Trane CGAM air-cooled scroll chiller Brochure

CGAM air-cooled

scroll chiller

Highly efficient, yet extremely quiet

Balancing energy effi ciency
and quiet operation

Energy effi ciency, sound, reliability, controls and

service are all vitally important to the effective

operation of a building. Trane engineers know

how important all these factors are to you—so

we designed them all into our new 20-130 ton

model CGAM chiller. Using the best elements of

each design we created an extremely quiet and

highly effi cient chiller.

High effi ciency and quiet operation

Most air-cooled chillers require you to choose

between a highly-effi cient unit or a low-noise

unit. A quieter fan often produces less air fl ow,

reducing effi ciency. With the Trane CGAM chiller,

we have designed these two very important

benefi ts into one chiller.

Our design team compiled the best approaches

from around the globe to optimize the CGAM

chiller so that it meets global green initiatives

and ASHRAE energy effi ciency standards.

The Trane CGAM chiller is one of the most

effi cient air-cooled chillers, even among screw

compressor equipment. Low sound levels are

standard, with a 5–8db reduction compared to

previous Trane air-cooled chiller models. And,

with factory-installed attenuation, Trane further

reduces sound levels—up to an additional 3db.

Reliability you can count on

Energy effi ciency and quiet operation are

increasingly critical. As a result, we perform

extensive testing on the compressors and units,

confi rming their robust design and durability

while ensuring our high standards for reliability.

Our testing includes:

• Extreme testing includes cold ambient starts,

hot water starts and high ambient operation

• Compressor accelerated life cycle testing,

including high pressure ratio, high load test,

fl ooded starts/stops, start/stop testing

and phase reversal

3 Air-cooled scroll chiller

On-site test
facility ensures
reliability and
performance
verification

• Performance modeling and verifi cation, both

during design and for the life of the chiller

• FEA analysis confi rms the unit structure

can withstand shipping, rigging and

operational activity

• Electrical testing with destructive testing for

short circuit withstand rating

To minimize leaks, Trane improved the coil

structure stability by strengthening the coil frame

and changing the construction method. Now we

use a single copper tube for two passes through

the coil to reduce braze joints on one side of the

coil, eliminating up to 60 joints. Furthermore,

the new construction method ensures all

coils are square, so the coil components

are better aligned.

Trane reduces energy costs by incorporating an ice storage system
design that uses ice made at night, when energy demand and cost are
lowest, to cool the building during the day.

Factory installed reliability

We offer several factory-installed features

that further reduce energy consumption, add

redundancy for mission-critical operations and

reduce jobsite installation time — when every

day counts.

A factory-installed pump package, designed

specifi cally for this unit, comes pre-wired and

factory-tested. The dual pump setup provides

built-in redundancy and the standard inverter

delivers added pump energy savings.

With the factory-installed buffer tank, you can

install the chiller in applications with less than a

three minute water loop and still reliably maintain

precise temperature control.

The fl ow switch and water strainer are also

factory installed as standard, reducing jobsite

installation requirements and ensuring

reliable operation.

Low life cycle costs

Trane engineers, using some of the best analytic

approaches and tools in the industry, can fi nd

ways to reduce your energy usage by optimizing

energy effi ciency and performance at every point

within your system. We design systems tailored

for your specifi c application. For example, using

partial heat recovery, the heat rejected from

the condenser while cooling the building can

be redirected through a factory-installed heat

exchanger on the chiller to provide heat for

VAV reheat coils. This provides more effi cient

dehumidifi cation in commercial buildings,

or for pre-heating laundry or pool water in

lodging applications.

Another energy saving strategy is making

ice wherever energy costs are less expensive,

and then using it for cooling during the day.

Ice storage can be used in many applications

including: K-12 schools, government jobs and

industrial processes.

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