Chiller replacement. Temporary cooling
delivers uninterrupted cooling to a building or process during equipment retro-fitting, conversion or new equipment
installation. It allows service personnel
undisturbed access to the existing cooling system. For example, in spring 2004
the Berkshire School District in New York
turned to temporary cooling during renovation of its chiller plant. It rented a
chiller whose twin compres-sor/refrigerant circuits matched the
chiller to the building load, reducing
cycling and increasing efficiency in the
process. The district was so pleased
with the rental chiller’s performance,
service and low maintenance requirements that it designed the new chilled-water plant around the same chiller
model that provided the temporary-cooling solution.
Additional cooling capacity. Temporary
cooling provides additional capacity
when a facility’s cooling load exceeds
the capability of the current cooling
system, whether the load increase is the
result of seasonal heat waves, special
production processes, short-term projects or special orders.
Standby cooling. Temporary cooling
can be used to back up critical systems
and provide redundancy in the event a
primary or built-in backup system fails.
System testing or proving. Temporary
cooling can be used to determine sys-
tem requirements or viability before
Courtesy York International Corp.
In use outside a school, these two air-cooled screw chillers are mounted on trailers so they are more
convenient and easy to move. Factory charging with refrigerant and oil plus factory wiring simplify field
installation, an important consideration in temporary cooling applications.
new equipment is purchased. Using a
rental system before purchasing a new
chiller system could save money and
provide a better system design in the
long run. In addition, it may be possible
for business owners to rent the same
equipment they intend to purchase.
Financial considerations. When a capital budget does not allow for the purchase of a much-needed new chiller,
temporary cooling can bridge the gap
until budgeting issues can be resolved.
Delayed delivery. Temporary cooling
can meet cooling needs when the delivery of a chiller is delayed.
Unique applications. Temporary cooling can satisfy needs that arise during
special events such as conferences,
sporting events, political conventions,
Courtesy York International Corp.
An air-cooled screw chiller sits on top of a trailer. The large black pipes hanging from the system (left)
provide a simple connection to a building’s HVAC system.
Selecting a Supplier
Contingency planning should include
the identification of the specific cooling
requirements. Taking this step allows a
facility to shop for the supplier that can
best provide the temporary solution that
will meet its needs. When considering
suppliers, it is important to ask a few key
Does the potential supplier operate a
dedicated rental group within its organization?
Where are the equipment and the supplier located? Will the supplier be able
to provide prompt service?
Does the potential supplier offer a complete line of heating, ventilating and air-conditioning (HVAC) products and supporting equipment?
Will a supplier representative visit the
facility to assist in developing the cooling system requirements?
Is the potential supplier an original-equipment manufacturer that can offer