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Figure 9 -“Set Exercise” Switch ENGINE HEATER Your Generac standby generator comes equipped with a block heater (Figure 10), similar to the block heaters used in automotive applications. Figure 10 -Engine Block Heater Refer to applicable wiring diagram(s) and electrical schematic(s) at back of manual for wiring connections. Customer supplies a 120V 15A Utility fed circuit for the block heater. 14 Generac® Power Systems, Inc. Generac® Power Systems, Inc. 15 MAINTENANCE PERFORMED BY AUTHORIZED SER