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Westinghouse Portable Power | 19
POWER OUTPUT AND DEMAND
The generator should not be run completely unloaded
for extended periods otherwise the engine may be
damaged. It is recommended that the generator should
always be operated with at least one-third of its rated
120-Volt AC power output. 120-Volt AC devices have
two dierent electric power demands that must be
taken into consideration, namely the running power and
the starting/peak power. Both are measured in Watts
(typically abbreviated as “W”).
The steady state continuous load is the running power
demand and this is often marked on the device near its
model number or serial number. Sometimes the device
might only be marked with its voltage (i.e. 120 V) and
current draw (e.g. 6 Amp or 6 A), in which case the
running power demand in Watts can be obtained by
multiplying the voltage times the current, e.g. 120 V
× 20 A = 2,400 W.
Simple resistive 120-Volt AC devices such as
incandescent bulbs, toasters, heaters, etc. have no extra
power demand when starting, and so their starting power
demands are the same as their running power demands.
More complex120-Volt AC devices containing inductive
or capacitive elements such as electric motors have a
momentary extra power demand when starting, which can
be up to seven times the running power demand or more.
Manufacturers of such devices rarely publish this starting
power demand and so it’s often necessary to estimate it.
A rule of thumb for devices tted with an electric motor is
to apply a starting power multiplier of
1.2 for small hand-held or portable devices and a value
of 3.5 for larger stationary devices. For example, a 900 W
angle grinder can be assumed to have a starting power
demand of at least 1.2 × 900 W, which equals 1,080 W.
Similarly, a 1,650 W air compressor can be assumed to
have a starting power demand of at least 3.5 × 1,650 W,
which equals 5,775 W.
To prevent overloading of the generator’s 120-Volt
AC system:
1. Add up the running power demand of all the 120-Volt
AC devices that will be connected to the generator
at one time. This total must not be greater than the
generator’s specied running power output.
2. Add up the running power demand again, but for
the largest motor-driven device use the value of its
starting power demand instead of its running power
demand. This total must not be greater than the
generator’s specied starting power output.
3. The total running power demand of all the devices
that will be connected to any one of the generator’s
outlets must not exceed the generator’s specied
running power output or 3,700 W, whichever is the
lesser.
TRANSPORTING THE GENERATOR
The generator should be stopped and both the fuel
control switch and fuel cap vent should be turned to the
OFF position before transporting the generator. Keep
the unit level during transport to minimize the possibility
of fuel leakage or, if possible, drain out the fuel prior to
transport.
If the generator has been operating, allow the unit to
cool down before loading it onto the transport vehicle.
The iGen4500’s wheels are only intended for ease of
moving the generator around by hand. The wheels are
not suitable for towing the generator either on or o-
road.
Use only the generator’s xed handle(s) for lifting the
unit or attaching any load restraints such as ropes or
tie-down straps. Do not attempt to lift or secure the
generator by holding onto any of its other components.
The iGen4500 is also equipped with an extendable
handle. To deploy it, push on the locking button and
pull on the handle until it’s fully extended. To stow it,
push on the locking button and push on the handle until
it’s fully retracted. Only extend or retract the handle
while the generator is stationary and resting on a
horizontal surface.
The extendable handle is intended for ease of wheeling
the generator around by hand. Do not use the
extendable handle to lift the generator entirely o the
ground, tow it or up-end it.
OPERATION
Locking Button
Handle Grip
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