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HVACR115 – Mechanical for Gas Heat

HVACR115 – Mechanical for Gas Heat. Sheet Metal Installation. http://www.youtube.com/watch?v=LJbFUM0Lnnw. Sheet Metal Tools. Sheet Metal Hammer. Tin Snips Right Hand: Red Handle-cuts left Left Hand: Green Handle-cuts right.

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HVACR115 – Mechanical for Gas Heat

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  1. HVACR115 – Mechanical for Gas Heat Sheet Metal Installation

  2. http://www.youtube.com/watch?v=LJbFUM0Lnnw

  3. Sheet Metal Tools • Sheet Metal Hammer

  4. Tin Snips • Right Hand: Red Handle-cuts left • Left Hand: Green Handle-cuts right

  5. Crimpers: Turns the end of metal pipe or fittings into a crimped male end for connecting.

  6. http://www.youtube.com/watch?v=uH5wRVVmgh8

  7. Notchers: Used to notch corners of rectangular ductwork before bending.

  8. Folding Bar: Makes 1” bends for flanges or ½” “ears” for connecting ducts with drive cleats

  9. Hand Seamers: Makes ¼” to 1” bends

  10. Bulldog Snips: Makes straight cuts of large sections of sheet metal

  11. Duct Stretchers: Brings the “ears” of two ducts closer together in order to connect drive cleat.

  12. Scratch Awl: Makes well defined lines in sheet metal when laying out fittings.

  13. Adjustable Dividers (Scribers, Compass): Used to scribe radius angles on sheet metal.

  14. Common method of connecting rectangular sheet metal ducts: • Using drive cleats and S-slip. • S-slip or S-locks slide over horizontal edges of one piece of rectangular duct. • Vertical edges are folded back ½” to form “ears. • Horizontal edges of second piece of duct are slipped into s-lock • Drive cleats are hammered onto the two sets of ears.

  15. Drive Cleat

  16. http://www.youtube.com/watch?v=WF8JZ1t_nm4

  17. Hole Cutter: Make precise hole in sheet metal

  18. http://www.thisoldhouse.com/toh/video/0,,20504377,00.html

  19. Flex duct cutter: Has knife for slicing flex membrane and insulation, and pliers for cutting spiraled wire. Comes with sheath. • Hint: Never cut wire with tin snips.

  20. Flex strap tightener

  21. Turbo shears: Can be electric or air powered for fast cuts

  22. Stapler: Used to wrap insulation around duct.

  23. Small tape measure for measuring radius, circumference.

  24. Sheet Metal Fabrication Machinery • Pittsburg (Lockformer) Machine: • One side of a piece of sheet metal is run through machine and formed to receive a ¼” edge on opposite side. • Flat sheet is bent into rectangle shape, • Pittsburg is opened slightly with screwdriver, • ¼” edge is inserted, • Pittsburg is hammered over, locking into place.

  25. http://www.youtube.com/watch?v=n8GLOFkOxjM&feature=related

  26. http://www.youtube.com/watch?v=-p4P4qoXMzQ

  27. http://www.ronhazelton.com/projects/replacing_a_central_air_conditioning_systemhttp://www.ronhazelton.com/projects/replacing_a_central_air_conditioning_system

  28. Break: Used to bend sheet metal. • Can be 8’ for shop, • Or 4’ to transport to job for furnace replacements. • Counter weighted for ease of operation. • Never place hand between upper leaf and bending leaf.

  29. Shear: Used to slice sheet metal. • Can be pneumatic with foot pedal, • Or operated with foot lever.

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