8
FUEL SYSTEM REQUIREMENTS AND RECOMMENDATIONS
Diesel Fuel System
The manufacturer recommends the use of No. 2D diesel fuel when
temperatures are above freezing and No. 1D diesel fuel when tem-
peratures drop below freezing. Diesel fuel must meet the following
requirements:
1. Beginning October 1, 2007, owners and operators that use
diesel fuel must use diesel fuel that meets:
A. Sulfur content of 500 parts per million (ppm) maximum.
B. Cetane index or aromatic content as follows:
• A minimum cetane index of 40 or;
• A maximum aromatic content of 35 volume percent.
2. Beginning October 1, 2010, owners and operators that use
diesel fuel must use diesel fuel that meets:
A. Sulfur content of 15 parts per million (ppm) maximum.
B. Cetane index or aromatic content as follows:
• A minimum cetane index of 40 or;
• A maximum aromatic content of 35 volume percent.
Gaseous Fuel System
Gas supply volume to the connection point on the generator must
be sufficient to ensure that the supply gas pressure never falls
below the minimum pressure recommended for the unit when
operating at its full load capacity.
Check the specification sheet for the unit for the minimum and
maximum pressure requirement. The supply gas pressure is
always measured at the inlet of the unit mounted regulator.
GENERATOR AND LOAD
COMPATIBILITY
The generator must be fully compatible with the rated voltage,
phase and frequency of the connected electrical loads. The gen-
erator, connected electrical devices, or both, can be damaged if
voltage, phase and frequency are not compatible.
NOTE:
This manual assumes that the stationary emergency generator
has been properly selected, installed and interconnected by a
competent, qualified electrician or installation contractor. Once
the installation is complete, do nothing that may result in non-
compatibility between the generator and connected electrical
loads.
STARTING AIDS
The stationary emergency generator may be equipped with one or
more starting aids that serve to provide quicker, easier starts under
varying climactic conditions.
This generator may have been mounted with (a) an engine coolant
heater, (b) an engine oil heater, (c) a battery warmer or (d) a bat-
tery charger. These aids are powered by a normal (utility) power
source during non-operating periods.
ENGINE COOLANT HEATERS
If the unit is equipped with an engine coolant (block) heater, it is
powered by a circuit normally fed by the utility power supply. This
heats the engine coolant when the unit is not operating. This action
keeps the engine warm even in cold weather, helping to ensure
quicker starts.
BATTERY CHARGERS
There are two types of battery chargers available: 2.5-amp and
10-amp (nine-amp UL) rated. The 2.5-amp charger is 12 VDC
only. The 10-amp is available as 12 VDC or 24 VDC, as appropri-
ate for the engine’s DC system voltage. These chargers are UL
component recognized for use on these generator sets.
Both of the chargers are fully automatic float types and are fully
fuse protected (input and output). They have automatic current
limiting to reduce risk of overcharging, and have automatic main-
tenance of charge voltage. Therefore, they can be connected to the
batteries continuously.
The chargers require the connection of a battery in order to turn
on. The battery provides boost voltage for the charger, so a com-
pletely dead battery will not allow the charger to operate. The boost
required is approximately nine to 11 volts for a 12 VDC system
and 18 to 22 volts for a 24 VDC system. If the battery is below the
boost voltage, it needs to be replaced.
They are not water resistant, so they must be installed within a rain
resistant enclosure.
STATIONARY EMERGENCY
GENERATOR INSTALLATION
Connecting this generator to an electrical
system normally supplied by an electric util-
ity shall be by means of a transfer switch
(such as the “GTS” type transfer switch),
so as to isolate the electric system from the
utility distribution system when the genera-
tor is operating. Failure to isolate the electric
system by these means will result in damage
to the generator and may also result in injury
or death to utility workers due to backfeed of
electrical energy.
If an open bottom is used, the engine-gener-
ator is to be installed over non-combustible
materials and should be located such that
combustible materials are not capable of
accumulating under the generator set.
Installation
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