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INSPECTION & INSTALLATION
4.7.1 Installation Instructions for Air Ducts and Air Connectors - Nonmetallic with Plain Ends
Connections - Using Tape and Fasteners
Splices - Using Tape and Fasteners
1. After desired length is determined, cut completely around and through duct with knife or scissors. Cut wire with wire cutters. Fold back jacket and insulation.
1. Fold back jacket and insulation from core. Butt two cores together on a 4" [100 mm] min. length metal sleeve.
2. Slide at least 1" [25 mm] of core over fitting and past the bead. Seal core to collar with at least 2 wraps of duct tape. Secure connection with clamp placed over the core and tape and past the bead.
2. Tape cores together with at least 2 wraps of duct tape. Secure connection with 2 clamps placed over the taped core ends and past the beads.
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3. Pull jacket and insulation back over cores. Tape jackets together with at least 2 wraps of duct tape.
3. Pull jacket and insulation back over core. Tape jacket with at least 2 wraps of duct tape. A clamp may be used in place of or in combination with the duct tape.
NOTES: 1. For uninsulated air ducts and air connectors, disregard references to insulation and jacket. 2. Use beaded sheet metal fittings and sleeves when using nonmetallic clamps. 3. Use tapes listed and labeled in accordance with Standard UL 181B and marked “181 B - FX ”. 4. Nonmetallic clamps shall be listed and labeled in accordance with Standard UL 181B and marked “181 B - C ”. Use of nonmetallic clamps shall be limited to 6 in. w.g. [1500 Pa] positive pressure.
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