Blue Bird Coachworks 450 LXi, Owner'S Manual

Page: 81 / 684

4-3 Inverter
450 LXi Owner Manual
~ 4-3-2 ~
Rev. “C”
4-3.2.2 System Features
Inverter
The inverter consists of a true sine wave inverter that supplies power when AC loads are applied. This model develops 3600
watts of continuous power. Using TruSine
®
technology, a very high quality sine wave is produced. Total harmonic distortion
(THD) is less than 4.0 percent.
Battery Charger with Automatic Power Management
The high effi ciency, multi-stage battery charger allows automatic charging of fl ooded lead acid and gel type batteries. The
effi cient 0.85 power factor or PF, compared to typical 0.59PF on triac plus type chargers, allows full charger output from a
30-amp AC source. The system’s Bulk, Absorption, and Float charge cycle quickly charges and maintains the battery bank.
An Equalization charge cycle is available for fl ooded lead acid battery maintenance. In addition, there is an optional battery
temperature sensor to reduce battery fl oat voltage as temperature increases above 25º Celsius.
Automatic Power Management (APM) monitors the AC Input current and will reduce the battery charger output as needed to
keep the AC input current below the preset APM Limit.
GenStart Contact
The GenStart feature provides a start/stop signal to control an automatic generator. The start/stop signal consists of a
contact closure to start the GenStart based on battery voltage of 12.3 (24.6) VDC. The GenStart turns off when the battery
charging current falls below 10 amps.
Low Battery or Fan On Contact
The Low Battery contact allows remote monitoring of the Inverter’s battery status. The contact will close when battery voltage
falls below 11.0 (22.0) volts. This will alert the user to take appropriate measures to avoid shutdown of the Inverter at 10.5
(21.0) VDC. The SP00172 offers a Fan On contact instead of the Low Battery contact for turning on an external fan or blower
when the ITC’s fan is on.
Remote Power Switch
This loop between Options Terminal 7 and 8 (left side of Options Terminal) allow remote control of the system On/Off. Tying
these two terminals together or optionally, tying the terminal 7 (Remote Switch) to battery ground applies power to the unit.
NOTE: The Front Panel switch will always overrule the remote switch in terms of disabling the unit.
System Control
The ITC contains a System ON/OFF Switch located in the front of the ITC. This switch is used to turn the control power ON and
OFF. This power switch also has a break out loop for a series switch that can be placed in a remote location from the unit (See
Remote Power Switch above). A control microprocessor provides a variety of protection interlocks, system fault detection/
reporting,recovery, storage of system data parameters, and high-speed data communications to the ITC Control/Display Unit.
This Control/Display Unit also has individual on/off switches for independent Inverter and Charger control. The ITC will protect
itself in the event of any overload, over temperature, high or low battery voltage condition.
ITC Control/Display Unit
The ITC Control/Display Unit is a user interface that is connected to the ITC Control Board via a 6-wire modular cable. This
Control/Display unit can be an integral part of the Inverter or can be removed and mounted in a remote area to allowing
remote system operation. Two of these units can talk to the System Control Board one display would be confi gured as a
Master, and the other as Slave. The confi guration switches on top of the Master allow programming of the Charger current,
Automatic Power Management and battery type settings.
NOTE: It should be noted that if the Control Display unit is taken out of the front of the unit, the cover
plate (Vanner Part #D011339) must be installed in it’s place to insure that debris does not enter the unit
through the opening and to maintain proper airfl ow through the unit.