Blue Bird Coachworks 450 LXi, Owner'S Manual

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450 LXi Owner Manual 4-3 Inverter
Rev. “C”
~ 4-3-1 ~
4-3 Inverter
The 450 LXi is equipped with a Vanner ITC-Series inverter/charger system. This is a very important system within the coach.
This system can pull power out of 12-volt batteries and convert it to 120 VAC to run appliances. It can also can pull 120
VAC power and convert it to 12 volt as needed to change the house batteries when connected to 120 VAC shore power or
generator. Lights on the motor home use 12 volt and appliances use 120. This is useful when you are some place that does
not have plug-ins or you cannot run the generator for some reason. For example, maybe the park you are in has rules that
state no running generator after a certain time; this is where your inverter would come in handy.
4-3.1 Inverter Overview
An inverter converts DC electrical power into AC power. This power can be used to operate various AC-driven appliances.
The most common battery systems are 12 or 24 volt. Some systems, however, operate on higher voltages such as 32, 36,
48, or 120 volts. The most common inverter AC output power is 120 volts at a frequency of 60 Hz, although some inverters
are designed to produce 240 volts, or both 120 and 240 volts at 60 Hz. Because some countries use power of different
voltage and frequency (e.g. 230 volts at 50 Hz), inverters are available to conform to these requirements.
Inverters use electronic circuits to switch DC input power at the required frequency, such as 60 Hz. This “switched” DC
resembles AC power, and is then stepped up in voltage through a transformer. The result is a modifi ed sine wave AC output of
the required voltage and frequency that can power AC-driven equipment.
4-3.2 System Features and Specifi cations
4-3.2.1 General Description
The ITC-Series system consists of a DC to AC true sine wave inverter, a battery charger, an automatic AC transfer switch, and a
microprocessor based controller. An important feature of this system is the ITC-Series Control/Display Unit user interface.
ITC Series Inverter System
Figure 4-3-1 - System Diagram