Selective Catalytic Reduction Unit - PREVOST X3-45 VIP 2015 Owner's Manual

Initiating a Stationary (Parked) Regeneration
NOTE
At starting of the engine, if a stationary
regeneration is required, the engine coolant
temperature must reach 140°F (60°C) before
any stationary regeneration may be initiated
and completed. Permit the engine to idle for a
short while or drive the vehicle until engine
temperature increases sufficiently.
WARNING
Do not initiate a stationary regeneration in a
closed area like
regenerations must be undertaken outdoors
only.
WARNING
During stationary
temperature may reach up to 1200°F (650°C)
at the particulate
stationary regeneration, make sure that the
DPF outlet diffuser is clear of objects and that
no one is working near the DPF outlet diffuser.
WARNING
Hot surfaces. Keep yourself clear of all hot
Aftertreatment Device components, particularly
during and after
regeneration. Hot surfaces can cause serious
burns.
NOTE
STATIONARY REGENERATION
This process requires the vehicle to be parked
while the driver or a maintenance technician
initiates the regeneration process.
The DPF REGENERATION
illuminates to notify the driver of the need and
urgency of a manual stationary regeneration.
DPF REGENERATION telltale light
If stationary regeneration is not performed, this
telltale light will blink, indicating that a stationary
regeneration is required
stationary regeneration is still not performed,
a garage. Stationary
regeneration, exhaust
filter. Before initiating
active or stationary
telltale light
immediately.
"engine power derate and shutdown" sequence
may occur as per level 1 to level 4 sequence.
To initiate a stationary regeneration:
• Park the vehicle in a clear area, vehicle
speed must be 0 mph (0 km/h);
• Engine must be on normal idle and fully
warmed up (coolant temperature above
140°F/60°C);
• Apply
parking
transmission to neutral (N).
• Press the DID ENTER button and then get to
the DID Aftertreatment menu.
menu Request Parked REGEN and press
ENTER
regeneration.
The regeneration will begin. Turn off the air
conditioning to reduce engine load. The engine
idling speed will increase to 1600 rpm. Once the
regeneration is completed, the engine speed will
return to normal idle.
Voluntary
Regeneration
It is possible
regeneration at all time. To do so, set the ignition
key to the OFF position or get to the DID's
Aftertreatment menu, select Cancel REGEN and
press ENTER button to confirm. You can stop
regeneration simply by releasing the parking
brake. Use this procedure in order to move the
vehicle in a safe area.
If regeneration is interrupted, it is very important to
reinitiate the regeneration as soon as possible.

SELECTIVE CATALYTIC REDUCTION UNIT

Selective Catalytic
technology that uses Diesel Exhaust Fluid (DEF)
and a catalytic converter to reduce nitrogen
oxides (NOx) emissions.
SCR is an exhaust aftertreatment system that
injects small amount of DEF into the exhaust
gas between the DPF and the selective
reduction catalytic converter. DEF turns to
ammonia and carbon dioxide when heated. The
exhaust stream then passes over a catalyst, the
ammonia reacts with the NOx to form nitrogen
and water vapor.
The basic elements of the SCR system consist
If
of a 15.9 gallons (60 liters) DEF tank complete
with pump, lines and heating system, a dosing
Other Features
brakes and
button to confirm
Interruption of a
to interrupt a
Reduction (SCR)
5-5
set the
Select sub-
and initiate
Stationary
stationary
is a