  
050S  
050L  
050L  
050S  
050L  
050L  
080S  
080L  
080L  
050S  
050L  
050L  
080S  
080L  
080L  
050S  
050L  
050L  
080S  
080L  
080L  
080S  
080L  
080L  
142L  
142L  
142L  
142L  
142L  
142L  
210L  
250L  
210L  
250L  
(lbs)  
(kg)  
6763  
7053  
7449  
8405  
8844  
9430  
8700  
9139  
(lbs)  
(kg)  
6224  
6471  
6764  
7520  
7890  
8313  
7815  
8185  
14909  
15548  
16422  
18530  
19498  
20789  
19180  
20148  
21439  
26327  
27914  
30027  
18175  
19143  
20434  
25297  
26884  
28997  
19800  
20768  
22059  
26947  
28534  
30647  
28117  
29704  
31817  
41646  
42816  
44762  
42246  
43416  
45362  
53043  
66146  
57820  
70930  
13721  
14265  
14911  
16579  
17394  
18326  
17229  
18044  
18976  
23212  
24555  
26135  
16224  
17039  
17971  
22182  
23525  
25105  
17849  
18664  
19596  
23832  
25175  
26755  
25002  
26345  
27925  
36068  
36882  
38299  
36668  
37482  
38899  
45196  
55176  
49980  
59960  
9725  
8608  
11942  
12662  
13620  
8244  
8683  
9269  
11475  
12195  
13153  
8981  
10529  
11138  
11855  
7359  
7729  
8152  
10062  
10671  
11388  
8096  
8466  
8889  
10810  
11419  
12136  
11341  
11950  
12667  
16360  
16730  
17372  
16633  
17002  
17645  
20501  
25027  
22671  
27197  
9420  
10006  
12223  
12943  
13901  
12754  
13474  
14432  
18891  
19421  
20304  
19163  
19693  
20576  
24060  
30003  
26227  
32173  
1470  
** Note: Values represent maximum unit weights including unit mounted starters, shells with TECU .028”  
tubes, max bundles, and 150 psig non-marine waterboxes, and compressors with the largest, low voltage  
motors for each family.  
High voltage motors (to include the 1228 cpkw high voltage motor for the CVHF 1060-1280) weigh less than  
the low voltage motors shown in the table.  
CTV-PRC007-EN  
39  
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50 Hz Compressors  
(English & SI Units)  
Weights  
Operating Weight**  
Shipping Weight**  
TYPE  
NTON  
190-270  
190-270  
190-270  
190-270  
190-270  
190-270  
300-420  
300-420  
300-420  
300-420  
300-420  
300-420  
480-565  
480-565  
480-565  
480-565  
480-565  
480-565  
670-780  
670-780  
670-780  
670-780  
670-780  
920-1067  
920-1067  
920-1067  
CPKW  
242  
242  
242  
242  
242  
242  
379  
379  
379  
379  
379  
379  
548  
548  
548  
548  
548  
548  
716  
716  
716  
716  
716  
892  
892  
892  
EVSZ  
032S  
032S  
032L  
050S  
050S  
050L  
050S  
050S  
050L  
080S  
080S  
080L  
050S  
050S  
050L  
080S  
080S  
080L  
080S  
080S  
080L  
142M  
142L  
142M  
142L  
210L  
CDSZ  
032S  
032L  
032L  
050S  
050L  
050L  
050S  
050L  
050L  
080S  
080L  
080L  
050S  
050L  
050L  
080S  
080L  
080L  
080S  
080L  
080L  
142L  
142L  
142L  
142L  
210L  
(lbs)  
(kg)  
6468  
6758  
7154  
8110  
8549  
9135  
8700  
9139  
(lbs)  
(kg)  
5929  
6176  
6469  
7225  
7595  
8018  
7815  
8185  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHE  
CVHG  
CVHG  
CVHG  
CVHG  
CVHG  
CVHG  
CVHG  
CVHG  
CVHG  
CVHG  
CVHG  
CVHG  
CVHG  
CVHG  
14259  
14898  
15772  
17880  
18848  
21039  
19180  
20148  
21439  
26327  
27914  
30027  
20930  
21898  
23189  
28077  
29664  
31777  
28677  
30264  
32377  
42735  
43905  
44135  
45305  
54932  
13071  
13615  
14261  
15929  
16744  
17676  
17229  
18044  
18976  
23212  
24555  
26135  
18979  
19794  
20726  
24962  
26305  
27885  
25562  
26905  
28485  
37157  
37971  
38557  
39371  
47085  
9725  
8607  
11942  
12662  
13620  
9494  
10529  
11138  
11855  
8609  
8978  
9401  
11323  
11932  
12648  
11595  
12204  
12921  
16854  
17223  
17489  
17858  
21357  
9933  
10518  
12736  
13455  
14414  
13008  
13728  
14686  
19384  
19915  
20019  
20550  
24917  
**Note: Values represent maximum unit weights including unit mounted starters, shells with TECU .028”  
tubes, max bundles, and 150 psig non-marine waterboxes, and compressors with the largest, low voltage  
motors for each family.  
High voltage motors weigh less than the low voltage motors shown in the table.  
40  
CTV-PRC007-EN  
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Physical  
Dimensions  
50 Hz Compressors  
(English Units)  
ENGLISH UNITS  
Clearance  
Envelope  
W/O Unit  
Mounted  
Starters  
EW  
Unit Dimensions  
With Unit  
Mounted  
Starters  
EW  
W/O Unit  
Mounted  
Starters  
Width  
With Unit  
Mounted  
Starters  
Width  
Shell  
Arrange-  
ment  
Tube  
Pull  
Shell  
Size  
320  
320  
500  
500  
500  
500  
800  
800  
500  
500  
800  
800  
800  
800  
1420  
1420  
2100  
COMP  
190-270  
190-270  
190-270  
190-270  
300-420  
300-420  
300-420  
300-420  
480-565  
480-565  
480-565  
480-565  
670-780  
670-780  
670-780  
920-1067  
920-1067  
EL  
26' 5”  
CL1  
CL2  
3' 5”  
3' 5”  
Length  
Height  
7' 9 3/4  
7' 9 3/4  
8' 2 1/4  
8' 2 1/4  
8' 2 1/2  
8' 2 1/2  
9' 6 3/8  
9' 6 3/8  
8' 7 1/4  
8' 7 1/4  
SS  
10' 6 1/4  
10' 6 1/4  
11' 4 5/8  
11' 4 5/8  
11' 4 5/8  
11' 4 5/8  
12' 5 1/4  
12' 5 1/4  
11' 4 5/8  
11' 4 5/8  
12' 5 1/4  
12' 5 1/4  
”
”
”
”
”
”
”
”
”
”
”
”
11' 4 1/2  
”
”
”
”
”
”
”
”
11' 9”  
15' 6”  
11' 9”  
15' 6”  
11' 9”  
15' 6”  
11' 9”  
15' 6”  
11' 9”  
15' 6”  
11' 9”  
15' 6”  
11' 9”  
15' 6”  
15' 6”  
15' 6”  
15' 6”  
11' 3”  
”
”
”
”
”
”
”
”
5’ 9 1/4  
5” 9 1/4  
6' 7 5/8  
6' 7 5/8  
6' 7 5/8  
6' 7 5/8  
7' 11 1/4  
7' 11 1/4  
6' 7 5/8  
6' 7 5/8  
7' 11 1/4  
7' 11 1/4  
”
”
”
”
”
”
”
”
”
”
”
”
6' 7 1/2  
6' 7 1/2  
7' 9 7/8  
7' 9 7/8  
7' 8 1/2  
7' 8 1/2  
8' 7 5/8  
8' 7 5/8  
7' 8 3/4  
7' 8 3/4  
8' 7 5/8  
8' 7 5/8  
9' 1 3/4  
9' 1 3/4  
10' 3 7/8  
10' 3 7/8  
10' 10”  
”
”
”
”
SL & LL 33' 11 1/4  
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
11' 4 1/2  
12' 6 7/8  
12' 6 7/8  
12' 5 1/2  
12' 5 1/2  
13' 4 5/8  
13' 4 5/8  
12' 5 3/4  
12' 5 3/4  
13' 4 5/8  
15' 0 1/4  
”
SS  
SL & LL  
SS  
26' 6 3/8  
34' 0 5/8  
26' 6 3/8  
34' 0 5/8  
27' 4 1/4  
3' 6 3/8  
”
”
”
”
”
”
”
”
11' 3”  
C
V
H
E
3' 6 3/8  
3' 6 3/8  
3' 6 3/8  
4' 4 1/4  
4' 4 1/4  
3' 6 3/8  
3' 6 3/8  
4' 4 1/4  
4 4 1/4  
15' 0 1/4  
”
11' 3”  
”
”
”
”
SL & LL  
SS  
15' 0 1/4  
”
11' 3”  
SL & LL 34' 10 1/2  
15' 0 1/4  
”
SS  
SL & LL  
SS  
26' 6 3/8  
34' 0 5/8  
27' 4 1/4  
”
”
11' 3”  
”
”
”
”
”
”
15' 0 1/4  
”
”
”
”
”
11' 3”  
9' 8”  
C
V
H
G
SL & LL 34' 10 1/2  
13' 4 5/8  
15' 0 1/4  
”
9' 8”  
SS  
SL & LL 34' 10 1/2  
ML & LL 35' 5 1/4  
ML & LL 35' 5 1/4  
LL  
35' 5 1/4  
27' 4 1/4  
12' 10”  
13' 10 3/4  
13' 10 3/4  
”
”
4' 4 1/4  
”
11' 3”  
9' 6 3/4  
”
8' 4”  
”
”
”
”
12' 10”  
4' 4 1/4  
4' 11”  
4' 11”  
4' 11”  
”
15' 0 1/4  
”
”
”
”
9' 6 3/4  
10' 1 1/8  
10' 1 1/8  
11' 0 7/8  
”
”
”
”
8' 4”  
14' 5 3/4  
”
”
”
15' 0 7/8  
”
15' 0 1/4  
15' 0 1/4  
15' 0 1/4  
9' 11 3/4  
”
”
14' 5 3/4  
15 3 3/4  
15' 0 7/8  
”
9' 11 3/4  
10' 9 3/4  
”
15' 7”  
CL1 CAN BE AT EITHER END OF MACHINE AND IS REQUIRED FOR TUBE PULL CLEARANCE.  
CL2 IS ALWAYS AT THE OPPOSITE END OF MACHINE FROM CL1 AND IS REQUIRED FOR SERVICE CLEARANCE.  
CENTRAVAC WATER CONNECTION PIPE SIZE  
Water  
Passes  
Shell Size  
080  
032  
050  
142  
210  
EVAPORATOR  
1 PASS  
2 PASS  
3 PASS  
CONDENSER 2 PASS  
Nominal Pipe Size (Inches)  
8
6
5
6
10  
8
6
12  
10  
8
16  
12  
10  
12  
16  
14  
12  
14  
8
10  
CTV-PRC007-EN  
41  
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Physical  
Dimensions  
50 Hz Compressors  
(SI Units)  
METRIC UNITS  
Envelope  
W/O Unit  
Mounted  
Starters  
EW  
3207  
3207  
3470  
3470  
3470  
3470  
3867  
3867  
3470  
3470  
3867  
3867  
3912  
3912  
Clearance  
Unit Dimensions  
With Unit  
Mounted  
Starters  
EW  
3467  
3467  
3832  
3832  
3797  
3797  
4080  
4080  
3804  
3804  
4080  
4080  
4235  
4235  
W/O Unit  
Mounted  
Starters  
Width  
1759  
With Unit  
Mounted  
Starters  
Width  
2019  
2019  
2384  
2384  
2350  
2350  
2632  
2632  
2356  
2356  
2632  
2632  
2788  
2788  
3146  
Shell  
Arrange-  
ment  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
ML & LL  
ML & LL  
LL  
Tube  
Pull  
CL1  
Shell  
Size  
320  
320  
500  
500  
500  
500  
800  
800  
500  
500  
800  
800  
800  
800  
1420  
1420  
2100  
COMP  
190-270  
190-270  
190-270  
190-270  
300-420  
300-420  
300-420  
300-420  
480-565  
480-565  
480-565  
480-565  
670-780  
670-780  
670-780  
920-1067  
920-1067  
EL  
8052  
10344  
8087  
10379  
8087  
10379  
8338  
10630  
8087  
10379  
8338  
10630  
8338  
10630  
10754  
10754  
10801  
CL2  
1041  
1041  
1076  
1076  
1076  
1076  
1327  
1327  
1076  
1076  
1327  
1327  
1327  
1327  
1499  
1499  
1499  
Length  
3429  
4578  
3429  
4578  
3429  
4578  
3429  
4578  
3429  
4578  
3429  
4578  
3429  
4578  
4578  
4578  
4578  
Height  
2380  
2380  
2494  
2494  
2502  
2502  
2905  
2905  
2624  
2624  
2946  
2946  
2915  
2915  
3077  
3077  
3375  
3581  
4724  
3581  
4724  
3581  
4724  
3581  
4724  
3581  
3581  
4724  
4724  
3581  
4724  
4724  
4724  
4724  
1759  
2022  
2022  
2022  
C
V
H
E
2022  
2419  
2419  
2022  
2022  
2419  
2419  
2540  
C
V
H
G
2540  
3042  
3042  
3296  
4413  
4413  
4667  
4594  
4594  
4750  
3146  
3302  
CL1 CAN BE AT EITHER END OF MACHINE AND IS REQUIRED FOR TUBE PULL CLEARANCE.  
CL2 IS ALWAYS AT THE OPPOSITE END OF MACHINE FROM CL1 AND IS REQUIRED FOR SERVICE CLEARANCE.  
CENTRAVAC WATER CONNECTION PIPE SIZE  
Water  
Passes  
Shell Size  
080  
032  
050  
142  
210  
EVAPORATOR  
Metric Pipe Size (Millimeters)  
1 PASS  
2 PASS  
3 PASS  
DN200  
DN150  
DN125  
DN150  
DN250  
DN300  
DN250  
DN200  
DN250  
DN400  
DN400  
DN350  
DN300  
DN350  
DN200  
DN150  
DN200  
DN300  
DN250  
DN300  
CONDENSER 2 PASS  
42  
CTV-PRC007-EN  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Physical  
Dimensions  
60 Hz Compressors  
(English Units)  
ENGLISH UNITS  
Clearance  
Envelope  
W/O Unit  
Mounted  
Starters  
EW  
Unit Dimensions  
With Unit  
Mounted  
Starters  
EW  
W/O Unit  
Mounted  
Starters  
Width  
With Unit  
Mounted  
Starters  
Width  
Shell  
Arrange-  
ment  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
ML & LL  
ML &LL  
EL  
Tube  
Pull  
Shell  
Size  
320  
320  
500  
500  
500  
500  
800  
800  
500  
500  
800  
800  
500  
500  
800  
800  
800  
800  
1420  
1420  
1420  
2100  
2500  
2100  
2500  
COMP  
230-320  
230-320  
230-320  
230-320  
360-500  
360-500  
360-500  
360-500  
350-485  
350-485  
350-485  
350-485  
555 & 640  
555 & 640  
555 & 640  
555 & 640  
650-910  
650-910  
650-910  
1060-1280  
1060-1280  
1060-1280  
1060-1280  
1470  
EL  
CL1  
CL2  
3' 5”  
3' 5”  
Length  
Height  
7' 9 3/4  
7' 9 3/4  
8' 2 1  
8' 2 1/4  
8' 2 1/2  
8' 2 1/2  
9' 6 3/8  
9' 6 3/8  
26' 5”  
10' 6 1/4  
10' 6 1/4  
11' 4 5/8  
11' 4 5/8  
11' 4 5/8  
11' 4 5/8  
12' 5 1/4  
12' 5 1/4  
11' 4 5/8  
11' 4 5/8  
12' 5 1/4  
12' 5 1/4  
11' 4 5/8  
11' 4 5/8  
12' 5 1/4  
12' 5 1/4  
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
11' 4 1/2  
11' 4 1/2  
12' 6 7/8  
12' 6 7/8  
12' 5 1/2  
12' 5 1/2  
13' 4 5/8  
13' 4 5/8  
12' 5 1/2  
12' 5 1/2  
13' 4 5/8  
13' 4 5/8  
12' 5 3/4  
12' 5 3/4  
13' 4 5/8  
”
”
”
”
”
”
”
”
”
”
”
”
”
”
11' 9”  
15' 6”  
11' 9”  
15' 6”  
11' 9”  
15' 6”  
11' 9”  
15' 6”  
11' 9”  
15' 6”  
11' 9”  
15' 6”  
11' 9”  
15' 6”  
11' 9”  
15' 6”  
11' 9”  
15' 6”  
15' 6”  
15' 6”  
17' 5”  
15' 6”  
17' 5”  
15' 6”  
17' 5”  
11' 3”  
”
”
”
”
”
”
”
”
5’ 9 1/4  
5” 9 1/4  
6' 7 5/8  
6' 7 5/8  
6' 7 5/8  
6' 7 5/8  
7' 11 1/4  
7' 11 1/4  
6' 7 5/8  
6' 7 5/8  
7' 11 1/4  
7' 11 1/4  
6' 7 5/8  
6' 7 5/8  
7' 11 1/4  
7' 11 1/4  
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
6' 7 1/2  
6' 7 1/2  
7' 9 7/8  
7' 9 7/8  
7' 8 1/2  
7' 8 1/2  
8' 7 5/8  
8' 7 5/8  
7' 8 1/2  
7' 8 3/4  
8' 7 5/8  
8' 7 5/8  
7' 8 3/4  
7' 8 3/4  
8' 7 5/8  
8' 7 5/8  
9' 1 3/4  
9' 1 3/4  
10' 3 7/8  
10' 3 7/8  
10' 3 7/8  
”
”
”
”
”
”
”
”
33' 11 1/4  
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
15' 0 1/4  
”
26' 6 3/8  
3' 6 3/8  
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
11' 3”  
4
C
V
H
E
34' 0 5/8  
3' 6 3/8  
3' 6 3/8  
3' 6 3/8  
4' 4 1/4  
4' 4 1/4  
3' 6 3/8  
3' 6 3/8  
4' 4 1/4  
4' 4 1/4  
3' 6 3/8  
3' 6 3/8  
4' 4 1/4  
4' 4 1/4  
4' 4 1/4  
15' 0 1/4  
”
26' 6 3/8  
11' 3”  
34' 0 5/8  
15' 0 1/4  
”
27' 4 1/4  
11' 3”  
34' 10 1/2  
15' 0 1/4  
”
26' 6 3/8  
11' 3”  
8' 4”  
”
”
”
”
”
”
”
”
34' 0 5/8  
15' 0 1/4  
”
8' 4”  
27' 4 1/4  
11' 3”  
9' 6 1/2  
”
34' 10 1/2  
15' 0 1/4  
”
9' 6 1/2  
”
26' 6 3/8  
11' 3”  
8' 7 1/4  
”
”
C
V
H
F
34' 0 5/8  
15' 0 1/4  
”
8' 7 1/4  
9' 8”  
9' 8”  
27' 4 1/4  
”
”
11' 3”  
34' 10 1/2  
13' 4 5/8  
15' 0 1/4  
”
27' 4 1/4  
12' 10”  
13' 10 3/4  
13' 10 3/4  
”
”
11' 3”  
9' 6 3/4  
”
”
8' 4”  
”
”
”
”
34' 10 1/2  
12' 10”  
4' 4 1/4  
4' 11”  
4' 11”  
4' 11”  
4' 11”  
5' 2 1/8”  
4' 11”  
”
15' 0 1/4  
”
9' 6 3/4  
10' 1 1/8  
10' 1 1/8  
10' 1 1/8  
8' 4”  
35' 5 1/4  
14' 5 3/4  
”
15' 0 7/8  
”
15' 0 1/4  
”
”
”
”
9' 11 3/4  
”
”
”
”
35' 5 1/4  
39' 2 7/8  
35' 5 1/4  
39' 5 7/8  
35' 5 1/4  
39' 5 7/8  
14' 5 3/4  
”
15' 0 7/8  
”
15' 0 1/4  
9' 11 3/4  
14' 5 3/4  
”
15' 0 7/8  
15' 7”  
16' 7”  
15' 7”  
16' 7”  
”
16' 10 3/4  
”
”
9' 11 3/4  
”
LL  
EL  
LL  
EL  
15' 3 3/4  
”
15' 0 1/4  
”
11' 0 7/8  
”
10' 9 3/4  
10' 10”  
11' 11 1/2”  
10' 10”  
16' 7”  
16' 10 3/4”  
15' 0 1/4  
16' 10 3/4  
11' 4 7/8  
”
11' 11 1/2”  
15' 3 3/4  
”
”
11' 5”  
10' 9 3/4  
”
1470  
16' 7”  
5' 2 1/8  
”
”
11' 4 7/8  
”
11' 11 1/2  
”
11' 11 1/2  
”
CL1 CAN BE AT EITHER END OF MACHINE AND IS REQUIRED FOR TUBE PULL CLEARANCE.  
CL2 IS ALWAYS AT THE OPPOSITE END OF MACHINE FROM CL1 AND IS REQUIRED FOR SERVICE CLEARANCE.  
CENTRAVAC WATER CONNECTION PIPE SIZE  
Water  
Passes  
Shell Size  
080  
032  
050  
142  
210  
250  
EVAPORATOR  
1 PASS  
2 PASS  
3 PASS  
CONDENSER 2 PASS  
Nominal Pipe Size (Inches)  
8
6
5
6
10  
8
6
12  
10  
8
16  
12  
10  
12  
16  
14  
12  
14  
16  
14  
12  
14  
8
10  
CTV-PRC007-EN  
43  
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Physical  
Dimensions  
60 Hz Compressors  
(SI Units)  
METRIC UNITS  
Envelope  
W/O Unit  
Mounted  
Starters  
EW  
3207  
3207  
3470  
3470  
3470  
3470  
3867  
3867  
3470  
3470  
3867  
3867  
3470  
3470  
3867  
3867  
3912  
3912  
4413  
4413  
4413  
4667  
Clearance  
Unit Dimensions  
With Unit  
Mounted  
Starters  
EW  
W/O Unit  
Mounted  
Starters  
Width  
1759  
1759  
2022  
2022  
2022  
2022  
2419  
2419  
2022  
2022  
2419  
2419  
2022  
2022  
2419  
2419  
2540  
2540  
3042  
3042  
3042  
3296  
3645  
3296  
3645  
With Unit  
Mounted  
Starters  
Width  
2019  
2019  
2384  
2384  
2350  
2350  
2632  
2632  
2350  
2350  
2632  
2632  
2356  
2356  
2632  
2632  
2788  
2788  
3146  
3146  
3146  
3302  
3645  
3302  
3645  
Shell  
Arrange-  
ment  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
SS  
SL & LL  
Tube  
Pull  
CL1  
Shell  
Size  
320  
320  
500  
500  
500  
500  
800  
800  
500  
500  
800  
800  
500  
500  
800  
800  
800  
800  
1420  
1420  
1420  
2100  
2500  
2100  
2500  
COMP  
230-320  
230-320  
230-320  
230-320  
360-500  
360-500  
360-500  
360-500  
350-485  
350-485  
350-485  
350-485  
555 & 640  
555 & 640  
555 & 640  
555 & 640  
650-910  
650-910  
650-910  
1060-1280  
1060-1280  
1060-1280  
1060-1280  
1470  
EL  
8052  
10344  
8087  
10379  
8087  
10379  
8338  
10630  
8087  
10379  
8338  
10630  
8087  
10379  
8338  
10630  
CL2  
1041  
1041  
1076  
1076  
1076  
1076  
1327  
1327  
1076  
1076  
1327  
1327  
1076  
1076  
1327  
1327  
1327  
1327  
1499  
1499  
1499  
1499  
1578  
1499  
1578  
Length  
3429  
4578  
3429  
4578  
3429  
4578  
3429  
4578  
3429  
4578  
3429  
4578  
3429  
4578  
3429  
4578  
3429  
4578  
4578  
4578  
5150  
4578  
5150  
4578  
5150  
Height  
2380  
2380  
2494  
2494  
2502  
2502  
2905  
2905  
2540  
2540  
2908  
2908  
2624  
2624  
2946  
2946  
2915  
2915  
3077  
3077  
3077  
3375  
3477  
3479  
3585  
3467  
3467  
3832  
3832  
3797  
3797  
4080  
4080  
3797  
3797  
4080  
4080  
3804  
3804  
4080  
4080  
4235  
4235  
4594  
4594  
4594  
4750  
5055  
4750  
5055  
3581  
4724  
3581  
4724  
3581  
4724  
3581  
4724  
3581  
4724  
3581  
4724  
3581  
4724  
3581  
4724  
3581  
4724  
4724  
4724  
5309  
4724  
5309  
4724  
5309  
C
V
H
E
C
V
H
F
SS  
8338  
SL & LL  
ML & LL  
ML &LL  
EL  
LL  
EL  
10630  
10754  
10754  
11909  
10801  
11069  
10801  
11069  
5055  
4667  
5055  
LL  
EL  
1470  
CL1 CAN BE AT EITHER END OF MACHINE AND IS REQUIRED FOR TUBE PULL CLEARANCE.  
CL2 IS ALWAYS AT THE OPPOSITE END OF MACHINE FROM CL1 AND IS REQUIRED FOR SERVICE CLEARANCE.  
CENTRAVAC WATER CONNECTION PIPE SIZE  
Water  
Passes  
Shell Size  
080  
032  
050  
142  
210  
250  
EVAPORATOR  
1 PASS  
2 PASS  
3 PASS  
CONDENSER 2 PASS  
Metric Pipe Size (Millimeters)  
DN200  
DN150  
DN125  
DN150  
DN250  
DN200  
DN150  
DN200  
DN300  
DN250  
DN200  
DN250  
DN400  
DN300  
DN250  
DN300  
DN400  
DN350  
DN300  
DN350  
DN400  
DN350  
DN300  
DN350  
44  
CTV-PRC007-EN  
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Waterbox  
Connection  
Dimensions Arrangement  
Physical  
These graphics are intended to help you visualize the possible connections/combinations that may be available for your unit. You must contact  
your local Trane office who can configure your selection as an as-built drawing to confirm it is available and to provide appropriate dimensions.  
CTV-PRC007-EN  
45  
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Physical  
Dimensions  
Waterbox Lengths – English Units  
RETURN  
RETURN  
LENGTH  
6.125  
SHELL  
320  
320  
320  
320  
320  
320  
320  
320  
320  
320  
320  
320  
500  
500  
500  
500  
500  
500  
500  
500  
500  
500  
500  
500  
800  
800  
800  
800  
800  
800  
800  
800  
800  
800  
800  
800  
1420  
1420  
1420  
1420  
1420  
1420  
1420  
1420  
1420  
1420  
1420  
1420  
210  
210  
210  
210  
210  
210  
210  
210  
210  
210  
210  
210  
250  
250  
250  
250  
250  
250  
250  
250  
250  
250  
250  
250  
PRESSURE  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
EVAP  
MAR  
PASSES  
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
LENGTH  
16.12  
16.12  
16.12  
12.94  
12.94  
12.94  
16.12  
16.12  
16.12  
12.94  
12.94  
12.94  
18.5  
LENGTH  
COND  
MAR  
NO. PASSES  
LENGTH  
16.674  
2
2
MAR  
6.94  
NMAR  
9.25 cast  
6.125  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
6.94  
6.94  
6.94  
6.73  
6.73  
6.73  
6.73  
7.21  
7.21  
7.96  
7.96  
9.33  
9.33  
9.84  
9.84  
MAR  
NMAR  
2
2
17  
8
8
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
13.28/20.28  
MAR  
NMAR  
2
2
16.31  
10.5 cast  
7.875  
7.875  
18.5  
18.5  
12.73  
12.73  
12.73  
19  
MAR  
NMAR  
2
2
18.363  
12.86/20.46  
7.6  
7.6  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
19  
19  
12.73  
12.73  
12.73  
23.225  
21.225  
19.225  
13.19  
13.19  
13.19  
25  
MAR  
NMAR  
2
2
23.75  
14.2  
8.32  
8.32  
MAR  
NMAR  
2
2
28.14  
14.4/23.27  
8.93  
8.93  
23  
21  
13.96  
13.96  
13.96  
28.25  
25  
MAR  
NMAR  
2
2
28.25  
16  
9.25  
9.25  
23  
15.41  
15.41  
15.41  
31.056  
27.8  
MAR  
NMAR  
2
2
33.16  
15.79  
10.06  
10.06  
25.8  
15.59  
15.59  
15.59  
N/A  
N/A  
8.88  
MAR  
NMAR  
2
2
29.632  
16.38  
9.382  
9.382  
27.25  
25.25  
15.88  
15.88  
15.88  
N/A  
29.64  
29.64  
16.84  
16.84  
16.84  
N/A  
N/A  
N/A  
18.75  
18.75  
18.75  
N/A  
N/A  
N/A  
20.25  
20.25  
20.25  
8.88  
9.84  
9.84  
N/A  
MAR  
NMAR  
2
2
35  
17.71  
10.71  
10.71  
MAR  
NMAR  
2
2
32  
17.75  
10.75  
10.75  
11.75  
N/A  
MAR  
NMAR  
2
2
38.3  
18.75  
11.75  
11.75  
13.25  
46  
CTV-PRC007-EN  
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Physical  
Dimensions  
Waterbox Lengths – Metric Units  
RETURN  
RETURN  
LENGTH  
156  
SHELL  
320  
320  
320  
320  
320  
320  
320  
320  
320  
320  
320  
320  
500  
500  
500  
500  
500  
500  
500  
500  
500  
500  
500  
500  
800  
800  
800  
800  
800  
800  
800  
800  
800  
800  
800  
800  
1420  
1420  
1420  
1420  
1420  
1420  
1420  
1420  
1420  
1420  
1420  
1420  
210  
210  
210  
210  
210  
210  
210  
210  
210  
210  
210  
210  
250  
250  
250  
250  
250  
250  
250  
250  
250  
250  
250  
250  
PRESSURE  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
150 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
300 PSIG  
EVAP  
MAR  
PASSES  
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
LENGTH  
409  
409  
409  
329  
329  
329  
409  
409  
409  
329  
329  
329  
470  
470  
470  
323  
323  
323  
483  
483  
483  
323  
323  
323  
590  
539  
488  
335  
335  
335  
635  
584  
533  
355  
355  
355  
718  
635  
584  
391  
391  
391  
789  
706  
655  
396  
396  
396  
N/A  
692  
641  
403  
403  
403  
N/A  
753  
753  
428  
428  
428  
N/A  
N/A  
N/A  
476  
476  
476  
N/A  
N/A  
N/A  
514  
514  
514  
LENGTH  
COND  
MAR  
NO. PASSES  
LENGTH  
424  
2
2
MAR  
176  
NMAR  
235 cast  
156  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
176  
176  
176  
171  
171  
171  
171  
183  
183  
202  
202  
237  
237  
250  
250  
MAR  
NMAR  
2
2
432  
337/515  
203  
203  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
NMAR  
2
2
414  
267 cast  
200  
200  
MAR  
NMAR  
2
2
466  
327/520  
193  
193  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
MAR  
MAR  
NMAR  
NMAR  
NMAR  
MAR  
NMAR  
2
2
603  
361  
211  
211  
MAR  
NMAR  
2
2
871  
366/591  
227  
227  
MAR  
NMAR  
2
2
718  
406  
235  
235  
MAR  
NMAR  
2
2
842  
401  
256  
256  
N/A  
226  
MAR  
NMAR  
2
2
753  
416  
238  
238  
226  
250  
250  
N/A  
298  
N/A  
337  
MAR  
NMAR  
2
2
889  
450  
272  
272  
MAR  
NMAR  
2
2
813  
451  
273  
273  
MAR  
NMAR  
2
2
973  
476  
298  
298  
CTV-PRC007-EN  
47  
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Mechanical  
Specification  
voltage, full voltage starting —  
Three annular grooves are machined into  
each tube hole to provide a positive  
liquid and vapor seal between the  
refrigerant and water side of the shell  
after tube rolling. Intermediate tube  
support sheets are positioned along the  
length of the shell to avoid contact and  
relative motion between adjacent tubes.  
Compressor  
Guide Vanes  
Fully modulating variable inlet guide  
vanes provide capacity control. The  
guide vanes are controlled by an  
externally mounted electric vane  
operator in response to refrigeration load  
on the evaporator.  
connecting links are furnished to convert  
the motor to a 3-lead motor. 2,300-  
through 4,160-volt, three-phase, 60-hertz  
and 3300 through 6600 volt three phase  
50 hertz motors are supplied with three  
terminal posts for full voltage (across-  
the-line) or reduced voltage (primary  
reactor or autotransformer) starting.  
Motor terminal pads are supplied. A  
removable sheet metal terminal box  
encloses the terminal board area.  
Tubes  
Impellers  
Individually replaceable externally finned  
seamless copper tubing, either internally  
enhanced (one-inch nominal diameter)  
or (three-quarter inch nominal diameter)  
is utilized as the evaporator heat transfer  
surface. Tubes are mechanically  
expanded into the tube sheets (and  
affixed to the intermediate support  
sheets with the clips) to provide a leak-  
free seal and eliminate tube contact and  
abrasion due to relative motion.  
Fully shrouded impellers are high  
strength aluminum alloy and directly  
connected to the motor rotor shaft  
operating at 3,600 rpm (60 hertz),  
3,000 rpm (50 hertz). Impellers are  
dynamically balanced and over-speed  
tested at 4,500 rpm; the motor-  
compressor assembly is balanced  
to a maximum vibration of .15 inch/  
second at 3600 rpm as measured on the  
motor housing.  
Motor Cooling  
Cooling is accomplished by liquid  
refrigerant pumped through the motor  
with a patented refrigerant pump. The  
refrigerant circulates uniformly over the  
stator windings and between the rotor  
and stator. The windings of all motors  
are specifically insulated for operation  
within a refrigerant atmosphere.  
Eliminators  
Compressor Casing  
Lubrication  
Multiple layers of metal mesh screen  
form the eliminators and are installed  
over the tube bundle along the entire  
length of the evaporator to prevent liquid  
refrigerant carryover into the  
compressor.  
Separate volute casings of refrigerant-  
tight, close-grained cast iron are used on  
the centrifugal compressor; each  
incorporating a parallel wall diffuser  
surrounded by a collection scroll. The  
diffuser passages are machined to  
ensure high efficiency. All casings are  
proof-tested and leak-tested.  
A direct-drive system, positive-  
displacement oil pump driven by a low  
voltage 3/4 horsepower, 120/60/1 or  
120/50/1 motor is submerged in the oil  
sump to assure a positive oil supply to  
the two compressor bearings at all  
times. A low watt-density heater  
maintains the oil temperature which  
minimizes its affinity for refrigerant. Oil  
cooling is provided by refrigerant.  
Refrigerant Distribution  
A refrigerant distribution compartment in  
the base of the evaporator assures  
uniform wetting of the heat transfer  
surface over the entire length of the shell  
and under varying loads. High velocity  
refrigerant spray impingement on the  
tubes is prevented through this design.  
Motor  
Compressor motors are hermetically  
sealed two-pole, low-slip squirrel cage,  
induction-type. They are built in  
Evaporator  
Shell and Waterboxes  
accordance with Trane specifications and  
guaranteed by the manufacturer for  
continuous operation at the nameplate  
rating. A load limit system provides  
protection against operation in excess of  
this rating. The rotor shaft is of heat-  
treated carbon steel and designed such  
that the first critical speed is well above  
the operating  
The evaporator shell is formed of carbon  
steel plate and incorporates a carbon  
rupture disc in accordance with the  
ANSI/ASHRAE 15 Safety Code. A  
refrigerant temperature coupling is  
provided for customer use or for use  
with a low limit controller.  
Refrigerant Flow Control  
A multiple orifice flow control system  
maintains the correct pressure  
differential between the condenser,  
economizer and evaporator over the  
entire range of loading. This patented  
system contains no moving parts.  
For all units, pass arrangements are  
available at 150 psig or 300 psig water  
side working pressures, with grooved  
connections. Flanged connections are  
also available. Marine-type waterboxes  
are available.  
speed. The control circuit prevents motor  
energization unless positive oil pressure  
is established. Impellers are keyed  
directly to the motor shaft and locked in  
position. Nonferrous, labyrinth-type seals  
minimize recirculation and gas leakage  
between the stages of the compressor.  
200- through 600-volt, three-phase, 60-  
hertz and 380 through 415 volt three  
phase 50 hertz motors are supplied with  
six terminal posts for full voltage (across-  
the-line) or reduced voltage (Star-Delta or  
autotransformer) starting. For low  
Shell Tests  
The refrigerant side of the evaporator  
shell, complete with tubes, but without  
waterbox covers, is proof-tested at  
45 psig, vacuum leak-tested and pressure  
leak-tested. The water side of the shell,  
with waterboxes in place, is  
Tube Sheets  
hydrostatically tested at one and one-  
half times the design working pressure,  
but not less than 225 psig. (These tests  
are not to be repeated at installation).  
A thick carbon steel tube sheet is welded  
to each end of the shell and is drilled and  
reamed to accommodate the tubes.  
48  
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Mechanical  
Specification  
The microprocessor controller is  
compatible with reduced voltage or full  
voltage electromechanical starters,  
variable speed drives, or solid state  
starters. Depending on the applicability,  
the drives may be factory-mounted or  
remote mounted.  
Condenser/Heat Recovery  
Condenser  
Economizer  
The CVHE/CVHG style CenTraVac™ two-  
stage economizer (single-stage  
economizer on CVHF style units) is a  
series of interstage pressure chambers  
which utilize a multiple orifice system to  
maintain the correct pressure differential  
between the condenser, economizer and  
evaporator over the entire range of  
loading. This patented system contains  
no moving parts.  
Shell and Waterboxes  
The condenser shell is formed of carbon  
steel plate designed and constructed in  
accordance with ANSI/ASHRAE 15  
Safety Code. For all units, all pass  
arrangements are available at 150 psig or  
300 psig water side working pressures  
with grooved connections. Flanged  
connections are also available. Marine-  
type waterboxes are available.  
The controller will load and unload the  
chiller via control of the stepper- motor/  
actuator which drives the inlet guide  
vanes open or closed. The load range  
can be limited either by a current limiter  
or by an inlet guide vane limit (whichever  
controls the lower limit). It will also  
Purge System  
Tube Sheets  
The CenTraVac chiller utilizes a purge  
system operating with a 120/60/1 or 120/  
50/1 power supply. The purge system,  
using an air-cooled condensing unit,  
operates automatically to remove any  
noncondensables and water vapor  
which may be present in the refrigerant  
system. Normal operating efficiency  
does not exceed 0.002 lbs. of refrigerant  
lost per pound of dry air removed.  
Noncondensable discharge and  
A thick carbon steel tube sheet is welded  
to each end of the shell and is drilled and  
reamed to accommodate the tubes.  
Three annular grooves are machined into  
each tube hole to provide a positive  
liquid and vapor seal between the  
refrigerant and water sides of the shell  
after tube rolling. Intermediate tube  
support sheets are positioned along the  
length of the shell to avoid contact and  
relative motion between adjacent tubes.  
control the evaporator and condenser  
pumps to insure proper chiller operation.  
The panel features machine protection  
shutdown requiring manual reset for:  
low evaporator refrigerant temperature  
•
•
high condenser refrigerant pressure  
•
low evaporator/condenser differential  
pressure  
low differential oil pressure  
•
low oil flow  
•
refrigerant return are automatic  
high oil temperature  
•
functions of the purge. The purge can be  
operated at any time independent of  
chiller operation. ASHRAE GUIDELINE 3  
recommends that the purge should be  
able to run even while the chiller is idle.  
Tubes  
critical sensor or detection circuit faults  
•
Individually replaceable externally finned  
seamless copper tubing, either internally  
enhanced (one-inch nominal diameter)  
or (three-quarter inch nominal diameter),  
is utilized as the condenser heat transfer  
surface.  
motor overload  
•
high motor winding temperature  
•
high compressor discharge  
•
temperature (option)  
starter contactor fault  
Purge unit includes lights to indicate  
condenser running, fault indication and  
service operation. An elapsed time meter  
is included as standard to monitor any  
amount of leak rate and running time.  
•
starter transition failure  
•
compressor failure to accelerate  
•
Refrigerant Gas Distribution  
external and local emergency stop  
•
A baffle between the tube bundle and the  
condenser shell distributes the hot gas  
longitudinally throughout the condenser  
downward over the tube bundle  
preventing direct impingement of high  
velocity compressor discharge gas upon  
the tubes.  
electrical distribution faults: phase loss,  
•
phase unbalance, phase reversal  
inter-processor communications lost  
•
Unit Control Panel  
high bearing temperature (optional)  
•
The microcomputer control panel is  
factory installed and tested on the  
CenTraVac™ unit. All controls necessary  
for the safe and reliable operation of the  
chiller are provided including oil  
management, purge operation, and  
interface to the starter. The control  
system is powered by a control power  
transformer included in the starter panel.  
The microcomputer control system  
processes the leaving evaporator fluid  
temperature sensor signal to satisfy the  
system requirements across the entire  
load range.  
free-cooling valve closure failure (free-  
•
cooling applications only)  
extended compressor surge  
•
Shell Tests  
actuator drive circuit fault  
•
The refrigerant side of the condenser  
shell with tubes, but without waterbox  
covers, is proof-tested at 45 psig, vacuum  
leak-tested and pressure leak- tested. The  
water side of the shell with waterboxes in  
place is hydrostatically tested at one and  
a half times the design working pressure,  
but not less than 225 psig. (These tests  
are not to be repeated at installation).  
Over 100 diagnostic checks are made  
and displayed when a fault is detected.  
The display indicates the fault, the type of  
reset required, the time and date the  
diagnostic occurred, the mode in which  
the machine was operating at the time of  
the diagnostic, and a help message. A  
diagnostic history will display the last 10  
diagnostics with the time and date of  
their occurrence.  
CTV-PRC007-EN  
49  
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Mechanical  
Specification  
The display also provides over 20 reports  
that are organized into four groupings:  
Custom Report, Chiller Report,  
Refrigerant Report, and Compressor  
Report. Each report contains data that is  
accessed by scrolling through the menu  
items.  
Each grouping will have a heading which  
describes the type of data in that  
grouping. This data includes:  
Process computer (interface optional)  
(control source not supplied by chiller  
manufacturer)  
Generic BAS (interface optional )  
(control source not supplied by chiller  
manufacturer)  
•
Painting  
All painted CenTraVac surfaces are  
coated with two coats of air-dry beige  
primer-finisher prior to shipment.  
•
Unit Mounted Starter Option  
The unit mounted starter can either be a  
star-delta or a solid-state starter in a  
NEMA 1 type enclosure. The starter is  
factory mounted and completely  
prewired to the compressor motor and  
the control panel. The CenTraVac chiller/  
starter assembly is factory tested.  
The control source with priority will then  
determine the active setpoints via the  
signal that is sent to the control panel.  
All water temperatures and setpoints  
•
Isolation Pads  
(as standard factory mounted  
temperature sensors)  
Isolation pads are supplied with each  
CenTraVac™ chiller for placement under  
all support points. They are constructed  
of molded neoprene.  
Current chiller operating mode  
•
Starter is provided with a 3 KVA control  
power transformer (120 volt secondary).  
The starter door is designed to  
Diagnostic history  
•
Control source (i.e. local panel, external  
•
source, remote BAS)  
Refrigerant and Oil Charge  
A full charge of refrigerant and oil is  
supplied with each unit. The oil ships in  
the unit’s oil sump and the refrigerant  
ships directly to the jobsite from  
refrigerant suppliers.  
accommodate a padlock.  
Current limit setpoint  
•
Water flows (optional)  
•
Available options include:  
Water pressure drops (optional)  
•
Circuit Breaker — A standard  
•
Outdoor air temperature (optional)  
•
interrupting capacity circuit breaker is  
available. The circuit breaker is  
mechanically interlocked to disconnect  
line power from starter when the  
starter door is open.  
Saturated refrigerant temperatures and  
•
pressures  
Purge suction temperature  
•
Evaporator refrigerant liquid level  
Thermometer Wells and Sight  
•
Condenser liquid refrigerant  
•
High Interrupting Capacity Circuit  
Glasses  
•
temperature  
Breaker — High interrupting capacity  
circuit breaker is available. This breaker  
is also interlocked to disconnect line  
power from the starter when the  
starter door is open.  
In addition to the thermowells provided  
for use with the standard unit safety  
controls, a well is provided for  
Compressor starts and hours running  
•
Phase currents  
•
Phase voltages (optional)  
•
measurement of the liquid refrigerant  
condensing temperature and a coupling  
for the evaporating temperatures. Sight  
glasses are provided for monitoring oil  
charge level, oil flow, compressor  
rotation and purge condenser drum.  
Watts and power factor (optional)  
•
Oil temperature and flow  
•
Circuit Breaker with Ground Fault —  
Ground fault protection is available  
with either standard or high  
•
Motor winding temperatures  
•
Bearing temperatures (optional)  
•
Refrigerant detection external to chiller  
•
interrupting capacity circuit breakers.  
An indicator light is provided to  
indicate if ground fault has occurred.  
in ppm (optional)  
All necessary settings and setpoints are  
programmed into the microprocessor  
controller via the keypad of the operator  
interface. The controller is capable of  
receiving signals from a variety of control  
sources (which are not mutually  
exclusive — i.e. any combination of  
control sources can coexist  
Insulation  
Current Limiting Circuit Breaker — A  
•
Factory applied insulation is available on  
all units. All low temperature surfaces  
are covered with 3/4-inch Armaflex II or  
equal (thermal conductivity = 0.28 Btu/hr-  
ft2), including the evaporator, waterboxes  
and suction elbow. The economizer and  
motor cooling lines are insulated with  
standard circuit breaker incorporating  
three current limiters with fuse links is  
available. A fault current in excess of  
the circuit breaker capacity will blow  
the fuse links and interrupt the fault  
current. The circuit breaker cannot be  
reset until the blown current limiters  
are replaced.  
3
1
simultaneously) and of being  
/
8” and /2” insulation respectively.  
programmed at the keypad as to which  
control source has priority. Control  
sources can be:  
Refrigerant Pumpout/  
Reclaim Connections  
The local operator interface (standard)  
•
Connections are factory provided as  
standard to facilitate refrigerant reclaim/  
removal required during maintenance or  
overhaul in accordance with ANSI/  
ASHRAE 15.  
The remote operator interface  
•
(optional)  
A 4-20 mA or 2-10 vdc signal from an  
•
external source (interface optional)  
(control source not supplied by chiller  
manufacturer)  
Tracer™ (interface optional) (Tracer  
•
supplied by Trane)  
50  
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Mechanical  
Specification  
Trane Adaptive Frequency™  
Drive (AFD)  
The Trane AFD is a closed-loop, liquid-  
cooled, microprocessor based PWM  
design that converts fixed utility voltage  
and frequency to a variable voltage and  
frequency via a two-step operation. The  
AFD is both voltage and current  
regulated. Output power devices: IGBT  
transistors.  
Digital keypad displays DC bus voltage,  
Chiller Unit Control Features for AFD  
The chiller unit control panel standard  
control capabilities provide for the  
control/configuration interface to, and  
the retrieval/display of the collaterally  
additional AFD related data. AFD  
standard design features controlled  
through the starter module of UCP2  
include:  
•
drive output motor current; output  
frequency (Hz); RPM; kW; percent  
motor torque; and elapsed time. LED’s  
also display drive status: running,  
remote, jog, auto, forward, reverse or  
program.  
One programmable analog output  
•
signal, (0-10 Vdc or 4-20 mA) for  
customer use.  
Current limited to 100%.  
•
Three programmable relay outputs for  
•
Auto restart after an interruption of  
•
customer use.  
The AFD is factory mounted on the  
chiller and ships completely assembled,  
wired and tested.  
power limited to four starts per hour,  
30 seconds between starts.  
Simple modular construction.  
•
The drive is rated for 480/60/3 input  
•
Output speed reference signal 2-10  
•
•
power, +/-10%, with a motor thermal  
overload capability of 110%  
continuous for 25 minutes to 150% for  
60 seconds, linear between 110 and  
150.  
vdc.  
Patented Trane AFD control logic is  
specifically designed to interface with the  
centrifugal water chiller controls. AFD  
control adapts to the operating ranges  
and specific characteristics of the chiller,  
and chiller efficiency is optimized by  
coordinating compressor motor speed  
and compressor inlet guide vane  
position. Chilled water control and AFD  
control work together to maintain the  
chilled water setpoint, improve efficiency  
and avoid surge. If a surge is detected,  
AFD surge avoidance logic will make  
adjustments to move away from and  
avoid surge at similar conditions in the  
future.  
Digital display on UCP2 panel: output  
speed in hertz, output speed in rpm,  
fault, amps, input line voltage.  
Motor overload protection.  
Loss of follower signal – in the event of  
Input displacement power factor will  
•
•
•
•
•
exceed .96 regardless of speed and load.  
•
Minimum efficiency of 97% at rated  
loss of input speed signal the AFD will  
default to 38 hertz or hold speed based  
on last reference received.  
load and 60 hertz.  
Soft-start; linear acceleration/coast to  
stop.  
Phase loss, reversal, imbalance  
•
Standard DC bus filter choke to limit  
protection.  
harmonic distortion.  
Power loss ride through.  
•
All control circuit voltages are  
•
Overvoltage/undervoltage protection.  
•
physically and electrically isolated from  
power circuit voltage.  
Motor overtemperature protection.  
•
Environmental ratings:  
150% instantaneous torque available  
•
32°F to 104°F (0°C to 40°F) operating  
for improved surge control.  
•
AFD is capable of operating at an altitude  
of 3300 feet rated output current. For  
every 300 feet above 3300 feet, the rated  
output current will be decreased by 1%.  
Critical frequency avoidance.  
temperature  
•
Output line-to-line and line-to-ground  
Altitude to 3300 feet (1000 m)  
•
•
short circuit protection.  
Humidity, 95% non-condensing  
•
Restart into a rotating motor.  
•
Input Line Reactor Option  
AFD Design Features  
AFD can be started without a motor  
•
Field installed option mounts on the  
input side of the AFD to reduce harmonic  
distortion and help meet IEEE-519  
guidelines. NEMA 1 enclosure; 5%  
impedance.  
NEMA 1 ventilated enclosure with a  
connected.  
•
hinged, locking door and door-  
mounted circuit breaker with shunt  
trip, is tested to a short circuit  
withstand rating of 65,000 amps per UL  
508. The entire package is UL/CUL  
listed.  
CTV-PRC007-EN  
51  
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The Trane Company is  
a participant in the  
Green Seal Program  
CTV-PRC007-EN  
Literature Order Number  
File Number  
PL-RF-CTV-000-PRC007-EN--0401  
CTV-DS-1 0500  
Supersedes  
The Trane Company  
An American Standard Company  
www.trane.com  
La Crosse  
Stocking Location  
For more information contact  
your local sales office or  
e-mail us at [email protected]  
Since The Trane Company has a policy of continuous product and product data improvement, it reserves  
the right to change design and specifications without notice.  
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