OfficeServ 7400 INSTALLATIONTECHNICAL MANUAL PART 4 MAY 20104.2Observe the following precautions when installing batteries: Make sure the batteries you install conform to local building, fire and safety codes. Somebattery types emit hydrogen gas during the charging state and may require venting tofresh air. Do not place batteries directly on a concrete floor. This causes them to discharge veryquickly. Follow the battery manufacturer’s recommended installation and maintenanceprocedures.PROCEDURE FOR CONNECTING EXTERNAL BATTERYThe procedure for using a battery cable to connect an external battery to the OfficeServ 7400system is as follows:1) Prepare the battery cable that was provided with the OfficeServ 7400 system. The batterycable consists of a red line and a blue line, and at the end of each line, GND (red line), -48VDC (blue line) are labeled. The other part of battery cable has a connector for thebattery socket of OfficeServ 7400 system.2) Connect the red line (GND) of the battery cable to the (+) terminal, and the blue line (-48 VDC) to the (-) terminal of the battery. Then, connect the other end of the battery cableto the external battery socket on the rear panel of the OfficeServ 7400 cabinet.Figure 4.1 Connecting an External Battery (1)(+)(-)