Proper Combustion / High Altitude; High Altitude Information - Lennox EL296DFV Installation Instructions Manual

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. The maximum carbon
monoxide reading should not exceed 100 ppm.
TABLE 23
CO %
EL296
2 For Nat
Model
Low Fire High Fire
045 5.6 - 6.6 7.8 - 8.8
070 5.5 - 6.5 7.3 - 8.3
090 5.9 - 6.9 7.8 - 8.8
110 6.3 - 7.3 8.2 - 9.2
The maximum carbon monoxide reading should not exceed 50 ppm.
EL296
0-4500 ft.
Gas
Unit
Low
Fire
Natural 1.7
All
Sizes
LP/propane 4.9
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.
Conversion Kit and Pressure Switch Requirements at Varying Altitudes
Natural to
LP/Propane
EL296
Unit
0 - 7500 ft
(0 - 2286m)
-045
-070
*11K51
-090
-110
* 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).
CO %
2 For L.P
Low Fire High Fire
6.6 - 7.6 9.1 - 10.1
6.5 - 7.5 8.6 - 9.6
6.9 - 7.9 9.1 - 10.1
7.3 - 8.3 9.5 - 10.5
Manifold and Supply Line Pressures at Varying Altitudes
Manifold Pressure in. wg.
4501-5500 ft.
High Low High Low
Fire Fire Fire
3.5 1.6 3.3
10.0 4.6 9.4
High Altitude
Natural Burner
Orifice Kit
7501 - 10,000 ft
(2286 - 3038m)
73W37

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 25 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 24
5501-6500 ft. 6501 - 7500ft.
High Low High
Fire Fire Fire Fire
1.5 3.2 1.5
4.4 9.1 4.3
TABLE 25
High Altitude
LP/Propane Burner
Orifice Kit
7501 - 10,000 ft
(2286 - 3038m)
*11K46
Page 57
Supply Line
7501 - 10000ft.
Low High
Min
Fire Fire
3.1 1.7 3.5 4.5
8.9 4.9 10.0 11.0
High Altitude Pressure Switch
4501 - 7500 ft 7501 -10,000 ft
(1373 - 2286m) (2286 - 3048m)
14A47
14A55
14A54
14A46
Pressure
in. w.g.
0 - 10000 ft.
Max
13.0
13.0
14A50
14A56
14A53
14A51