18
OPM-145/D
OPERATING CONDITIONS
NORMAL OPERATION
This generator set is designed to be operated under load
and the accumulation of operating hours without load can
cause unburned fuel from the combustion chamber to build
up in the exhaust system. This is called wet stacking and can
result in fouled injectors and carbon buildup in the exhaust
pipes, turbo and exhaust valves.
To avoid wet stacking the operating temperatures must be
kept high enough. The best way to do this is to ensure that
the generator set has adequate load during operation. If
the engine is cold at start up run it for 2-5 minutes and then
load the generator. Idling longer than this is more likely to
damage the engine than extend its life
If the generator application is for emergency standby the
generator should be exercised at least monthly ideally
under load. Load banking the generator at least annually
will help keep the engine in good condition.
HARSH ENVIRONMENTS
OPERATIONS
Some applications require the generator to operate in
harsh environments. One of the most common hazards are
extremely dusty conditions. In harsh conditions it is often
necessary to take additional steps to keep the equipment
clean and operating at its peak. Maintenance intervals on
lubricant and filter changes may need to be shortened. An
oil quality testing program can also provide early warnings
or oil degradation. Efforts may need to be made to reduce
the amount of dust and debris entering the housing and
generator components.
COLD WEATHER OPERATIONS
The minimum natural starting temperature with glow plugs
is -5°F. The minimum starting temperature with glow plugs
and block heater is -13°F.
The degree of fluidity of the diesel oil may be reduced at
low temperatures due to the separation of the paraffin. This
results in the filters becoming clogged.
The ASTM D975 specifications distinguish different classes
of diesel fuel, identifying the characteristics of those that are
best adapted to low temperatures.
Oil companies must respect these standards, which provide
for the distribution of fuels adapted to the climatic and
geographical conditions in various countries.
This generator-engine set needs load and should not idle
for long periods of time.
If the generator set will be run in extremely cold
environments it may be beneficial to provide means to
reduce air circulation to increase the temperature of the
enclosure.
Inspect the hoses regularly during cold operation looking
for signs of freezing. If the line freezes it will cause pressure
to build in the crankcase and may cause an engine seal
failure. If the engine operates below optimal temperatures
for long periods of time damage may occur.
