【 Weak current College 】 HVAC engineering operations Essentials---Power By 【 China power house network 】

1. in the case of wind pipe production operation points

1. circular duct of three or four way, its angle 15-60 degrees should, angle tolerances should be less than l °.

2. duct connection of various pipe should be accessible, appropriate to the length of the pipe-4.0, welding 1.8 air duct and spiral duct can be lengthened.

3. the wind pipe and flange connections, such as flange dimensions should be 6mm-9mm flanging should be smooth, without holes.

Second, hard PVC duct parts preparing action points

1. wind pipes horizontally, the levels of allowable deviation per m should not be greater than the total deviation 3mm, should not be greater than 20mm. Duct mounted vertically; vertical degree allowable deviation per m not degree is greater than the total deviation 2mm, should not be greater than 20mm

2. branch of the crane, the carrier should not be set in a outlet, outlet valve inspection, hanger shall directly and swing on the flange.

3. fire damper installation direction location should be correct, fusible parts shall mount after system installation.

4. installation of the various types of diffusers should be smooth, location should be correct, the rotating part and flexible, and duct connections should be tight.

Third, air treatment, make and install operation points

1. metal air handling unit of the segments of the packaging, flatten firmly connected tightly in place, spray section shall not leaking.

2. air spray segments leaking door shall review, condensation of upper tube pass should be free on ropes, condensate water shall not be spillover.

3. embedded in brick, concrete, air treatment room for, backwater short tube should be welded square rib plate, pipe-end should confect flange or silk mouth, from the processing Chamber walls to lOOmm-150mm.

4. surface-or heat exchanger thermal surface should be clean and complete.

IV. muffler produce and install operationpoints

1. selection of acoustic materials should comply with the design of waterproof, corrosion, moisture requirements.

2. muffler perforation plate should be smooth, uniform holes should be arranged without burrs, the perforation rate should meet the design requirements.

3. noise piece monomer installation, fixed-end must not loose, film distance should be uniform.

4. muffler and muffler elbow bracket should be separate set, its weight shall not bear the air duct.

5. dust collector of fabrication and installation of action points

1. the filter cylinder diameter or rectangle outside dimensions allowable deviation should not be greater than 5% of its internal and external surfaces must be smooth, uniform curvature.

2. filter and export should be straight, cylinder exhaust pipe with cone coaxial, under Lu should be no greater than its eccentric. 2mm

3. the removal of dust, should be installed in the correct position, solid and smooth, and export orientation must meet the design requirements, perpendicularity of allowable deviation per meter should not be greater than the total deviation 2mm, should not exceed 10 mm..