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Three Speed Wiring Instruction   1. Wiring Diagram: N: COMMONLC: LOW SPEEDLB: MIDDLE SPEEDLA: HIGH SPEED   2. Wiring with REB speed control: Remark:To avoid influencing the fan service life,the optimal adjustable speed range is from 70%~100%. 3. Switch control: N: COMMONLC: LOW SPEEDLB: MIDDLE SPEEDLA: HIGH SPEED

Two Speeds Inline Fan Wiring Instruction 1. Wiring Diagram: N: COMMONLB: LOW SPEEDLA: HIGH SPEED 2. Wiring with REB Speed Control: Remark:To avoid influencing the fan service life,the optimal adjustable speed range is from 70% to 100%. 3. Switch Control: N: COMMONLB: LOW SPEEDLA: HIGH SPEEDC: SWITCH     How to Reduce Inline Fans Noise?