Nortec HP Series - Manual (Page 32)

29 | HP Series Installation Manual
Installation of Mounting Channels
Before installing the mounting channel or channels the starting mounting point needs to be
determinedusing the duct width. If the duct width is 4ft or less then there is no need for a
mounting channel, continue to the next step.
Table 1. Mounting Channel Locations
Duct Width Mounting Position Number of Channels
4ft - 8ft Middle 1
8ft - 12ft Offset 2ft from middle 2
12ft - 16ft Middle 3
16ft - 20ft Offset 2ft from middle 4
Once the mounting location is determined the mounting channel(s) are ready to be cut to fit,
keeping in mind that drain pans are not level and lengths may vary. From the starting point,
each additional mounting channel is placed at 4ft centers. In the figure below a typical 4ft x 8ft
installation is shown with the mounting angle surrounding the perimeter and a mounting
channel installed vertically at the center point of the duct.
In Figure 23: Large Duct Mounting Channel Locations, a 6ft high x 10ft wide mist eliminator
frame is shown. Notice how the mounting channel placement is offset from the center.
Installations between 8ft x 12ft to 16ft x 20ft may involve the removal of excess material.
Excess material is removed equally from both sides of the frame not from the middle.
To secure the mounting channel in place use the factory supplied ½ inch self-threading screws.
Use the center row of slotted holes to attach the mounting channel to the mounting angle.
Place one screw at the top and one at the bottom making sure that the mounting channel is
level or square to the ceiling, this will help for mounting the wire mesh. See Figure 24:
Mounting Channel Installation.
If the duct height greater than 8 feet a channel extension is needed in order to link 2 mounting
channels together. The extension slides inside the mounting channel. Use 4 ½ inch factory
supplied screws for each mounting channel as shown in Figure 25: Mounting Channel Extension
Kit.