Q: ARE CARRIER TRUs EPA- AND CARB-COMPLIANT WITHOUT THE EES?
A: Yes. Under rules for engines less than 25 horsepower, Carrier TRUs are US EPA “evergreen” outside
California. Under rules unique to California (CARB), Carrier TRUs can be used for seven years from the
model year of the engine. After the initial seven-year period, CARB requires the user to install a Level 3
VDECS such as an EES, or to use an alternative technology such as electric standby, to continue
use in California (only).
Q: HOW OFTEN DOES THE EES REQUIRE SERVICE?
A: The EES service interval is designed to correspond with the 3,000-hour maintenance interval of the TRU.
Q: WHAT ARE THE SERVICE REQUIREMENTS ON THE EES?
A: The filter must be cleaned of ash. Under normal TRU operation, the filter does not require baking due to
the silicon carbide filter element and Carrier’s exclusive regeneration strategy.
Q: WHAT IS THE LIFE EXPECTANCY OF THE EES?
A: EES assembly life is designed to be equivalent to the TRU.
Q: DOES THE EES AFFECT UNIT FUEL CONSUMPTION?
A: TRU fuel consumption will increase approximately 3%. This is more than offset by fuel savings up to 22%
depending on the Tier 4 model platform.
Q: WILL IT COST A LOT MORE TO INSTALL THE EES LATER?
A: The EES is designed to be “plug and play.” Space is reserved inside the unit, mounting holes are in the
frame, and electrical connections are in the TRU harness. Approximately five hours of labor are required to
remove the exhaust system and install the EES.
Q: HOW MUCH DOES THE EES WEIGH?
A: Approximately 50 pounds. When the muffler is replaced with the EES, the net effect increases unit weight
approximately 40 pounds.
Q: ARE THERE SPECIAL ENGINE MAINTENANCE REQUIREMENTS WHEN FITTED WITH AN EES?
A: Standard engine maintenance applies. An EES-equipped system requires ultra-low-sulfur diesel fuel and
low-ash engine oil.
Q: ARE THERE ANY BUTTONS TO PUSH OR OTHER STEPS TO INITIATE REGENERATION?
A: No. The regeneration operating logic, whether passive or active, is automatic and inconspicuous. No
operator intervention is required, and it does not interfere with TRU operation.
Q: CAN I REMOVE AN EES FROM AN EXISTING TRU AND REINSTALL IT ON A DIFFERENT TRU?
A: Yes, provided there is common ownership of TRUs and CARB Advisory 420 rules are followed. However,
the EES may not be transferred if it is more than 10 years old. A used EES cannot be resold.
THERE’S NO QUESTION:
EES IS THE ANSWER.