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INSTALLATION Magic-Pak: HW/HWC
SRM-HW/HWC 8/99
Installing Without a Wall Sleeve
Refer to the following directions and Figure 6-1 on page 6-5 for guidance
in installing the unit without a wall sleeve:
1. Measure the size of the unit and provide an opening in an outside
wall that will accept the unit. Local ordinances may require a steel
lintel to support the wall above the opening. The opening must be
square in all four corners.
2. Position the unit so that the grilles on the outside face of the unit are
flush or extend beyond the face of the exterior wall, but not recessed
more than 2" from the face of the building. Provide a support
under the unit, inside the building. Make sure that the inside
support does not block the return air. The unit should be installed
level or pitched slightly to the outside of the building so that rain water
will drain away.
3. Seal the space between the unit and building opening using a non-
hardening caulking compound. The seal must be weathertight to
prevent entrance of moisture and water into the building. Make sure
the drain holes in the base are not plugged with caulking.
Support
In general, the wall sleeves will support the Magic-Pak HW/HWC units on
any wall. The wall, however, must be adequate to support the unit.
Otherwise, one must provide additional support between the unit and the
floor. The center of gravity is between the bottom return-air opening rear
flange and the wall sleeve. When additional support for the unit is desir-
able, it should be near this center of gravity and applied evenly across the
bottom of the unit through adjustable legs to the floor.
A supplementary support can be made for this purpose. It should consist
of two steel channels, 28" long, one placed under the unit and one on the
floor. They are separated by 3/4" pipe and “all-thread” rod, with nuts and
washers, to provide the adjustment pressure. Vibration-isolation blocks or
pads are also required to minimize transmission of vibration into the floor.
Even though the wall may be adequate to support the unit, experience
has shown the desirability of supplementary support to reduce the
possibility of vibration being transmitted into the wall and to other parts of
the structure.
Two 1" diameter holes are located near the front of the Magic-Pak HW/
HWC units, on either side of the return-air opening. These holes are
intended to allow a condensate drain tube to exit the return-air duct cavity
whenever a closed return duct and flexible collar are used. These
should not be used to support the unit. The sheet metal in the
cabinet in this area is not heavy enough to act as a support without
distorting and interfering with proper retention of the filter access cover.