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RLC-PRC006-EN4
RTAC - Exceeding the Efficiency Standard
60 Hz Full Load Efficiency (EER*) Part Load Efficiency (EER*)
Tonnage ASHRAE 90.1 Standard Efficiency High Efficiency ASHRAE 90.1 Standard Efficiency High Efficiency
140 9.6 9.7 10.4 10.4 13.2 13.6
155 9.6 9.8 10.4 10.4 13.5 13.9
170 9.6 9.9 10.5 10.4 13.2 13.7
185 9.6 9.7 10.3 10.4 13.1 13.5
200 9.6 9.6 10.1 10.4 12.9 13.3
225 9.6 9.6 10.2 10.4 13.2 13.6
250 9.6 9.6 10.1 10.4 12.8 13.0
275 9.6 9.7 10.4 10.4 13.3 13.8
300 9.6 9.6 10.0 10.4 13.7 13.8
350 9.6 9.6 10.4 10.4 13.2 14.5
400 9.6 9.6 10.0 10.4 13.7 13.9
450 9.6 9.6 n/a 10.4 14.0 n/a
500 9.6 9.6 n/a 10.4 13.9 n/a
*COP = EER/3.414
Features and
Benefits
ASHRAE Standard 90.1 and
RTAC World Class Energy
Efficiency…
The importance of energy efficiency
cannot be understated. Fortunately,
ASHRAE has created a guideline
emphasizing its importance.
Nonetheless, energy is often dismissed
as an operational cost over which the
owner has little control. That perception
results in missed opportunities for
energy efficiency, reduced utility bills,
and higher profits. Lower utility bills
directly affect profitability. Every dollar
saved in energy goes directly to the
bottom line. Trane’s RTAC is one way to
maximize your profits.
ASHRAE Standard 90.1 & Executive
Order - New technology applied to the
design, controls, and manufacturing
have created excellent efficiency levels in
the RTAC that are helping to push
industry minimums to new heights. All
Trane air-cooled chillers meet the new
efficiency levels mandated by ASHRAE
Standard 90.1. This new standard
requires higher efficiencies than past
technologies can deliver. The US Federal
Government has adopted standard 90.1
and, in some cases, requires even higher
efficiencies. Federal Executive Order
mandates energy consuming devices
procured must be in the top 25% of their
class or be at least 10% better than any
product standard for that product. In the
case of chillers, that product standard is
ASHRAE 90.1. Trane’s RTAC meets and
exceeds the efficiency requirements of
90.1, while the high efficiency RTAC can
meet the “stretch goals” of Executive
Order.
Risk. The US Federal Government has
adopted ASHRAE 90.1, and it’s expected
to be adopted domestically, if not
globally, in the future. Domestic
acceptance has already begun. Make
sure that your chillers as well as your
entire HVAC system complies, or you
may be caught retrofitting your project
with new equipment and paying extra
design dollars if the code is adopted
during construction.
Precise Capacity Control. Trane’s
patented unloading system allows the
compressor to modulate infinitely and
exactly match building loads. At the
same time chilled water temperatures
will be maintained within +/- 1/2ºF of
setpoint. Reciprocating and screw
chillers with stepped capacity control do
well to maintain chilled water
temperatures within 2ºF of setpoint.
Stepped control also results in
overcooling your space because rarely
does the capacity of the machine match
the building load. The result can be 10%
higher energy bills. Trane’s RTAC
optimizes the part load performance of
your machine for energy efficiency,
precise control for process applications,
and your personal comfort regardless of
the weather outside.