1、根据空调平面图了解新风管、回风管、送风管的布局及走向，做出合理的施工预案。

1, according to the air conditioning plan to understand the layout and direction of the new wind pipe, air return pipe, air supply pipe, and make a reasonable construction plan.

2、将整个风管系统做一个完善的规划，在尽量少开口的前提下，分成若干操作段。

2, make a perfect plan for the whole wind pipe system, and divide into several operating sections on the premise of minimizing the opening.

3、有效利用我公司设备结合现场实际情况选定操作段。

3, effective use of our company equipment combined with the actual situation selected operation section.

4、选定吸尘风口和清洗风口。

4, select the dust tuyere and clean the tuyere.

选取风口的原则是：a、方便施工 b、尽量利用风管系统现有开口，例如送、回风口。

The principle of selecting the tuyere is: A, convenient construction of B, and making use of the existing openings of the wind pipe system as far as possible, for example, sending and returning the air vent.

5、在风管中开孔

5. Opening the hole in the wind pipe

（1） 用裁纸刀将保温层切下500×400毫米的开口（长500宽400）。

(1) cut the insulation layer by a paper cutter and cut down the opening of the 500 * 400 millimeter (400 length, 500 width).

（2） 在风管的表面划出φ300毫米的印记,以备后用。

(2) a mark of about 300 millimeters is made on the surface of the wind pipe for subsequent use.

（3） 用电钻在选定区域边沿开孔。

(3) use the electric drill to open the hole in the selected area.

（4） 用电剪刀裁剪开口。

(4) cut the opening with an electric scissors.

6、将气囊塞入不清洗的一端，以便充分隔离清洗区和非清洗区，避免二次污染。

6, the air bag is stuffed into the non cleaning end so that the cleaning area and the non cleaning area can be fully isolated to avoid the two pollution.