Lennox EL296E User Manual

Page 51
Proper Combustion
Furnace should operate minimum 15 minutes with correct
manifold pressure and gas flow rate before checking com
bustion. Take combustion sample beyond the flue outlet
and compare to the tables below.
TABLE 16
EL296
Model
CO
2
%
For Nat
CO
2
%
For L.P
Low Fire High Fire Low Fire High Fire
045 5.4 - 6.4 7.5 - 8.5 6.4 - 7.4 8.8 - 9.8
070 5.3 - 6.3 7.4 - 8.4 6.3 - 7.3 8.7 - 9.7
090 5.8 - 6.8 7.6 - 8.6 6.8 - 7.8 8.9 - 9.9
110 6.1 - 7.1 8.0 - 9.0 7.1 - 8.1 9.3 - 10.3
135 6.1 - 7.1 7.8 - 8.8 7.1 - 8.2 9.1 - 10.1
The maximum carbon monoxide reading should not exceed 50 ppm.
High Altitude Information
NOTE - In Canada, certification for installations at eleva
tions over 4500 feet (1372 m) is the jurisdiction of local au
thorities.
Units may be installed at altitudes up to 10,000 ft. above
sea level without manifold adjustment. Units installed at al
titude of 4501 - 10,000 feet (1373 to 3048m) may require a
pressure switch change which can be ordered separately.
Table 18 lists conversion kit and pressure switch require
ments at varying altitudes.
The combustion air pressure switch is factory-set and re
quires no adjustment.
TABLE 17
Manifold and Supply Line Pressure 0-10,000ft.
EL296
Unit
Gas
Manifold Pressure in.wg. Supply Line Pressure in. w.g.
Low Fire High Fire Min Max
All Sizes
Natural 1.7 3.5 4.5 10.5
LP/propane 4.9 10.0 11.0 13.0
NOTE -
A natural to L.P. propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conversion
procedure.
TABLE 18
LP/Propane Conversion Kit and Pressure Switch Requirements at Varying Altitudes
EL296
Unit
Natural to
LP/Propane
High Altitude
Natural Burner
Orifice Kit
High Altitude
LP/Propane Burner
Orifice Kit
High Altitude Pressure Switch
0 - 7500 ft
(0 - 2286m)
7501 - 10,000 ft
(2286 - 3038m)
7501 - 10,000 ft
(2286 - 3038m)
4501 - 7500 ft
(1373 - 2286m)
7501 -10,000 ft
(2286 - 3048m)
-045
*78W93 73W37 *78W96
93W81 93W84
-070 93W80 93W85
-090 93W82 93W80
-110 93W80 93W85
-135 93W83 93W85
* Conversion requires installation of a gas valve manifold spring which is provided with the gas conversion kit.
Pressure switch is factory set. No adjustment necessary. All models use the factory-installed pressure switch from 0-4500 feet (0-1370 m).

Lennox EL296E Specifications

General

Brand	Lennox
Model	EL296E
Category	Furnace
Language	English