Greenheck Fan VSU manual Installation continued, Burner/Blower Section, Install Ductwork

Installation continued

2. Burner/Blower Section

Use a crane and a spreader bar hooked to the factory lifting lugs (shown below) to lift and center the unit onto the filter stand section. The sections can be caulked together, but it is not needed with the water kickouts provided with this section.

3. Install Ductwork

This table shows the duct sizes and straight lengths recommended for optimal performance (AMCA Publication 201-90). Using duct sizes less than recommended will affect fan performance. Good duct installation practices should be followed for the remaining ductwork. See the drawings in the Dimensional Data section for duct locations.

Recommended Supply Ductwork Sizes

VSU	Duct	Straight Duct
Blower Size	Size	Length
220	68 x 26 inches	117 inches

4. Complete Installation

A typical horizontal discharge installation is shown. Gas and/or electrical lines can be connected at this time.

For upblast units, a duct elbow may be needed to turn the ductwork into the building. Follow proper ductwork methods recommended by AMCA to make this elbow to minimize duct losses.

4Model VSU Make-Up Air

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