1检查风机底座必须牢固，电机、电机支架等部分螺栓必须锁紧；

Make sure the blower base fastness and tighten all bolts.

2风机进风口必须清洁，排除任何杂物，并安装进口消音器，锁紧；

Ensure no foreign matters stay on air inlet, install inlet silencer and tighten.

3检查三角带松紧程度，皮带轮确保在一条直线上；

Check V-belts tightness and ensure a pair of pulleys on a straight line.

4电机转向根据风机要求调好，禁止风机逆转；

Adjust motor rotation direction, ensure no reversion.

5检查油箱有无润滑油（N220中负荷工业齿轮油），风机静止状态下油位不要高于油窗中心位置；若高于中心，多余的油会从墙板散热孔溢出。

Check if there’s lubricating oil in oil tank(N220 Industrial middle load gear oil). Oil level should stay below the center of oil window when the blower is static. Or, surplus oil will overflow from ventilation holes on side plates.

6确保出风口管道畅通无阻(单向阀的方向要正确，闸阀、蝶阀等要打开)，禁止风机带负荷起动；

Ensure outlet is unobstructed (Check valve with correct direction, keep gate valve, butterfly valve open), and forbid blower overload operation.

7管道各部分安装正确（详情请参阅罗茨风机、真空泵使用说明书）,风口、弹性接头、进、出口消音器、单向阀，连接牢固；

Check pipes are installed correctly (Please refer to roots blower/vacuum pump operation manual)and ensure the connections (air vent,flexible joint, inlet&outlet silencers, check valve)are fastness.

8一切就绪，开机前先用手轻轻转动皮带轮，确保风机轻轻转动，如有异物请立即排出，方可开机。

Rotate the pulley by hand before starting, to confirm no foreign matters is inside, then start up.

9 压力表的注意事项：首先确保压力表顶端的排气口通畅。开机前务必先将压力表开关处于打开状态，以免造成压力表的损坏。

Pressure Gauge NOTICE: Ensure air vent which is on top of pressure gauge is unobstructed. Meanwhile, keep gauge switch be open when start up blower, in case pressure gauge damages.

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