Guardian Technologies 004702-0 Manual De Usuario

 10 

Read the rated wattage/amperage capacity of the gen-
erator on the generator data decal (see Section 1.1).

Applying electrical loads in excess of the unit’s rated 
capacity will cause the engine/generator to automati-
cally shut down.

To avoid overloading, add up the wattage of all con-
nected electrical lighting, appliance, tool and motor 
loads. This total should not be greater than the 
generator’s rated wattage capacity.

• Most lighting, appliance, tool and motor loads 

indicate their required watts on their nameplate or 
data plate. For light bulbs, simply note the wattage 
rating of the bulb.

•  If a load does not show its rated wattage, multiply 

that load’s rated VOLTS times AMPS to obtain 
WATTS.

•  Induction type motors (such as those that run the 

vehicle’s furnace fan, refrigerator, air conditioner, 
etc.) need about 2-1/2 times more watts of power 
for starting than for running (for a few seconds 
during motor starting). Be sure to allow for this 
when connecting electrical loads to the genera-
tor. First, figure the watts needed to start electric 
motors in the system. To that figure, add the run-
ning wattages of other items that will be operated 
by the generator.

•  Do not apply heavy electrical loads for the first two 

or three hours of operation.

This switch (Figure 2.3) has normally closed (N.C.) 
contacts that are held open by engine oil pressure 
during cranking and operating. Should oil pressure 
drop below a preset level, switch contacts close, and 
the engine automatically shuts down. The unit should 
not be restarted until oil is added.

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This switch (Figure 2.3), which has normally open 
(N.O.) contacts, is mounted near the oil filter. The 
contacts close if the temperature should exceed 
approximately 270º F (132º C) for gasoline models, 
and 284° F (140° C) for LP models, initiating an 
engine shutdown.

The Controller Circuit Board houses a field boost 
diode and resistor that are not part of the automatic 
choke circuit. These two components are part of 
a “field boost” circuit (Figure 2.4). During engine 
cranking only, a positive DC (battery) voltage is deliv-
ered through a diode, resistor, brushes, slip rings, 
and the generator rotor. Application of this voltage 
to the rotor “flashes the field” whenever it is started. 
Flashing of the field each time the generator starts 
makes sure that a sufficiently strong magnetic field 
is available to produce “pickup” voltage in the stator 
windings.

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