241
2008 IMPERIAL
CHASSIS INFORMATION — 10
Block Heat:
The switch on the dash
labeled Block Heat operates the
receptacle for the block heater
cord. The block heater is rated
between 850 and 1500 watts,
depending on engine size. For
ef
fi
ciency hook to shore power,
or plug the block heater
cord into a separate power
cord rated for 15 Amps
and a GFCI protected
outlet rated at 20 Amps.
The engine may require
several hours of pre-
heating before starting. It
is recommended to start
preheating the engine the
night before departure.
To Use the Block Heater:
Hook to shore power and plug the
block heater cord into the block heater
receptacle (both are located in the engine
compartment).
Turn on the Block Heat switch, located
on the dash.
Aqua-Hot (Optional) Engine Preheat:
The diesel burner inside the optional Aqua-
Hot heats an internal engine coolant loop. When
the Aqua-Hot Engine Preheat switch is turned
on, an engine coolant pump inside the Aqua-Hot
circulates heated coolant through the engine.
The time it takes for the Aqua-Hot to preheat
the engine depends on ambient temperature.
Allow at least three hours of preheating before
attempting to start the engine.
To Use the Engine Preheat System:
Press the Aqua-Hot switch
at the kitchen to turn the
system on.
Turn the Aqua-Hot Engine
Preheat switch at the dash
to the
ON
position. This
activates the engine pump
inside the Aqua-Hot.
Tips:
1. When operating below 32º F., the
Aqua-Hot and/or block heater preheat
can enhance engine starting by easing
cranking and helping to prevent
engine mis
fi
re and white smoke during
starting.
2. Always follow the recommended oil,
fuel, and coolant speci
fi
cations as
outlined in the OEM Engine Manual.
Proper oil viscosity and coolant
concentration eases engine starting and
helps to avoid engine damage.
3. Allow the engine to idle until it
suf
fi
ciently warms for operation.
Utilize the fast idle feature to quicken
the process. Wait to operate the
motorhome for at least three minutes
or until the coolant temperature begins
to rise.
4. Check the air inlet and
fi
lter daily, or
as necessary, when driving in snow
conditions.
5. The demand on batteries increase
during winter; check and service the
batteries frequently to help ensure
trouble-free starts.
6. Start out slowly with the motorhome
to allow the transmission and axle
lubricants time to circulate and warm
before putting them under full load.
WARNING:
Use of ether starting fluids may cause an
explosion upon grid heater activation.
ENGINE OIL
Cummins Engine Requirements:
Maintenance guidelines and requirements
are located in the Cummins Operation &
Maintenance Manual. These recommendations
for the engine will extend engine life and
improve performance, resulting in cost ef
fi
cient
operations. A good maintenance schedule begins
with a daily awareness of the engine and its
various systems.
A high grade 15W-40 multi-viscosity
heavy duty lubricating oil meeting American
Petroleum Institute (API) speci
fi
cation
CJ-4
is
recommended. A critical factor in maintaining
engine performance and durability is the use of
high grade, multigrade lubricating oil and strict
adherence to the maintenance service intervals.
A straight weight or monograde lubricating oil
is not recommended. Shortened drain intervals
may be required as determined by a close
monitoring of the lubricating oil condition by
means of an oil sampling program. The use
of oil analysis to extend drain interval is not
recommended. There are numerous variables
which is the basis of the recommendation.
090480
080375L
Located on
the dash
080375r
