Ensure grid voltage and fan motor rated voltage matches BK54 main fan, with megger, check the motor winding insulation value FKZ main fan, should be more than 50MΩ before use. Before the fan is running, be sure that the blade joins fastening, connecting the impeller and shaft not loose. FKZ main fan | Laiwu main fan | Blower provided by Zibo Zibo Fan Factory Limited. Zibo Blower Factory Co., Ltd. (www.zibo-fengji.com) strong, credible, Shandong Zibo fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Zibo Blower and you hand into the brilliant, for a better future!