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Installation of Mounting Angles
Measure the duct height and width.
Height = _________
Width = _________
The mounting angles are to completely surround the duct. Mark the duct floor with a line a
minimum of 8" from the end of the drain pan and perpendicular to the ducts airflow. Now
continue the line up vertically up the walls and finally across the ducts ceiling.
Each angle measures 95.5 inches. Enough length of angle is supplied to cover the perimeter of
the duct but they must be cut to fit. Over-lapping joints slightly is recommended for the floor
angles only as they should be sealed along the entire length of angle with appropriate caulking
to prevent free air flow through the drain pan. Angles may have to be cut in half to make-up two
4ft lengths. When securing the mounting angles to the duct place the side with circular holes
against the duct and the bent edge along the marked line.
Orient the mounting angle as shown in Detail A in Figure 21: Mounting Angles. Using field
supplied self taping screws attach the mounting angle to the duct via the round mounting holes.
A screw every 18 inches is recommended.
Figure 20: Drainage and Drains
Figure 21: Mounting Angles
HP Series Installation Manual | 28
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