Nanni Q2400 Series, Руководство пользователя

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24
S03 FLUIDS
MINIMIZING THE EFFECT OF COLD WEATH-
ER ON DIESEL ENGINES
NANNI diesel engines are designed to operate effectively
in cold weather.
However, for effective starting and cold-weather opera-
tion, a little extra care is necessary. The following infor -
mation outlines steps that can minimize the effect that
cold weather may have on starting and operation of your
engine. See your NANNI dealer for additional information
and local availability of cold-weather aids.
Use Winter Grade Fuel
When temperatures fall below 0°C (32°F), winter grade fuel
(No. 1-D in North America) is best suited for cold-weather
operation. Winter grade fuel has a lower cloud point and
a lower pour point.
Cloud point is the temperature at which wax begins to
form in the fuel. This wax causes fuel filters to plug. Pour
point is the lowest temperature at which movement of the
fuel is observed.
NOTE!
On average, winter grade diesel fuel has a lower Btu (heat
content) rating. Using winter grade fuel may reduce pow-
er and fuel efficiency, but should not cause any other en -
gine performance effects. Check the grade of fuel being
used before troubleshooting for low-power complaints in
cold-weather operation.
Air Intake Heater
An air intake heater is an available equipment for some
engines to aid cold weather starting.
Ether
An ether port on the intake is available to aid cold weather
starting.
CAUTION !
Ether is highly flammable and not recommended by NAN-
NI. Do not use ether when starting an engine equipped
with glow plugs or an air intake heater.
Coolant Heater
An engine block heater (coolant heater) is an available
option to aid cold weather starting.
Seasonal Viscosity Oil and Proper Coolant Concentra-
tion
Use seasonal grade viscosity engine oil based on the ex-
pected air temperature range between oil changes and a
proper concentration of low silicate antifreeze as recom-
mended. (See DIESEL ENGINE OIL and ENGINE COOLANT
requirements in this section.)
Biodiesel
Use B5 or lower blends at temperatures below 0°C (32°F).
Use only winter grade petroleum diesel fuel at tempera-
tures below -10°C (14°F).
Winter-fronts
Use of fabric, cardboard, or solid winter-fronts is not rec-
ommended with any NANNI engine. Their use can result
in excessive engine coolant, oil, and charge air tempera-
tures. This can lead to reduced engine life, loss of power
and poor fuel economy. Winter-fronts may also put ab-
normal stress on fan and fan drive components potential-
ly causing premature failures.
If winter-fronts are used, they should never totally close
off the grill frontal area. Approximately 25% area in the
center of the grill should remain open at all times. At no
time should the air blockage device be applied directly to
the radiator core.