Nortel Meridian 1 Replacement Manual page 114

Page 114 of 362
553-3001-520 Standard 16.00 April 2000
Replacing equipment
– Connect the #22 AWG red wire to the – SENS terminal on TB4.
d Connect the #22 AWG blue wire to the DCON terminal on TB4.
Incorrect wiring connections between a rectifier and the QBL15 can
cause serious system damage. Refer to Figure 10 and verify that all
wiring is properly connected before proceeding.
8 Reinstall the safety shield on TB3 and then install the rear cover on the
rectifier.
9 Make sure the AC BRKR switch on the rectifier is OFF.
10 Plug the AC power plug from the rectifier into the commercial power
source and then dress the power cord to the rack using plastic cable ties.
Adjusting equipment
Note: Do not adjust the over voltage shutdown (OV ADJ) potentiometer
on the front panel of replacement rectifiers. This potentiometer is
adjusted at the factory and does not require readjustment upon
installation into an existing power system.
Note: The following steps adjust the float voltage of the replacement
rectifier. This float voltage must be adjusted to match the float voltage
settings of all other system rectifiers to ensure proper load sharing.
1 At the QBL15, connect a voltmeter to the positive (+) and negative (–)
test points (located with the QPC188 Battery Monitor).
2 Set the AC BRKR switch on the replacement rectifier to ON.
3 Set the CB0 circuit breaker on just one Meridian 1 column to ON to
establish a minimum load.
4 Adjust the VOLT ADJ potentiometer on the front panel of the
replacement rectifier to obtain the desired float voltage reading,
± 100 mV dc.
5 Set the CB0 breaker on the Meridian 1 column to OFF and then set the
AC BRKR switch on the rectifier to OFF.
CAUTION