Larson Electronics PDU-ATS Series User Manual

INSTALLATION (continued)GREEN operateRED this switchGREEN REDobservethese lightsFigure 1-12. Standard controls and indicators.3 – Electrical OperationThis procedure will check the electrical operation of theAutomatic Transfer Switch. See Figure 1–12.Be sure to close the enclosure doorbefore proceeding to prevent personalinjury in case of electrical system fault.Transfer TestBoth normal and emergency sources must be availableand the emergency source generator (if used) must becapable of being started in this procedure.Perform steps 1 through 5 at the right. Observe thestatus lights.Q Black square means light is on.S White square means light is off.This completes the Functional Test of the ATS.1The Transfer Switch ConnectedTo Normal and Normal SourceAccepted lights should be on.2Turn and hold Transfer Controlswitch clockwise to TransferTest until the engine startsand runs (within 15 sec.).Emergency Source Acceptedlight should come on.3Transfer switch will operate tothe Emergency position afterFeature 2B time delay. TheTransfer Switch Connected ToEmergency light should comeon and Load Connected to Nor-mal light goes off.4Transfer switch will operateback to Normal position afterFeature 3A time delay. For im-mediate retransfer turn TransferControl counterclockwise toRetransfer Delay Bypass. TheTransfer Switch Connected ToNormal light should come on;Transfer Switch Connected toEmergency light should go off.5The engine–generator will stopafter the Feature 2E time delay(unloaded running engine cool-down). The Emergency SourceAccepted light should go off.Larson Electronics, LLC Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com 7 of 9