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3C. Ductwork and Duct Connector
3B. Closet and Alcove Installation
To install the duct connector:
- Attach duct connector foam gasket along the perimeter of the duct
opening to seal the duct connector to the top of the duct.
- To connect the duct connector, insert it into the floor opening and
bend back the tabs inside the duct. Fold the tabs over 90 degrees to
ensure a secure connection. Seal around the duct connector.
- Slit the corners of the duct connector that stick up above the floor,
and then bend the sides over onto the floor surface.
- Insulate between the floor base and the floor when used on a com
-
bustible floor. Be sure to cut the insulation around the perimeter of
the duct connector opening.
- Install the floor base over the floor opening with the flanges on the
11 x 13 inch opening facing down.
- Use four screws to secure the floor base to the floor.
These units are designed to be installed in a closet or an alcove.
If installing the electric furnace into a closet or an alcove, the unit
must leave front clearance to service the unit. The bottom of the unit
should also rest on a sturdy platform or floor.
Airflow must be made available to the electric furnace’s return. Not
doing so may cause improper heating as well as premature heating
element failure.
Duct systems should be installed in accordance with standards for
air-conditioning systems, National Fire Protection Association Pam-
phlet No. 90A or 90B. They should be sized in accordance with Na
-
tional Environmental System Contractors Association Manual K, or
whichever is applicable. It is recommended that installers refer to
the “Manufactured Housing Duct System Guide to Best Practices”
by MHI-MHRA.
On any job, non-flammable flexible collars should be used for the
return air and discharge connections to prevent transmission of vi-
bration. Although these units have been specially designed for quiet,
vibration-free operation, air ducts can act as soundboards if poorly
installed.
All main supply and return air drops should be properly sized as
determined by the designer of the duct system and should not nec-
essarily be the size of the duct flange openings of the unit. (The duct
size should never be smaller than the flange openings of the electric
furnace supply and return air openings.)
It is recommended that wherever supply and return air sheet metal
ducts pass through unconditioned areas, they be insulated to pre-
vent excessive heat loss during heating operation. When applied in
conjunction with summer air conditioning, sheet metal duct routed
through unconditioned areas should be insulated and have an out-
side vapor barrier to prevent formation of condensation.
Ensure that the unit is adequately sized.
The tonnage of the outdoor unit should
never exceed the tonnage of this unit.
CAUTION
!
Fig 3B-2. Closet Installation
Fig 3B-3. Alcove Installation
Wall Mount Return Air Grille
Wall Mount Return Air Grille
Front of Electric Furnace
Coil
4. Electrical Line Voltage Wiring
These units are designed for single or three phase 208/240 volts, 60
HZ power supply. Wire selection and wiring must be in accordance
with the National Electric Code and/or local codes. Unit terminals are
designed to accommodate copper and aluminum wiring. If aluminum
wiring is used: please observe special precautions relative to sizing,
wire connections and corrosion protection.
All models with 5,8 or 10 kW electric heat are arranged for single
circuit connections. Models larger than 10 kW are arranged for multi-
circuit protection. Refer to top part of wiring diagram at the end of this
guide for detailed information.
Summary of Contents for AAN Series
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