Carrier Transicold X4™ Series Trailer Units Deliver Company’s Best-Ever Refrigeration Performance, Fuel Economy and EPA Compliance

Carrier Transicold has introduced its ultra-high efficiency X4™ Series for North America, delivering the highest refrigeration capacities currently offered in a trailer refrigeration platform, as well as compliance with Tier 4 emissions requirements from the U.S. Environmental Protection Agency. Carrier Transicold helps improve global transport and shipping temperature control with a complete line of equipment for refrigerated trucks, trailers and containers, and is a part of UTC Climate, Controls & Security, a unit of United Technologies Corp. (NYSE: UTX).

“Along with emissions compliance, the X4 Series offers the highest refrigeration capacities ever delivered by Carrier Transicold trailer units, combined with lower fuel consumption, lower maintenance costs, lighter weight and quieter operation than our prior platform,” said David Appel, president, Carrier Transicold. 

The X4 Series includes the new 7500 and 7300 single-temperature belt-driven models, which both require less power than Carrier Transicold’s prior platform as well as competitive equipment designed for 2013 Tier 4 compliance. Respectively, the new units provide 68,000 and 66,000 BTUs of cooling at a setpoint of 35 degrees Fahrenheit (100 F ambient). 

“Our new X4 Series uses significantly less engine power, fuel and refrigerant while still achieving higher refrigeration capacities and faster pulldown than our previous models,” said Tom Ondo, general manager, Truck/Trailer Americas, Carrier Transicold. “The new units are so efficient that they achieve 35 to 50 percent more BTUs of cooling per gallon of fuel, at AHRI rating conditions, than our current designs, making them a smart decision for fleets looking to optimize the efficiency of their refrigerated assets.”

Carrier’s exclusive  ecoFORWARD™ technologies refine the design of unit components and equip the 2.2 liter engine with sensors and an electronic control module that communicates with Carrier’s APX™ control system for optimized performance. 

“Individual components, such as the engine, work less and consume less to produce greater results in a straight-forward design that will be familiar to owners of prior Carrier equipment,” said David Kiefer, director, marketing and product management, Carrier Transicold.

Compared to the Carrier Transicold X2 series models they succeed – the 2100 and 2500 respectively – the new X4 units:
• Weigh 30 pounds less, which, at 230 pounds, makes them about 13 percent lighter than competitive models designed for 2013 EPA Tier 4 compliance;
• Provide 3 to 10 percent higher cooling capacity (depending on model);
• Achieve up to 20 percent faster pulldown;
• Consume 5 to 22 percent less fuel over a full range of operating conditions; and up to 35 percent less fuel during pulldown;
• Require 24 percent less refrigerant;
• Operate at up to 18 percent slower speeds and reduce engine runtime by up to 15 percent, resulting in improvements in durability and longevity as a result of more lightly loaded components.

“Ultra-high efficiencies reduce engine fuel consumption, and the greater cooling capacities help the units achieve setpoint faster and shut off sooner in start/stop mode,” Kiefer said. “This saves even more fuel, reducing engine run hours as well as runtime-based maintenance expense.”

Efficiency benefits improve as the units work harder.

“Proportionately, the greatest fuel savings come when the units are operating under the most demanding circumstances,” Kiefer said. “For example, when hauling frozen loads in higher-ambient temperatures, fuel savings of up to 22 percent, compared to earlier Carrier Transicold models, are possible.”

System improvements include high efficiency components, such as optimized V-Force™ fans and Novation™ micro-channel condenser coils. An electronic expansion valve is now standard, replacing mechanical expansion valves found on previous models and competitive units.

Using 18 percent less engine power than previous Carrier Transicold models, the X4 unit engines are certified for compliance with the 2013 EPA Tier 4 standard for engines less than 25 horsepower. Fleets will have the ability to equip units with an optional engine emissions system, further reducing emissions to provide future compliance in California beyond the initial seven years.

For more information about the X4 Series of single-temperature trailer units from Carrier Transicold, turn to the experts within the Carrier Transicold dealer network or visit You can also follow Carrier on Twitter: @carriergreen.

About Carrier Transicold
Carrier Transicold helps improve transport and shipping temperature control with a complete line of equipment and services for refrigerated transport and cold chain visibility. For more than 40 years, Carrier Transicold has been an industry leader, providing customers around the world with the most advanced, energy efficient and environmentally sound container refrigeration systems and generator sets, direct-drive and diesel truck units and trailer refrigeration systems.
Carrier Transicold is a part of UTC Climate, Controls & Security, a unit of United Technologies Corp., a leading provider to the aerospace and building systems industries worldwide. Visit for more information.  Follow Carrier on Twitter: @carriergreen.

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