Lennox EL180UHE Series Manual page 22

Model Input
Gas
Size
Nat
045
LP/propane
Nat
070
LP/propane
Nat
090
LP/propane
Nat
110
LP/propane
Nat
135
LP/propane
High Altitude Pressure Switch Kit
Model
Input Size
0-4500 ft
045
070
090 No Change
110
135
NOTE - A natural to LP./Propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conversion
procedure.
Supply and Manifold Pressure Settings at all Altitudes
0-2000 ft 2001-4500 ft.
3.5
10.5
3.5
10.0
3.5
10.0
3.5
10.0
3.5
10.0
Pressure Switch and Gas Conversion Kits at all Altitudes
4501-7500 ft 7501 - 10,000 ft
8052W 80W51
80W52 80W51
80W52 80W51
80W57 80W52
80W52 80W51
TABLE 11
Manifold Pressure in. wg.
4501-7500 ft
3.2 3.0
10.0 10.0
3.2 2.8
10.0 10.0
3.2 2.7
10 9.6
3.5 3.0
10.0 9.6
3.5 2.9
10.0 9.6
TABLE 12
High Altitude
Natural Gas to LP/Propane
Natural Gas Burner
Orifice Kit
7501 - 10,000 ft 0 - 7500 ft
73W37 70W89
Page 22
Supply Pressure in.wg.
7501 - 10,000 ft
Min
3.5 4.5
10.0 11.0
3.5 4.5
10.0 11.0
3.5 4.5
10.0 11.0
3.5 4.5
10.0 11.0
3.5 4.5
10.0 11.0
Natural Gas Burner
Burner Orifice Kit
7501 - 10,000 ft
76W15
Max
13.0
13.0
13.0
13.0
13.0
13.0
13.0
13.0
13.0
13.0
LP/Propane to
Orifice Kit
0 - 7500 ft
73W81