American Power Conversion MX28B200 - Manual (Page 26)

Page 20 MX28B200/400 –48 VDC User’s Manual (990-9133)
3.11. Rectifier Module Installation
WARNING: Rectifier DC output circuits would be damaged if
battery were installed incorrectly. Before rectifier installation,
ensure proper battery polarity and that the battery is isolated
from the rest of the system
The rectifier modules are shipped in separate containers. Follow the procedure below to
install a rectifier module.
1) Remove the rectifier from its shipping container.
2) Remove any rectifier retaining screws from the shelf position where the rectifier is
to be installed.
3) Slide the rectifier module into the shelf between the guides until it is fully seated.
4) Fasten the rectifier in place with the rectifier retaining screw (included in literature
kit with product manual).
Since all adjustments are made from the system control unit, no rectifier adjustments are
necessary.
NOTE: All “FLOAT” – “BOOST/EQUALISE” switches (one is located on the front
of each rectifier in the system) must be set to “FLOAT” to allow the MX28B to
control the output voltage properly.
CAUTION: Rectifier fan inlet filters are available for dusty or
hostile environments. Failure to periodically check and clean
filters can lead to rectifier shutdown due to over temperature
and produce power plant failure.
3.12. Initial Power-Up and Checkout
Before initiating power-up and checkout, ensure that the following conditions exist:
1) Make sure that the external circuit breaker protecting the cables from the battery to
the power plant is turned OFF (the battery cables should be connected to the
power plant, but the battery should not be connected).
2) Make sure that all load circuit breakers are turned OFF (including the one feeding
the GMT fuses if the unit has the GMT fuse option).