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MX28B400 +24 VDC User’s Manual Page 18
4) Apply ac Power. Turn on the circuit breakers that supply ac power to the rectifiers in the
MX28B power plant. The main screen should appear on the control unit display (see
Figure 4.6-1). The display on the control unit is a 2-lines by 16-characters display. The
cursor cycles below the characters of the active selection on the display. Information
shown in the second line of Figure 4.6-1 that extends beyond 16 characters (to the right
of the “S” in “ALARMS”) can viewed on the control unit display by using the scrolling
controls (refer to Section 4.6 for operation of the control unit).
NOTE: When ac power is initially applied, there is a 60-second period during which no alarms
are reported.
WARNING: The power plant is supplied from a nominal 220Vac, 50/60 Hz
source. Keep the ac input enclosure cover in place when the system is
operational or energized
.
3.11. System Parameters Verification/Adjustment
The MX28B system control unit is delivered with pre-programmed parameter default settings. A
complete listing and description of all system configuration parameters as well as displayable
system status and information is provided in Section 4.6. Users should read Section 4.1 to
gain an understanding of and how to use the operational features provided by the MX28B power
plant. As a minimum, the following parameters should be verified and adjusted, if required,
before connecting batteries or loads to the power plant:
1) Battery Float Voltage - default = +27.00Vdc (Check the manufacturer’s recommendation
for the batteries being used in the system.)
2) Battery Maximum Recharge Rate - default = 12A.
3) System Voltage - measurement ≅ +27.00Vdc (This is a measurement by the system of
the output bus voltage.)
4) LVD Option - default = “Enable” (If the MX28B does not have an LVD installed, this
should be changed to “Disable”.)
5) Rectifier Information - Check the rectifier information displays to verify that all rectifiers
installed can be viewed on the control unit display and that no rectifier alarms are active.
Section 4.6 provides location information for these parameters and how to make changes if
required.