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Equipment In Confined Space
All Air From Outside
Outlet Ai
r
Inlet A
ir
Water
Heate
r
Chimney
Or Oil
Vent
Figure 3
NOTE-Each air duct opening shall have a free area of at least one
square inch (6.4 square centimeters) per 2,000 Btu (586 W) per hour
of the total input rating of all equipment in the enclosure. If the equip
ment room is located against an outside wall and the air openings
communicate directly with the outdoors, each opening shall have a
free area of at least one square inch (6.4 square centimeters) per
4,000 Btu (1172 W) per hour of the total input rating of all other equip
ment in the enclosure.
Oil
Furnace
CAUTION
Combustion air openings in the front of the furnace
must be kept free of obstructions. Any obstruction
will cause improper burner operation and may re
sult in a fire hazard or injury.
CAUTION
The barometric draft control shall be in the same at
mospheric pressure zone as the combustion air in
let to the furnace. Deviation from this practice will
cause improper burner operation and may result in
a fire hazard or injury.
Installation
When installed, ELO183DH furnaces must be level. If the
furnace is not level, place fireproof wedges or shims be
tween the low side of the furnace and floor. Make sure the
weight of the furnace is evenly distributed on all four cor
ners. Strain on sides of the cabinet causing cracking and
popping noises may occur if weight of furnace is not evenly
distributed.
Set the unit in desired location keeping in mind the clear
ances list in tables 2 and 3. Also keep in mind oil supply
connections, electrical supply, flue connections and suffi
cient clearance for installing and servicing unit.
ELO183DH series units may be installed in a crawl space
under a house, utility room or in a wide variety of sus
pended applications.
Horizontal Application
The ELO183DH furnace is shipped from the factory in the
horizontal left hand air discharge application. Air flow may
be reversed to right side discharge or unit may be used as
downflow.
1. Reversing Airflow for Right Hand Discharge
D
Rotate the furnace 180
_
so that, when facing the
front, the warm discharge is to the right.
D
Remove the nuts in the bracket that hold the burn
er to the furnace front. Rotate the burner and burn
er mounting plate 180
_
and reinstall the nuts.
D
Remove the screws that hold the limit control in
place. Use the provided knockout hole to relocate
the limit control to the top side of the front panel.
2. Installation on Non-Combustible Material
D
Set the furnace on non‐combustible material
(such as concrete blocks, bricks or angle iron).
Install spacer legs, provided with unit, by using the
cabinet screws from each corner of the unit.
D
Use a level to check the level of furnace in at least
two directions. Use shims or non‐combustible ma
terial. A minimum clearance of 1” must be main
tained between bottom of furnace and combus
tible material.
3. Suspended Installation
D
To suspend the furnace, remove knockouts in top
of panel at warm air discharge and at blower panel
(Refer to unit dimensions). Use 3/8” rods cut to de
sired length.
D
Use one flat washer and two nuts for each rod (a
nut and washer on the inside of unit and the other
“locking” nut on the outside of unit; see figure 4).
Level the unit by adjusting the nuts on the inside of
unit.
ROD
LOCKING
NUT
TOP OF
FURNACE
WASHER
BLOWER COMPARTMENT
DIVISION PANEL
Hanger Rod Installation
Figure 4
NUT
Downflow Application
When installing the ELO183DH in a downflow position and
on combustible flooring, a combustible floor base must be
used. See Unit Dimension illustration.
1. Rotate the furnace so that return is on top and supply
is on bottom. Refer to table 3 for clearances to com
bustible flooring.
2. Remove the nuts in the bracket that hold the burner to
the furnace front. Rotate the burner and burner mount
ing plate 90
_
and reinstall the nuts.
