Nortel SONET AccessNode User Manual page 186

9-2 Replacing the low-voltage disconnect unit
Warnings and cautions
Prior to performing any LVD replacement procedures, read each warning
carefully. Important battery and rectifier information is presented here.
AccessNode P0904244 Issue 1.0
DANGER
Risk of fire
Remove all paper and any other combustible materials
from inside the cabinet before the cabinet is powered
up. Failure to comply with this warning could result in
a fire.
CAUTION
Procedure sequence
Perform the steps in the order shown because the
sequence is critical.
CAUTION
DC voltage output levels testing
The dc voltage output level from each rectifier module
must be tested and adjusted according to Nortel
Networks recommended float voltages for the
following battery manufacturer: Johnson Control 12V,
–54.50 ±0.10 V dc.
Note: These ranges are subject to change without
notice. For other batteries, see the manufacturer's
specifications.
CAUTION
DC input voltage specifications
The input voltage specifications require that the dc
input to the BIP does not exceed –56.0 V dc. Set high
voltage shutdown to –56.0 V dc.