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Figure 10
COMBUSTIBLE
MATERIAL
Radiation Shield Installation
ELO183DH UNIT
(TOP)
RADIATION
SHIELDS
RADIATION SHIELDS
(SEE NOTE 1)
FLUE
PIPE
UNIT
CABINET
NOTE 1-Radiation shields must be constructed of 24 gauge sheet
metal minimum.
NOTE 2-Radiation shields required when A is less than 9” (229mm).
NOTE 3-Radiation shields should extend from the top of the unit to
the top of the flue pipe.
NON-COMBUSTIBLE
SPACERS
ELO183DH UNIT
(FRONT)
(SEE
NOTE 3)
B
A
A
(SEE NOTE 2)
7”
(178 mm)
12”
(305 mm)
1”
(25 mm)
min.
Barometric Draft Control Installation
Install the provided barometric draft control in the flue pipe
at least 12 inches
beyond the furnace flue outlet to pro
vide space for flue gas sampling. The barometric draft con
trol may be installed in either vertical or horizontal sections
of the flue pipe; however, it should be positioned
no more
than 18”
beyond the furnace flue outlet. Follow the instruc
tions packed with the barometric draft control.
Supply & Return Air Plenums
NOTE - Following these suggestions when installing sup
ply and return air plenums.
1. Use sealing strips of fiberglass.
2. In all cases, the plenum should be secured to furnace
or evaporator cabinet with sheet metal screws.
3. Both supply and return air plenums shall be square
and least 18” long. They should be the same dimen
sion as the furnace opening.
4. If unit is installed in a confined space such as a utility
room where there is no complete return air duct sys
tem, a return air connection should be run (the same
size as the return air opening) to a location outside the
room containing the furnace.
5. Install supply and return air ducts as desired.
Optional Filter Kit
An Optional filter kit is available for ELO183DH units. Kit
35K05 is used with ELO183DH-101/114 units, and kit
35K06 is used with ELO183DH-135/150 units. All kits in
clude the following:
S
2 filters
S
3 rods
S
7 screws
S
1 rack assembly
S
1 panel
ELO183DH Filter Rack Installation
1. Slide filter rack over return duct flanges.
2. Using a scriber through the filter rack mounting holes,
mark seven mounting hole locations in the return end
of the cabinet. See figure 11.
3. Remove filter rack and drill 1/8” diameter holes at the
marked positions.
4. Place filter rack in position again and secure it to the
cabinet using the sheet metal screws provided. Clear
ance for the screw driver is provided in outside holes
of rack and in filter support angles.
5. Bend the ends of filter rods and hook ends through
holes provided in top and bottom filter support angles.
6. Slide filter between the support angles and the plenum
side for the filter rack. The filter rods hold the filter in
place.
Figure 11
FILTER RACK
FILTER
RETURN
AIR DUCT
(Not Furnished
by Lennox)
OPENING
IN UNIT
(Either Side)
14 (356)
22 (559)
ELO183DH Optional Filter Kit
Oil Supply Line Sizing
Ensure that the restrictions of the piping system, plus any
lift involved, do not exceed the capability of the oil pump.
Use the following guidelines when determining whether to
use a single-or two-stage oil pump.
