PX3TS Transfer Switch Quick Setup Guide 3QSG-PX3TS-0D-v3.1-E 255-80-0032-00 RoHS4. Fasten front mounting ears to the rack using your ownfasteners.To mount a PX3TS device which is short:1. Attach a rackmount bracket to both sides of the PX3TSwith the provided screws. For a 1U model, the totalnumber and locations of screw holes are different from thefollowing 2U diagram.2. Insert the cable-support bar into rackmount brackets.3. Secure with the provided end cap screws.4. On a 2U model, repeat the above steps to install anothercable-support bar.5. Fasten the rackmount brackets' ears to the rack using yourown fasteners.QS RuleInlet and Outlet Power ConnectionsThe PX3TS connects to two different, but identically rated,branch circuits.The PX3TS will operate when the branch circuit voltages areout of phase, but works most reliably and fastest when inphase. The front panel Phase Sync lamp lights if inlets are outof phase.Connecting Power and EquipmentYour PX3TS may have fuses and/or circuit breakers. Verifythat all are firmly seated or set to ON before connectingpower.The PX3TS inlets are labeled INLET 1 (I1) and INLET 2 (I2).INLET 1 is the factory default preferred inlet, and INLET 2 isthe factory default alternate inlet.Tip: You can switch preferred and alternate inlets if needed.See Manual Transfer (on page 5).To make power connections:1. Connect PX3TS inlets to branch circuits.2. Connect loads to PX3TS outlets.3. Apply power to branch circuits.