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Installation
N N o o t t e e : : Refer to all dimensional data within the manuals equipped with your unit.
Single Furnace Units
Single furnace units (capacities 10-40) consist of a furnace section and an air handler section
mounted on a common base rail.
Multiple Furnace Units
Multiple furnace units consist of two sections: a furnace section with two duct furnaces
(capacities 50-80) or three duct furnaces (capacity 12) mounted on a common base rail; and a
separate air handler section mounted on its own base rail. A flexible connector kit is also
equipped with your unit. Each section has a label with Order No., Model No., Unit No., and Part
No. marked on it. Make certain that the order, model, and part numbers agree on each section to
be connected together. The two sections should be moved individually and mounted in their
permanent location (see "Suspension/Rigging" sections). Ensure that both flange assemblies are
in alignment with a 5" (127mm) space between the flange assemblies. See the following
instructions for installation of the flexible connector kit between the two sections.
Installing Flexible Connector
N N o o t t e e : : Refer to
1. Make sure that the furnace section and the air handler section are in alignment and installed
2. Remove the top extension panel of the duct furnace for access to the inside bottom flange
3. Measure flexible connector in the flat to confirm that it is correct for the unit being installed.
4. Measure the distance from the top of the flange assembly to the slot at the bottom of the
5. Slide the flexible connector through the slots in the flange assemblies until the vertical part is
6. Bend second vertical section up around the flanges. Make sure all bends are straight and
7. Bend down top section of flexible connector. Cut metal parts of flexible connector to overlap
8. Screw metal portions of flexible connector to the flange assemblies using drill screws. Space
9. Apply sealing tape to seams between flanges and flexible connector and to vertical flange
Table 1. Flexible Connector Kit
14
Figure 6, p.
15,
with a 5" (127mm) space between the flange assemblies.
assemblies.
Refer to the Flexible Connector Kit Table following step #9. Make a 90 degree bend 4"
(102mm) from one end of the flexible duct connector.
flange assembly. Make a second 90 degree bend at the measured distance from the first bend
in the flexible duct connector.
tight against the sides of the flange assemblies.
even for proper fit.
the 4 inch section by at least 1-1/2 inches (38mm), but cut the fabric portion 1-1/2 inches
longer than the metal.
the screws approximately 4 to 6" (102 to 152mm) on center. Fasten the bottom section in
place by screwing down from the inside. Fasten the overlapped area with two screws in the
metal on each side of the fabric. Seal the fabric joint with RTV sealer and allow to cure.
Replace and reseal top extension panel on furnace section.
connections. Test for air leaks during initial start-up. Reseal as required.
Unit Capacity
50
60
Figure 7, p.
16,
Figure 8, p.
(Approx.) Straight Length Flexible Connector
17,
Figure 9, p.
18,
Figure 10, p.
Required
102 Inch (2.59m)
114 Inch (2.90m)
MUA-SVX006B-EN
19.
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