System information

System Information and Variables
The system regulates the occurrence and duration of the regeneration event
solely by exhaust back pressure. Additionally, exhaust temperature is used to
control heater power and verify that the heater is working. These values may
be monitored in the DPF Manager/Variables menu item on the Driver's Control
Panel for the APU. The DCP2 will also display messages about the operation
of the DPF system and any faults that occur.
Ash and Cleaning
During regeneration the soot is burned out of the filter. However, the filter also
collects particles which do not burn such as sulfur and phosphorus from fuel
and oil and particles of iron from engine wear. These "ash" components remain
in the filter and build up over time causing the filter to gradually plug up to the
point where even a regeneration cycle will not restore the filter to a clean state.
When this happens the system will indicate on the DCP2 that the filter needs to
be cleaned. The filter element must be removed from the system and cleaned in a
cleaning machine or exchanged for a clean filter. This can be done at an authorized
Carrier Service Center. The ash collected from the filter must be considered a
hazardous material that must be captured and handled properly. This material
must be disposed of in accordance with local, state and federal regulations.
Since much of the ash comes from the fuel and oil it is important to use
good quality low sulfur fuel and oil that meets the API CJ-4 "Low Ash"
standards. Low sulfur fuel (less than 15ppm) is the standard fuel available
throughout the United States and Canada.
Expected Performance
The time between regeneration events depends on many things including how
the APU is being used (what load is on the system), weather conditions, state
of tune of the APU and the age of both the DPF and APU. As a general guideline,
a regeneration can be expected once every 10–30 hours of APU operation time.
The regeneration will typically last 20 minutes.
The expected interval for filter cleaning is once every 1000 hours of APU
operation and coincides with the standard APU service interval. However, the
system will i
ndicate when a cleaning is required and the actual time between
cleanings may be shorter or longer depending on factors already indicated.
Operating Considerations and Parameters
In general the system will operate automatically with no intervention required
from the user.
When the exhaust pressure exceeds 100mBar the system will automatically
perform a regeneration when the APU is turned off. In this state the DCP2 will
show "DPF Regen Soon" at the bottom of the display. When the ON/OFF button
is pressed the APU will continue running and the DPF system will begin
regenerating the filter.
If the APU is allowed to continue running the exhaust pressure continues to
build. When the pressure reaches 130mB the system will start a regeneration
cycle immediately.
The regeneration cycle is complete when the exhaust pressure goes below
30mB or if the system has been in the regeneration mode for 30 minutes.
The truck can be driven before the regeneration process is complete.
1.6.4
1.6.5
NOTICE
Even while the filter needs to be
cleaned, the system can still be
used but the regenerations will be
longer and more frequent.
5
CLEARSKY COMFORTPRO DPF ( PG1050 & PG1060) OPERATION & USERS MANUAL
1.6.6
1.6.7
NOTICE
For safety reasons it is always
possible to force the APU off by
holding the ON/OFF button for
5 seconds.