Catalogue

10 CG-PRC017H-EN
Application Considerations
Another advantage of an ice storage system is its ability to eliminate chiller over sizing. A
“rightsized” chiller plant with ice storage operates more efficiently with smaller support equipment
while lowering the connected load and reducing operating costs. Best of all this system still
provides a capacity safety factor and redundancy by building it into the ice storage capacity for
practically no cost compared to over sized systems.
TheTrane air-cooled chiller is uniquely suited to low temperature applications like ice storage
because of the ambient relief experienced at night. Chiller ice making efficiencies are typically
similar to or even better than standard cooling daytime efficiencies as a result of night-time dry-
bulb ambient relief.
Standard smart control strategies for ice storage systems are another advantage of the CGAM
chiller.The dual mode control functionality are integrated right into the chiller.TraneTracer
building management systems can measure demand and receive pricing signals from the utility
and decide when to use the stored cooling and when to use the chiller.
Partial Heat Recovery Operation
Partial heat recovery is designed to salvage a portion of the heat that is normally rejected to the
atmosphere through the air-cooled condenser coil and put it to beneficial use. With the addition of
a heat recovery cycle, heat removed from the building cooling load can be transferred to a preheat
application. Keep in mind that the heat recovery cycle is only possible if a cooling load exists to act
as a heat source.
To provide a heat recovery cycle, a supplemental heat exchanger is mounted in series to the air-
cooled condenser.The supplemental heat exchanger is piped into a preheat circuit. During the heat
recovery cycle, the unit operates just as it does in the cooling-only mode except that a portion of
the cooling load heat is rejected to the water heating circuit rather than to the air through the air-
cooled condenser. Water circulated through the heat recovery heat exchanger by the pumps
absorbs cooling load heat from the compressed refrigerant gas discharged by the compressors.
The heated water is then used to satisfy heating requirements.
Partial heat recovery can be used in applications where hot water is needed for use in kitchens,
lavatories, etc. It is comparatively smaller in size and its heating capacity is not controlled.The
partial heat recovery heat exchanger cannot operate alone without a load on the chiller.
The partial heat recovery heat exchanger can get up to 157°F (69.4°C) leaving temperature. For
more information see the Performance Selection Program.
Unit Placement
Setting The Unit
A base or foundation is not required if the selected unit location is level and strong enough to
support the unit’s operating weight (see “Weights” section of this catalog).
For a detailed discussion of base and foundation construction, refer to the sound engineering
bulletin or the unit IOM. Manuals are available through the localTrane office.
HVAC equipment must be located to minimize sound and vibration transmission to the occupied
spaces of the building structure it serves. If the equipment must be located in close proximity to
a building, it should be placed next to an unoccupied space such as a storage room, mechanical
room, etc. It is not recommended to locate the equipment near occupied, sound sensitive areas of
the building or near windows. Locating the equipment away from structures will also prevent
sound reflection, which can increase sound levels at property lines or other sensitive points.