Tiffin Motorhomes Allegro Bus 2011, Owner'S Manual

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E L E C T R I C A L F E A T U R E S
7-2
General Information
There are two electrical systems in your Allegro Bus motor home—these are the 12-volt DC (12 VDC) system
and the 120-volt AC (120 VAC) system. Most standard appliances require the 120 VAC system, while the
majority of the lighting systems used in the Allegro Bus use the 12 VDC system.
The electrical power for the 12 VDC system is supplied by the batteries of the Allegro Bus; those batteries are,
in turn, charged by a power converter. The electrical power for the 120 VAC is supplied either by the electrical
power hookup cord when the Allegro Bus is connected to an external power source or when the on-board
electrical generator is in operation.
If installed, the optional inverter can also supply 120 VAC electrical power (to limited outlets and limited
appliances)—the inverter transforms the 12 VDC electrical power from the batteries into the 120 VAC
electrical power for the basic appliances.
Caution
Failure to turn off the 120 VAC appliances when starting or stopping the generator may
damage the transfer switch and/or electrical appliances.
To connect the Allegro Bus to an external source of 120 VAC electrical power, it is first recommended that all
of the circuit breakers are in the “off” position—this is done to prevent any power surge upon connecting the
motor home to the external power source.
Then unwind the power cord from the electrical compartment located in the compartment behind the driver’s-
side rear tires. The standard, flexible, power cord supplied with the Allegro Bus is designed to handle up to 50
amperes.
Make sure that the pins in the male end of the plug are oriented correctly so that they match the power cable
and that they are in good condition (i.e., aren’t bent or damaged). If there is a circuit breaker switch at the
“plug” end of the power cord, that breaker should be turned “off” before making the connection. Insert the
plug into the mating outlet and then turn the circuit breaker “on.”
Close and lock the electrical compartment door to protect the contents and to keep them clean and dry. Close
the cover on the power box, if so equipped, to avoid an unintentional disconnection and to keep the contents
clean and dry. Then switch the main breaker to the “on” position.
When properly connected, the 120 VAC system provides power to all the 120 VAC circuits and outlets when
the main breaker is turned “on.”