Friedrich OES Series, Руководство по установке и эксплуатации

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920-138-02 (3-04) 920-138-02 (3-04)
Forming the Duct Flanges
To minimize the possibility of shipping damage, all units are
shipped with field formed duct flanges. These flanges must
all be formed into place prior to mounting the unit.
The perforated bend lines of the duct flanges provide
a location for field hand bending/forming to occur in a
repeatable manner. When forming the flanges, begin at the
upper most perforations and work from top to bottom. The
procedures for bending the duct flanges are as follows:
• Face the back side of the unit, which is the side that will
ultimately make contact with the mounting surface. (See
Figure 4.)
•
Wearing protective gloves, grasp the center of the
metal flange with both hands and gradually bend
outward at approximately a 45 degree angle.
• Continue this process until the entire length of the
flange is bent to a 45 degree angle.
• Starting back in the center, grasp the flange with both
hands and complete the bend to 90 degrees along the
entire length. The flange should now be perpendicular
to the rear of the cabinet. (See Figure 5.)
• Repeat the above steps for each of the eight
perforated metal flanges on the rear of the cabinet.
When completed, there will be eight duct flanges that
are perpendicular to the rear of the cabinet. (See
Figure 5.)
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CAUTION: Repeated bending of the flanges from
flat to the perpendicular position will eventually weaken
the sheet metal and ultimately cause failure of the metal
flanges.
Installing Sealing Gaskets
In order to ensure a proper air seal between unit and the
building, the factory-supplied sealing gaskets must be
applied. Failure to install the gaskets may result in air leaks
and poor unit performance.
• Facing the mounting side of the unit, retrieve the
sealing gaskets from the return air opening of the
unit.
• Next, apply a piece of the gasket vertically to both
the left and right side of the air openings as shown.
• With the remaining gasket, seal the top and bottom
of both the supply and return air opening as shown.
Gaskets may be cut with a utility knife or torn by hand to
the proper length.
Left Side Duct Flanges as Shipped
Figure 4
Duct Flanges as Shipped
Formed Duct Flanges
Left Side
Figure 5
Formed Duct Flanges with Gaskets Installed
MOUNTING PREPARATIONS