Installation
Main Unit Power Wiring
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to disconnect power before servicing could result in death or serious injury.
Table 7 lists the field connection wire ranges for both the main power terminal block 1TB1 and the optional main power disconnect switch 1S1. The unit electrical data is listed in Table 8. The electrical service must be protected from over current and short circuit conditions in accordance with NEC requirements. Protection devices must be sized according to the electrical data on the nameplate. Refer to the “Power Wire Sizing & Protection Device Equations”, for determining;
a.the appropriate electrical service wire size based on “Minimum Circuit Ampacity” (MCA),
b.the “Maximum Over current Protection” (MOP) device.
c.the “Recommended Dual Element fuse size” (RDE).
1.If the unit is not equipped with an optional factory installed nonfused disconnect switch, a field supplied disconnect switch must be installed at or near the unit in accordance with the National Electrical Code (NEC latest edition). Refer to the “Power Wire Sizing & Protection Device Equations” (DSS calculation), for determining the correct size.
2.Complete the unit’s power wiring connections onto either the main terminal block 1TB1, or the factory mounted nonfused disconnect switch 1S1, inside the unit control panel. Refer to the customer connection diagram that shipped with the unit for specific termination points.
3.Provide proper grounding for the unit in accordance with local and national codes.
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