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ELECTRICAL FIELD CONNECTIONS <br />FLUID TEMPERATURE CONTROL DIRECT DRIVE DRYCOOLERS <br />Factory wired to 24 <br />Class 2 control circui <br />Unit Alarm Connection <br />Field supplied 24V. <br />Class 2 wiring to <br />terminals "24 & 50" <br />to indicate <br />"Standby Glycol <br />Pump On". <br />(Supplied with dua <br />pump controls <br />only.) <br />I <br />Control interlock <br />Field supplied <br />Class 2 wiring to <br />interlock drycooler <br />24V controls to <br />Liebert room unit <br />(Not required on <br />CSU 3000). 7/8 in. <br />(22.2mm) diameter <br />hole provided in <br />bottom of electric box, <br />Flow switch connection <br />(Dual pump controls only) <br />Field supplied 24V Class 2 <br />wiring from terminals 74 + <br />77 to field mounted flow <br />switch. <br />Electric service connection <br />terminals for power supply to <br />pumps when pump controls <br />are factory supplied. Dual <br />pump connection shown. 7/8 <br />in. (22.2mm) diameter <br />knockouts provided in bottom <br />of electric box. <br />Factory wired to components <br />on electric panel <br />0 <br />Electrical service connection <br />terminals when factory <br />disconnect is not supplied. <br />Fuse block supplied on <br />DNT drycoolers. <br />Pump fuses & overload <br />heaters (shipped with <br />standard pump packages) <br />are to be field <br />installed in pump fuse <br />block(s) and starter(s). <br />Earth ground bar (50 HZ). <br />Connection terminals with factory <br />ground from each high voltage <br />component for field supplied <br />earth grounding wire. <br />Earth ground connection (60 HZ). <br />Connection terminal for field <br />supplied earth grounding wire. <br />Electric service entrance. <br />A 7/8 in (22.2mm) diameter hole <br />in a 1 1/8 in (28.6mm) knockout <br />provided in bottom of electric <br />box. <br />0 <br />Electric service connection <br />terminals when factory <br />disconnect is supplied. <br />Factory installed <br />disconnect switch <br />(optional). <br />Electric service. <br />not by Liebert. <br />(Field wired to Liebert <br />CSU 3000 unit. <br />Interconnecting wiring <br />not by Liebert). <br />NOTE: Refer to specification sheet for full load amp. and wire size amp. ratings. <br />DPN000276 <br />REV 08/07 <br />REV 1 <br />