Manitowoc SM Series Installation, Operation And Maintenance Manual

Part Number 000001590 Rev03 11/19 11Section 2 InstallationElectrical ServicePrepare electrical circuit before installation of your icemachine. Installation requires a grounded (three-prong),polarized receptacle with a separate fuse/circuit breaker inan electrical service box.VOLTAGEThe maximum allowable voltage variation is ±10% of therated voltage at ice machine start-up (when the electricalload is highest).All electrical work, including wire routing and grounding,must conform to local, state and national electrical codes.The following precautions must be observed:• The ice machine must be grounded.• A separate fuse/circuit breaker must be provided for eachice machine.• The maximum allowable voltage variation is +/-10%of the rated voltage at ice machine start-up (when theelectrical load is highest).• Check all green ground screws in the control box andverify they are tight before starting the ice machine.• Manitowoc’s recommended minimum wire size is #14 forless than 100’ or #12 for more than 100’ to 200’ (solidcopper conductor only). The recommended breaker is15 amp. Local or state electrical code, length of run ormaterials used, can increase the minimum wire gaugerequired. A qualified electrician must determine theproper wire size, although #14 is the minimum sizeallowed.• Incorrect polarity can lead to erratic ice machineoperation and a safety issue.MINIMUM CIRCUIT AMPACITYThe minimum circuit ampacity is used to help select the wiresize of the electrical supply. (Minimum circuit ampacity is notthe ice machine’s running amp load.)ELECTRIC REQUIREMENTSRefer to Ice Machine Model/Serial Plate for voltage/amperage specifications.Maximum breaker size & minimum circuit amperage chartModel Voltage PhaseCycleAir-CooledMaximumFuse circuitBreakerMinimumCircuitAmpacitySM50A 115/1/60 15 4.1GFCI REQUIREMENTSIf GFCI (ground fault circuit interrupter) is required by localelectrical code, it must be breaker type.