?oleman FL8-UH Installation Instruction - page 10
035-17405-000 Rev. B (0801)
10
Unitary Products Group
UPFLOW/HORIZONTAL MODELS -
UPFLOW APPLICATION
Supply Plenum Connection
Attach the supply plenum to the furnace
outlet duct connection flanges. This is typi-
cally through the use of S cleat material
when a metal plenum is used. The use of
an approved flexible duct connector is rec-
ommended on all installations. This connec-
tion should be sealed to prevent air
leakage.
If a matching cooling coil is used, it may be
placed directly on the furnace outlet and sealed to prevent
leakage. Follow the coil instructions for installing the supply
plenum.
On all installations without a coil, a removable access panel
is recommended in the outlet duct such that smoke or
reflected light would be observable inside the casing to indi-
cate the presence of leaks in the heat exchanger. This
access cover shall be attached in such a manner as to pre-
vent leaks.
Return Duct Connection
Return air may enter the furnace through the side(s) or bot-
tom depending on the type of application. Return air may
not be connected into the rear panel of the unit. Refer to
the “Filters Installation” section for the type of application
desired for specific installation details.
NOTE:In order to achieve the airflow indicated in the table, it
is recommended for those applications over 1800 CFM use
return air from two sides, one side and the bottom, or bottom
only. For bottom only application, see data and notes on
blower performance data tables in this manual.
FILTERS INSTALLATION - (UPFLOW/HORIZON-
TAL)
All applications require the use of a filter. A high velocity filter
and retainer are provided for field installation on all models,
except FL8. These models must have a field supplied filter
and retainer.
Internal Installation
1.
Select desired filter position (left/right side, and/or bot-
tom). Remove the corresponding cabinet cut-outs per
instructions provided.
2.
Install snap-in retainer clips into the corresponding slots
from the outside rear of the cabinet. Refer to Figure 4 on
page10. To prevent cabinet air leaks, install snap-in
plugs (provided) into the unused slots at the outside rear
of the cabinet.
3.
Install the wire retainer (if provided) inside the cabinet.
Insert the open ends of the wire retainer into the clip
loops at the rear of the blower compartment. The
retainer wire should pivot freely like a hinge, on the clips
at the rear of the cabinet. Refer to Figure 3.
4.
Install the filter(s), if provided. Cut filter if necessary to
match air opening in cabinet. Filter should extend
beyond opening edge as much as possible to prevent air
from bypassing the filter. DO NOT remove stiffening rods
from inside the filter. Shorten the rods, if necessary, to
match final filter size.
5.
Position the filter between the wire retainer and the cabi-
net wall (or floor) so it completely covers the cabinet air
opening and secure the filter in place at the front of the
cabinet by fastening the closed (looped) end of the
retainer wire under the flanged edge of the cabinet.
When properly installed the filter should fit flush with all
four sides of the cabinet wall.
NOTE: Air velocity through throw-away type filters may not
exceed 300 feet per minute. All velocities over this require the
use of high velocity filters.
FIGURE 3 : SIDE FILTER RETAINER PLACEMENT
FIGURE 4 : FURNACE FILTER SLOT LOCATIONS